TM 9-4910-531-14 CLEANER STEAM, HIGH PRESSURE, WATER JET, TRAILER MOUNTED

8/14/2019 TM 9-4910-531-14 CLEANER STEAM, HIGH PRESSURE, WATER JET, TRAILER MOUNTED

1/447

TM 9-4940-531-14

TECHNICAL MANUAL

OPERATORS, UNIT, DIRECT SUPPORT, ANDGENERAL SUPPORT MAINTENANCE MANUAL

FOR

CLEANER, STEAM, HIGH PRESSURE

HOT AND COLD WATER JET, TRAILER MOUNTED(NSN 4940-01-025-9856) (EIC: 2BC)

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

DESTRUCTION NOTICE: For classified documents, follow procedures in DoD 5200-.22-M, Industrial Security Program Manual,Section II. For unclassified, limited documents, destroy by any method that will prevent disclosure of contents or reconstruction ofthe document.

HEADQUARTERS, DEPARTMENT OF THE ARMYAUGUST 1994


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TM 9-4940-531-14

WARNING

Ensure power source is properly grounded before operating steam cleaner to avoid

electrical shock.

Wear safety goggles/glasses and gloves to prevent injury from scalding and high water

velocity when operating the steam cleaner in any mode.

Hearing protection is required as the steam cleaner projects high intensity noise during

blowdown; failure to do so could result in hearing loss.

USE CAUTION when using dry cleaning solvent (item 22, appx E). Cleaning solvents

evaporate quickly and can irritate exposed skin on contact. In cold weather, contact of

exposed skin with cleaning solvent can cause frost bite.

Do not install steam cleaner in areas containing flammable materials or gases. Severe

injury or death from fire or fumes may result.

Steam cleaner weighs 1365 lb (619.16 kg) wet, 1185 lb (537.52 kg) dry. Generator set

weighs 600 lb (272.16 kg) wet, 585 lb (265.36 kg) dry. To avoid injury, do not attempt

to lift without proper equipment.

Do not allow steam cleaner to produce steam with deliming solution in coil unit assembly.

Injury to personnel may result from fumes or hot acid splash.

To avoid injury from toxic fumes, when working with acids, always pour acid into water,

never water into acid.

Proper clothing protection should be worn and all precautions read when working with

sulfamic acid and sodium hydroxide; refer to paragraph 5-23. Moisture in the skin will

activate the chemical, causing severe irritation or burns.

To avoid injury, do not install steam cleaner in closed areas; proper ventilation is re-

quired.

Avoid touching or coming into contact with steam, hot water, or other parts of equip-

ment that are subjected to high temperatures to prevent serious burns.

Diesel fuel is FLAMMABLE; DO NOT SMOKE in vicinity while performing servicing

operations. To avoid burns, do not use flammable cleaning materials.

The operator must remain approximately 10 ft (3.05 m) from steam cleaner during

blowdown to avoid possible burns.

Avoid moving parts when steam cleaner is in operation to prevent serious injury.

To avoid electrical shock, disconnect electrical power before beginning maintenance on

the steam cleaner.

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TM 9-4940-531-14

If control panel must be opened for testing and S2 and S3 sensitive switches held

closed, use extreme caution to prevent electrical shock.

When using compressed air, keep nozzle away from exposed skin. To avoid injury,

wear eye protection when blowing dust and debris out of steam cleaner with com-

pressed air.

To avoid injury, do not tamper with pressure settings of regulating valves. Otherwise,

there may be excessive pressure buildup.

To avoid injury, if outlet pressure ever exceeds 675 psi (4654 kPa), turn EMERGENCY

OFF switch to OFF position and vacate area.

To avoid injury, if cleaning gun emits superheated steam, turn EMERGENCY OFF

switch of OFF position and vacate area.

For information on first aid, refer to FM 21-11.

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TM 9-4940-531-14

CHANGENO. 1

HEADQUARTERSDEPARTMENT OF THE ARMY

WASHINGTON, D.C., 30 July 2008

TECHNICAL MANUAL

OPERATORS, UNIT, DIRECT SUPPORT, AND

GENERAL SUPPORT MAINTENANCE MANUAL

FOR

CLEANER, STEAM, HIGH PRESSURE

HOT AND COLD WATER JET, TRAILER MOUNTED

(NSN 4940-01-9856) (EIC: 2BC)

DISTRIBUTION STATEMENT A:

5. Remove old pages and insert new pages as indicated below:

None A(B blank)

i-iv i-iv

DA 2028 DA 2028

Remove Pages Insert Pages

a - b a - b

Cover Cover

6. Replace the following work packages with their revised version.

7. Add the following new work packages.

Work Package Number

None

Work Package Number

None

Approved for public release; distribution is unlimited.

TM 9-4940-531-14, 01 August 1994, is changed as follows:

1. File this sheet in front of the manual for reference.

2. This change is the result of a different distribution statement.

3. New or updated text is indicated by a vertical bar in the outer margin of the page.

4. Added illustrations are indicated by a vertical bar adjacent to the figure number. Changed illustrations are

indicated by a miniature pointing hand adjacent to the updated area and a vertical bar adjacent to the figure number.


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Distribution:

To be distributed in accordance with the initial distribution number (IDN) 255402,requirements for TM 9-4940-531-14.

By Order of the Secretary of the Army:

GEORGE W. CASEY, JR.General, United States Army

Chief of StaffOfficial:

JOYCE E. MORROWAdministrative Assistant to the

Secretary of the Army0816903


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TM 9-4940-531-14

LIST OF EFFECTIVE PAGES / WORK PACKAGES

NOTE: The portion of text affected by the changes is indicated by a vertical bar in the outer margins ofthe page. Changes to illustrations are indicated by a vertical bar adjacent to the title. Zero in theChange No. column indicates an original page of work package.

Date of issue for original manual is:

Original . . . . . . . . . . . . . 01 August 1994Change 1 . . . . . . . . . . . . . 30 July 2008

TOTAL NUMBER OF PAGES FOR FRONT AND REAR MATTER IS 22.

Page/WP No. Change No. Page/WP No. Change No.

Front Cover 1Blank 0Warning summary (2 pgs) 0a-b 0

A-(B blank) Added 1i-iv 1

1-1 thru 1-21/1-22 blank 02-1 thru 2-41/2-42 blank 03-1 thru 3-21/3-22 blank 04-1 thru 4-100 05-1 thru 5-178 06-1 thru 6-7/6-8 blank 0

A-1 thru A-3/A-4 blank 0B-1 thru B-10 0C-1 thru C-5/C-6 blank 0D-1/D-2 blank 0E-1 thru E-4 0F-1 thru F-12 0FP-1/FP-2 blank 0FP-3/FP-4 blank 0FP-5/FP-6 blank 0FP-7/FP-8 blank 0Index-1 thru Index-11/Index-12 0blank

Metric Chart 0

PIN 0

A/B blankChange 1

DA 2028 Forms 1

New Text


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TECHNICAL MANUAL HEADQUARTERSTM 9-4940-531-14 DEPARTMENT OF THE ARMY

WASHINGTON, D.C. 01 August1994

Operators , Unit, Direct Support, and General SupportMaintenance Manual

ForCLEANER, STEAM, HIGH PRESSURE, HOT AND COLD

WATER JET, TRAILER MOUNTED (4940-01-025-9856) (EIC: 2BC)

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSYou can help improve this publication. If you find any errors, or if you would like to recommend anyimprovements to the procedures in this publication, please let us know. The preferred method is tosubmit your DA Form 2028 (Recommended Changes to Publications and Blank Forms) through theInternet, on the Army Electronic Product Support (AEPS) website. The Internet address is

https://aeps.ria.army.mil. The DA Form 2028 is located under the Public Applications section in the AEPSPublic Home Page. Fill out the form and click on SUBMIT. Using this form on the AEPS will enable us torespond quicker to your comments and better manage the DA Form 2028 program. You may also mail,e-mail, or fax your comments or DA Form 2028 directly to the U.S. Army TACOM Life Cycle ManagementCommand. The postal mail address is U.S. Army TACOM Life Cycle Management Command, ATTN:AMSTA-LC-LMPP / TECH PUBS, 1 Rock Island Arsenal, Rock Island, IL 61299-7630. The e-mailaddress is [email protected]. The fax number is DSN 793-0726 or Commercial (309)782-0726.

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

DESTRUCTION NOTICE: For classified documents, follow procedures in DoD 5200-.22-M, IndustrialSecurity Program Manual, Section II. For unclassified, limited documents, destroy by any method that will

prevent disclosure of contents or reconstruction of the document.

TABLE OF CONTENTSPage

HOW TO USE THIS MANUAL iii

CHAPTER 1 INTRODUCTION Page

Section I. General Information1-2Section II. Equipment Description and Data 1-4Section III. Principles of Operation 1-10

CHAPTER 2 OPERATING INSTRUCTIONS

Section I. Description and Use of Operators Controls and Indicators 2-1Section II. Operator Preventive Maintenance Checks and Services (PMCS) 2-9Section III. Operation Under Usual Conditions 2-21Section IV. Operation Under Unusual Conditions 2-41

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Change 1


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TM 9-4940-531-14

CHAPTER 3

Section I.

Section Il.

Section Ill.

CHAPTER 4

Section I.

Section Il.

Section Ill.

Section IV.

Section V.

Section VI.

CHAPTER 5

Section I.

Section Il.

CHAPTER 6

APPENDIX A

APPENDIX B

Section I.

Section Il.

Section Ill.

Section IV.

APPENDIX C

Section I.

Section Il.

Section Ill.

APPENDIX D

APPENDIX E

Section I.Section Il.

APPENDIX F

Page

OPERATOR MAINTENANCE INSTRUCTIONS

Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Operators Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

UNIT MAINTENANCE INSTRUCTIONS

Lubrication instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Service Upon Receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Preparation for Storage or Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-96

DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-44

GENERAL SUPPORT MAINTENANCE lNSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . 6-1

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

MAINTENANCE ALLOCATION CHART (MAC)

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

Maintenance Allocation Chart for Steam Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Tools and Test Equipment for Steam Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-10

Remarks for Steam Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-10

COMPONENTS OF END ITEM (COEI) AND BASIC ISSUE

ITEMS (BIl) LISTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Components of End Item . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Basic Issue Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-5

ADDITIONAL AUTHORIZATION LIST (AAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

EXPENDABLE AND DURABLE ITEMS LIST

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-1Expendable and Durable Items List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2

ILLUSTRATED LIST OF MANUFACTURED ITEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1

ALPHABETICAL INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

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TM 9-4940-531-1

HOW TO USE THIS MANUAL

GENERAL

a. All references in this manual are to paragraphs or to another publication.

b. Whenever the male gender is mentioned (i.e., crewman, repairman) in the manual, it also

pertains to females.

INDEXES

This manual is organized for quickly finding needed information. There are several useful indexes.

a. Table of Contents. Is a list of all chapters, sections, and appendixes. Gives page refer-

ences.

b. Nomenclature Cross-Reference List. Gives an alphabetical list of common names used

in the manual and official nomenclature.

c. Malfunction Index. Located just before the troubleshooting table in each maintenance

chapter. Lists the possible malfunctions in order of appearance. References pages of the trouble-

shooting tables.

e. Alphabetical Index. Located at the end of a manual. An extensive subject index for

everything in the manual. Gives page references.

MAINTENANCE PROCEDURES

There are four maintenance chapters: operator, unit, direct support, and general support. The first

three maintenance chapters contain a malfunction index, a troubleshooting table, an initial setup, plusstep-by-step procedures.

(1) Malfunction Index. Describes fault symptoms and locates the applicable troubleshooting

procedure.

(2) Troubleshooting Table. Lists malfunctions, checks, and corrective actions to be taken.

(3) Initial Setup. Lists everything needed in order to do maintenance on one part of the

equipment:

Tools and Special ToolsLists tools needed to perform maintenance.

Materials/PartsLists expendable/durable materials and 100% replaceable parts. Each

material or part is followed by a part number or appendix reference. If more than one part is needed,

the quantity needed precedes the part number or reference.

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TM 9-4940-531-14

Personnel Required Lists the number of personnel needed when more than one person is

required.

ReferencesLists other publications containing necessary information.

Equipment ConditionsLists conditions to be met before starting the procedure. The para-

graph reference at the end of the condition is a reference to instructions for setting up the condition.

(4) Step-By-Step Procedures. Are illustrated instructions for maintenance that is authorized

in the maintenance allocation chart (MAC). For replacement of parts, refer to TM 9-4940-531-24P.

WARNINGS, CAUTIONS, AND NOTES

Throughout the manual is WARNING, CAUTION, and NOTE data which must be followed.

WARNING

A warning is used to alert the user of hazardous operating and maintenance proce-

dures, practices, conditions, statements, etc., that may result in injury to or death ofpersonnel if not strictly observed.

CAUTION

A caution is used to alert the user of hazardous operating or maintenance procedures,

practices, conditions, statements, etc., that may result in damage to or destruction of

equipment or of mission effectiveness if not strictly observed.

NOTE

A note is used to aid in simplifying a task.

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TM 9-4940-531-1

C H A P T E R 1

I N T R O D U C T I O N

CHAPTER INDEX

Paragraph Page

1-1.

1-2.

1-3.

1-4.

1-5.

1-6.

1-7.

1-8.

1-9.

1-10.

1-11.1-12.

1-13.

1-14.

1-15.

1-16.

1-17.

1-18.

1-19.

1-20.

1-21.

1-22.

1-23.1-24.

1-25.

1-26.

1-27.

1-28.

1-29.

1-30.

1-31.

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance Forms and Records . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Destruction of Army Materiel to Prevent Enemy Use... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reporting Equipment Improvement Recommendations (EIRs) . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Nomenclature Cross- Reference List . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Corrosion Prevention and Control (CPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Common Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Tools, TMDE, and Support Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Equipment Characteristics, Capabilities, and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Location and Description of Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety ,Care, and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Water Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adding Detergent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Water Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Automatic Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydraulic Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Thermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Oil BurnerAssembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Steam Cleaning Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blowdown Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Descaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Desooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Temperature Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

1-2

1-2

1-2

1-2

1-2

1-3

1-4

1-4

1-4

1-4

1-4

1-5

1-10

1-10

1-10

1-11

1-13

1-13

1-13

1-14

1-15

1-151-17

1-17

1-18

1-19

1-19

1-19

1-20

1-21

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TM 9-4940-531-14

S e c t i o n I . G E N E R A L I N F O R M A T I O N

1-1. S C O P E

a. Type of Manual. Operators, unit, direct support, and general support maintenance.

b. Model Number and Equipment Name. MIL-C-45996 trailer mounted, high pressure hot and

cold water jet steam cleaner.

c. Purpose of Equipment. Removes dirt, grease, mud, and other foreign matter from ground

support vehicles.

1-2 . MAINTENANCE FORMS AND RECORDS

Department of the Army forms and procedures used for equipment maintenance will be those pre-

scribed by DA PAM 738-750, The Army Maintenance Management System (TAMMS).

1-3. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE

Refer to TM 750-244-7 for procedures for destruction of the steam cleaner.

1 - 4 . A D M I N I S T R A T I V E S T O R A G E

See paragraph 4-29, Administrative Storage.

1-5. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR'S)

If your steam cleaner needs improvement, let us know. Send us an EIR. You, the user, are the only

one who can tell us what you dont like about your equipment. Let us know why you dont like the

design or performance. Put it on a SF 368 (Product Quality Deficiency Report). Mail it to us at U.S.Army Armament, Munitions and Chemical Command, ATTN: AMSMC-QAD, Rock Island, II 61299-

6000. Well send you a reply.

1-6. WARRANTY INFORMATION

Not applicable.

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1-7. NOMENCLATURE CROSS-REFERENCE LIST

Common Name Official Nomenclature

CHEMICAL METERING Valve Assembly

Coil Inlet Hose Assembly

Coil Inlet-to-Differential Pressure Switch Tubing Assembly

Coil Inlet-to-Inlet Pressure Gauge Tubing Assembly

Coil Lid

Coil Outlet-to-Differential Pressure Switch Tubing Assembly

Coil Outlet-to-Outlet Pressure Gauge Tubing Assembly

Coil Outlet-to-Pressure Switch Tubing Assembly

DELlME Light

DRAIN Light

Drain Plug

EMERGENCY OFF Switch

Exhaust Flap

Facility Power Cable Assembly

Fuel Gauge

FUEL PRESSURE gauge

Fuel Pump

Fuel Pump-to-Pressure Gauge Tubing Assembly

Fuel Shutoff Valve

Generator Power Cable Assembly

Heating Coil

Hose Rack Access Door

HOUR METER

INLET PRESSURE GaugeLifting Bracket

Liquid Storage Tank

Locking Pin Assembly

MODE SELECTOR Switch

OPERATING TEMPERATURE Gauge

OUTLET PRESSURE Gauge

POWER Light

Pressure Switch-to-Pressure Switch Tubing Assembly

Pressurized Water Hose Assembly

PUSH TO START Switch

Steam Cleaner

Temperature Control Box

Trailer Mounted Steam Cleaner

Wheel

Valve Assembly, Metering

Hose, Assembly, Nonmetallic

Tubing Assembly

Tubing Assembly

Access Door

Tubing Assembly

Tubing Assembly

Tubing Assembly

Light, Indicator

Light, Indicator

Plug, Pipe

Circuit Breaker

Access Door

Cable Assembly, SpecialPurpose, Electrical

Gage, Liquid Quantity

Gage, Pressure, Dial Indicating

Fuel Control, Main

Tubing Assembly

Cock, Plug

Cable Assembly, Power, Special

Purpose, Electrical

Cooler, Fluid, Industrial

Door, Access

Meter, Totalizing Time

Gage, Pressure DialCover, Access

Bottle, Screw Cap

Chain Assembly, Single Leg

Switch, Rotary

Indicator, Temperature

Gage, Pressure Dial

Light, Indicator

Tubing Assembly

Hose Assembly, Nonmetallic

Switch, Push

Cleaner, Steam, High Pressure,

Hot and Cold Water Jet

Interconnecting Box

Cleaner, Steam, High Pressure,

Hot and Cold Water Jet, Trailer

Mounted.

Caster, Swivel

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TM 9-4940-531-14

1-8. CORROSION PREVENTION AND CONTROL (CPC)

a. Corrosion Prevention and Control (CPC) of Army materiel is a continuing concern. It is imp

tant that any corrosion problems with this item be reported so the problem can be corrected and

improvements can be made to prevent the problem in future items.

b. While corrosion is typically associated with rusting of metals, it can also include deterioration of

other materials such as rubber and plastic. Unusual cracking, softening, swelling, or breaking of these

materials may be a corrosion problem.

c. If a corrosion problem is identified, it can be reported using SF 368, Product Quality Deficiency

Report. Use of keywords such as corrosion", "rust", "deterioration", or "cracking" will ensure that the

information is identified as a CPC problem.

d. The form should be submitted to: Commander, U.S. Army Armament, Munitions and Chemical

Command, ATTN: AMSMC-QAD/Customer Feedback Center, Rock Island, II 61299-6000.

S e c t i o n I l . R E P A I R P A R T S; T O O L S ; S P E C I A L T O O L S ; T E S T ,

M E A S U R E M E N T , A N D D I A G N O S T I C E Q U I P M E N T ( T M D E ) ;

A N D S U P P O R T E Q U I P M E N T

1-9. COMMON TOOLS AND EQUIPMENT

a. For authorized common tools and equipment, refer to the Modified Table of Organization and

Equipment (MTOE), CTA 50-970, or CTA 8-100, as applicable to your unit.

b. The tool kit assigned to the mechanic is Tool Kit, General Mechanics, SC 5180-90-CL-N26.

1-10. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

Special tools/test equipment are listed in appendix B and in TM 9-4940-531-24P.

1-11. REPAIR PARTS

Repair parts for the steam cleaner are listed and illustrated in TM 9-4940-531-24P. For the generator,

refer to TM 5-6115-615-24P. For the trailer, refer to TM 9-2330-202-14&P.

S e c t i o n I l l . E Q U I P ME N T D E SC R I P TI O N A N D D A T A

1-12. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES

a. Character is t ics.

(1) Trai ler-mounted.

(2) Housed inside enclosure and lift assembly.

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b. Capabilities and Features.

(1) Powered by generator set or facility power source.

(2) Uses either pressurized or nonpressurized water source.

(3) Heat-resistant steam cleaning gun assembly.

(4) Delivers high pressure steam and hot or cold water for cleaning.

1-13. L OCATION AND DESCRIPTION OF MAJOR COMPONENTS

WATER INLET ASSEMBLY (1). Located on left side of steam cleaner. Is used with a pressurized

water source.

WATER TANK ASSEMBLY (2). Mounted on top of fuel tank assembly. Stores and regulates inlet

pressurized water flow.

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1-13. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)

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WATER PUMP ASSEMBLY (3). Located on top of fuel tank assembly. Pumps water to coil unit as-

sembly.

MOTOR ASSEMBLY (4). Located beside water pump assembly. Provides power to operate water

pump assembly.

COIL INLET CONTROL ASSEMBLY (5). Situated behind the control box assembly. Controls routing

and flow of water to coil.

CONTROL BOX ASSEMBLY (6). Located in upper left hand corner of steam cleaner above fire extin-

guisher. Contains UPPER CONTROL PANEL ASSEMBLY (7) and LOWER CONTROL PANEL AS-

SEMBLY(8).

OUTLET AND WATER DRAIN ASSEMBLY (9). Located on right front of steam cleaner. Is used with

steam cleaning gun.

LIQUID STORAGE TANK (1O). Mounted on coil unit assembly. Has markings indicating level of clean-

ing solution.

COIL OUTLET ASSEMBLY (11). Located in front of coil unit assembly. Limits system pressure and

controls temperature on the outlet side of coil unit assembly.

OIL BURNER ASSEMBLY (12). Located in front of coil unit assembly. Houses oil burner controls and

fuel igniter. Oil burner control will shut off burner unit if cad cell does not sense a flame.

FUEL SHUTOFF ASSEMBLY (13). Located beside oil burner assembly. Controls fuel supply from fuel

tank assembly to oil burner assembly.

COIL UNIT ASSEMBLY (14). Situated behind the liquid storage tank and oil burner assembly. Allows

pressurized cold water to be heated to high temperature in the steam and hot rinse modes.

FUEL TANK ASSEMBLY (15). Mounted underneath the control box assembly. Stores and provides fue

for oil burner assembly.

FIRE EXTINGUISHER (16). Used to extinguish fires in and around steam cleaner.

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HOSE STORAGE COMPARTMENT (17). Provides a storage area for the steam cleaner hoses, gun,

and nozzles.

WASH HOSE ASSEMBLY (18). Connects steam cleaning gun to steam cleaner.

STEAM CLEANING GUN (19). Attaches to wash hose assembly. Hand-held control for directing the

steam/water.

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NOZZLES (20). Located in hose storage compartment. Attach to steam cleaning gun. Five different

nozzles consisting of three spray nozzles for hot or cold water and two fan nozzles for steam.

SUCTION HOSE ASSEMBLY (21). Connects nonpressurized water source to steam cleaner.

PRESSURIZED WATER HOSE ASSEMBLY (22). Connects pressurized water source to steam

cleaner.

FACILITY POWER CABLE ASSEMBLY (23). Connects steam cleaner to facility power source.

GENERATOR POWER CABLE ASSEMBLY (24). Connects generator set to steam cleaner.

FLAT BED TRAILER (25). Transports steam cleaner and generator set. Has a leveling-support jackand a rear stabilizer kit.

GENERATOR SET (26). Mounted on flatbed trailer in front of steam cleaner. Provides power to steam

cleaner when facility power is not available.

ENCLOSURE AND LIFT ASSEMBLY (27). Houses steam cleaner unit and provides an attachment

point for hoisting steam cleaner from trailer for maintenance.

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1-14. EQUIPMENT DATA

Capacity:

Steam 200 gph (757 Iph) 200 psi (1379 kPa) 325F(163C)

Hot water 240 gph (908 Iph) 400 psi (2758 kPa) 190F(88C)

Cold water 240 gph (908 Iph) 400 psi (2758 kPa) ambient

Weight:

Steam cleaner, wet

Steam cleaner, dry

Generator, wet

Generator, dry

Trailer

Main wheel load/

Iunette,wet

Main wheel load/

Iunette, dry

Main wheel load/caster, wet

Main wheel load/

caster, dry

Lunette load, wet

Lunette load, dry

Caster wheel load, wet

Caster wheel load, dry

Total weight, wet

Total weight, dry

U.S. CUSTOMARY

1365 lb

1185 lb

600 lb

585 lb

1050 lb

2830 lb

2616 lb

2680 lb

2449 lb

185 lb

204 lb

335 lb

371 lb

3015 lb

2820 lb

METRIC

619.16 kg

537.52 kg

272.16 kg

265.36 kg

476.28 kg

1283.69 kg

1186.62 kg

1215.65 kg

1110.87 kg

83.92 kg

92.53 kg

151.96 kg

168.29 kg

1367.60 kg

1279.15 kg

1-15. SAFETY, CARE, AND HANDLING

To ensure safety, read the warning page at the front of this manual carefully. It lists all warnings

found in this manual. Also, the warnings and cautions will be found in the text preceding the steps

where special attention and care must be taken.

S e c t i o n I I I . P R I NC I P L E S O F O P ER A T I O N

1 - 1 6 . G E N E R A L

a. In many situations, ordinary cleaning methods are insufficient to remove greases, oils, caked-

on dirt, etc., especially in confined areas. Standard water main pressure (usually 25 to 125 psi (172 to

862 kPa)) is not high enough, and there is no way to meter a measured amount of detergent into the

water stream. In addition, there must be some way to continuously heat large amounts of water (200

gph or greater) to a temperature of 200F (93 C) or greater.

b. The operation of the steam cleaner is explained in paragraphs 1-17 through 1-31. Refer to figure

FO-2 at the back of this manual for electrical schematic.

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1-17. WATER SOURCES

a. Shop Outlet. Water is delivered to the pressurized water inlet assembly from an ordinary cold

water supply line and then to the water tank, which acts as a reservoir. The water level in the water

tank is regulated by the S4 liquid level (float) switch (1) and the 9SOL solenoid valve (2). When the

water level drops below a certain point, S4 is actuated. This causes the 9SOL solenoid valve to open,

and water is delivered to the tank. When the water level approaches full, the float opens the switch,

cutting off current to the solenoid valve. The valve then closes, cutting off the water flow. The water

pump assembly then draws water from the water tank through a strainer (3), which traps any dirt, rust,

or scale. Opening ball valve A (4) selects the pressurized water inlet.

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1-17. WATER SOURCES (cont)

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1-17. WATER SOURCES (cont)

b. Auxiliary Source. Water also can be drawn from a lake, pond, or stream by using the suction

hose assembly. The end of the suction hose that is immersed in water is fitted with a combination

strainer and foot valve. The strainer prevents coarse sand and debris from entering the suction hose.

The foot valve acts as an anti-siphon device to prevent backflow of water through the suction hose

when the steam cleaner is turned off. Another strainer (Y-strainer) (5) traps the finer dirt and debris

which might otherwise enter the water circuit. This strainer can be serviced by disassembling and

cleaning. Closing ball valve A (4) selects the nonpressurized (suction) water inlet mode.

1-18. A DDING DETERGENT

The effectiveness of steam cleaning is enhanced by adding a small amount of cleaning compound

(detergent) to the water intake. The liquid storage tank (6) holds a supply of such detergent, which is

metered into the water intake by the CHEMICAL METERING valve (7). A knob on the front panel

controls the valve and allows the operator to adjust the amount of detergent depending upon the

situation. The cleaning compound should be used sparingly. Since chemical action is greater at

higher temperatures, the chemical is ordinarily used in the steam and hot water modes, not in the coldwater mode.

1-19. WATER PUMP ASSEMBLY

The triple piston water pump assembly (8) (powered by a 2-HP, 208-volt, single-phase electric motor

(9)) builds the water pressure up to 200-300 psi (1379-2069 kPa). The pump works much like an air

compressor but is designed to pump water.

1-20. A UTOMATIC DRAINING

a. Many steam cleaners are damaged by being stored outside during subfreezing weather. The

water remaining behind in the pump, heating coil, and lines freezes, and the resulting expansion can

damage these components. To safeguard against this, the steam cleaner has an automatic draining

system to allow water to drain completely when the steam cleaner is turned off from the steam/

blowdown mode.

b. There are three drain solenoid valves. The first (1SOL) solenoid (10) is located at the inlet side

of the pump, the second (3SOL) solenoid (11) at the inlet side of the heating coil, and the third (4SOL)

solenoid (12) at the outlet side of the heating coil. These valves are normally open. When the steam

cleaner is turned on, the valves close. When the steam cleaner is turned off, the valves open, permit-

ting water to drain from the heating coil and water lines. In addition, there are two vent valves(13)

which aid in draining by allowing air to enter the water circuit to replace the water as it drains out.

These are one-way check valves which open at 0.5 psi (3.45 kPa). During pump operation, the waterpressurization forces these valves closed.

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1-21. B YPASS MODE

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TM 9-4940-531-1

1-21. BYPASS MODE (cont)

a. Whenever the steam cleaner is on, the water pump assembly is operating. If the steam cleaning

gun valve is not actuated, the water continues to circulate from the pump outlet back to the pump inlet.

This process is called the bypass mode of operation. The pumping of water around this closed loop

causes churning of the water which results in a temperature buildup. However, the steam cleaner is

designed to limit the temperature of the water in the bypass loop to 190 F (88 C).

b. The bypass system consists of 5SOL solenoid valve (14) and PS5 pressure switch (15). When

the pressure at the pump outlet exceeds 150 psi (1034 kPa), the PS5 pressure switch opens and de-

energizes the 5SOL solenoid valve. The valve thus opens and bypasses the water pump. In the

same way, when the pressure drops below 150 psi (1034 kPa), the switch closes, energizing the

solenoid valve and causing it to close, thus unbypassing the pump. The solenoid valve is de-ener-

gized during the blowdown cycle so that the pump remains bypassed.

c. If for any reason the pump outlet pressure exceeds 500 psi (3448 kPa), the regulating valve

(16) automatically opens and bypasses the pump to prevent any further pressure buildup.

d. In the steam mode, 6SOL solenoid valve (17) at the water pump outlet is energized, placing

the regulating valve (18) in the circuit. This is a normally-closed, self-actuated valve which opens at

300 psi (2069 kPa) or greater pressure. The purpose of this valve is to establish a working pressure

not to exceed 300 psi (2069 kPa) in the steam mode.

1-22. HY D R A U LIC A C C U M U LA T O R

The hydraulic accumulator (19) is located near the water pump outlet and acts as a hydraulic shock

absorber to smooth out the pressure pulsations produced by the water pump assembly.

1-23. HEATING COIL

a. Pressurized water flows through heating coil unit assembly (20) where the water is heated by

the hot combustion gases from the atomizing, vaporizing oil burner (21). The coil is not made using

the cold-water wrap technique used in commercial steam cleaners. Instead, the water flow enters at

the top of the coil unit assembly and emerges near the bottom in one straight pass. The diameter of

the coil spiral decreases and increases along the coil from top to bottom. This prevents the coil from

doubling back on itself. Such a design allows the heating coil to drain itself of water by gravity, thus

preventing the coil from retaining water which could later freeze up in cold temperature conditions.

b. The two 0-1000 psi (0-6895 kPa) pressure gauges (22 and 23) measure the pressure at the

inlet and outlet sides of the heating coil.

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1-23. HEATING COIL (cont)

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1-23. HEATING COIL (cont)

The pressure drop (difference between the two gauge readings) across the heating coil indicates to

what extent it is clogged with rust and scale. The greater the pressure difference, the more the rust/

scale buildup. The heating coil should be descaled when the DELlME light illuminates.

c. A similar function is performed by the PS3 differential pressure switch (24). One side of the

switch is connected to the coil inlet, the other side to the coil outlet. When the pressure difference

exceeds 70 psi (483 kPa), the switch closes and illuminates the DELlME light.

1 - 2 4 . T H E R M O C O U P L E

The thermocouple (25) is a bimetallic temperature sensing device which is installed directy in the water

outlet line. As fluid temperature rises, the DC voltage produced by the thermocouple rises in proportion

and registers as a specific reading at the OPERATING TEMPERATURE gauge on the control panel.

Cooler temperatures produce lower readings.

1-25. OIL BURNER ASSEMBLY

The oil burner assembly used in the steam cleaner is similar to the kind used in oil furnaces but is

calibrated to burn diesel fuel. The oil burner consists of four major systems: fuel, air, ignition, and

control.

(a) Fuel System. Fuel is drawn from the fuel tank (26) and through a strainer (27) by an electric

motor-driven fuel pump (28). This pump also pressurizes the fuel and delivers it to a nozzle. Fuel

pressure is indicated by the FUEL PRESSURE gauge (29) on the front panel of the steam cleaner. The

nozzle contains a fine orifice to atomize the fuel so that it will vaporize. There is also a fuel return line

(30) that returns any fuel bypassed (not flowing through the nozzle) to the fuel tank. There are shutoff

valves (31) for the fuel lines. A gauge (32) indicates the amount of fuel in the tank.

(b) Air System. Air is drawn in through air bands by an electric motor-driven blower which is

driven by the same motor that drives the fuel pump. The air bands are adjustable so that proper air/

fuel vapor ratio may be obtained. The blower feeds into an air tube. Near the exit end of the air tube

is an air tube cone to speed up the airflow and a deflector (whirler) to make the air stream rotate, or

swirl, for maximum vaporization. At the exit of the air tube, the atomized fuel vaporizes and mixes with

the air, forming a combustible mixture.

(c) Ignition System. The ignition system consists of the ignition (high voltage) transformer (T2,

fig. FO-2) and a pair of insulated electrodes. The electrodes form a spark gap. The continuous spark

formed at the spark gap ignites the fuel vapor/air mixture.

(d) Control System. The control system consists of an electric controller which can turn the

burner motor and ignition transformer on and off. The controller is actuated by the cad cell, by safety

and temperature regulating switches, and by the temperature control box. See paragraphs 1-30 and

1-31 for additional information.

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1-26. STEAM CLEANING GUN

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1-26. STEAM CLEANING GUN (cont)

a. Pressurized water from the coil outlet goes to the steam cleaning gun (33). A trigger-controlled

valve on the cleaning gun handle turns the gun on and off. Different kinds of nozzles can be fitted

depending on the situation. The standard nozzles are used when a forceful stream of water or steam

is wanted. The fan-type nozzle is used in the steam mode when less force is wanted over a broader

area.

b. It should be noted that in the steam mode, there is not actually steam going through the clean-

ing gun, but superheated water. The water temperature is approximately 315F (157C), which is

well above the boiling point of water. The high water pressure (approximately 200 psi (1379 kPa))

prevents the water in the gun from turning into steam. However, when the superheated water is

discharged through the orifice in the cleaning gun nozzle, its pressure suddenly drops towards normal

atmospheric pressure, causing it to flash (rapidly boil) into saturated (wet) steam coming from the

nozzle.

1-27. B LOWDOWN CYCLE

a. During steam cleaner operation, lime (calcium deposits) and rust can form on the inside of the

heating coil. The buildup (scale) reduces the efficiency of the steam cleaner by reducing the heat

transfer from combustion gases to the water circulating through the coil. In addition, the water pump

has to work harder to force water through the coil. These deposits, if not removed, can eventually

clog the heating coil passages. The buildup is indicated by a 70 psi (483 kPa) or greater pressure

difference and /or that the DELlME light is on. The blowdown cycle helps to reduce these buildups.

b. During the blowdown cycle, the water pump is bypassed, but the oil burner continues to run.

This heats the water in the heating coil until it becomes superheated and flashes (boils rapidly) into

steam. The resulting violent action (vibration and sudden blasts of steam) loosens the buildup of

scale within the heating coil. The check valve (34) prevents any backflow of water toward the pump

under these conditions. When operating in steam mode only, blowdown is initialized every time thesteam cleaner is turned off. When the MODE SELECTOR switch is placed in OFF position, the S5 flow

switch actuates the flow regulating valve (35), letting steam discharge through the blowdown port under

the steam cleaner. This phase of the cycle lasts about 127 seconds. After this, the burner is shut down

and water is pumped through the heating coil for about 88 seconds to flush out any loose rust or scale.

1-28. DE S C A LIN G

In spite of repeated blowdown cycles, a certain amount of scale will continue to build up inside the

heating coil. In this case, chemical action (descaling) is called for. A solution of water and scale

removing compound, which chemically dissolves the scale buildup, is circulated through the coil.

Descaling procedures are given in paragraph 5-23. Under average conditions, the cleaner will have to

be descaled about every 100 hours of operation. The actual time is determined by the hardness of thelocal water supply.

1-29. DESOOTING

In addition to scale buildup on the inside of the heating coil tubing, soot (a byproduct of diesel fuel

combustion) can accumulate on the outside of the heating coil tubing. Soot has the same effect on

efficiency as scale; it reduces the heat transfer from the hot combustion gases to the heating coil.

Desooting procedures are given in table 4-1.

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1-30. SAFETY DEVICES

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1-30. SAFETY DEVICES (cont)

a. The cad cell is a photoelectric cell which watches for a flame from the oil burner. If there is no

flame after the burner starts up, or if there is a flameout during operation, the cad cell signals the electric

controller to shutdown the oil burner.

b. Regulating valve (16) is a pressure relief valve that opens at 500 psi (3448 kPa), bypassing the

water pump assembly. This valve limits the absolute maximum coil inlet pressure to 500 psi (3448

kPa).

c. Regulating valve (36) is a pressure relief valve that opens at 600 psi (4137 kPa) at the coil

outlet. It limits the absolute maximum coil outlet pressure to 600 psi (4137 kPa).

d. Regulating valve (37) is a pressure relief valve that opens at 400 psi (2758 kPa) at the coil

outlet. It limits the pressure to 400 psi (2758 kPa) in the steam mode only.

e. FS1 flow switch (38) is normally closed when there is a flow through the switch of 1.5 gpm

(5.68 lpm) or greater. At flow rates under 1.5 gpm (5.68 Ipm) the switch opens, cutting off fuel controlrelay 2CR (fig. FO-2). This interrupts fuel delivery to the oil burner. This safeguard prevents contin-

ued heating of the water in the heating coil when there is little or no water flow through it. Otherwise,

rapid boiling and the production of potentially dangerous superheated (dry) steam could occur.

f. Pressure switches (39) and (40) shut down the oil burner if the coil outlet pressure exceeds

established limits. PS1 pressure switch (39) is activated when the MODE SELECTOR switch is in

STEAM position; this switch opens if pressure exceeds 400 psi (2758 kPa), which shuts down the oil

burner. The PS2 pressure switch (40) is activated when the MODE SELECTOR switch is in HOT or

COLD position; this switch opens if pressure exceeds 600 psi (4137 kPa), which shuts down the oil

burner.

1-31. TEMPERATURE CONTROL BOX

a. Ho t Water Mode. Temperature control box (41) maintains the hot water temperature at 200 to

220F (93 to 104C) by cycling the oil burner on and off. If temperature reaches 225F (107 C), the

HOT WATER ALARM lights and C1 circuit breaker trips.

b. Steam Mode. Temperature control box (41) maintains the steam mode temperature at 335 to

340F (168 to 171C) by cycling the oil burner on and off. If temperature reaches 355F (179 C), the

STEAM ALARM lights and C1 circuit breaker trips.

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C H A P T E R 2

O P E R A T I N G I N S T R U C TI O N S

CHAPTER INDEX

2-1.

2-2.

2-3.

2-4.

2-5.

2-6.

2-7.

2-8.

2-9.

2-10.

2-11.

Controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PMCS Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Leakage Definitions for Operator PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Decals and Instruction Plates . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation in Cold Weather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation in Dirt, Dust, Mud, or Sandy Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation in Wet Weather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation in Hot and Humid Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .

Section I. DESCRIPTION AND USE OF OPERATORSCONTROLS AND INDICATORS

2-1. CONTROLS AND INDICATORS

Key

1

2

Control or

Indicator

PUSH TO START

Switch

EMERGENCY OFF

Circuit Breaker

Page

2-1

2-9

2-10

2-11

2-21

2-31

2-38

2-41

2-41

2-41

2-41

Function

Starts steam cleaner.

Automatically shuts off power in case of electrical

overload. Must be reset manually. Also can be turned off

manually in an emergency.

2-1


36/447

TM 9-4940-531-14

2-1 . CONTROLS AND INDICATORS (cont )

Key

3

4

5

6

7

Control or

Indicator

MODE SELECTOR

Rotary Switch

DELlME LIGHT

POWER LIGHT

DRAIN LIGHT

HOT WATER ALARMLight

Function

Selects desired operating mode (STEAM, OFF, COLD,

HOT).

Indicates inlet and outlet pressure difference has

exceeded 70 psi (483 kPa).

Indicates main power is on.

Indicates steam cleaner is in drain cycle.

Indicates temperature in hot water mode is220F (104C) or pressure is 600 psi (4137 kPa).

2 - 2


37/447

TM 9-4940-531-1

8

9

10

11

12

13

Key

Control or

Indicator

STEAM ALARM Light

HOUR METER

OPERATING TEM-PERATURE Gauge

FUEL PRESSURE

Gauge

CHEMICAL METERINGValve

CIRCUIT BREAKER

Pushbutton

Function

Indicates temperature in steam mode is 350F (177C)

or pressure is 400 psi (2758 kPa).

Indicates total hours of operation.

Provides water temperature reading after water

leaves coil unit assembly.

Measures fuel pressure at inlet of oil burner

assembly.

Controls flow rate of cleaning solution in use.

Indicates oil burner circuit breaker has opened and per-

mits manual reset.

2-3


38/447

TM 9-4940-531-14

2-1. CONTROLS AND INDICATORS (cont)

Control or

Key Indicator Function

14 INLET PRESSURE Measures water pressure at inlet side of coil unitGauge assembly.

15 OUTLET PRESSURE Measures water pressure at outlet side of coil unit

Gauge assembly.

2 - 4


39/447

TM 9-4940-531-

Key

16

17

Control or

Indicator

Oil Burner Motor

Thermal Overload

Switch

Oil Burner

Electromagnet

Relay Reset Button

Function

Protects oil burner motor from overloads.

Resets oil burner electromagnet relay.

2 -


40/447

TM 9-4940-531-14


Key

18

19

Control or

Indicator

Fuel Gauge

Quick Disconnect Cap

Function

Indicates amount of fuel in fuel tank.

Covers the suction inlet. Is removed when suction hose

assembly is used for drawing water from a nonpres-

surized water source.

2 - 6


41/447

TM 9-4940-531-

Key

20

21

22

Control or

Indicator

Fuel Tank

Shutoff Valve

Oil Burner Fuel

Shutoff Valve

Ball Valve

Function

Controls fuel flow from oil burner assembly to fuel

tank.

Controls fuel flow from fuel tank to oil burner

assembly.

Controls water entering pump from water tank assembly.

2-7


42/447

TM 9-4940-531-14


Key

23

24

25

26

27

28

Control or

Indicator

Steam Cleaning Gun

Trigger

Spray Nozzle

High Pressure Nozzle

Wide Spray Nozzle

Small Fan Nozzle

Large Fan Nozzle

Function

Controls flow of water or steam.

Emits pinpoint spray of hot or cold water.

Emits high pressure spray (fog) of hot or cold water.

Emits wide spray of hot or cold water.

Emits narrow flow of steam.

Emits wide flow of steam.

2 - 8


43/447

TM 9-4940-531-1

Control or

Key Indicator Function

29 Leveling-Support Jack Raises and lowers leveling-support jack.

Crank Handle

S e c t i o n I I . O P E R A T O R P R E V E N T I V E M A I N T E N A N C E C H E C K S

A N D S E R V I C E S ( P M C S )

2 - 2 . P M C S P R O C E D U R E S

a. General. Preventive Maintenance Checks and Services (PMCS) means systematic caring,

inspecting, and servicing of the steam cleaner to keep it in good condition and to prevent breakdowns

b. Do your BEFORE PMCS just before you operate the steam cleaner. Pay attention to WARN-

INGS, CAUTIONS, and NOTES.

c. Do your DURING PMCS while you operate the steam cleaner. Pay attention to WARNINGS,

CAUTIONS, and NOTES.

d. Do your AFTER PMCS right after operating the steam cleaner. Pay attention to WARNINGS,

CAUTIONS, and NOTES.

e. Do your WEEKLY PMCS once a week.

2


44/447

TM 9-4940-531-14

2-2 . PMCS PROCEDURES (cont )

f. Item No. Column. Checks and services are numbered in chronological order regardless of

interval. This column is used as an item number source for the TM Item Number column on DA Form

2404 when recording PMCS results.

g. Interval Column. This column tells you when you must do the checks and services; eitherbefore, during, or after.

h. Location, Item To Check/Service Column. This column contains the name of the item(s) to

be checked or serviced.

i. Procedure Column. This column tells you how to do the required checks or services.

NOTE

The terms ready/available and mission capable refer to the same status: equipment is

on hand and is able to perform its combat missions.

j. Not Fully Mission Capable If: Column. This column identifies the faults of the equipment

that will prevent the steam cleaner from being fully mission capable.

2-10

2 - 3 . C L E A N I N G A G E N TS

WARNING

DO NOT use diesel fuel, gasoline, or benzene (benzol) for cleaning. Use only ap-

proved cleaning solvents to avoid the possibility of fire or poisoning. Prolonged breath-

ing of fuel vapors can be fatal.

DO NOT SMOKE when using cleaning solvent. NEVER USE IT NEAR AN OPEN

FLAME. Be sure there is a fire extinguisher nearby and use cleaning solvent only in

well-ventilated places. Flash point of solvent is 138F (59C). Severe burns or deathcould result.

USE CAUTION when using dry cleaning solvent (item 22, appx E). Cleaning solvents

evaporate quickly and can irritate exposed skin on contact. In cold weather, contact of

exposed skin with cleaning solvent can cause frostbite.

CAUTION

Steam cleaner must be COLD (same temperature as outside air) when using cleaning

solvent. DO NOT point water or steam directly at any electrical connection. Damage to

electrical system may result.

Keep cleaning solvents, gasoline, and lubricants away from rubber or soft plastic parts.They will deteriorate material.

NOTE

Only use those authorized cleaning solvents or agents listed in Appendix E.


45/447

TM 9-4940-531-

a. Cleaning Electrical Connections. Use denatured alcohol (item 2,appx E) on clean wiping

rag (item 18, appx E) to clean terminals.

b. Cleaning Rust or Grease. When cleaning grease buildup or rusty places, use dry cleaning

solvent (item 22, appx E). Then apply a thin coat of light oil (item 15, appx E) to affected

area.

2-4. LEAKAGE DEFINITIONS FOR OPERATOR PMCS

It is necessary for you to know how fluid leakage affects the status of the steam cleaner. Following

are types/classes of leakage an operator needs to know to be able to determine the status of the

steam cleaner. Learn these leakage definitions and remember--when in doubt, notify your supervisor

CAUTION

Equipment operation is allowable with minor leakage (Class I or II). Of course, consid-

eration must be given to fluid capacity in the item/system being checked/inspected.

When in doubt, notify your supervisor.

When operating with Class I or II leaks, continue to check fluid levels as required in

your PMCS.

Class Ill leaks should be reported immediately to your supervisor.

a. CLASS I - See page of fluid (as indicated by wetness or discoloration) not great enough to form

drops.

b. CLASS II - Leakage of fluid great enough to form drops but not enough to cause drops to drip

from item being checked/inspected.

c. CLASS Ill - Leakage of fluid great enough to form drops that fall from item being checked/inspected.

2-1


46/447

TM 9-4940-531-14

Table 2-1. Operators Preventive Maintenance Checks and Services

Item

No.

Location Not Fully

Item to Mission

Check/ Capable

Interval Service Procedures If:

1

2

3

2-12

Before

Before

Before

Electrical Cable

Assemblies

V-belts (1)

Hoses

Check for worn or dam-

aged insulation and loose

or broken connections.

Check for signs ofimpending failure, such

as fraying, cracks, or cuts.

Push down on belts to

check for tension.

Check for loose, dam-

aged, or missing hoses.

Electrical cables have

worn or damaged

insulation or if connec-

tions are open.

V-belts are loose orshow signs of impend-

ing failure.

Hoses are loose, dam-

aged, or missing.


47/447

TM 9-4940-53

Item

No.

4

5

6

7

8

9

Table 2-1. Operators Preventive Maintenance Checks and Services (cont)

Interval

Before

Before

Before

Before

Before

Before

Location

Item to

Check/

Service

Fuel TankAssembly

Liquid Storage

Tank (3)

Fire Extinguisher

(4)

Procedures

Check for fuel leaks.Check fuel gauge (2) and

add fuel (para 2-5) as

required.

Check and add cleaning

solution (para 2-5) as

required.

Check that fire extinguish-

er is present.

Leveling

Support Jack (5)

and Rear Stabi-

lizer (6)

Generator Set

Flat Bed

Trailer

Check that leveling

support jack and rear

stabilizer are not bent,

broken, or inoperable.

Check that pneumatic

tire has 35 pounds

(241 kPa) of pressure.

Refer to TM 5-6115-615-12 for applicable

Before PMCS.

Refer to TM 9-2330-202-

14&P for applicable

Before PMCS.

Not Fully

Mission

Capable

If:

Fuel leakage of anykind. There is insuffi-

cient fuel to perform

all required cleaning

tasks.

There is insufficient

cleaning solution to

perform all required

cleaning tasks.

Fire extinguisher

is missing.

Leveling support jack

and/or rear stabilizer

are bent, broken, or

inoperable. If pneu-

matic tire is underin-

flated.

2-1


48/447

TM 9-4940-531-14


Location Not Fully

Item to Mission

Item Check/ Capable

No. Interval Serv ice Procedures If:

2-14


49/447

TM 9-4940-531-1

Item

No.

10

11

12

13

14


Interval

During

During

During

During

During

Location

Item to

Check/

Service

Wash Hose

Assembly (7),

Pressurized

Water Hose

Assembly (8),

and Suction HOS E

Assembly (9)

Steam Cleaning

Gun (10) and

Nozzles.

Water Tank

Assembly (11).

Fuel Tank and

Lines

Water Lines,

Valves, Connec-tions, and Water

Pump

Procedures

Check for leakage (some

water dripping is normal).

Tighten any loose con-

nections. Clean Y-strainer

and foot valve on suction

hose assembly (para 3-6)

as required. When draw-

ing from a turbid (unclear)

water source, check Y-

strainer and foot valve of

suction hose assembly(para 3-6) every 4 hours

of operation and clean as

necessary.

Check for leaks, irregular

spray pattern, and proper

on/off operation.

Check that when ballvalve (12) is opened,

water tank fills but does

not overflow.

If fuel tank and/or lines

have any fuel seepage,

shut down the steam

cleaner and notify unit

maintenance.

Check all water lines,

valves, connections, andwater pump for water

leakage. (Some water

dripping is normal.)

Not Fully

Mission

Capable

If:

Any hose assemblies

are missing or leaking

excessively, or if Y-

strainer or foot valve

is clogged.

Steam cleaning gun

is leaking or does not

show normal on/off

operation, or nozzles

are producing an

irreguIar spray pattern.

Water tank does not

begin filling when ball

valve is opened, or if

tank overflows at any

time.

There is any fuel

seepage.

There is excessive

leakage or any missinghoses.

2-1


50/447

TM 9-4940-531-14

Item

No.


Interval

Location Not Fully

Item to Mission

Check/ Capable

ServiceProcedures If:

15

16

17

2-16

During

During

During

Oil Drain Line

(13)

Water Pump

Assembly (14)

Coil Exhaust

Opening (15)

Check fittings and line for

leakage.

If water pump assembly

has class Ill oil leakage,

shut down steam cleaner

and notify unit mainte-

nance.

Observe if exhaust con-

tains black smoke after

steam cleaner has

reached operating tem-

perature. If so, shut down

steam cleaner and notify

unit maintenance.

There are Class Ill oil

leaks.

There is class III leak-

age of oil from the

water pump.

There is black smoke

coming from exhaust

opening after warmup

period.


51/447

TM 9-4940-531-1

Item

No.


Location

Item to

Check/

Interval Serv ice Procedures

18

19

20

During

During

During

OPERATING

TEMPERATURE

Gauge (16)

HOUR METER

(17)

Indicator Lights

(18)

Not Fully

Mission

Capable

If:

Check that OPERATING

TEMPERATURE gaugereads 180 to 200F (82 to

93C) for HOT water

mode and 315 to 335F

(157 to 168C) for

STEAM mode.

Check that HOUR

METER is working.

Check that correct indica-

tor light illuminates at the

proper time during the

indicated function. If

DELlME LIGHT, HOT

WATER ALARM light, or

STEAM ALARM light il-

luminates, shut down


unit maintenance.

OPERATING TEM-

PERATURE gauge isinoperative or erratic.

Hour meter is not

working.

Indicator lights do not

function properly or if

DELlME LIGHT, HOT

WATER ALARM light,

or STEAM ALARM light

is on.

2-17


52/447

TM 9-4940-531-14


Location Not Fully

Item to Mission

Item Check/ Capable

No. Interval Service Procedures If:

During

During

During

INLET PRES-

SURE Gauge

(19) and OUTLET

PRESSURE

Gauge (20)

FUELPRESSURE

Gauge (21)

CHEMICAL

METERING

Valve (22)

Check for pressure indica-

tion when water pump is

on. If inlet and outlet

pressure difference

causes DELlME LIGHT

to illuminate, shut down


unit maintenance.

Check that gauge indi-cates between 90 and

110 psi (621 and 758 kPa

when oil burner is on.

Check that valve is not

stuck, operates smoothly,

and meters chemical into

the water stream.

Gauges are inopera-

tive or erratic, or if

DELlME LIGHT illu-

minates.

Gauge is inoperativeor erratic.

CHEMICAL METERING

valve is stuck or does

not operate properly.

2-18


53/447

TM 9-4940-531-1

Item

No.

24

25

26

27


Location

Item to

Check/

Interval Service

During Generator Set

During

After

After

Flat Bed Trailer

Procedures

Refer to TM 5-6115-615-

12 for applicable During

PMCS.

Refer to TM 9-2330-202-

14&P for applicable

During PMCS.

Not Fully

Mission

Capable

If:

Leveling Support

Jack (5) and

Rear Stabilizer

(6)

Hoses

Check that leveling sup-

port jack and rear stabi-

lizer are not bent, broken

or inoperative. Check

that pneumatic tire has

35 pounds (241 kPa) of

pressure.

Check for loose, dam-

aged, or missing hoses.

Leveling support jack

and/or rear stabilizer

are bent, broken, or

inoperable; or if pneu-

matic tire is under-

inflated.

Hoses are loose, dam-

aged, or missing.

2-1


54/447

para 3-5

TM 9-2330-202-14&P

TM 5-6115-615-12

TM 9-4940-531-14


2-20


55/447

TM 9-4940-531-

S e c t i o n I l l . O P E R A T I ON U N D ER U S U A L C O N D I T I ON S

2-5. PREPARATION FOR USE

WARNING

Do not install steam cleaner in areas containing flammable material or gases. Severeinjury or death from fire or fumes may result.

Install steam cleaner in properly ventilated areas to avoid possible insufficient supply of

oxygen. If poorly-vented area is a necessity, outside air may be piped to oil burner

assembly and a fan may be installed to bring fresh air into the area.

For inside installation, use exhaust stack to prevent fumes from collecting inside build-

ing. Minimum exhaust stack is 10 inches (25.40 cm). Exhaust stack must be warm for

sufficient draw; in cold areas of operation, exhaust stack should be insulated. Cold

exhaust stack invites downdraft. Severe injury or death could result if exhaust is not

vented.

Items to be cleaned should be approximately 12 feet (3.66 m) from steam cleaner to

avoid direct spray of steam cleaning gun coming into contact with steam cleaner.

Excess moisture reaching generator and electrical controls will reduce life of steam

cleaner unit and components and may cause shorts which may result in electrical

shock.

Diesel fuel is FLAMMABLE; DO NOT smoke in vicinity while performing servicing

operations. Severe injury or death may result.

Ensure generator is properly grounded before operating steam cleaner to avoid electri-

cal shock.

CAUTIONIncoming power supply must be 208 VAC 10%, 50/60 Hz, single phase; otherwise,

equipment damage can result.

2-2


56/447

TM 9-4940-531-14

2-5 . P R E P A R A T IO N F O R U S E (con t )

a. Installation Site Precautions.

(1) Steam cleaner should be located on

a level surface with consideration given to

accessibility for filling of cleaning solution and

fuel oil. Location for electricity, water connec-

tions, and maintenance should also be consid-

ered. If generator set will be used, ground

generator set before operation. Refer to TM 5-

6115-615-12.

(2) Ensure steam cleaner is properly

stabilized before operating. Turn leveling-

support jack crank handle (1) clockwise to raise

flat bed trailer (2) and disengage it from towing

vehicle. Turn leveling-support jack crank handle(1) counterclockwise to lower and stabilize the

flat bed trailer (2).

(3) Go to the opposite end of flat bed trailer (2). Lift handle (3) to release rear stabilizer (4)

from the travel position. Turn base of leg assembly (5) as necessary to adjust height of rear stabilizer

(4) to ensure solid contact with the ground while in the locked position.

(4) When using commercial power source, steam cleaner should be wired to a fused- or

breaker-protected electrical grounded circuit or outlet of at least 20 amp capacity.

2-22


57/447

TM 9-4940-531-1

b. Initial Checks and Services.

NOTEFor initial checks and services of generator set, refer to TM 5-6115-615-12. For initial

checks and services of flat bed trailer, refer to TM 9-2330-202-14&P.

(1) Check fuel gauge (1). If necessary, remove fuel tank cap (2) and add proper grade of

diesel fuel. Use grade 1 (item 10, appx E) at 32F (0 C) and below; use grade 2 (item 11, appx E)

above 32F (0 C).

2-2


58/447

TM 9-4940-531-14

2 -5 . P R E P A R A T IO N F O R U S E (con t )

b. Init ial Checks and Services. (cont)

(2) Open fuel shutoff valves (3 and 4).

(3) Check that float (5) in water tank assembly (6) operates freely.

(4) Check all fuel lines for loose connections and leaks.

2-24


59/447

TM 9-4940-531-

Ensure liquid storage tank is positioned as shown.

(5) Remove webbing strap (7) and liquid storage tank (8). Remove cap (9) and fill liquid

storage tank with cleaning compound (item 7, appx E). Reinstall liquid storage tank and webbing

strap.

(6) Using cross-tip screwdriver, remove access cover (10). Using flashlight, check oil level in

water pump assembly (11). Add oil (item 14, appx E) as required.

2-2


60/447

TM 9-4940-531-14

2-5. PREPARATION FOR USE (cont)

b. Initial Checks and Services. (cont)

When using generator power, observe correct hookup of cable to prevent damage to

equipment.

(7) If using commercial power, connect facility power cable assembly (12) to commercial

power source. If using generator power, ensure that generator power cable assembly (13) is con-

nected to generator terminals (14). Refer to TM 5-6115-615-12.

(8) Attach wash hose assembly (15) to steam cleaner pipe coupling (16) and attach steam

cleaning gun (17). Do not attach a nozzle when performing the Initial Start Up procedures in para-

graph c., following.

2-26


61/447

TM 9-4940-531-

c. Initial Start Up. The following steps provide steam cleaner initial starting procedures.

WARNING

Always use ear protection. During operation, the generator set exceeds permissible

decibel levels. The steam cleaner also exceeds permissible decibel levels during

operation in the steam mode and during blowdown. Failure to observe this warning

could result in permanent hearing injury.

Wear safety goggles/glasses and gloves to prevent injury when operating the steam

cleaner in any mode.

CAUTION

Do not use the steam cleaner in any mode on surfaces having a petroleum-based

undercoating. Otherwise erosion/removal of such undercoating can result.

NOTE

Read through operating procedures prior to operation.

(1) If steam cleaner is to be operated from a pressurized water source, perform the following

steps:

(a)

(b)

cleaner.

Open exhaust flap (1).

Connect pressurized water hose assembly (2) to water inlet assembly (3) on steam

2-2


62/447

TM 9-4940-531-14

2-5. PREPARATION FOR USE (cont)

c. Initial Start Up. (cont)

(c)

(d)

(e)

(f

(g)

(h)

(i)

(j)

Ensure coupler cap (4) is tightened securely.

Rotate ball valve (5) to ON position.

Turn on water supply and fill water tank assembly (6).

If present, remove nozzle from steam cleaning gun (7). Open trigger (8).

Check that the CHEMICAL METERING valve (9) is in the closed position.

If using generator power, refer to TM 5-6115-615-12 and start generator set.

Check that EMERGENCY OFF circuit breaker (10) is in ON position.

Rotate MODE SELECTOR (11) to COLD.

CAUTION

Keep water and steam away from the oil burner electromagnet relay. Moisture can

permanently damage internal parts.

(k) Press PUSH TO START switch (12). Steam cleaner should start immediately.

(l) When a steady stream of clear water is discharged from steam cleaning gun (7), steam

cleaner is flushed and ready for operation.

2-28


63/447

TM 9-4940-531-1

(2) If steam cleaner is to be operated from a nonpressurized water source, perform the follow

ing steps:

(a) Open exhaust flap (1).

(b) Unscrew coupler cap (2) and connect suction hose assembly (3) to water pump assem

bly (4).

(c) Rotate ball valve (5) to OFF position.

(d) Place foot valve/strainer end of suction hose assembly at least 6 in. (15 cm) below

water surface.

(e) If present, remove nozzle from steam cleaning gun (6). Open trigger (7).

2-2


64/447

TM 9-4940-531-14

2-5 . P R E P A R A T IO N F O R U S E (con t )

c. Initial Start Up. (cont)

(f) Check that the CHEMICAL METERING valve (8) is in the closed position.

(g) If using generator power, refer to TM 5-6115-612-12 and start generator set.

(h) Check that EMERGENCY OFF circuit breaker (9) is in ON position.

(i) Rotate MODE SELECTOR (10) to COLD.

CAUTION

Keep water and steam away from the oil burner electromagnet relay. Moisture can

permanently damage internal parts.

(j) Press PUSH TO START switch (11). Steam cleaner should start immediately.

(k) If water pump does not prime within 3 minutes, stop steam cleaner by rotating MODE

SELECTOR (10) to OFF. Refer to Table 3-1, Operator Troubleshooting.

(l) When a steady stream of water is discharged from steam cleaning gun (6), steam

cleaner is flushed and ready for operation.

2-30


65/447

TM 9-4940-531-

2-6. OPERATING PROCEDURE

WARNING

Always use ear protection. During operation, the generator set exceeds permissible

decibel levels. The steam cleaner also exceeds permissible decibel levels during

operation in the steam mode and during blowdown. Failure to observe this warning

could result in permanent hearing injury.

Wear safety goggles/glasses and gloves (item 12, appx E) when operating the steam

cleaner in any mode to prevent injury from scalding and high water velocity.

CAUTION

Do not use the steam cleaner in any mode on surfaces having a petroleum-based

undercoating. Otherwise erosion/removal of such undercoating can result.

NOTE

Read through operating procedures before operating the steam cleaner.

In most instances, equipment should be washed by starting at ground level and working

up, and rinsed by starting at the top and working down.

a. General Theory of Operation. The steam cleaner can deliver steam or hot or cold water,

all at high pressure, as selected by the MODE SELECTOR on the upper control panel assembly.

When MODE SELECTOR is turned to OFF position from the hot or cold water position, steam cleane

will automatically go into a drain cycle. When MODE SELECTOR is turned to OFF position from

steam operation, steam cleaner will automatically start the blowdown cycle.

2-


66/447

TM 9-4940-531-14

2-6. OPERATING PROCEDURE (cont)

b. Cold Rinse.

(1) Perform initial startup procedure (para 2-5c.).

(2) Install appropriate nozzle on steam cleaning gun (1) (para 2-1).

(3) If using generator power, refer to TM 5-6115-615-12 and start generator set.

(4) Rotate MODE SELECTOR (2) to COLD.

(5) Press PUSH TO START switch (3). Steam cleaner should start immediately.

WARNING

To avoid possible injury to personnel, if outlet pressure exceeds 600 psi (4137 kPa),

turn EMERGENCY OFF switch to OFF position and notify unit maintenance.

(6) OUTLET PRESSURE gauge (4) reading should build up to a minimum of 400 psi (2758kPa). Maximum pressure in this mode is 600 psi (4137 kPa). Steam cleaner is

Documents

TM 9-4910-531-14 CLEANER STEAM, HIGH PRESSURE, WATER JET, TRAILER MOUNTED