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Service and maintenance
8.2 Checking the gearbox for leaks
Measure
Clean the geared motor.
Check that fastening screws on
gearboxes and add-on elements
are securely tightened. Check
that covers and plugs are se-
curely fastened.
Check the torque arm's plastic
bushing.
8.2
Checking the gearbox for leaks
Oil or grease escaping in small quantities from the shaft sealing ring should be regarded as
normal during the running-in phase of 24 hours operating time.
If the quantities escaping are significant or leaking continues after the running-in phase, the
shaft sealing ring must be replaced to prevent consequential damage.
Shaft sealing rings are subject to natural wear. The service life depends on the operating
conditions. We recommend that shaft sealing rings are included in periodic maintenance and
servicing work on the system.
Table 8- 2
Status
Film of moisture
on the shaft seal-
ing ring
Leakage at the
shaft sealing ring
36
Time interval
Depending on degree of soiling,
at least every 6 months.
After 3 hours, and then every 2
years.
Every 6 months.
Description and measures
Description
Film of moisture as a
result of the inherent
principle of operation
(apparent leakage)
Identifiable small trickle,
formation of drops, also
after the running-in
phase
Description of the work
Cleaning the gearbox or geared
motor (Page 37)
Checking tightness of fastening
bolts (Page 37)
Torque arms with shaft-mounted
gearboxes (Page 26)
Measures
Remove using a clean
cloth and continue to
observe.
Replace the sealing
ring, determine the
possible cause of the
sealing ring failure and
rectify.
Operating Instructions, 02/2018, A5E38093971A/RS-AB
Notes
This does not represent a
fault; frequently, in the
course of operation, the
sealing ring dries off.
During the running-in phase,
the shaft sealing ring beds
into the shaft. A visible track
can be seen on the shaft.
Optimum preconditions for a
perfect seal are obtained
after the running-in phase.
BA 2012
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