Measuring Tilting Play - Manitowoc GROVE GMK4090 Maintenance Manual

Maintenance work on the superstructure
8.5 Slewing bearing
8.5.4
Reducing
the interval
Spare parts
and tools
Prerequisites
Type
8 - 28

Measuring tilting play

•
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).
– 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 .
– 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
(28.4 x 12.5 ft) and be level;
– 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.
The GMK4090 truck crane is equipped with a slewing bearing of the bearing
type: KDV, single-row.
Type of slewing bearing
Ball slewing bearing
Bearing type: KDV, single-row
à
Operating manual .
03056048
Model plate: Inside the inner ring.
3 302 649 en
GROVE part number
Maintenance manual
M 6
GMK4090