Manitowoc Grove GMK4100L-1 Operating Manual page 832

Rigging work
12.9 Rigging/unrigging the counterweight
Extending/
retracting the
lifting cylinders
S
H
12 - 86
This section describes how to operate the lifting cylinders manually,
– for correcting the displayed rigging mode and
– for pre-charging the counterweight afterwards.
Risk of damage to the counterweight
With the override switch actuated, the functions are always enabled.
Slew the superstructure only when the lifting cylinders are fully retracted.
Always lift and lower the counterweight in automatic mode, otherwise
slewing with extended lifting cylinders will be blocked;
mode rigging , p. 12 - 88,
The Counterweight menu opens.
Errors and warning messages can be shown
for operation.
1 Slewing blocked – pre-clamp the counter-
à
weight;
2 Slewing and counterweight hoist unit
blocked. Lock the rear counterweight
platform;
3 Contact
Manitowoc Crane Care
4 If the pre-tensioning pressure continues to
drop, the message (1).
à
Automatic mode unrigging , p. 12 - 90.
3 302 690 en
p. 12 - 88.
à
p. 12 - 95.
.
à
Automatic
Operating manual
GMK4100L-1