Manitowoc GROVE GMK4090 - Checking for Leaks; Checking the Slewing Gear Brake

Maintenance work on the superstructure
8.4 Slewing gear
8 - 16 3 302 649 en Maintenance manual
GMK4090
07.12.2017
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. In the event of
leaking consumables;
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 truck crane is rigged with a maximum outrigger span of 8.66 x 7.20 m
(28.4x23.6ft) and is level;
à Operating manual.
– 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
manual
.
– 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, 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.