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Husqvarna 968999239 Operator's Manual page 44

Stump grinder
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Problem
Belt coming off.
Belt engages late
or slips.
Belt not staying tight
after adjustment.
The cutting wheel
does not rotate.
The cutting wheel
continues to rotate.
The parking brake is
slipping.
44
TROUBLESHOOTING
Possible solutions
1. Pulleys not aligned.
2. Belt tension is insufficient. Adjust belt tension.
1. Tighten the belt as described in the operator's manual.
2. Reduce cutting depth.
1. Check for damage on the axle, pulley or key. Make sure
that the setscrews are properly tightened.
2. Replace damaged parts.
1. Engine speed is insufficient to activate the centrifugal clutch.
Make sure the throttle cable is working properly.
2. Belt tension is insufficient. Adjust belt tension.
3. Clutch is worn - replace shoes and springs, and/or clutch bearings.
1. Check that the throttle is disconnected.
2. Check for damage on the throttle cable.
3. Check that the throttle cable is properly mounted on the throttle
valve.
4. The engine speed is not under 1000 rpm, which is required
to disengage the centrifugal clutch.
5. Inspect springs on clutch shoes. If tension on clutch shoes is not
enough to pull shoes back, replace springs and clutch shoes.
1. Adjust the brake tension in the manner described in the
operator's manual.
2. Check for damage on the brake rod or lever.
3. Check for wear on the brake pads. Replace as necessary.

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