Paint Spray Gun

September, 1999Air Tools Manual 1 TAB: Spray Gun Breakdowns

Information for preventing damageto equipment.

IMPORTANT SAFETY INFORMATION- A HAZARD THAT MIGHT CAUSE SE-RIOUS INJURY OR LOSS OF LIFE.

This manual contains informationthat is important for you to knowand understand. This informationrelates to protecting YOURSAFETY and PREVENTINGEQUIPMENT PROBLEMS. Tohelp you recognize this informa-tion, we use the symbols to theright. Please read the manual andpay attention to these sections.

SAFETY GUIDELINES - DEFINITIONS

GENERAL MANUALfor

HVLP Gravity Feed Paint Spray Gun

Model NumberASP650

SPECIFICATIONSAir Inlet ...................................... ....1/4 NPSMMaximum Air Pressure............... ....145 psi.Recommended OperatingAir Pressure for 10 psi at Air Cap....43 psi.Air Consumption ........................ ....13.5 cfm @ 40 psi.Net Weight ................................. ....1.6 lb.Cup ............................................ ....600 c.c. (20.29 oz)

Part Number

* Standard size, supplied with gun. Other nozzle sets should be orderedseparately. A set includes an air cap, fluid nozzle and fluid needle.

FLUID NOZZLE SETOrifice Diameter

HV302-14*

HV302-17

HV302-20

1.4 mm (.055”)

1.7 mm (.067”)

2.0 mm (.079”)

MGP-ASP650 8/23/99


RISK OFEXPLOSION OR FIRE -

FLAMMABLEMATERIALS

RISK OFEXPLOSION -

INCOMPATIBLEMATERIALS

RISK TOBREATHING

RISK FROM FLYINGOBJECTS

IMPORTANT SAFETY INSTRUCTIONS• SAVE THESE INSTRUCTIONS •

HAZARD WHAT CAN HAPPEN

Never spray near open flames or pilotlights in stoves or heaters.

Never smoke while spraying.

Provide ample ventilation when spray-ing indoors.

Read the label or data sheet for thematerial you intend to spray.1. Never use any type of spray

coating material containing thesesolvents.

2. Never use these solvents forequipment cleaning or flushing.

3. If in doubt as to whether amaterial is compatible, contactyour material supplier.

Use a NIOSH approved mask or respi-rator and protective clothing designedfor use with your specific applicationand spray materials. Some masks pro-vide only limited protection against toxicmaterials and harmful paint solvent.Consult with a Safety Expert or Indus-trial Hygienist if uncertain about yourequipment or materials.

Disconnect the gun from the air line, orcompletely depressurize the air linewhenever the gun is to be disas-sembled.

Never point any nozzle or sprayer to-ward a person or part of the body.Always wear ANSI 278.1 safety ap-proved goggles or glasses when spray-ing.

Always wear hearing protection whenoperating spray equipment.

When paints or materials are sprayed, theyare broken into very small particles andmixed with air. This will cause certain paintsand materials to become extremely flam-mable and could result in serious injury ordeath.

The solvents 1,1,1-Trichloroethane and Me-thylene Chloride can chemically react withthe aluminum used in most spray equip-ment, and this gun and cup, to produce anexplosion hazard and could result in seriousinjury or death.

Some paints, coatings and solvents maycause lung damage, and burns if inhaled orallowed to come into contact with skin oreyes.

Certain parts are under pressure wheneverthe gun is connected to a pressurized airline. These parts may be propelled if the gunis disassembled.

Compressed air may propel dirt, metal shav-ings, etc. and possibly cause an injury.

Prolonged exposure to air spray can resultin permanent damage to hearing.

IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULDRESULT IN SERIOUS INJURY AND PROPERTY DAMAGE. READ ANDUNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS BE-FORE USING THIS EQUIPMENT.

HOW TO PREVENT IT

The Following Hazards Can Occur During The Normal Use Of This Product:


Carton includes:Model ASP650 - a High Volume LowPressure, external mix, high capacityspray gun, designed for high qualityproduction spraying of paint and otherfinishing material from a gravity feedplastic cup.Spanner Wrench and Socket Span-ner - Used to disassemble spray gun formaintenance.Allen Wrench - Used to remove the aircontrol valve set.Large and Small Cleaning Brush -Used to clean spray gun.Tube of Lubricate - Used to lubricateall working points.

GENERAL INFORMATION

DO NOT attempt to unclog (backflush) spray gun by squeezing trig-ger while holding finger in front offluid nozzle.

Pressure may vary accord-ing to viscosity of materialused. Maximum working

pressure of gun is 145 psi.DO NOT EXCEED PRES-SURE LIMIT OF GUN OR

OPERATION

ANY OTHER COMPONENTIN SYSTEM!

Prior to daily operation, makecertain that all connectionsand fittings are secure. Checkhose and all connections fora weak or worn conditionthat could render systemunsafe. All replacement com-ponents such as hose or fit-tings must have a workingpressure equal to or greaterthan system pressure.

Wooden Cleaning Sticks - Used toclean small orifices.

Before disassembly orremoval of any part of gunor attached components,shut off compressor,release pressure by de-pressing trigger, anddisconnect power source.NEVER assume systempressure is zero!

To avoid creating anexplosive atmosphere,work only in well-ventilated areas.

Use of a face mask isrecommended to preventinhalation of toxic material.


OPERATION (continued)

(F) Filter

(A) AirValve Nut

(E) Non-Drip Cup

(G) Air Cap

(C) AirVolumeControlKnob

(D) FluidControl Knob

(B) SprayPatternAdjustment

Prior to shipment, this gun was treatedwith an anticorrosive agent. Before us-ing this gun make sure that it is carefullyflushed with thinner.

(H) Horns

1. The position of the air cap (H)horns will determine the spraypattern. Loosen and rotate air capto acheive desired pattern. Tighten

Horizontal position

Vertical position

(G) air cap.2. Attach material cup to the gun.3. Attach air supply line to 1/4 NPSM

air inlet. Use a 5/16” I.D. hose.

NEVER point spray gun atself or any other person. Ac-cidental discharge of mate-rial may result in serious in-jury.

4. Adjust air pressure at air compres-sor.

DO NOT exceed 145 psi.NOTE: In some countries, the operat-ing pressure of HVLP spray guns above10 psi is prohibited at the air cap area.Use regulator (HV302-53) and air captest kit (HV302-95) to meet the require-ments when necessary.5. Depress spray gun trigger fully to

spray material. NOTE: Depress-ing trigger partially will cause onlyair to be released.

Adjust spray gun:a. Amount of material released (den-

sity of “fan spray”) is controlled by(D) fluid control knob. Turn knobcounterclockwise to increase, orclockwise to decrease, the fluidflow.

b. Width of “fan spray” is governedby (B) pattern adjustment knob.Turn knob counterclockwise to in-crease, or clockwise to decrease,air flow.

c. Air quantity is controlled by (C) air-volume control knob. Turn knobcounterclockwise to increase, orclockwise to decrease, the air flow.

NOTE:Care should be exercised whenhandling spray gun to avoiddamage to the orifice of the aircap and tip of fluid nozzle.Damage to these parts resultsin irregular spray patterns.


It is important that spray gun be cleanedafter daily use. Cleaning is accom-plished by spraying appropriate solventor thinner through system. Wipe exte-rior of spray gun with solvent soakedcloth or use attached brush(s) to re-move any accumulated material.NOTE: See parts list for key numbersreferenced.Exchange of nozzle setWhen changing nozzle set, make surethe complete nozzle set is exchanged.A set consist of air cap, paint nozzleand fluid needle. NOTE: Assemblefluid nozzle before putting in fluid needle.Exchange of the self-tensioning needle packingThe fluid needle seal (1-3) is effectedby a Teflon packing with self-tensioningcompression spring (4). To change thepacking during general overhaul, pleaseuse the socket spanner (29) and span-ner wrench provided.Cleaninga. Empty material from gravity feed

cup and replace with a suitablesolvent.

b. Operate trigger until all materialtraces have disappeared and gunis thoroughly clean.

c. Wipe gun exterior with a solventdampened cloth or providedbrush(s) (32).

NOTE: If fluid nozzle 1-2* is to beremoved for thorough cleaning, squeezetrigger to prevent damage of fluid needletip 1-3* when unscrewing nozzle.

Always exercise extremecare when using any solventor thinner. Never clean gunnear fire, flame, or any sourceof heat or sparks. Properlydispose of used cleaningmaterials.

DO NOT soak entire spraygun in solvent or thin-ner for a long period of timethis will destroy lubricantsand possibly make motionuneven. NEVER use lye orcaustic alkaline solution forcleaning. Such solutions willattack aluminum alloy partsof gun.

IMPORTANT: Make certain that air cap andfluid nozzle are kept clean atall times. If necessary, re-move these two componentsand soak them in solvent.DO NOT use metal means toclean air cap and fluid nozzle.It may cause irregular spraypattern.

LubricationThe following lubrication proceduresmust be observed after thoroughly clean-ing the gun to ensure effective, highquality performance of spray gun.1. Lubricate working points 17, 1-3*

& 9 with straight mineral oil, or cas-tor oil.

2. Periodically, place a few drops ofoil on tapered sections of fluidnozzle 1-2* to ensure easyoperation of air cap.

3. Outer diameter of needle sleeve1-3* of fluid needle assembly mustbe lubricated occasionally withstraight mineral oil.

MAINTENANCE


TROUBLESHOOTINGDried material isclogging side-port “A” andcausing side-port “B” to blowspray towardsthe cloggedside

A. Soak side-ports in thinner toclean clog. DO NOT pokeany opening with metalobjects (use the woodencleaning sticks provided)

B. Dried material atfluid nozzle “C”restricts air flow

Loose air nozzle

Air pressure settoo high

Remove air nozzle. Wipe offfluid tip using a cloth soakedin thinner or by soft brush

Fasten nozzle securely

Reduce air pressure

C. Spitting, irregularor fluttering spray

Fluid nozzle cracked or wornLeak at thread of fluid nozzleLeak at fluid needle

Needle packing worn out

Insufficient fluid in cup

Vent hole in container coverclogged

Tighten or replaceTighten fluid nozzleTighten compression nutassembly or replace needlepacking

Replace packing

Fill cup with fluid

Clean Out

D. Split spray pattern Air pressure too high Turn pattern control knobclockwise to decrease fanwidth. Turn fluid needleadjusting nut counterclock-wise to increase fluid flow

Material too heavy

Insufficient air pressure

Fluid pressure too high

Dried material on tip of fluidnozzle or air jets of air cap

Thin material or use largerorifice fluid nozzle set

Increase pressure to withinlimit

Reduce pressure

Clean

Air needle partially closedDried material in air jets or aircapObstruction in air line

Open control knobClean

Remove obstruction

Air pressure to high forviscosity of fluid

Reduce air pressure and/oropen fluid control knob

Loose cup or foreignsubstances on/between cupthread and fluid inlet

Tighten and clean or replaceit

F. Inadequate airdelivery

E. Unatomized orspattered spray

G. Excessive fog

I. Material leakingfrom nozzle whentrigger is released

H. Material leakingfrom fluid inlet ofcup.

Worn fluid needleDried material in tip of nozzleLoose packing nut

ReplaceCleanTighten needle packing nut byturning counterclockwise

Defective Pattern Likely Cause Suggested Remedy


PARTS LIST

REFNO DESCRIPTION PART NO QTY

1-1* Air Cap HV305-81 11-2* Fluid Nozzle HV305-82 11-3* Fluid Needle HV305-83 12 Needle Packing Nut HP302-02 13 Needle Packing-teflon HP302-03 14 Spring for Needle Packing HP302-04 15 Valve Seat HP302-41 16 Teflon Packing for Air Valve HP302-42 17 E-04 Snap Ring HP302-71-1 48 Trigger Pin HP302-71-3 19 Fluid Needle Pin HP302-71-4 110 Trigger HP302-71-2 111 Gasket HP302-72-3 112 Pattern Adjustment Valve Set HP302-71-14 113 Pattern Adjustment Knob HP302-72-5 114 Screw HP302-72-6 115 Air Inlet HP302-51 116 Regulator (optional) HV302-53 117 Air Valve Stem HV302-43 118 Air Valve HV302-43-1 119 Spring HV302-44 120 Air Control Valve Set HP302-45 121 Threaded Pin for Air Valve HP302-46 122 Fluid Needle Spring HP302-22 123 Counter Ring HP302-23 124 Fluid Control Knob HP302-24 125 Filter G1-14 126 Gravity Cup G1-12 127 Cup Lid G1-15 128 Plug G1-16 129 Socket Spanner HP302-63 130 Socket Wrench HP302-91 131 Spanner Wrench HP302-92 132 Brush HP302-94 1

Note:* When ordering these parts please indicate fluid nozzle set size (1.4 mm 1.7 mm, 2.0 mm)

Documents

Paint Spray Gun