Checking For Leaks; Checking The Slewing Gear Brake - Manitowoc Grove GMK 4100L-1 Maintenance Manual

Maintenance work on the superstructure
8.4 Slewing gear
8.4.2
8.4.3
Prerequisites
G
G
8 - 16

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
à
Checking the oil level , p. 8 - 15.
are leaking;
•
Check that pipes and hoses are tightly connected and undamaged.
If any damage is found, report it to
GROVE dealer or your repair crew.

Checking the slewing gear brake

– 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;
– 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;
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.
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).
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.
Manitowoc Crane Care
à
Operating Instructions .
3 302 364 en
W
or an authorised
M 6
à
Operating
Maintenance manual
GMK 4100L-1