Slew Drives
Maintenance
39
The specified values are valid for the following conditions:
Operating temperature on the slew drive < 70° C (158° F).
Circumferential speed < 0.5 m/s (1.64 ft/sec) for SP slew
drives.
Output speed < 5 rpm for WD slew drives.
Low to moderate load.
Comply with the instructions in the operating manual provided
by the manufacturer, for lubrication of optional intermediate
gear units, brakes, and motors.
If necessary re-lubricate permanent brakes. For this only use
the special grease SHELL RETINAX HDX2.
6.4 Maintenance tasks
6.4.1 Inspecting the mounting bolts
IMPORTANT
To compensate for settling, the bolts must be retightened
with the prescribed tightening torque. Retightening must
be executed without exerting additional external stress on
the bolted union.
Fig. 25: Inspecting the mounting bolts
1 Detached bolt
Execution only by a specialist.
Special tools required:
Torque wrench
Hydraulic clamping fixture
Replace loose and detached bolts or nuts and washers with
new bolts, nuts and washers.
Use the same bolt size and bolt quality.
If a hydraulic clamping fixture was used to tighten the bolts,
then a hydraulic clamping fixture must also be used to check
the bolt pretension. Always use the same tightening procedure
as specified for installation of the slew drive when checking the
bolted union.
6.4.2 Checking the tilting clearance
Wear in the raceway system results in an increase in tilting
clearance. Consequently it is necessary to check the tilting
clearance in accordance with the maintenance intervals ( section
6.3 "Maintenance schedule").
CAUTION!
CAUTION!CAUTION!
CAUTION! If the maximum permissible tilting clearance
increase is reached, then the system must be brought to a
standstill and the slew drive must be replaced
immediately, as safe operation can no longer be ensured.
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