Checking For Leaks; Checking The Slewing Gear Brake - Manitowoc Grove GMK 5250L 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 are
à
Checking the oil level , p. 8 - 15.
leaking;
•
Check that pipes and hoses are tightly connected and not damaged.
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 8.95 x 7.80 m
(29.4 x 25.6 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;
manual .
– The current load must not exceed 1 t (2,200 lbs) – where 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 over-
ride the rated capacity limiter (RCL).
Risk of injury due to swinging hook block.
If a faulty slewing gear brake slips, the superstructure can accidentally, sud-
denly 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 manual .
3 302 744 en
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or an authorised
M 6
à
Operating
Maintenance manual
GMK5250L