Section 7: Service; Troubleshooting Guide - Grizzly G0477 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix your machine if a problem develops. If you
need replacement parts or you are unsure of your repair skills, then feel free to call our Technical Support
at (570) 546-9663.
Motor & Machine Operation
Symptom
Motor will not start.
Fuses or circuit breakers blow.
Motor fails to develop full power
(output of motor decreases rapidly
with decrease in voltage at motor
terminals).
Motor overheats.
Motor stalls or shuts off during a
cut.
Cutterhead slows or squeals when
cutting, especially on start-up.
Loud repetitious noise coming from
machine.
Vibration when running or cutting.
Model G0477 15" Planer/Moulder

Troubleshooting Guide

Possible Cause
1. Machine circuit breaker has tripped.
2. Low voltage.
3. Open circuit in motor or loose connec-
tions.
1. Short circuit in line cord or plug.
1. Power line overloaded with lights,
appliances, and other motors.
2. Undersized wires or circuits too long.
3. Worn motor brushes.
1. Motor overloaded during operation.
2. Air circulation through the motor
restricted.
1. Motor overloaded during operation.
2 Machine circuit breaker has tripped.
3. Short circuit in motor or loose connec-
tions.
4. External circuit breaker tripped.
5. Worn motor brushes.
1. Belt(s) stretched or worn out.
1. Pulley set screws or keys are missing
or loose.
2. Dust collector fan is hitting the cover.
3. Belt(s) damaged.
1. Loose or damaged moulding or plan-
ing knife.
2. Damaged belt(s).
3. Worn cutterhead bearings.
Possible Solution
1. Press the circuit breaker reset button; inves-
tigate reason it tripped to prevent future
problems.
2. Check power line for proper voltage.
3. Inspect all lead connections on motor for
loose or open connections.
1. Repair or replace cord or plug for damaged
insulation and shorted wires.
1. Reduce load on power line.
2. Increase wire sizes or reduce length of the
circuit.
3. Replace motor brushes (Page 29)
1. Reduce cutting load; take lighter cuts.
2. Clean out motor, fan and dust collection
ducting to provide normal air circulation.
1. Reduce cutting load; take lighter cuts.
2. Press the circuit breaker reset button.
3. Repair or replace connections on motor for
loose or shorted terminals or worn insula-
tion.
4. Install correct circuit breaker; reduce # of
machines running on that circuit.
5. Replace motor brushes (Page 29)
1. Replace belt(s) (Page 28)
1. Inspect keys and set screws. Replace or
tighten if necessary.
2. Adjust fan cover mounting position, tighten
fan, or shim fan cover.
3. Replace belt(s) (Page 28)
1. Tighten or replace knife or blade.
2. Replace belt(s) (Page 28)
3. Check/replace cutterhead bearings.
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