Removable Counterweight (Optional); Removal; Installation - Manitowoc Grove RT765E-2 Service And Maintenance Manual

HOIST AND COUNTERWEIGHT
REMOVABLE COUNTERWEIGHT
(OPTIONAL)
Ensure that all mounting pins are properly installed and
locked, during, and after operating the counterweight
removal system. Failure to follow this warning could result
in death or serious injury.
Death or serious injury could result from being crushed by
a falling counterweight.

Removal

1. Position the crane on a firm level surface. Fully extend
and set the outriggers.
2. Rotate the superstructure to align the counterweight with
the support weldment on the front outrigger box.
Engaging the swing lock pin will aid alignment.
NOTE: The counterweight
(6740 kg).
NOTE: It may be necessary to jog the counterweight
removal control valve switches (Figure 5-11) to
remove the weight of the counterweight from the
counterweight pin assemblies.
3. Using the counterweight removal control valve switches
Figure 5-11 and Figure 5-12, raise the counterweight
cylinders to relieve weight on the counterweight pin
assemblies (the ones
counterweight to the superstructure).
Valve Control
7889-2
4. Remove the two counterweight pin assemblies from the
superstructure frame lugs and the counterweight. To
remove each pin assembly, push it in and turn it so its roll
pin disengages from the related catch on the
counterweight.
5-20
DANGER
weighs about 14,860 lb
holding the removable
Switches
FIGURE 5-11
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
5. Stow the counterweight pin assemblies in the bushings
on the side of the superstructure.
6. Using the counterweight removal control valve switches,
slowly lower the counterweight onto the support
weldment. Make sure the counterweight's weight fully
rests on the support weldment.
7. Remove the two cylinder pin assemblies from the
counterweight lugs and cylinder clevises. Raise the
cylinders and stow the cylinder pin assemblies in the
cylinder clevises; secure the pin assemblies with their
cotter pins.
Travel is not permitted with the removable counterweight
on the carrier deck.
8. Remove counterweight from the support weldment
before moving crane.
9. Using the crane's boom and hoist or other crane, lift
counterweight from the carrier deck to the auxiliary
transport vehicle.

Installation

1. Position the crane on a firm level surface. Fully extend
and set the outriggers.
2. Select the proper without counterweight operating code
on the RCL.
NOTE: The counterweight
(6740 kg).
3. Using the crane's boom and hoist or other crane, lift
counterweight from the auxiliary transport vehicle and
position the counterweight on the support weldment on
the front outrigger box.
4. Rotate and align the rear of the superstructure above the
removable counterweight sitting on the support weld.
Engaging the swing lock pin will aid alignment.
5. Using the counterweight removal control valve switches
located on either side of the turntable, lower the
counterweight cylinders. Pin the cylinders to the
counterweight using the two cylinder pin assemblies.
Secure the pin assemblies with their cotter pins.
6. Using the counterweight removal control valve switches,
raise the counterweight up under the superstructure
frame.
NOTE: It may be necessary to jog the counterweight
removal control valve switches to install the
counterweight pin assemblies.
WARNING
weighs about 14,860 lb