Troy-Bilt 640C, 644A Checkingand Adjusting, Forwarddrive Belt Tension, Handlebarsee -4 and re

Page 19

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

,_ WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

b. Unthreadthe hex nut (C,Figure 5-4) halfway up the adjustment screw (D).

c. Unhookthe top of the spring from the

 

 

Forward Clutch Bail.

 

 

d. Usepliers to preventthe adjuster (B)

 

 

from turning andturn the slotted screw lo-

 

 

cated inside the spring clockwise (viewed

 

 

from operator'sposition) to increaseten-

 

 

sion onthe spring. Turn the screw counter-

 

 

clockwise to decreasetension. Once

 

 

adjusted, reattachthe spring to the For-

 

C

ward Clutch Bail.

 

 

 

\

e. RepeatSteps2and3to re-measurethe

 

length of the spring. Whenthe secondmea-

 

 

surementis between1/16"-to- 3/16" longer

 

 

thanthefirst measurement,retightenthe hex

FORWARD

 

nut (C)againstthe top of the adjuster(B).

 

 

ReplacementBelt Information

Figure 5-3: Instafl tinesso that cutting edge of tines enter soft first when tiller movesforward.

If the drive belt needsto be replaced,see

your local authorizeddealeror refer to the

 

 

CHECKINGAND ADJUSTING

tension is correct if this second measure-

Parts List for ordering information. Use

FORWARDDRIVE BELT TENSION

ment is between1/6"-to- 3/16" longer than

only afactory-authorized belt as an "over-

the first measurement.

the-counter" belt may not perform satis-

 

It is important to maintain correct tension

4. If the spring is too short (lessthan

factorily. The procedure requires average

on the forward drive belt. A loose belt will

mechanicalability andcommonly available

1/16"), the tension is too loose. If the

causethe tinesandwheelsto slow down--

tools.

spring is too long (more than 3/16"), the

or stop completely -- eventhough the en-

 

tension is too tight.

 

gine is running at full speed. A too tight

 

 

 

belt can result in unintentional tine move-

5. Toadjust the length of the spring:

 

ment when the clutch bail is in the Neutral

a. Releasethe Forward Clutch Bail.

 

(released) position.

 

 

• Checkbelt tension after the first two hours of break-in operation andafter every 10 operating hours.

• At the end of each tilling season, check the belt for cracks, cuts or frayededges and replace it as soon as possible.

To Check ForwardBelt Tension:

1.Stop engine, wait for all parts to stop moving and disconnect spark plug wire.

2.With the ForwardClutch Bailinan open (released) position, measureand note the overall length of the cable spring (A, Figure

5-4) by measuringfrom the outermost coil to the outermost coil.

3. SqueezetheForwardClutch Bailagainst

Figure5-4: Tocheckforwardbelt tension, take twomeasurementsof the

overa// /ength of the coils in the spring--first with the dutch bail open,

the handlebar(see Figure 5-4) and re-

then with the dutch bail closedagainst the handlebar.

measurethe length of the coils. The belt

 

19

Image 19
Contents Formno -00585C Troy-Bilt LLC, P.O. BOX361131CLEVELAND,OHIO44136-001915/04 Findingmodelnumber Models644A SafetySafetyAlert Symbol ForwardClutchBailReverseClutchControlTiller Tiller, usingone handon the handleAvoidusing downwardpressureon Powerif thewheels are in the FreewheelBail Engaged Disengaged OperatingSymbolsHotSurfacesWarning MayheusedontedllerandengineTOOLS/ Materialsneeded AssemblyAssemblysteps InspectunitClutch Cable Install ForwardSpringand While preventingthe cable adjuster from turningAdjuster Install Reverse Clutch Cable Model 644A onlyThetiller is shipped withoutoil in the en- gine OIL LevelTires unitswithpneumatictires El-/ AUU IVlUI UH UILEngine Controls FeaturesandcontrolsWheel Drive Pins IntroductionBailE. OnlyMode1644Ahavea Reverse Handlebar Height AdjustmentForwardclutchbail ReverseclutchcontrolBREAK-INOPERATION OperationStarting and Stopping Dlebarssidewaysto turntiller Operatingthe TillerStoppingthe Tillerand Engine Thoroughlypulverizethe soil Tilling DepthsLet the Tiller Dothe Work AvoidMaking Footprints AvoidTilling Soggy,Wet SoilTilling Up and DownSlopesVertical Tilling Wahning Do not Clearingthe TinesLoading and UnloadingtheTiller Read the followingrecommendationsbeforetilling on slopesTerraceGardening Loading and Unloading TillerUnloading the tiller into a Maintenance Removethe left-side wheel BolotinesTo Drain theTransmissionGear Oil Drain the oil from the engineHandlebarsee -4 and re Checkingand AdjustingForwarddrive Belt Tension SqueezetheForwardClutch BailagainstEngine OIL Service EnginecleaningAircleanerservice Forwardclutch Bail AdjustmentOFF-SEASONSTORAGE SparkplugserviceThrottleleveradjustment Store unit in aclean, dry areaCorrection ProblemDescription M13 AForModel640C BForModel644A1418 749-04193 Bumper B 710-0395 PartnoPartno Description Front I11 Description AForModel640C BForModel644AHold TinesWith Blunt EndTowardYou Tine ShaftPage TROY-BILT LLC, P.O. Box 361131, Cleveland, Ohio 44136-0019 TROY-BILT Tiller Lifetime Limited Warranty