Troy-Bilt 644H Position, jR:_, Checkingand Adjusting Forwarddrive Belttension, 1-7/8, Maintenance

Section5: Maintenance

WARNINGBefore inspecting, cleaning or servicing the unit, shut off engine, wait for all t

parts to come to a completestop, disconnectspark plug wire and move wire away from spark ._L..I plug. Failure to foilow these instructions can resuit in serious personai injury or propertydamage.

OPERATOR C

POSITION

TINE

A

jR:"_

ENGINE

Figure5-3: Tines,tineholdersandinstallationhardware.

Figure 5-4: Lift bail and checklength of ClutchBail Spring to checkfor correct belt tension

(1-7/8").

Clutch Bailall the way upto the bottom of the upper handlebars,you will needto loosen the belt tension.

Also check the belt for cracks, cuts or frayed edges and replace it as soon as possible.

•Checkbelt tension after the first two hours of initial operation (new belt).

•Checkbelt tension after every 10 operating hours.

To CheckForwardBelt Tension:

1.Besure that the engine is stopped and

the spark plug wire is disconnectedand moved awayfrom the spark plug.

2.Loosen nut "C" (Figure 5-4) several turns so it is about halfway up the threaded adjustment screw.

3.Lift the Forward Clutch Bail upand hold it to the bottom of the handlebars.

Measurethe length of the clutch bail spring (A, Figure 5-4) with a ruler. If the belt tension is correct, the length of the coiled portion of the spring should be approximately 1-7/8". Nut "C" should then besnugged down against the top of the adjuster (B).

4.If the spring is too short, the belt tension will betoo loose. If the spring is too long, the belt tension will be too tight.

5.To adjust the length of the spring, releasethe ForwardClutch Bail. Thread

the hex nut (C, Fig. 5-4) halfway upthe adjustment screw. Turn the screw inside the spring (A, Figure 5-4) counterclock- wise (as viewed from the operator's position) while holding the adjuster (B) steadyto increasethe length of the spring, or turn clockwise (as viewedfrom the operator'sposition) to decreasethe

CHECKINGAND ADJUSTING FORWARDDRIVE BELTTENSION

Maintaining correct tension on the forward drive belt is important to good tilling performance and long belt life. A loose belt will slip on the engine and

transmission pulleysand cause the tines and wheelsto slow down - or stop com- pletely - even though the engine is running at full speed. A loose belt can also result in premature belt wear.

If youfind you can not bring the Forward

length of the spring.

NOTE:If you have difficulty holding the adjuster steady by hand, use a pliers or wrench on the adjuster. While you turn the screw, keepthe ForwardClutch Cable

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