Quarterly service - AC induction motor (industrial)
Estimated duration: 1 - 1.5 hours • Frequency: every 3 months
Equipment Details
| # | Service Action | Type | Done | Notes |
|---|---|---|---|---|
| Bearings | ||||
| 1 | Check bearing temperature (drive end) | MEASURE | ☐ | |
| 2 | Check bearing temperature (non-drive end) | MEASURE | ☐ | |
| 3 | Measure vibration velocity mm/s (drive end bearing) | MEASURE | ☐ | |
| 4 | Measure vibration velocity mm/s (non-drive end bearing) | MEASURE | ☐ | |
| 5 | Lubricate bearings (grease per manufacturer spec - type and quantity) | GREASE | ☐ | |
| Electrical | ||||
| 6 | Measure running amps - Phase L1 | MEASURE | ☐ | |
| 7 | Measure running amps - Phase L2 | MEASURE | ☐ | |
| 8 | Measure running amps - Phase L3 (check balance) | MEASURE | ☐ | |
| 9 | Inspect terminal box (connections tight, no heat discolouration) | INSPECT | ☐ | |
| 10 | Inspect cable entries and glands | INSPECT | ☐ | |
| Cooling | ||||
| 11 | Check cooling fan operation and airflow (clear obstructions) | CHECK | ☐ | |
| Mechanical | ||||
| 12 | Inspect frame and mounting bolts (tight, no cracks) | INSPECT | ☐ | |
| 13 | Check motor alignment to driven equipment (visual, check coupling wear) | CHECK | ☐ | |
| 14 | Inspect coupling condition (elastomer, grid, bolts) | INSPECT | ☐ | |
| VFD / Controls (if fitted) | ||||
| 15 | Check VFD/soft starter (fault log, cooling fan, capacitors) | CHECK | ☐ | |
| Data Recording | ||||
| 16 | Record all data for trend comparison | RECORD | ☐ | |
Lubrication Specifications (General Guide)
| System | Type / Grade | Notes |
|---|---|---|
| Bearing grease | EP2 or polyurea per manufacturer spec | Specified quantity per bearing |
Grease type and quantity vary by motor size and bearing type. Always refer to the manufacturer's service manual for your specific motor. Do not mix grease types.
Parts / Consumables Required
| # | Part / Consumable | Part Number | Qty | Ready |
|---|---|---|---|---|
| 1 | Bearing grease (EP2 or polyurea per spec) | As spec. | ☐ | |
| 2 | Vibration meter / analyser | 1 | ☐ | |
| 3 | Clamp meter (true RMS) | 1 | ☐ | |
| 4 | IR thermometer / pyrometer | 1 | ☐ | |
| 5 | Rags, compressed air | - | ☐ |
Notes / Defects Identified
Next Service Due
Technician
Supervisor / Maintenance Manager