Manitowoc Grove GMK6300L-1

Maintenance work on the superstructure
8.7 Slewing gear
13.02.2018
Maintenance manual 3 302 719 en 8 - 49
GMK6300L-1
Checking When checking the slewing gear brake you must perform the slewing
movement against the slewing gear brake.
• Switch off the engine.
• Remove the coil (1) from the valve Y 2304.
The slewing gear brake will now not be
released when the slewing gear is switched
on.
• Start the engine and switch on the slewing gear.
• Open the Settings submenu.
Display (1) will show the pressure in the slewing gear's hydraul
ic circuit.
• Move the control lever slowly to the stop and wait until the pressure in the
hydraulic circuit has risen to approx. 200 bar (approx. 2 900 psi).
– If the superstructure still does not slew, the braking force of the
slewing gear brake is adequate.
– If the superstructure does slew, the slewing gear brake is defective
and must be repaired immediately by
Manitowoc Crane Care or
an authorised GROVE dealer.
• Switch the slewing gear off and switch the engine off.
• Fasten the coil (1) to the valve Y 2304 using
the nut.
• Start the engine and check the slewing gear
for correct operation.