Grizzly G9249 - Manual (Page 55)

g9249 12" x 37" Belt drive gap Bed lathe
-53-
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. emergency stop button is engaged, or is at
fault.
2. Change gear door, headstock cover, or
chuck guard open tripping safety switch.
3. plug or receptacle is at fault or wired
incorrectly.
4. start capacitor is at fault.
5. Contactor not getting energized or has burnt
contacts.
6. Wall fuse or circuit breaker is blown or
tripped.
7. Motor connection is wired incorrectly.
8. power supply is at fault, or is switched
oFF.
9. Motor on button is at fault.
10. Centrifugal switch is at fault.
11. spindle switch is at fault.
12. Cable or wiring is open or has high
resistance.
13. Motor is at fault.
1. rotate the emergency stop button clockwise until it
pops out, or replace faulty emergency stop button.
2. Make sure the change gear door is closed and
secure, the headstock cover is all the way down,
and the chuck guard is in the proper operational
position.
3. test power plug and receptacle for good contact and
correct wiring.
4. test capacitor and replace if necessary.
5. test for power in and out on all legs, and contactor
operation; replace if faulty.
6. Make sure circuit breaker/fuse is sized correctly for
machine load; replace faulty breaker.
7. Correct motor wiring ( Page 66).
8. Make sure all hot lines and grounds are operational
and have correct voltage.
9. replace faulty motor on button.
10. Adjust/replace.
11. test; replace if necessary.
12. troubleshoot wires for internal/external breaks;
check for disconnected or corroded connections;
repair or replace faulty wiring or connections.
13. test/repair/replace.
Machine has
vibration or noisy
operation.
1. Motor or component is loose.
2. V-belt(s) worn, damaged, or loose.
3. Motor fan is rubbing on fan cover.
4. pulley set screws or keys are missing or
loose.
5. Machine is incorrectly mounted to floor.
6. Cutting tool is chattering.
7. Workpiece or chuck is at fault.
8. spindle bearings are at fault.
9. Motor bearings are at fault.
10. gears are at fault.
1. inspect/replace stripped or damaged fasteners;
re-tighten with thread locking fluid.
2. replace/re-tension V-belts ( Page 51).
3. repair/replace dented fan cover or fan.
4. inspect set screws/keys; replace/tighten if
necessary.
5. re-tighten/replace machine mounting hardware as
necessary; use shims where required.
6. re-sharpen/replace cutting tool; index tool to
workpiece; use correct feed rate and spindle speed.
7. re-center and properly secure workpiece in chuck or
faceplate; replace defective chuck/faceplate.
8. tighten/replace spindle bearings.
9. rotate motor shaft to check for noisy or burnt
bearing; repair/replace as necessary.
10. replace bad gears/bearings.