Grizzly H8259, Owner'S Manual

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H8259 10" x 18" Benchtop Lathe
-25-
Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. 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.
SECTION 7: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips. 1. Plug/receptacle is at fault or wired incor-
rectly.
2. Power supply is at fault/switched
OFF
.
3. Lockout key is at fault.
4. Motor ON button or ON/OFF switch is at
fault.
5. Wiring is at fault.
6. Motor is at fault.
1. Test for good contacts; correct the wiring.
2. Ensure hot lines have correct voltage on all legs and
main power supply is switched ON .
3. Install/replace lockout key; replace switch.
4. Replace faulty ON button or ON/OFF switch.
5. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
6. Test/repair/replace.
Machine stalls or is
underpowered. 1. Plug/receptacle is at fault.
2. Motor bearings are at fault.
3. Motor has overheated.
4. Motor is at fault.
1. Test for good contacts; correct the wiring.
2. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
3. Clean off motor, let cool, and reduce workload.
4. Test/repair/replace.
Machine has vibra-
tion or noisy opera-
tion. 1. Motor or component is loose.
2. Motor fan is rubbing on fan cover.
3. Workpiece or chuck is at fault.
4. Motor bearings are at fault.
1. Inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. Replace dented fan cover; replace loose/damaged
fan.
3. Center workpiece in chuck or face plate; reduce
RPM; replace defective chuck.
4. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Symptom Possible Cause Possible Solution
Vibration noise
while machine
is running; noise
changes when
speed is changed. 1. Belt cover loose.
2. Belt cover bent or dented and is making
contact with the motor pulley or belt.
1. Tighten the belt cover lock handle; if necessary
install a soft, vibration dampening material (between
the belt cover and the headstock casting.
2. Remove belt cover and inspect the inside for dents,
bends, or indications of rubbing. Tap out the dent
with a rubber mallet, bend back into proper shape,
or shim belt cover away from the motor pulley.
Wood Lathe Operation