7. TROUBLESHOOTING
PROBLEM
CHECK
SOLUTION
Cutting wheel does not spin.
Cutting wheel jammed.
Remove material from
cutting wheel.
Verify PTO drive line is connected
properly.
Connect drive line to tractor.
Slip clutch is slipping.
Remove jam from cutting
wheel.
Cutting wheel does not have
much power.
Slip clutch is slipping.
Check to determine if
the slip clutch is hot. Use
Caution: This Can Be Very
Hot! A hot clutch does NOT
grip.
Slippage on the clutch
occurs if there is more
power than the unit is rated
for: Model 3P24 is rated
for 20-60 hp input. Model
3P34 is rated for 50-80 hp
input. A bigger tractor can
be used if it is idled down
as this will decrease the
output power of the engine.
Take smaller passes (less
cutting) to decrease the
strain on the clutch.
Turn the flow control knob
to a lower number (1) to
reduce the strain on the slip
clutch.
Be careful when tightening
the tension setting on the
slip clutch as this could put
excess strain on the gear
box.
Tractor is not able to lift grinder.
Tractor is too small.
Move link pins to the top
position on the stump
grinder to add leverage.
Cutting wheel cannot be lifted
high enough.
Stump too tall.
Cut stump shorter.
Shorten top link on 3-point
hitch.
Cutting wheel cannot be lowered
far enough.
Top link not correct length.
Lengthen top link on 3-point
hitch.
No movement on cylinders.
No oil flow.
Check for plugged or
reversed hydraulic lines.
Adjustment valve is closed.
Open adjustment valve.
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