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Section 7: Troubleshooting
3/17/20
37
Section 7: Troubleshooting
Troubleshooting Chart
Problem
Cause
Solution
Digging into electrical, gas,
water, and cable lines
Not locating utility lines before digging.
Call Dig Safe (811). Have utility companies
flag location of underground utilities before
digging.
Carbide cutting tips on end of
teeth are missing
Cutting teeth are installed on the cutting
wheel backwards.
Replace teeth with missing carbide tips.
Install teeth with carbide tips leading.
Cutting wheel turns too slow
Not operating power take-off at 540 rpm.
Increase power take-off speed to 540 rpm
before starting cut.
Cutting wheel won’t turn
Not operating power take-off at 540 rpm.
Increase power take-off speed to 540 rpm
before starting cut.
Power take-off is not engaged.
Engage power take-off.
Slip clutch is slipping.
Tighten clutch springs to the correct length.
Do not over tighten. If spring length is
correct, replace slip clutch disks.
Cutting wheel stops turning
Making deep cuts in the stump.
Make shallower cuts in the stump.
Stump is made of a very hard wood or has
hardened with age.
Take smaller bites out of the stump and go
slower while articulating the cutting head
across the top of the stump.
Cutting teeth are installed backwards.
Turn cutting teeth around.
Carbide tips are dull.
Rotate carbide tips one-third of a turn. If
teeth are dull all around the circumference,
replace teeth with new teeth.
Slip clutch is slipping.
Tighten clutch springs to the correct length.
Do not over tighten. If spring length is
correct, replace slip clutch disks.
Carbide tips are missing.
Replace missing tips with new tips.
Hydraulic hoses are stretched
and/or damaged
Hydraulic hoses are catching on tree limbs,
debris, or other solid objects.
Replace hydraulic hoses. Stay away from
objects that can catch on hydraulic hoses.
Stop immediately if hoses are catching on
an object and remove object. If helpful,
readjust hose routing.
Hoses are too short.
Make longer hoses.
Hydraulic fittings are
damaged
Hydraulic hoses are catching on tree limbs,
debris, or other solid objects causing fittings
to become damaged.
Replace hydraulic fittings. Stay away from
objects that can catch on hydraulic hoses.
Stop immediately if hoses are catching. If
helpful, readjust hose routing.
Stump Grinder vibrates
excessively
Solenoid needle valves not adjusted
properly.
Adjust solenoid needle valves.
Backing up while making a cut.
Don’t move tractor while making a cut.
If available, set tractor park brake.
Making deep cuts in the stump.
Make shallower cuts in the stump.