Slew Drives
Maintenance
38
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Interval Maintenance task To be executed by
weekly Check seal Specialist
Tighten bolts Specialist
after 100 operating
hours
Check tilting clearance Specialist
Tighten bolts
Reduce the inspection interval if there is heavy wear
or continuous operation.
Specialist
Check tilting clearance
Reduce the inspection interval to 200 operating
hours if the detected increase in tilting clearance is
approximately 75% of the permissible tilting
clearance increase.
After further increase reduce the interval between
inspections to 50 - 100 hours.
Specialist
after every additional
700 operating hours
or at least every 6
months
Check circumferential backlash
Reduce the inspection interval to 200 operating
hours if the detected increase in circumferential
backlash is approximately 75% of the permissible
circumferential backlash increase.
After further increase reduce the interval between
inspections to 50 - 100 hours.
Specialist
Tab. 16
Lubrication General re-lubrication of slew drives:
After each cleaning
Before and after longer periods of standstill, e.g. for cranes and
construction machines during the winter months.
IMPORTANT
The main cause for slewing ring failure is inadequate
lubrication. The lubrication intervals essentially depend on
existing working and environmental conditions, as well as
the version of the slew drive. Precise lubrication intervals
can only be determined by tests under normal operating
conditions.
If comparable results are not available, the following table can be
used as a guide value:
Tab. 17
Work conditions Lubricating interval To be executed by
Dry and clean workshop hall (rotary
tables, robots, etc.)
Approx. every 300 operating hours, at
least every 6 months
Specialist
Severe conditions on open terrain
(cranes, excavators, etc.)
Approx. every 100 to 200 operating
hours, at least every 4 months
Specialist
Aggressive climatic conditions, (ocean,
desert, arctic climate, extremely
polluted environment, ≥70 operating
hours per week
Every 50 operating hours, at least every
2 months
Specialist
Extreme conditions (tunnel boring
machines, steel works, wind turbines)
Continuous lubrication (through central
lubrication or grease cups)
Specialist
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