Maintenance work on the superstructure
8.5 Slewing bearing
8 - 28 3 302 649 en Maintenance manual
GMK4090
07.12.2017
8.5.4 Measuring tilting play
Reducing
the interval
• When after several years of intensive crane operation, half of the value for
the maximum permissible tilting play is reached, then you must reduce
the maintenance interval.
• Measure the tilting play from then on every three months (M 3).
Spare parts
and tools
– Dial gauge (precision 0.01 mm (0.00039 in)) with tripod.
– Measurement report from when the truck crane was put into operation;
à Delivery receipt.
Prerequisites – The slewing bearing has been previously checked for tightness;
à Checking the screws, p. 8 - 21.
– The crane must be rigged with an outrigger span of at least 8.66 x 3.80 m
(28.4x12.5ft) and be level;
à Operating manual.
– The auxiliary hoist or alternatively the compensation weight
0.5 t (1,100 lbs) is rigged.
– The counterweight combination of 4.5 t (9,920 lbs) must be maximally
rigged according to the
Lifting capacity table and equipment on the truck
crane.
– The lattice extension must have been removed.
– The main boom is telescoped to 0-0-0-0-50.
– The load being lifted must not exceed 0.5 t (1,100 lbs) – where necessary
unreeve the hook block.
Type The GMK4090 truck crane is equipped with a slewing bearing of the bearing
type: KDV, single-row.
Type of slewing bearing GROVE part number
Ball slewing bearing
Bearing type: KDV, single-row
03056048
Model plate: Inside the inner ring.
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