SP4012 TROUBLE SHOOTING GUIDE
32
COMPLAINT
CAUSE CORRECTION
Cutter wheel stops turning.
• Belt not engaged.
• Engine belt broke.
• Poly chain
®
belt broke.
• Sheared key in shaft.
• Broke cutter wheel shaft.
• Adjust yoke assembly.
• Replace belt.
• Replace belt.
• Replace key.
• Replace shaft.
Roar in machine when cutter
wheel is engaged.
• Belt guards rubbing on
jackshaft or cutter wheel
shaft.
• Jackshaft or cutter wheel
bearings going bad.
• Re-position guards off of
shafts.
• Replace bearings.
Traction loss of power.
• Open free wheel valve.
• Worn free wheel valve.
• Relief valve set too low.
• Broken drive chain.
• Hydraulic motor worn.
• Close free wheel valve.
• Replace free wheel valve.
• Increase relief valve
pressure by turning relief
valve screw inward.
• Replace chain.
• Replace Hydraulic motor.
Bearing will not take grease.
• Grease fitting clogged. • Replace fitting.
Cutter head swings faster one
way than the other.
• Counter balance valve is
out of adjustment.
• Adjust counter balance
valve to equalize swing
speed.
For all Radio Transmitter or Receiver problems, see the Radio Control Manual included at
the back of this manual.
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