Grizzly G7945 - Manual (Page 35)

G7945/G7946 Radial Drill Press
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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
About Service
Symptom Possible Cause Possible Solution
Machine does not start or a breaker trips. 1. Plug or receptacle is at fault or wired
incorrectly.
2. Start capacitor is faulty.
3. Motor connection is wired incorrectly.
4. Power supply is faulty, or is switched
OFF.
5. Safety switch key is at fault.
6. ON/OFF switch is faulty.
7. Cable or wiring is open or has high
resistance.
8. Motor is at fault.
1. Test power plug and receptacle for
good contact and correct wiring.
2. Replace capacitor.
3. Correct motor wiring (see
Page 37).
4. Make sure all hot lines and grounds
are operational and have correct volt-
age on all legs.
5. Install or replace safety key, or replace
switch assembly.
6. Replace faulty switch.
7. Troubleshoot wires for internal or
external breaks, check for discon-
nected or corroded connections and
repair or replace wiring.
8. Test, repair or replace motor.
Machine stalls or is underpowered. 1. Incorrect spindle speed for task.
2. Machine is undersized for the task.
3. Bit or cutter is dull.
4. Low power supply voltage.
5. Belt is slipping.
6. Plug or receptacle is at fault.
7. Motor connection is wired incorrectly.
8. Pulley is slipping on shaft.
9. Bearings are at fault.
10. Motor has overheated.
11. Motor is at fault.
1. Decrease spindle speed.
2. Use smaller drill bits/cutters and
reduce the feed rate and spindle
speed.
3. Sharpen/replace bit or cutter.
4. Make sure hot lines and grounds are
operational w/correct voltage.
5. Replace bad belt, align pulleys, and
re-tension.
6. Test power plug and receptacle for
good contact and correct wiring.
7. Correct motor wiring (see Page 37).
8. Replace loose pulley and shaft.
9. Rotate motor and spindle shaft for
noisy or burnt bearings, repair/replace
as required.
10. Clean inside/outside of motor, let cool,
and reduce workload on machine.
11. Test, repair or replace motor.
Troubleshooting
Motor & Electrical