Manitowoc Grove GMK 4100L-1, Maintenance Manual

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Maintenance work on the superstructure
8.4 Slewing gear
8 - 16 3 302 364 en Maintenance manual
GMK 4100L-1
2
5
.1
1.
201
6
8.4.2
Checking for leaks
•
Pay attention to any unusual running noises from the slewing gears.
•
Check the slewing gears and the connections for leaks. If consumables
are leaking;
à
Checking the oil level
, p. 8 - 15.
•
Check that pipes and hoses are tightly connected and undamaged.
If any damage is found, report it to
Manitowoc Crane Care
or an authorised
GROVE dealer or your repair crew.
8.4.3
Checking the slewing gear brake
Prerequisites – The crane must be rigged with an outrigger span of at least 8.66 x 7.20 m
(28.4 x 23.6 ft) and be level;
à
Operating Instructions
.
– The truck crane must be rigged for a slewing range of 360° according to
the
lifting capacity table
.
– The RCL code for the current rigging mode must be entered;
à
Operating
Instructions
.
– The current load must not exceed 1 t (2,200 lbs) – if necessary unreeve
the hook block.
– The slewing range 360° around the truck crane must be secured.
– The main boom must be raised to 45° and fully retracted.
W
M 6
G
Risk of overturning while slewing.
Always set a rigging mode for the slewing range of 360° in accordance with
the
lifting capacity table
and enter the corresponding RCL code. Do not
override the rated capacity limiter (RCL).
G
Risk of injury due to swinging hook block
If a faulty slewing gear brake slips, the superstructure can accidentally,
suddenly turn and the hook block can suddenly swing. People standing
within the slewing range could be injured.
Secure the slewing range 360°, before you check the slewing gear brake.