Checking And Adjusting The Tine Drive Belt Tension; Belt Tension Adjustment; Change Forward/Reverse Tine Drive Belts - Champion 100379 Operator's Manual

100379 - FRONT TINE TILLER
Checking and Adjusting the Tine Drive Belt
Tension
It is important to maintain correct tension on the forward and
reverse tine drive belt drive. A loose belt will cause the tines to
slow down — or stop completely — even though the engine is
running at full speed. A too-tight belt can result in unintentional
tine movement when the lever is in the Neutral (released)
position.
– Check belt tension after the first two hours of break-in
operation and after every 10 operating hours.
– At the end of each tilling season, check the belt for cracks,
cuts or frayed edges, and replace it as soon as possible.
To Check Belt Tension:
1. Stop engine, wait for all parts to stop moving and
disconnect spark plug wire.
2. With the forward and reverse lever in an open (released)
position, measure the distance of travel in the lever before
the belt fully engages the pulley, if it is more than 5/8" of
an inch the belt is too loose and needs tightened.
FORWARD LEVER
REVERSE LEVER
3. To adjust the length of the spring.
3a. Un-thread the hex nut halfway up the adjustment
screw.
3b. Unhook the top of the spring from the lever.
3c. Use pliers to prevent the adjuster from turning and turn
the slotted screw located inside the spring clockwise
(viewed from operator's position) to increase tension
on the spring. Turn the screw counter-clockwise to
decrease tension. Once adjusted, reattach the spring
to the lever.
3d. Repeat Steps 2 and 3 to re-measure the length of the
spring. When the second measurement is between
1/16 in. to 3/16 in. (2 to 5 mm) longer than the first
measurement, re-tighten the hex nut against the top of
the adjuster.
Replacement Belt Information
If the drive belt needs to be replaced, refer to the parts list for
information. The procedure requires average mechanical ability
and commonly available tools to change or replace.
LENGTH (inches)
17X1070 24 in. ± 0.24 in.
Z914 29 in. ± 0.20 in.
LENGTH (mm)
17X1070 1070.0 ± 8.0 mm
Z914 914.0 ± 8.0 mm

Belt Tension Adjustment

Loosen the nuts holding the tine engagement cable to the tiller
body. Move the cable away from the drive pulley to tighten belt
tension or toward the drive pulley to decrease belt tension, re-
tighten the nuts.
To increase belt tension:
MAINTENANCE
WIDTH (inches)
0.95 in. ± 0.01 in.
0.70 in. ± 0.02 in.
WIDTH (mm)
17.0 ± 0.40 mm
9.5 ± 0.50 mm
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