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Maintenance
9.1 Inspection and maintenance
The following information is provided regarding the state of the winding insulation:
● Is the winding head insulation conductively contaminated?
● Has the winding insulation absorbed moisture?
As such, you can determine whether the machine needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
● Can the machine be put into operation?
● Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
"Testing the insulation resistance and polarization index" (Page 84)
9.1.9.4
Regreasing intervals and types of grease for operating rolling-contact bearings
Regreasing intervals
The regreasing intervals for rolling bearings in operating hours and the grease types are
stated on the machine's lubricant plate. Regardless of the actual number of operating hours
reached, regrease the motor at least once a year. The lubrication information can be found
on the lubricant plate.
Note
Observe the regreasing intervals for the rolling bearings
The regreasing intervals for rolling bearings are different from the service/inspection intervals
for the machine. Failure to regrease the rolling bearings at the specified intervals can result
in bearing damage.
Regreasing
The spent grease chamber is designed to accommodate the spent grease for a computed,
rated service life of 20000 operating hours.
● Clean the grease nipples before regreasing and then gradually press in an appropriate
type and amount of grease, as described on the lubricant plate. The shaft must rotate so
that the new grease can be distributed in the rolling bearing. The rolling bearing
temperature rises sharply at first, then drops to the normal value again after the excess
grease has been displaced out of the bearing.
– If the machine is fitted with grease collection chambers :
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Operating Instructions, 03/2018, A5E41926185A
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