Troy-Bilt 634BM, 634FM manual Adjusted, reattach the spring to the For- ward Clutch Bal

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all moving partsto come to a complete stop, disconnect spark plug wire and move wire awayfrom spark plug. Failureto follow these instructions can result in serious personalinjury or property damage.

FF_ONTi

FORWARD

SHAFT

C

\

Figure5-3: Installtinessothatcuttingedgeoftinesentersoftfirstwhentillermovesforward.

h Unthreadthe hex nut IC, Figure5-4) halfway upthe adjustment screw (D_.

c.Unhookthe top of the spring from the Forward Clutch Bail.

d.Usepliers to preventthe adjuster (B_ from turning and turn the slotted screw lo- cated insidethe spring clockwise ,viewed from operator'sposition} to increaseten- sion on the spring. Turn the screw coun- terclockwise to decreasetension. Once

adjusted, reattach the spring to the For- ward Clutch Ba_l.

e.RepeatSteps2and 3to re-measure the length of the spring. Whenthe second measurementis between1/16"-to- 3/16" longerthan the first measurement,retighten the hexnut(C)againstthetop ofthe adjuster (B/.

ReplacementBelt Information

CHECKING AND ADJUSTING FORWARD DRIVE BELT TENSION

It is important to maintain correct tension on the forward drive belt. A loose beltwill causethe tinesandwheelsto slow down-- or stop completeiy -- even though the en- gine _srunning at full speed. A too tight belt can result in unintentionaltine move- ment when the clutch bail is in the Neutral (released) position.

•Check belt tension after the first two hours of break-in operationand after every 10operating hours.

•At the end of eachtilling season,check the belt for cracks, cuts or frayed edges and replace it as soon as possible.

To CheckForwardBelt Tension:

belt tension is correct if this second mea- suremenl is between1/6'-to-3/16"longer than the first measurement,

4.If the spring Lstoo short tless than 1/ 16'1the. tension is too loose. If the spring is too long _morethan 3/16'hthe. tension is too tight.

5.To adjust the length of the spring: a. Releasethe Forward Clutch Bail.

If the drive belt needsto be replaced,see your local authorized dealeror refer to the Parts List for ordering information. Use only afactory-authorized belt as an "over-

the-counter" belt may not perform satis- factorily. The procedure requires average

mechanicalability andcommonly available tools.

1.Stop engine, wait for all partsto stop mowng anddisconnect spark plug wire.

2.With the ForwardClutch Bailinan open (releasedl position,measureand note the overall length of the cable spring (A, Figure 5-4) by measuringfrom the outermost coil to the outermost coil.

3.Squeezethe ForwardClutch Bail againstthe handlebar(seeFigure5-4) and re-measurethe length of the coils. The

Figure5-4: Tocheckforwardbelt tension, take twomeasurementsof the nverell length ofthe coilsin the spring--first with the clutchbail open, then with the clutchbail closedagainst the handlebar.

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