Grizzly G0643, Owner'S Manual

Page: 28 / 52

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Model G0643 21-Bit Line Boring Machine
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. Headstock safety limit switch is not properly
adjusted or is at fault.
2. Fuse has blown.
3. Plug/receptacle is at fault or wired incor-
rectly.
4. Start capacitor is at fault.
5. Emergency stop push-button is engaged/
faulty.
6. Motor connection wired incorrectly.
7. Wall fuse/circuit breaker is blown/tripped.
8. Thermal overload relay has tripped.
9. Contactor not getting energized/has burnt
contacts.
10. Power supply switched OFF or is at fault.
11. Wiring is open/has high resistance.
12. Power ON button is at fault.
13. Centrifugal Switch is at fault.
14. Motor is at fault.
1. Re-adjust the headstock safety limit switch (see
Page 28
), or replace.
2. Correct short/replace fuse inside electrical box.
3. Test for good contacts; correct the wiring.
4. Test/replace if faulty.
5. Rotate clockwise slightly until it pops out/replace it.
6. Correct motor wiring connections.
7. Ensure circuit size is suitable for this machine;
replace weak breaker.
8. Turn cut-out dial to increase working amps and push
the reset pin. Replace if tripped multiple times (weak
relay).
9. Test for power on all legs and contactor operation.
Replace unit if faulty.
10. Ensure power supply is switched on; ensure power
supply has the correct voltage.
11. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
12. Replace faulty ON button switch.
13. Adjust/replace the centrifugal switch if available.
14. Test/repair/replace.
Machine has vibra-
tion or noisy opera-
tion. 1. Motor or component is loose.
2. Motor mount loose/broken.
3. Machine is incorrectly mounted or sits
unevenly on floor.
4. Motor fan is rubbing on fan cover.
5. Motor/boring head bearings are at fault.
6. Centrifugal switch is faulty.
7. Chuck or boring bit is at fault.
1. Inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. Tighten/replace.
3. Tighten/replace anchor studs in floor; relocate/shim
machine.
4. Replace dented fan cover; replace loose/damaged
fan.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Replace.
7. Replace out-of-round chuck,dull, or bent boring bit.
troubleshooting