Grizzly G0763 Manuale Utente

-38-

Model G0763 (Mfg. Since 8/13)

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you 
need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663. 

Note: Please gather the serial number and manufacture date of your machine before calling.

Motor will not start.

1.  Power supply switched 

OFF or has 

incorrect voltage.

2.  Blown fuse/tripped circuit breaker at main 

panel.

3.  Break or short in wiring; or loose 

connections.

4.  ON/OFF switch at fault.
5.  Motor connection wired incorrectly.
6.  Motor at fault.

1.  Switch power supply 

ON or verify voltage.

2.  Correct the cause of overload, then reset/replace 

fuse or breaker.

3.  Trace/replace broken or corroded wires; fix loose 

connections.

4.  Replace switch.
5.  Wire motor correctly (

Page 44).

6.  Test for shorted windings, bad bearings, and repair 

or replace.

Machine has 
excessive vibration 
or noise.

1.  Motor fan rubbing on fan cover.

2.  Motor is loose.
3.  Grinding wheel out of balance.

4.  Motor bearings worn or damaged.

1.  Fix/replace fan cover; replace loose or damaged 

fan.

2.  Tighten any loose fasteners.
3.  Inspect, ring test, balance, and dress grinding 

wheel.

4.  Replace motor bearings or replace motor.

Machine stalls 
or slows when 
operating. 

1.  Motor is being overloaded.
2.  Motor at fault.

1.  Reduce depth of cut.
2.  Test for shorted windings, bad bearings, and repair 

or replace.

Handwheel binds or 
is difficult to move.

1.  Ways/ball bearing strips need lubrication.
2.  Gears/rack and pinion are worn.

1.  Relubricate ways/ball bearing strips (

Page 36).

2.  Replace gears/rack and pinion.

Vibration when 
grinding, poor 
surface finish, 
or incorrect final 
dimensions.

1.  Grinding wheel is out-of-round, loaded up 

with material, or damaged.

2.  Missing or torn grinding wheel paper 

washers.

3.  Incorrect grinding wheel hardness or grit 

rating.

4.  Improperly installed magnetic chuck.

5.  Workpiece is loose.
6.  Loose machine component.

7.  Ways/ball bearing strips need lubrication.
8.  Grinding wheel has varying densities, or is 

of poor quality.

9.  Coolant is incorrect or incorrectly mixed.

10. Motor or motor bearings at fault.

1.  Inspect, ring test, dress, and balance grinding 

wheel.

2.  Remove and replace paper washers, then inspect, 

ring test, balance, and dress grinding wheel.

3.  Match wheel grade and grit rating with workpiece 

hardness.

4.  Stone table and chuck surfaces, and remove all 

burrs and foreign material from mating surfaces, 
and reinstall the chuck.

5.  Replace or repair chuck for poor holding power.
6.  Inspect all machine connections, and tighten any 

loose fasteners.

7.  Relubricate ways/ball bearing strips (

Page 36).

8.  Replace grinding wheel with acceptable brand.

9.  Refer to coolant manufacturer's workpiece verses 

coolant type recommendations and correct coolant.

10. Replace motor or replace bearings.

Power feed unit will 
not start.

1.  Power feed unit fuse is blown.

1.  Replace fuse.