SECTION 7: SERVICE

About Service

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.

Troubleshooting

Motor & Electrical

Symptom

Possible Cause

Possible Solution

Machine does not start or a

1.

Plug or receptacle is at fault or wired

1.

Test power plug and receptacle for good

breaker trips.

 

incorrectly.

 

contact and correct wiring.

 

2.

Motor connection is wired incorrectly.

2.

Correct motor wiring (see Page 34).

 

3.

Power supply is faulty, or is switched

3.

Make sure all hot lines and grounds are

 

 

OFF.

 

operational and have correct voltage on all

 

 

 

 

legs.

 

4.

Safety switch key is at fault.

4.

Install or replace safety key, or replace

 

 

 

 

switch assembly.

 

5.

ON/OFF switch at fault.

5.

Replace faulty switch.

 

6.

Cable or wiring is open or has high

6.

Troubleshoot wires for internal or external

 

 

resistance.

 

breaks, check for disconnected or corroded

 

 

 

 

connections and repair or replace wiring, as

 

 

 

 

necessary.

 

7.

Motor is at fault.

7.

Test, repair or replace motor.

 

 

 

 

 

Machine stalls or is underpow-

1.

Incorrect spindle speed or feed rate.

1.

Decrease spindle speed or feed rate.

ered.

2.

Machine is undersized for the task.

2.

Use smaller drill bits/cutters and reduce the

 

 

 

 

feed rate and spindle speed.

 

3.

Bit or cutter is too large for machine.

3.

Use a smaller bit.

 

4.

Belts are slipping.

4.

Replace bad belts, align pulleys, and re-ten-

 

 

 

 

sion.

 

5.

Plug or receptacle is at fault.

5.

Test power plug and receptacle for good

 

 

 

 

contact and correct wiring.

 

6.

Motor connection is wired incorrectly.

6.

Correct motor wiring (see Page 34).

 

7.

Pulley is slipping on shaft.

7.

Replace loose pulley and shaft.

 

8.

Low power supply voltage.

8.

Make sure hot lines and grounds are opera-

 

 

 

 

tional w/correct voltage.

 

9.

Motor bearings are at fault.

9.

Rotate motor shaft for noisy or burnt bear-

 

 

 

 

ings, repair/replace as required.

 

10. Motor has overheated.

10. Clean dust off motor, let it cool, and reduce

 

 

 

 

workload on machine.

 

11. Motor is at fault.

11. Test, repair or replace motor.

 

 

 

 

 

G9969 Radial Drill Press

-29-

Page 31
Image 31
Grizzly G9969 owner manual About Service, Troubleshooting, Motor & Electrical, Symptom Possible Cause Possible Solution