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OPERATION MANUAL

STX SERIES RIDE-ONPOWER TROWEL

STX55J6

Revision #1(07/16/04)

MULTIQUIP INC..... PARTS DEPARTMENT:18910 WILMINGTON AVE. 800-427-1244CARSON, CALIFORNIA 90746 FAX: 800-672-7877310-537-3700 SERVICE DEPARTMENT/TECHNICAL ASSISTANCE:800-421-1244 800-478-1244FAX: 310-537-3927 FAX: 310-631-5032E-mail :[email protected] • www.mult iquip.comAtlanta • Boise • NewarkMontreal, Canada • Manchester, UKRio De Janiero, Brazil • Guadalajara, Mexico

MODEL #

SERIAL #

P/N 21616

STX-SERIES • RIDE-ON POWER TROWEL — OPERATION MANUAL — REV. #1 (07/16/04) — PAGE 3

/02) — PAGE 3

HERE'S HOW TO GET HELPPLEASE HAVE THE MODEL AND SERIALNUMBER ON-HAND WHEN CALLING

PARTS DEPARTMENT800-427-1244 or 310-537-3700FAX: 800-672-7877 or 310-637-3284

SERVICE DEPARTMENT800-421-1244FAX: 310-537-4259

TECHNICAL ASSISTANCE800-478-1244FAX: 310-631-5032

WARRANTY DEPARTMENT888-661-4279, or 310-661-4279FAX: 310-537-1173

STX-SERIES — HERE'S HOW TO GET HELP

PAGE 4 — STX-SERIES • RIDE-ON POWER TROWEL — OPERATION MANUAL — REV. #1 (07/16/04)

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STX-SERIES — TABLE OF CONTENTSTechnical Assistance ............................................... 3Table of Contents .................................................... 4Training Checklist .................................................... 5Daily Pre-Operation Checklist ................................. 6Safety Message Alert Symbols ............................ 7-8Rules For Safe Operation ....................................... 9Operation And Safety Decals ................................ 10Specifications ........................................................ 11General Information .............................................. 12

WHITEMAN — STX-SERIESRIDE-ON POWER TROWELControls and Components ............................... 13-14Pre-Inspection ....................................................... 15Initial Start-Up .................................................. 16-17Operation ......................................................... 18-20Maintenance .................................................... 21-26Troubleshooting ............................................... 27-28

NOTE Specifications are subject to changewithout notice.


/02) — PAGE 5

TRAINING CHECKLIST

This checklist lists the minimum requirements for machinemaintenance and operation. Please feel free to detach it andmake copies. Use this checklist when training a new operator oruse as a review for more experienced operators.

Operator _________________________________________ Trainee __________________________________________

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STX-SERIES — TRAINING CHECKLIST

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DAILY PRE-OPERATION CHECKLIST

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STX-SERIES — DAILY PRE-OPERATION CHECKLIST

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/02) — PAGE 7

STX-SERIES — SAFETY MESSAGE ALERT SYMBOLS

Safety precautions should be followed at all times when operatingthis equipment. Failure to read and understand the SafetyMessages and Operating Instructions could result in injury toyourself and others.

FOR YOUR SAFETY AND THE SAFETY OF OTHERS!

This Owner's Manual has been developed to providecomplete instructions for the safe and efficient operationof the MQ Whiteman STX-SERIES Ride-On PowerTrowel. For engine maintenance information, pleaserefer to the engine manufacturers instructions for datarelative to its safe operations.Before using this Ride-On Power Trowel, ensurethat the operating individual has read andunderstands all instructions in this manual.

NOTE

SAFETY MESSAGE ALERT SYMBOLS

The three (3) Safety Messages shown below will inform youabout potential hazards that could injure you or others. TheSafety Messages specifically address the level of exposure tothe operator, and are preceded by one of three words: DANGER,WARNING, or CAUTION.

DANGER: You WILL be KILLED orSERIOUSLY injured if you DO NOT followdirections.

WARNING: You CAN be KILLED orSERIOUSLY injured if you DO NOT followdirections.

CAUTION: You CAN be injured if youDO NOT follow directions.

HAZARD SYMBOLS

Engine exhaust gases contain poisonouscarbon monoxide. This gas is colorless andodorless, and can cause death if inhaled.NEVER operate this equipment in a confinedarea or enclosed structure that does notprovide ample free flow air.

Potential hazards associated with STX-SERIES Ride-on PowerTrowel operation will be referenced with Hazard Symbols whichappear throughout this manual, and will be referenced inconjunction with Safety Message Alert Symbols.

Diesel fuel is flammable, and its vapors cancause an explosion if ignited. DO NOT startthe engine near spilled fuel or combustiblefluids. DO NOT fill the fuel tank while theengine is running or hot. DO NOT overfilltank, since spilled fuel could ignite if it comesinto contact with hot engine parts or sparksfrom the ignition system. Store fuel in approvedcontainers, in well-ventilated areas and awayfrom sparks and flames. NEVER use fuel asa cleaning agent.

Lethal Exhaust Gases

Burn Hazards

Engine components can generate extreme heat.To prevent burns, DO NOT touch these areaswhile the engine is running or immediately afteroperations. NEVER operate the engine withheat shields or heat guards removed.

Rotating Parts

NEVER operate equipment with covers, orguards removed. Keep fingers, hands, hairand clothing away from all moving parts toprevent injury.

Skin Injection Hazard

NEVER use your hand to find hydraulic leaks.Use a piece of wood or cardboard. Hydraulicfluid injected into the skin must be treated bya knowledgable physician immediately orsevere injury or death can occur.

Explosive Fuel


)

STX-SERIES — SAFETY MESSAGE ALERT SYMBOLS

Accidental Starting

ALWAYS place the ON/OFF switch in theOFF position, and remove the key.

Over Speed Conditions

NEVER tamper with the factory settings of theengine governor or settings. Personal injuryand damage to the engine or equipment canresult if operating in speed ranges abovemaximum allowable.

Respiratory Hazard

ALWAYS wear approved respiratoryprotection.

ALWAYS wear approved eye and hearingprotection.

Sight and Hearing hazard

Equipment Damage Messages

Other important messages are provided throughout this manualto help prevent damage to your trowel, other property, or thesurrounding environment.

NOTEThis Ride-On Power Trowel, otherproperty, or the surroundingenvironment could be damaged ifyou do not follow instructions.

EMERGENCIES

■ ALWAYS know the location ofthe nearest fire extinguisher.

■ ALWAYS know the location of thenearest and first aid kit.

■ In emergencys always know the location of thenearest phone or keep a phone on the job site.Also know the phone numbers of the nearestambulance, doctor and fire department. Thisinformation will be invaluable in the case of anemergency.


/02) — PAGE 9

STX-SERIES — RULES FOR SAFE OPERATIONCAUTIONCAUTIONCAUTIONCAUTIONCAUTION

Failure to follow instructions in this manual maylead to serious injury or even death! Thisequipment is to be operated by trained andqualified personnel only! This equipment isfor industrial use only and should not beregarded as a toy.

The following safety guidelines should always be used whenoperating the STX-SERIES Ride-on Power Trowel:

GENERAL SAFETY

■ DO NOT operate or service this equipment before readingthis entire manual.

■ This equipment should not be operated by persons under18 years of age.

■ DO NOT operate this equipment unless all guards and safetydevices are attached and in place.

■ ALWAYS use proper heavy lifting techniques when movingequipment. This ride-on trowel is very heavy. It should belifted only with a lifting device (i.e. crane, forklift, etc.) with alifting capacity of at least one ton.

■ ALWAYS check to make sure that the operating area is clearbefore starting the engine.

■ ALWAYS test the safety safety stop switch before operatingthe equipment.

■ NEVER place your feet inside the guard rings while startingor operating this equipment.

■ NEVER operate this equipment without proper protectiveclothing, shatterproof glasses, steel-toed boots and otherprotective devices required by the job. Avoid wearing jewelryor loose fitting clothing that may snag on the controls ormoving parts, this can cause a serious injury.

■ ALWAYS keep clear of rotating or moving parts whileoperating this equipment.

■ NEVER leave the machine unattended while running.

■ ALWAYS refuel in a well-ventilated area, away from sparksand open flames.

■ ALWAYS use extreme caution when working with flammableliquids. When refueling, stop the engine and allow it tocool. DO NOT smoke around or near the machine. Fire orexplosion could result from flames or sparks, or if fuel is spilledon a hot engine.

■ Moving Parts – Shut down the engine before performingservice or maintenance functions. Contact with moving partscan cause serious injury.

■ High Temperatures – Allow the machineand engine to cool before adding fuel orperforming service and maintenancefunctions. Contact with hot components cancause serious burns.

Maintenance Safety

■ Disconnect the battery and spark plug wires before attemptingany type of service.

■ Securely support any machine components that must beraised.

■ NEVER lubricate components or attempt service on a runningmachine.

■ ALWAYS allow the machine a proper amount of time to coolbefore servicing.

■ Keep the machinery in proper running condition.

■ Make sure that there is no buildup of concrete, grease, oil ordebris on the machine.

■ Fix damage to the machine immediately and always replacebroken parts.

■ Dispose of hazardous waste properly. Examples ofpotentially hazardous waste are used motor oil, fuel andfuel filters.

■ DO NOT use food or plastic containers to dispose ofhazardous waste.

■ DO NOT pour waste, oil or fuel directly onto the ground,down a drain or into any water source.


)

STX-SERIES — OPERATION AND SAFETY DECALSOPERATION AND SAFETY DECALS

The STX-SERIES Ride-on Power Trowel is equipped with a number of operation and safety decals. These decals are provided foroperator safety and maintenance information. Table 1 below illustrates these decals as they appear on the machine. Should any ofthese decals become unreadable, replacements can be obtained from your dealer.


/02) — PAGE 11

STX-SERIES — SPECIFICATIONS

NOTE:

1. This value includes the seat height.

2. Sound pressure is a weighted measure. Measured at theoperators ear position while the ride-on trowel is operatingat full throttle on concrete in a manner most oftenexperienced in “normal” circumstances. Sound pressuremay vary depending upon the condition of the concrete.Hearing protection is always recommended.

3. The vibration level indicated is the maximum RMS (RootMean Square) value obtained at the handle grip whileoperating the ride-on trowel on curing concrete in a manner

most often experienced in “normal” circumstances. Valueswere obtained from all three axes of motion. The valuesshown represent the maximum RMS value from thesemeasurements.

4. “AW” stands for anti-wear and “MV” stands for multi-viscosity. The 68 refers to the general viscosity range andis similar to 10W-30-motor oil. It is recommended that AWMV 68 hydraulic oil be used. If this type of hydraulic oil isnot available then use 10W-30 engine oil (cold weather)or 10W-40 engine oil (hot weather).

Figure 1. STX-SERIES Dimension /Specifications

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STX-SERIES — GENERAL INFORMATIONGENERAL INFORMATION

The STX-SERIES Ride-On Power Trowels are designed for thefloating and finishing of concrete slabs.

Take a walk around the STX-SERIES Ride-On Power Trowel.Take notice of all the entire major components (see Figures 2and 3, pages 13 and 14) like the engine, blades, air cleaner,ignition switch etc. Check that there is always oil in the engine,and hydraulic oil in the hydraulic oil reservoir.

Read all the safety instructions carefully. Safety instructions willbe found throughout this manual and on the machine. Keepall safety information in good, readable condition. Operatorsshould be well trained on the operation and maintenance ofthe STX-SERIES Ride-On Power Trowel.

Before using your STX-SERIES Ride-On Power Trowel, test iton a flat watered down section of finished concrete. This trial testrun will increase your confidence in using the trowel and at thesame time it will familiarize you with the trowel’s controls andindicators. In addition you will understand how the trowel willhandle under actual conditions.

Engine

The STX-SERIES Ride-On Power Trowel is available with astandard 55hp John Deere diesel engine. Refer to the engineowner’s manual for specific instructions regarding engineoperation. Please contact your nearest Multiquip Dealer for areplacement should the original manual disappear or becomeotherwise unusable.

Blades

The blades of the Ride-on Power Trowel finish the concrete asthey are swirled around the surface. Blades are classified asfloat (10 or 8 inches wide), and finish (6 inches wide). The STX-SERIES is equipped with six blades per rotor equally spaced ina radial pattern and attached to vertical rotating shaft by meansof a spider assembly.

Hydraulic Motor

Independent hydrostatic drive motors are coupled to the engine-powered hydrostatic pumps. Each motor drives a spiderassembly.

Hydraulic Steering

Dual palm grip joystick controls located to the left and right of theoperator are provided for steering the STX-SERIES Ride-onPower Trowel. The joysticks are linked to three hydraulic steeringcylinders located within the frame of the machine. Detailedexplanation of how the joystick controls affect the steering of thetrowel can be found in Table 3, on page 18.

Hydraulic Pump

Delivers a continuous controlled flow of hydraulic fluid to thehydraulic motors.

This Ride-on Power Trowel is very heavyand awkward to move around. Use properheavy lifting procedures and DO NOT attemptto lift the Ride-on Power Trowel by the guardrings.

Moving the Ride-On Trowel

The STX-SERIES Ride-on Power Trowel is designed to be movedand handled several ways. The easiest way to lift the ride-ontrowel is to utilize the lift loops that are welded to the frame.These lift loops are located to the left and right sides of theoperator’s seat (Figure 2, Page 13).

A strap or chain can be attached to these lift loops, allowing aforklift or crane to lift the Ride-on Power Trowel up onto a slab ofconcrete. The strap or chain should have a minimum 2,000pounds (1000-kg) lifting capacity and the lifting gear must becapable of lifting at least this amount.

Training

For proper training, please use the “TRAINING CHECKLIST”located in the front of this manual (Page 5). This checklist willprovide an outline for an experienced operator to provide trainingto a new operator.

CAUTIONCAUTIONCAUTIONCAUTIONCAUTION


/02) — PAGE 13

STX-SERIES — CONTROLS AND COMPONENTS

Figure 2. STX-SERIES Controls and Components (Front)

11. Foot Pedal – Controls blade speed. Slow blade speed isaccomplished by slightly depressing the foot pedal.Maximum blade speed is accomplished by fully depressingthe foot pedal.

12. Removable Steps (left & right) – Provides for safe footingfor mounting and dismounting trowel. When removed,provides access to spider and blade assemblies.

13. Retardant Spray Control Buttons (left & right) – Whenpressed allows retardant spray to flow through the spraynozzle located at the front of the machine.

14. Hand Holds – Use to assist safe mounting and dismountingtrowel.

15. Lift Loops – Located on both the left and right sides of themain frame. Used when the trowel must be lifted onto aconcrete slab.

16. Pitch Block – (Behind grill guard.) Measure and adjustpitch pressure at the pitch block.

17. Fuel Gauge/Filler Cap – Indicates the amount of fuel inthe fuel tank. Remove this cap to add fuel.

18. Overflow Bottle – (Behind grill guard.) Supplies water orcoolant to the radiator when radiator water or coolant levelis low. Fill to indicated level as shown on bottle.

19. Hydraulic Reservoir – Part of frame. Holds hydraulic oilnecessary for pump operation.

Figures 2 and 3 (pages 13 and 14) show the location of thecontrols, indicators and general maintenance parts. The functionof each control, indicator or maintenance part is explained below:

1. Seat – Place for operator to sit. Trowel blades will notrotate unless operator is seated. Seat is adjustable.

2. Trowel Speed Limiter Control – Used to adjust themaximum trowel speed that can be obtained when the footpedal is fully depressed.

3. Hour Meter – Indicates number of hours machine hasbeen used.

4. Throttle Control Lever – Controls the speed of the engine.Move the hand lever forward to increase engine speed(high), backwards to decrease engine speed (low).

5. Operator Gauges – Allows operator to monitor engine,hydraulic and electrical functions.

6. Ignition Switch – With key inserted turn clockwise to startengine.

7. Light Switch – When activated, turns on six halogen lights.Lights offer better visibility when working indoors.

8. Lights – Six low voltage halogen lights are provided withthis unit.

9. Toolbox Compartment – Storage for tools.

10. Spray Nozzles – Spray nozzle for retardant. Two spraynozzles are supplied with this unit.


)

STX-SERIES — CONTROLS AND COMPONENTS

Figure 3. STX-SERIES Controls and Components (Rear)

20. Documentation Box – Storage for documentation andother information regarding the trowel.

21. Battery – Provides +12V DC power to the electrical system.

22. Hydraulic Oil Sight Glass – Indicates the level of thehydraulic oil in the reservoir.

23. Hydraulic Suction Filter – Filters hydraulic fluid prior toentering the system. (10 Micron absolute synthetic media.)

24. Hydraulic Oil Expansion Tank – Accommodatesexpanding hydraulic oil as it gets hot. The oil gravity flowsback to the reservoir as it cools down, therefore NEVERopen the the Hydraulic Oil Filler Cap (Item 30) when thesystem is warm and the oil has expanded.

25. Steering Control (left side) – Allows the unit to move in aforward or reverse direction only.

26. Blade Pitch Control Switch (left side) – Adjusts the leftside blade pitch independently of the right side.

27. Blade Pitch Control (Twin Pitch) – Adjusts the bladepitches simultaneously.

28. Steering Control (right side) – Allows the unit to move ineither a forward, reverse left or right direction.

29. Grill Guards (left & right) – Protects operator from movingcomponents. Remove for maintenance access.

30. Hydraulic Oil Filler Cap – Remove this cap to addhydraulic oil. Open ONLY when system is cooled downand all expanded oil has returned to the reservoir.

31. Retardant Spray Tank – Holds 5 gallons of retardant,water, or other liquid.


/02) — PAGE 15

STX-SERIES — PRE-INSPECTION

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONFailure to understand the operation of theSTX-SERIES Ride-On Power Trowel couldresult in severe damage to the trowel orpersonal injury.

Fuel

Determine if the engine fuel is low (Figure 6). Iffuel level is low, remove the fuel filler cap andfill with diesel fuel. Handle fuel safely. Motorfuels are highly flammable and can bedangerous if mishandled. DO NOT smoke whilerefueling. DO NOT attempt to refuel the ride-ontrowel if the engine is hot or running.

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONNEVER store the Ride-On Power Trowel withfuel in the tank for any extended period oftime. ALWAYS clean up spilled fuelimmediately.

Figure 5. Hydraulic Oil Sight Glass

NOTE

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONHydraulic oil can get HOT!

ALWAYS allow hydraulic oil to cool beforeremoving fill cap.

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONRemoval of the fill cap when oil fills the sightglass will cause hydraulic oil to spill. Cleanup hydraulic oil spills immediately.

The following sections are intendedto assist the operator with pre-inspection and the initial start-up ofthe STX-SERIES Ride-On PowerTrowel. It is extremely important thatthese sections are read carefullybefore attempting to use the trowel

in the field. DO NOT use your Ride-On Power Trowel until thesesections are thoroughly understood.

Hydraulic Oil

Determine if the hydraulic oil is low by observing the level of oilin the hydraulic Oil Sight Glass (Figure 5). The hydraulic tankhas an elevated overflow bottle. DO NOT remove the fill capwhen the oil is hot or spillage will occur.

Figure 4. Engine Oil Dipstick Figure 6. Fuel Gauge

PRE-INSPECTION

Engine Oil

1. Pull the engine oil dipstick from its holder.

2. Determine if engine oil is low (Figure 4), add correct amountof engine oil to bring oil level to a normal safe level.

See Figures 2 and 3 (Pages 13 and 14) for the location of controlsand indicators referenced in this manual.

(FILL TO OVERFLOW WITHHYDRAULIC SYSTEM COOL)


)

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONNEVER operate the trowelin a confined area orenclosed area structurethat does not provide amplefree flow of air.

ALWAYS wear approved eye and hearingprotection before operating the ride-on powertrowel.

NEVER place hands or feet inside the guardrings while the engine is running. ALWAYSshut the engine down before performing anykind of maintenance service on the trowel.

Starting the Engine

1. With one foot on the ground and the other foot placed onthe trowel’s platform, grasp the grab handles lifting yourselfonto the trowel. Then sit down in the operator’s seat.

Figure 7. Engine Throttle Control Lever (Low)

STX-SERIES — INITIAL START-UP

5. Insert the ignition key into the ignition switch (Figure 8).

Figure 8. Ignition Switch and Key

2. The STX Ride-On Power Trowel is equipped with a SafetyStop Switch. The trowel will not move unless an operatoris sitting in the seat. While the engine can be started orcontinue to run with the operator off the seat, the rotors willnot rotate. The weight of an operator activates a switchwithin the seat allowing the rotors to turn.

DO NOT grab hold of the joysticks to liftyourself onto the trowel. Pulling on thejoysticks repeatedly will weaken the units.Always use the grab handles to lift yourselfon the trowel.

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONNEVER disable or disconnect the SafetyStop Switch. It is provided for the operators’safety and injury may result if it is disabled,disconnected or improperly maintained.


LOW

HIGH

3. It is recommended that the operation of the Safety StopSwitch is checked prior to performing any trowelingoperations. Doing this will verify that the switch is workingproperly and presents no danger to the operator.

4. Place the engine throttle lever (Figure 7) in the LOWposition.

INITIAL START-UP


/02) — PAGE 17

STX-SERIES — INITIAL START-UP

NOTE

In cold weather turn and hold theignition key counter clockwise to thepreheat position, wait until thepreheat indicator goes off beforeturning the ignition key clockwise tothe start position. Two or threepreheat cycles may be necessary invery cold weather.

Figure 10. Engine Throttle Control Lever (High)

6. Turn the ignition key clockwise to the (start) position. Theoil and charge indicator lights (Figure 9) should be on.

Figure 9. Oil and Charge Indicator Lights

7. Turn ignition key fully clockwise and listen for engine tostart. Once engine has started release ignition key. Letengine warm for a few minutes.

8. Place the engine throttle lever (Figure 11) in the HIGHposition.

9. The engine should be running at full RPM.

10. Repeat this section a few times to get fully acquainted withthe engine starting procedure.

LOW


)

STX-SERIES — OPERATION

Steering

Two joysticks (Figures 11 and 12) located to the left and right ofthe operator’s seat provide directional control for the STX-SERIES Ride-On Power Trowel. Table 3 illustrates the variousdirectional positions of the joysticks and their effect on the ride-on trowel.

NOTE All directional references withrespect to the joysticks are fromthe operator’s seat position.

Figure 11. Left Joystick Control

Figure 12. Right Joystick Control

See Table 3 for steering and directional relationship to JoystickControl movement.

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OPERATION

NOTE

The following section is intended asa basic guide to the Ride-On PowerTrowel operation, and is not to beconsidered a complete guide toconcrete finishing. It is stronglysuggested that all operators

(experienced and novice) read “Slabs on Grade” published bythe American Concrete Institute, Detroit Michigan.


/02) — PAGE 19


2. Push both the left and right joysticks forward (Figure 14).

3. With your right foot, slowly depress the right foot pedalhalfway. Notice that the ride-on power trowel begins to movein a forward direction. Release both joystick controls tostop forward movement then remove your right foot fromthe foot pedal.

4. Practice holding the machine in one place as you increaseblade speed. When about 75% of maximum blade speedhas been reached, the blade will be moving at properfinishing speed. The machine may be difficult to keep inone place. Trying to keep the ride-on trowel stationary is agood practice for operation.

Figure 14. Joystick Control Forward Direction

7. Pull both the left and right joysticks backward (Figure 15)and repeat steps 3 through 6 while substituting the wordreverse for forward.

Figure 15. Joystick Control Reverse Direction

Trowel Speed Limiter Control

The speed limiter control located on the control panel (Figure16) can be used to adjust the maximum trowel speed that can beobtained when the foot pedal is fully depressed. Pull up to reducethe maximum speed and push down to return to full speed. Forfine adjustments, rotate the knob clockwise or counter-clockwise.

LOW

HOLD

HOLD

EA

SE

Figure 16. Trowel Speed Limiter Control

5. Practice maneuvering the Ride-on Power Trowel using theinformation listed in Table 3. Try to practice controlledmotions as if you were finishing a slab of concrete. Practiceedging and covering a large area

6. Try adjusting the pitch of the blades. This can be done withthe ride-on trowel stopped or while the trowel is moving,whatever feels comfortable. Test the operation of optionalequipment like retardant spray and lights if equipped.

1. The foot pedal (Figure 13) solely controls blade speed.The position of the foot pedal determines the blade speed.Slow blade speed is obtained by slightly depressing thepedal. Maximum blade speed is obtained by fullydepressing the pedal.

Figure 13. Blade Speed Control Foot Pedal


)


Figure 17. Blade Pitch Control

LEFT

PITCH

ONLY

BLADES TO BE FLAT

WITH FLOAT PANS

TWIN

PITCH

LESS PITCH

MORE PITCH

Blade Pitch Control

The trowel blades can be pitched for various finishing operationswith the two rocker switches located on the left control panelnext to the left joystick control (Figure 17).

Figure 18. Blade Pitch Rocker Switches

The right switch pitches both blades at the same time while theleft switch will pitch only the left blade. Moving the switchesforward increases the pitch while moving them backwarddecreases the pitch, (Figure 18).

2. Turn the ignition key counter-clockwise to the "starterswitch contact " position, then remove the key.

3. Clean and remove any foreign debris from the trowel.

Engine Shut-Down

1. Return the speed control lever (Figure 19) to low idle, andallow the engine to idle for 5 minutes .

NOTE

Failure to allow the engine to idlefor 5 minutes before shutting engineOFF may lead to turbochargerdamage.

LOW

HIGH

Figure 19. Blade Pitch Control

1. TWIN PITCH all the way DOWN.

2. LEFT PITCH up a little ways.

3. TWIN PITCH all the way DOWN, again.

4. LEFT PITCH all the way DOWN.

Important! To get the blades absolutely flat for using floatpans follow these steps:


/02) — PAGE 21

STX-SERIES — MAINTENANCE

Figure 20. Trowel Speed Control

Disconnect battery cablesbefore attempting anyservice or maintenance onthe Ride-on Power Trowel.ALWAYS allow the engineto cool before servicing. NEVER attempt anymaintenance work on a hot! (muffler, radiator,etc.) trowel.

NOTE

NOTEChange the hydraulic oil and filterafter the first 100 hours of use, thenchange every 250 hours.

See the engine manual supplied withyour machine for appropriate enginemaintenance schedule andtroubleshooting guide for problems.

At the front of the book (Page 6) there is a “Daily Pre-OperationChecklist”. Make copies of this checklist and use it on a dailybasis.

Maintenance Schedule

Change the hydraulic oil and filter after the first 100 hours ofuse, then change every 250 hours.

Daily (8-10 Hours)

1. Check fluid levels in engine and reservoir; fill as necessary.Weekly (30-40 Hours)

2. Relube arms, thrust collar and clutch.

3. Replace blades if necessary.

4. Check, clean, or replace the engine air filter as necessary.

5. Replace engine oil and filter as necessary, see enginemanual.

Monthly (100-125 Hours)

Remove, clean, reinstall and relube the arms and thrust collar.Adjust the blade arms.

Yearly (500-600 Hours)

1. Check and replace if necessary the arm bushings, andthrust collar bushings.

2. Adjust blade speed.

3. Replace hydraulic fluid and hydraulic filter.


Right Side Trowel Speed Adjustment

The right side trowel speed is adjusted by changing the lengthof the connecting rod on the pump actuation levers (Figure 21).

Figure 21. Pump Connecting Rod & Levers

MAINTENANCE

A

Checking/Adjusting Trowel Speed

Because the two hydraulic drive motors operate independent ofeach other, the trowel speed between them may vary. If the unit’ssteering is difficult to control, or if one spider is spinning noticeablyfaster or slower than the other, the trowel speed may need to bechecked. It is also recommended that the trowel speed bechecked at least once a year.

Trowel speed adjustment is a two-step process. First, the leftside should be checked and/or adjusted. Second, the right sideshould be adjusted to match the left.

Left Side Trowel Speed Adjustment

The left side trowel speed is adjusted by the set bolt locatedunder the operator's platform (Item A, Figure 20) and accessedby opening the storage panel door. Backing the set screw outdecreases the left side trowel speed; screwing it inward increasesthe speed.

MAINTENANCE PROCEDURES


)


Figure 22. Turnbuckle & Adjustment Nuts

Matching Blade Pitch for Both Sets of Blades

Sometimes it may be necessary to match blade pitch betweenthe left and right sets of blades. There are some signs that thismay be necessary. For example, the differences in pitch cancause a noticeable difference in finish quality between the leftand right sets of blades. The difference in blade pitch can alsomake the machine difficult to control. This is due to the surfacearea in contact with the concrete (the blade set with the greatercontact area tends to stick to the concrete more).

To synchronize pitch on both sides, the left blade assembly canbe pitched by itself. By using the electric blade pitch rockerswitches, (Figure 23) the pitch can be syncronized on the leftand the right sides.

■ Is the machine wearing out blades unevenly (i.e. one bladeis completely worn out while the others look new)?

■ Does the machine have a perceptible rolling or bouncingmotion when in use?

■ Look at the machine while it is running, do the guard rings“rock up and down” relative to the ground?

Watch for the following indications when determining if bladepitch adjustments are necessary:

Blade Pitch Adjustment Procedure

The maintenance adjustment of blade pitch is an adjustmentthat is made by a bolt (Figure 24) on the arm of the trowel bladefinger. This bolt is the contact point of the trowel arm to the lowerwear plate on the thrust collar. The goal of adjustment is to promoteconsistent blade pitch and finishing quality.

Figure 23. Blade Pitch Rocker Switches

LEFT

PITCH

ONLY

BLADES TO BE FLAT

WITH FLOAT PANS

TWIN

PITCH

LESS PITCH

MORE PITCH

This rod is basically a turnbuckle (Figure 22). Rotating it in onedirection increases the length and corresponding trowel speed.Rotating it the opposite direction decreases the length and trowelspeed. The right side trowel speed should be within 3 rpm of theleft.

A good starting point in the adjustment process is to adjust therod such that both trowels begin to rotate at the same time whenthe foot pedal is slowly depressed. This will, generally, get thespeeds fairly close; close enough for use if instrumentation isunavailable (i.e. on the job site). From this point on, some form ofinstrumentation is required to verify that the trowel speeds arewithin tolerance. A strobe or magnetic pickup type speed indicatoris recommended to verify the speeds.

The trowel speeds should be adjusted on a dry concrete floorwith the blades pitched flat. Units with the John Deereturbocharged engine should be set at 130-135 RPM with theengine at full speed.


/02) — PAGE 23

STX-SERIES — MAINTENANCEChanging A Blade

It is recommended that all the blades on the entire machine arechanged at the same time. If only one or some of the blades arechanged at one time, the machine will not finish concreteconsistently and the machine may wobble or bounce.

1. Place the machine on a flat, level surface. Adjust the bladepitch control to make the blades as flat as possible. Notethe blade orientation on the trowel arm. This is importantfor ride-on trowels as the two sets of blades counter-rotate.Lift the machine up, placing blocks under the main guardring to support it.

2. Remove the bolts and lock washers on the trowel arm, andthen remove the blade. (Access is easier if the steps areremoved.)

3. Scrape all concrete and debris from the trowel arm. This isimportant to properly seat the new blade.

4. Install the new blade, maintaining the proper orientationfor direction of rotation.

5. Affix the bolts and lock washers.

6. Torque to 9 ft. lbs.

7. Repeat steps 2-6 for all remaining blades.The easiest and most consistent way to make this adjustment isto use the Trowel Arm Adjustment Fixture (P.N. 9177) that ismanufactured by Whiteman Industries. This fixture will allowconsistent adjustment of the trowel arm fingers. It comes with allthe hardware necessary to properly accomplish this maintenanceand instructions on how to properly utilize this tool. Adjusting thetrowel arm fingers without a fixture requires a special talent.

If a trowel arm adjustment fixture is not available and immediateadjustment is necessary; we suggest the following procedure. Ifyou can see or feel which blade is pulling harder, adjust the boltthat corresponds to that blade. Another way to determine whichblades need adjustment is to place the machine on a flat surfaceand pitch the blades as flat as possible. Now, look at theadjustment bolts. They should all barely make contact with thelower wear plate on the spider. If you can see that one of them isnot making contact; some adjustment will be necessary.

It will be possible to adjust the “high” bolts down to the level ofthe one that is not touching, or adjust the “low” bolt up to the levelof the higher ones. If possible, adjust the low bolt up to the levelof the rest of the bolts. This is the fastest way, but may not alwayswork. Verify that after adjustment, the blades pitch correctly. Oftentimes, if the blades are incorrectly adjusted, they will not be ableto pitch flat. This occurs when the adjusting bolts have beenraised too high. Conversely, sometimes the adjusting bolts aretoo low and the blades cannot be pitched high enough forfinishing operations.

Adjustments are made by tightening or loosening the blade pitchadjustment bolt (Figure 24).

Figure 24. Blade Pitch Adjustment Bolt

1. Spider Plate

2. Blade Pitch Adjustment Bolt

3. Trowel Lever

4. Trowel Arm

5. Trowel Blade


)

Figure 25. Pressure Gauge (Hydraulic Pump)

Once the pressure gauges are installed and the spiders chainedtogether, the system can be checked.

With the foot pedal in the idle position and the engine at fullspeed, the pressure should be 200 to 300 psi. If the pressure isless than 200 psi, the charge system may need to be inspectedand/ or serviced. In particular, the suction filter and charge pumprelief valve should be checked. The suction filter may be plugged,or the relief valve may be stuck. Either condition may cause lowcharge pressure.

Checking Hydraulic Pressure

Many hydraulic problems are a result of low fluid levels. Beforechecking any other possibilities, make sure the hydraulic fluidlevel is up to the top of the sight glass which is located at theback/center of the frame.

Hydrostatic pressure can be checked using a pressure gaugewith a range of at least 5,000 psi. Two male diagnostic quickcouplers (one for each pump) are located beneath the right grillguard. To access couplers (Item B, Figure 26), remove the grillguard. It is best to use two gauges simultaneously (Figure 25),but it is possible to use only one gauge and repeat the procedurefor each side.

To fully test the hydrostatic system, the spiders will need to belocked so that they cannot rotate. This can be done by wrappinga chain around an arm on each spider, thus chaining themtogether in the back of the trowel.


With the engine at 50% to 70% of full speed, and spiders chainedtogether, slowly depress the foot pedal and read the gauges.The pressure should get to at least 4,350 psi (300 bar). If thepressure will not attain 4,350 psi (300 bar), the pump should beinspected and/or serviced by an authorized servicerepresentative.

LEFT SIDE PUMP

TEST PORT

PRESSURE GAUGE

5000 PSI RANGE

PRESSURE GAUGE

5000 PSI RANGE

3000

3000

5000

5000

bar

psi

bar

psi

4000

4000

200

200

250

250

300

300

50

50

100

100

150

150

1000

1000

2000

2000

WIKA

WIKA

RIGHT SIDE

HYDROSTATIC

PUMP

TEST PORT

USE A PARKER HANNIFIN

QUICK DISCONNECT

PD-SERIES DIAGNOSTIC

FEMALE COUPLER


/02) — PAGE 25

STX-SERIES — MAINTENANCEChecking Steering Pressure

Steering pressure is also checked at either of the high pressurediagnostic couplers under the right grill guard. Check steeringpressure at either coupler with a 300-600 PSI gauge.

Run the engine at full RPM. The steering system's factory settingis as shown in Table 4, however some operators may prefer amore responsive steering (higher pressure required) and someoperators may prefer a "softer feel" (lower pressure required).

CAUTIONCAUTIONCAUTIONCAUTIONCAUTIONDO NOT depress the FOOT PEDAL with the300-600 PSI gauge installed or the gaugewill be ruined.

(Table 4) indicates proper steering pressure. Check with engineat Full Speed.

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Steering Pressure Adjustment

Remember, DO NOT depress the foot pedal with the 300-600PSI gauge installed. Immediate damage to the gauge will occur.

Figure 28. Steering Pressure Adjustment

Figure 26. Pressure Check Couplers

Figure 27. Steering Pressure Check

1. Remove right grill guard.

2. Install 300 or 600 PSI gauge (Figure 27).

3. Loosen 1-1/16" jam nut on charge relief valve (Item A,Figure 28).

4. Use a 1/2" socket to adjust the small hex nut within thelarger hex jam nut (Item B, Figure 28).

5. Adjust to proper steering pressure specifications shown inTable 4.

6. Retighten jam nut, remove gauge, and reinstall grill guard.

A

B


)

STX-SERIES — MAINTENANCEPitch Pressure Check

Access the pitch block and pitch pressure test port at the right-rear of the trowel (Figure 29). Removal of the right-rear seatframe panel may be necessary. Pitch pressure must be measuredwith a pitch switch activated. With pitch switches unactivated,the pitch pressure will be the same as the charge/steeringpressure. Proper pitch pressure is 2300 PSI.

Figure 29. Pitch Block

Pitch Pressure Adjustment

If the pitch pressure check is out of specification, check thefollowing:

Figure 30. Pitch Pressure Check

1. Correct hydraulic fluid level.

2. Plugged hydraulic oil filter.

3. Loose or leaky fittings

4. Ruptured/damaged hydraulic lines.

5. Faulty hydraulic pump.

6. Pitch pressure Relief Valve no longer at factory setting.

1. Install 3000 PSI range pressure gauge to pitch pressuretest port on pitch block (Figure 30).

2. Activate left pitch switch.

3. Flatten blades (bottom out the pitch cylinders).

4. Continue to hold down pitch switch and record pressure.

Figure 31. Pitch Pressure Adjustment

A

B

The Pitch Pressure Relief Valve is SET AT THE FACTORY, andnormally should require no adjustment. If all other systems arefound not to be defective and the pitch relief valve is suspect,(loosened jam nut for example), the following steps can be usedto adjust the valve.


NEVER allow the pitch pressure to exceed 2700 PSI or equipmentdamage may result.

1. Remove right grill guard and right rear seat frame panel.

2. Install 3000 PSI pressure gauge to pitch pressure test porton pitch block (Figure 30).

3. Loosen jam nut on pitch block relief valve (Item A, Figure31).

4. Adjust the relief valve (Item B, Figure 31) with allen wrenchto proper pressure (2300 PSI)

5. Tighten jam nut, remove gauge and reinstall grill guardand frame panel.


/02) — PAGE 27

STX-SERIES — TROUBLESHOOTING

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/02) — PAGE 29

NOTE PAGE

OPERATION MANUAL

MULTIQUIP INC.POST OFFICE BOX 6254CARSON, CA 90749310-537-3700 • 800-421-1244FAX: 310-537-3927E-MAIL: [email protected]. multiquip.com

Atlanta • Boise • NewarkMontreal, Canada • Manchester, UK • Rio De Janiero, BR • Guadalajara, MX

HERE'S HOW TO GET HELPPLEASE HAVE THE MODEL AND SERIALNUMBER ON-HAND WHEN CALLING

PARTS DEPARTMENT800-427-1244 or 310-537-3700FAX: 800-672-7877 or 310-637-3284

SERVICE DEPARTMENT800-421-1244FAX: 310-537-4259

TECHNICAL ASSISTANCE800-478-1244FAX: 310-631-5032

WARRANTY DEPARTMENT888-661-4279, or 310-661-4279FAX: 310-537-1173

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STX SERIES RIDE-ON POWER TROWEL - Multiquip Inc