| 
 | OVERHEATING (continued) | 
| CAUSE | CHECK AND REMEDY | 
| High room temperature. | Improve ventilation. | 
| Insufficient circulation. | Provide  | 
| Low power factory. | Reduce inductive loads or install power factor im- | 
| 
 | provement capacitors. | 
| Unbalanced load | The load on each leg should be as evenly balanced | 
| 
 | as possible and should not exceed the rated cur- | 
| 
 | rent on any leg. | 
| Dry bearing. | Replace bearing. | 
| 
 | MECHANICAL NOISE | 
| CAUSE | CHECK AND REMEDY | 
| Defective bearing. | Replace bearing. | 
| Rotor scrubbing on stator. | Bad bearing; replace. Bent shaft, return to factory. | 
| 
 | Loosen end bell, tighten; loose drive discs, tighten. | 
| Loose laminations. | Return to factory. | 
| Loose or misaligned coupling. | Tighten or align. | 
| GENERATOR FRAME PRODUCES SHOCK WHEN TOUCHED | |
| CAUSE | CHECK AND REMEDY | 
| Static charge. | Ground generator frame. | 
| Grounded armature or field coil. | Return to factory for repair. | 
20