InsPECTIon And MAInTEnAnCE
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6.2. 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
6.3.1
Detailed visual inspection
1500 h in operation or every 6 months*
6.3.2
Bearings
3000 h in operation or every 12 months*
6.3.3
External shaft seal
3000 h in operation or every 12 months*
6.3.4
Shaft spline
3000 h in operation or every 12 months*
6.3.5
External cleaning
3000 h in operation or every 12 months*
6.3.6
*Whichever comes first.
Table 6.
Inspection and maintenance table.
6.3. Inspections and maintenance
6.3.1. Visual inspections
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 the rating on the separate rating plate, see Figure 3.
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.
6.3.2. Detailed visual inspections
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 6.3.1.
2.
Look for any visual damage to the structure of the motor such as cracks in the structure and
corrosion in screw joints, etc. If external damage to the motor is observed and to such an extent that
it prevents operation or represents a safety risk, replace the motor as soon as possible.
3.
Check that all bolts have the correct tightening torque, see recommended values in Table 4.
