Maintenance work on the superstructure
8.8 Slewing bearing
13.02.2018
Maintenance manual 3 302 719 en 8 - 53
GMK6300L-1
8.8 Slewing bearing
8.8.1 Checking the screws
• Comply also with the à Running-in regulations, p. 4 - 1.
Check the serial
number
• Check the serial number of your truck crane.
The following description applies only to truck cranes GMK6300L-1 with
serial numbers from 6300 5010.
For truck cranes GMK6300L-1 with serial numbers from 6300 5001 to 6300
5009 please refer to the applicable additional sheet 3 302 522 for these
truck cranes. More far-reaching disassembly is necessary in order to
achieve free access.
• For information please contact Manitowoc Crane Care.
Tools – Torque wrench.
– Auxiliary tools for the torque wrench;
à p. 8 - 55.
Prerequisites – The crane must be rigged with an outrigger span of at least 8.70 x
8.50 m
(28.5x27.9ft) and be level;
à Manual de instrucciones.
– The counterweight combination 35.5 t (78,200 lbs) must be rigged
according to the
lifting capacity table and equipment on the truck crane.
– In addition, the tyres on the 4th and 5th axle lines should be removed so
that
freedom of movement under the slewing bearing is improved.
– The main boom must be fully retracted and raised to 75°;
à Manual de
instrucciones
.
– The current load must not exceed 1 t (2,200 lbs) – if ne
cessary unreeve
the hook block.
– The slewing range 360° around the truck crane must be secured.
– The engine must be switched off and secured against unauthorised use;
à p. 2 - 3.
s
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