
SECTION 7: SERVICE
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)
Troubleshooting
Symptom | Possible Cause | Possible Solution | |||
Motor will not start. | 1. | Power supply switched OFF or has | 1. | Switch power supply ON or verify voltage. | |
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| incorrect voltage. |
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| 2. | Blown fuse/tripped circuit breaker at main | 2. | Correct the cause of overload, then reset/replace | |
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| panel. |
| fuse or breaker. | |
| 3. | Break or short in wiring; or loose | 3. | Trace/replace broken or corroded wires; fix loose | |
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| connections. |
| connections. | |
| 4. | ON/OFF switch at fault. | 4. | Replace switch. | |
| 5. | Motor connection wired incorrectly. | 5. | Wire motor correctly (Page 44). | |
| 6. | Motor at fault. | 6. | Test for shorted windings, bad bearings, and repair | |
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| or replace. | |
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Machine has | 1. | Motor fan rubbing on fan cover. | 1. | Fix/replace fan cover; replace loose or damaged | |
excessive vibration |
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| fan. | |
or noise. | 2. | Motor is loose. | 2. | Tighten any loose fasteners. | |
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| 3. | Grinding wheel out of balance. | 3. | Inspect, ring test, balance, and dress grinding | |
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| wheel. | |
| 4. | Motor bearings worn or damaged. | 4. | Replace motor bearings or replace motor. | |
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Machine stalls | 1. | Motor is being overloaded. | 1. | Reduce depth of cut. | |
or slows when | 2. | Motor at fault. | 2. | Test for shorted windings, bad bearings, and repair | |
operating. |
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| or replace. | |
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Handwheel binds or | 1. | Ways/ball bearing strips need lubrication. | 1. | Relubricate ways/ball bearing strips (Page 36). | |
is difficult to move. | 2. | Gears/rack and pinion are worn. | 2. | Replace gears/rack and pinion. | |
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Vibration when | 1. | Grinding wheel is | 1. | Inspect, ring test, dress, and balance grinding | |
grinding, poor |
| with material, or damaged. |
| wheel. | |
surface finish, | 2. | Missing or torn grinding wheel paper | 2. | Remove and replace paper washers, then inspect, | |
or incorrect final | |||||
| washers. |
| ring test, balance, and dress grinding wheel. | ||
dimensions. |
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3. | Incorrect grinding wheel hardness or grit | 3. | Match wheel grade and grit rating with workpiece | ||
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| rating. |
| hardness. | |
| 4. | Improperly installed magnetic chuck. | 4. | Stone table and chuck surfaces, and remove all | |
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| burrs and foreign material from mating surfaces, | |
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| and reinstall the chuck. | |
| 5. | Workpiece is loose. | 5. | Replace or repair chuck for poor holding power. | |
| 6. | Loose machine component. | 6. | Inspect all machine connections, and tighten any | |
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| loose fasteners. | |
| 7. | Ways/ball bearing strips need lubrication. | 7. | Relubricate ways/ball bearing strips (Page 36). | |
| 8. | Grinding wheel has varying densities, or is | 8. | Replace grinding wheel with acceptable brand. | |
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| of poor quality. |
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| 9. | Coolant is incorrect or incorrectly mixed. | 9. | Refer to coolant manufacturer's workpiece verses | |
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| coolant type recommendations and correct coolant. | |
| 10. Motor or motor bearings at fault. | 10. Replace motor or replace bearings. | |||
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Power feed unit will | 1. | Power feed unit fuse is blown. | 1. | Replace fuse. | |
not start. |
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| Model G0763 (Mfg. Since 8/13) |