MOTORS FOR HEAVY ELECTRICAL VEHICLES
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6.1. Inspection and maintenance intervals
NOTE: The need for maintenance can vary depending on local conditions.
It is important to follow the recommendations to ensure a fully working motor.
Action Interval Chapter
Visual inspection Weekly
Detailed visual inspection
Bearings
External shaft seal
Shaft spline
External cleaning
Table 5. Inspection and maintenance intervals
6.2. Inspection and maintenance actions
6.2.1. Visual inspection
The purpose of the visual inspection is to do a quick check to see whether problems are beginning to
develop before they can cause failures and unscheduled maintenance breaks.
The visual inspection shall include the following areas:
1. Listen for any abnormal noise or increased vibrations
2. Verify that the liquid cooling system connections for inlet and outlet are free from dust or any parts
that block the flow. If required, clean the inlet and outlet areas.
Check that there are no fluid leakages. The pressure drop may not exceed 1 bar.
3. Verify that the temperature sensors in the stator winding are functioning properly
NOTE: If there is a potential safety risk, inform management and take necessary emergency
measures.
6.2.2. Detailed visual inspection
The purpose of the detailed visual inspection is to do a check to see whether problems are beginning to
develop before they can cause failures and unscheduled maintenance breaks.
The detailed visual inspection shall include the following areas:
1. The points described in 6.2.1.
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