46 l
Installation, operation and maintenance manual – Squirrel cage motor – WGM20 Line 14108242
9
MAINTENANCE PLAN
The maintenance plan described in Table 9.1 is only referential, and the intervals between each maintenance intervention
may vary according to the motor location and operating conditions.
For the associated equipment, such as the water supply unit or control and protection system, it is necessary to refer to their
specific manuals.
Table 9.1: Maintenance plan
MOTOR PART
Weekly
Monthly
3
months
6
months
Annual
3
years
STATOR
Visual inspection of the stator.
x
Cleaning of the stator.
x
Inspection of the slot wedges.
x
Verification of the fastening of stator
terminals.
x
Measurement of the winding insulation
resistance.
x
ROTOR
Visual inspection.
x
Cleaning of the rotor.
x
Inspection of the shaft (wear, incrustations).
x
BEARINGS
Control of noise, vibration, leaks and
temperature.
x
Lubricant quality control.
x
Lubricant change.
According to the period
indicated on the bearing
nameplate.
COOLING SYSTEM
Verification of the temperature, flow and
pressure of the cooling water.
x
Inspection of the cooling water quality.
x
Check the water inlet and outlet connections
with the cooling circuit.
x
Check for tightness, leaks.
Cleaning of the frame internal channels and
cooling heads.
If there is evidence of change
in the water flow or loss of
load.
PROTECTION AND CONTROL EQUIPMENT
Recording of the values.
x
Inspection of the operation.
x
Disassembly and operation test.
x
COUPLING
Inspection of the alignment.
x
Check after the first week of
operation.
Inspection of the coupling fastening.
x
Check after the first week of
operation.
WHOLE MOTOR
Inspection of the cleanliness, noise, vibration
and temperature.
x
Drainage of condensed water.
x
Retightening of the screws.
x
Cleaning of the terminal boxes.
x
Retightening of electrical and grounding
connections.
x
