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Check Drive Belt Tensioner
--- every 1000 hours or one year
1. Park the machine on level ground, apply the parking
brake, lower the attachment to the ground, and
stop the engine. Remove the key and tag "Do Not
Operate".
2. Open the side cover to access the engine.
3. Check the belt deflection at the longest span of belt
(1).
The deflection must be checked at the center of the
span.
The maximum deflection allowed in the belt is 9.5 to
12.7 mm (3/8 to 1/2 in).
f
NOTE: The belt tension is automatically adjusted by the
belt tentioner. No adjustment is necessary.
4. With the belt installed, verify that neither tensioner
arm stop is in contact with the spring casing stop.
If either stop is touching, drive belt (1) must be
replaced.
After replacing the belt, if the tensioner arm stops
are still in contact with the spring case stop, the belt
tensioner must be replaced.
5. Check tensioner (2) for cracks on arm, pulley, and
stops. If any cracks are observed, the tensioner must
be replaced.
f
NOTE: Consult your nearest authorized dealer for the
tentioner replacement.
6. Check belt tensioner pulley (3) for any dirt or damage.
If ir is dirty or damaged, contact your nearest
authorized dealer for cleaning or replacement.
7. Check the location of drive belt on belt tensioner
pulley (3).
The belt must be centered on, or close to the middle
of, the pulley.
Misaligned belts, either too far forward or backward,
can cause belt wear, belt roll-off failures, or increase
uneven tensioner bushing wear.
MAINTENANCE
2
7-79
3
2
3
1
90Z7B-7-77-1
1
90Z7B-7-77-2
1
90Z7B-7-77-3
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Troubleshooting
