Grizzly G0554 - Manual (Page 51)

G0554 Gear-Head Floor Lathe
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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.
SECTION 7: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips. 1. Fuse has blown.
2. Plug/receptacle is at fault or wired incorrectly.
3. Start capacitor is at fault.
4. Emergency stop push-button is engaged/
faulty.
5. Motor connection wired incorrectly.
6. Thermal overload relay has tripped.
7. Contactor not getting energized/has burnt con-
tacts.
8. Wall fuse/circuit breaker is blown/tripped.
9. Power supply is at fault/switched OFF.
10. Motor ON button or ON/OFF switch is at fault.
11. Wiring is open/has high resistance.
12. Motor is at fault.
13. Spindle rotation switch is at fault.
14. Foot brake is engaged.
15. Foot brake safety switch is faulty.
1. Correct short/replace fuse on board/control panel.
2. Test for good contacts; correct the wiring.
3. Test/replace if faulty.
4. Rotate clockwise slightly until it pops out/replace it.
5. Correct motor wiring connections.
6. Turn cut-out dial to increase working amps and push
the reset pin. Replace if tripped multiple times (weak
relay).
7. Test for power on all legs and contactor operation.
Replace unit if faulty.
8. Ensure correct size for machine load; replace weak
breaker.
9. Ensure hot lines have correct voltage on all legs and
main power supply is switched ON.
10. Replace faulty ON button or ON/OFF switch.
11. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
12. Test/repair/replace.
13. Turn switch to FWD/REV; replace bad switch.
14. Check to see that foot brake is up.
15. Test, replace if needed.
Loud, repetitious
noise
coming
from machine
at or near the
motor.
1. Pulley setscrews or keys are missing or
loose.
2. Motor fan is hitting the cover.
1. Inspect keys and setscrews. Replace or tighten if
necessary.
2. Tighten fan or shim cover, or replace items.
Motor overheats. 1. Motor overloaded.
2. Air circulation through the motor restricted. 1. Reduce load on motor.
2. Clean out motor to provide normal air circulation.
Motor is loud
when cutting.
Overheats or
bogs down in the
cut. 1. Excessive depth of cut or feed rate.
2. RPM or feed rate wrong for cutting operation.
3. Cutting tool is dull.
4. Gear setup is too tight, causing them to bind. 1. Decrease depth of cut or feed rate.
2. Refer to RPM feed rate chart for appropriate rates.
3. Sharpen or replace the cutting tool.
4. Readjust the gear setup with a small amount of
backlash so the gears move freely and smoothly
when the chuck is rotated by hand.