Troy-Bilt 31/2 HP - Manual (Page 29)

MAINTENANCE
12. Align the holes in the hub of the small sprocket
with the hole through the left-hand side of the jack-
shaft. Insert the spirol pin into these holes and use
the V 4 -inch straight punch and hammer to drive the
spirol pin back into these holes.
Photo 5-20: DrMng the spirol pin back into the jackshaft
sprocket/jackshaft.
13. Adjust the wheel drive system. See “Wheel Drive
Adjustment (General)”.
14. Reinstall the wheel drive belt cover to the right-
hand side of the mower. Use the 5/16-inch wrench to
securely tighten the bolts that secure the pulley cover
in place.
15. Reinstall the hood to the side plates and rear
hood. Securely tighten the six bolts that secure it in
place.
16. After several hours of operation you may have to
adjust the wheel drive system again (due to the belt’s
having become seated on the pulleys). Refer to “Wheel
Drive Adjustment (General)”.
Wheel Drive Adjustment (General)
If you have replaced any of the wheel drive system
components (belt, control cable, control lever, idler
arm spring, etc.) you wili need to perform the Initial
Setting (described on Page 28) prior to performing
the Wheel Drive Check (described below).
If you have not replaced any of the wheel drive
system components and the wheel drive system is
not operating properly, perform the Wheel Drive Check
prior to making the Main Adjustment (described on
Page 28).
Wheel Drive Check
^WARNING
You are about to perform an operational check.
Be sure that:
• You perform this check outdoors.
• The plastic blade protector is installed on the
blade.
• No children or other bystanders are nearby.
• You perform this check in an open area, such
as a driveway.
• The mower is pointed is a safe direction.
Failure to follow these instructions could result in
personal injury or property damage.
1. Move the mower to a hard-surfaced, clean, level
area (such as a driveway). Point the mower in a safe
direction.
2. Start the mower’s engine and allow it to warm up.
3. Quickly squeeze and release the Wheel Drive
Lever. The wheels should begin to turn when you
squeeze the lever. They should stop when you release
the lever. If they don’t stop, the tension on the wheel
drive cable is too high.
A warning
If the wheels do not stop turning when the Wheel
Drive Lever is released, shut the engine off, dis­
connect the spark plug wire, and do not operate
the mower until this problem has been repaired.
Failure to do so could result in personal injury or
property damage.
4. Re-engage the Wheel Drive Lever while you pre­
vent the mower from moving forward by firmly holding
the handlebars. The wheels should spin on the drive­
way. If they do not spin, the tension on the wheel drive
cable is too low.
5. If the mower fails this Check, proceed to the Main
Adjustment on the next page.
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