Troy-Bilt 630CN manual Checkingandadjusting, Forwarddrivebelttension, ReplacementBelt Information

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plugwire and move wire awayfrom spark plug. Failureto follow these instructions can result in serious personal injury or property damage.

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

c. Unhookthe top of the spring from

		the Forward Clutch Bail.
	FRONT/	d. Usepliers to preventthe adjuster _B_
		from turning and turn the slotted screw lo-
	FORWARD
		cated inside the spring clockwise _viewed
		from operator'spositiom to increaseten-
		sion on the spring. Turn the screw coun-
		terclockwise to decreasetension. Once
		adjusted, reattach the spring to the For-
C		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 of the adjuster
		_B/.
Figure5-3: Installtinessothatcuttingedgenf tinesentersoilfirstwhentillermovesforward,		ReplacementBelt Information
		If the drive belt needsto be replaced,see
CHECKINGANDADJUSTING	belt tension is correct if this second mea-	your local authorized dealeror refer to the
FORWARDDRIVEBELTTENSION	suremenl is between1/6"-to- 3/16"longer	Parts List for ordering information. Use
It is important to maintain correct tension	than the first measurement,	only afactory-authorized belt as an "over-
	4. If the spring Lstoo short tless than 1/	the-counter" belt may not perform satis-
on the forward drive belt. A loose beltwill
	16'3the. tension is too loose. If the spring	factorily. The procedure requires average
causethe tinesandwheelsto slow down--
	is too long _morethan 3/16"_.the tension	mechanicalability andcommonly available
or stop completeiy i eventhough the en-
	is too tight.	tools.
gine _srunning at full speed. A too tight
	5. To adjust the length of the spring:
belt can result in unintentional tine move-
ment when the clutch _ailis in the Neutral	a. Releasethe Forward Clutch Bail.
_releasedlposition.

• Check belt tension after the first two hours of break-in operation andafter 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:

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

2.With the ForwardClutch Bailinan open (releasedl pos_t_on,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 Ba	Figure5-4: Tocheckforwardbelt tension, take twomeasurementsof the
	overall length ofthe coilsin the spring-- first with the clutchbail open,
againstthe handlebar(seeFigure5-4) and	then with the clutchbail closedagainst the handlebar.
re-measurethe length of the coils. The

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