7.2 Oil and grease stains on motors and gearboxes
Description
The area surrounding the motor, gearbox or seal lip shows signs of oil leaks. This
can be at the base, closest to the mating surface, at the furthest end of the motor
at the resolver, or around the joints of the covers (closest to the edge) on the robot
surface.
Consequences
Besides the dirty appearance, in most cases there are no serious consequences
if the leaked amount of oil is very small.
Possible causes
The symptom can be caused by:
•
Leakage of rust preventives or mounting grease. This should be wiped off.
•
Leaking sealing between gearbox and motor.
•
Gearbox overfilled with oil.
•
Gearbox oil too hot.
Recommended actions
The following actions are recommended:
Information
Action
CAUTION
Allow hot parts to cool down.
1
If the oil spill is small, this step is
sufficient.
Wipe off the oil or grease, see
2
Monitor the robot over time to see if new oil or
grease occurs.
Check the gearbox oil level.
3
Robots performing certain, ex-
tremely heavy duty work cycles
may be fitted with vented oil plugs.
These are not fitted to normal duty
robots, but can be purchased from
your local ABB representative.
Too hot gearbox oil may be caused by:
•
Incorrect oil quality or level.
•
The robot work cycle runs a specific axis
too hard. Investigate whether it is possible
to program small "cooling periods" into the
application.
•
Overpressure created inside gearbox.
4
Inspect all sealings and gaskets between motor
and gearbox. Replace broken parts.
5
Product manual - CRB 1100
685
3HAC078007-001 Revision: J
© Copyright 2021-2023 ABB. All rights reserved.
7 Troubleshooting
7.2 Oil and grease stains on motors and gearboxes
Summary of Contents for CRB 1100
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