Which of the following describes the key steps in performing a preventive maintenance inspection on a traction motor?

• A. Visual inspection, check fluid levels/filters, measure temperature and vibration, check electrical connections, verify insulation resistance, confirm mounting and alignment.
• B. Visual inspection only.
• C. Check fluid levels/filters only.
• D. Measure temperature only.

Answer: (A)

A thorough preventive maintenance inspection for a traction motor requires checking mechanical, electrical, and thermal health. Start with a visual inspection to spot obvious damage, leaks, wear, or mounting issues. Then assess fluid levels and filters to ensure lubrication and cooling systems are functioning properly. Measuring temperature and vibration during operation helps detect overheating, bearing wear, or misalignment and abnormal dynamic behavior. Inspect electrical connections for tightness, corrosion, and damaged wiring. Verify insulation resistance to monitor the health of insulation and catch degradation before it leads to failure. Finally, confirm mounting and alignment so the motor is securely attached and properly aligned with the drive train, preventing undue stresses and accelerated wear. This combination covers all the essential areas, whereas single-aspect checks miss important failure modes.