Maintenance work on the superstructure
8.4 Slewing gear
8 - 18 3 302 756 en Maintenance manual
GMK6400
16.11.2018
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; Ã Checking the oil level, p. 8 - 17.
• Check that pipe lines 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 supported and levelled with the maximum outrigger
span of 8.70 x 8.50 m (28.5
x 27.9 ft); Ã Operating manual.
– No counterweight is rigged; à Operating manual.
– 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 Brake pedal function must be activated; à Operating manual.
– The main boom must be raised to 65° and fully retracted.
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.
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