Maintenance work on the superstructure
8.4 Slewing gear
03.11.2017
Maintenance manual 3 302 574 en 8 - 17
GMK3060
8.4.4 Checking the slewing gear brake
Prerequisites – The truck crane is on outriggers with an outrigger span of 6.825 x 6.2 m
(22.4x20.3ft) and is aligned horizontally;
à Operating Instructions.
– The counterweight combination 7.6 t (16 700 lbs) is rigged according to
the
lifting capacity table and equipment of the truck crane; Ã Operating
Instructions
.
– The RCL code for the current rigging mode must be entered;
à Operating
Instructions
.
– The main boom must be raised to 45° and fully retracted;
à Operating
Instructions
.
Checking When checking the slewing gear brake you must perform the slewing
movement against the slewing gear brake.
• Start the engine and switch on the slewing gear – the symbol lights up
green;
à Operating Instructions.
• Open the Hydraulic pressure and fuel consumption CCS menu group;
à Operating Instructions.
The display (1) shows the pressure in the slewing gear's hydraulic circuit.
s
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 slew
ing range could be injured.
Secure the slewing range 360°, before you check the slewing gear brake.
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