Fixed Counterweight; Description; Maintenance; Counterweight Plate - Manitowoc Grove RT765E-2 Service And Maintenance Manual

HOIST AND COUNTERWEIGHT

FIXED COUNTERWEIGHT

Description

The counterweight Figure 5-10 is pinned to the rear of the
superstructure and weighs about 14,400 lb (6540 kg). For
cranes without an auxiliary hoist, an additional 1478 lb (672
kg) counterweight is bolted to the hoist mounting area
instead of the auxiliary hoist.

Maintenance

Ensure the counterweight pin assemblies are installed
properly and are secure in their catches.
Death or serious injury could result from being crushed by
a falling counterweight.
Removal
1. Fully extend and set the outriggers.
2. Rotate the superstructure so the counterweight is over
the front of the carrier to gain additional clearance.
CAUTION
When lifting/handling the counterweight, keep the chains/
straps vertical to minimize side pull on the lifting lugs and
causing damage.
NOTE: The counterweight weighs approximately 14,400 lb
(6540 kg).
NOTE: Use of a forklift to install or remove the
counterweight is not recommended. Damage or
misalignment of the counterweight can result if a
forklift is used for installation or removal.
3. Attach an adequate lifting device to the counterweight.
4. Adjust the four counterweight leveling bolts to provide
maximum clearance of the counterweight from the
superstructure.
5. Take up any slack on the lifting chains and raise the
counterweight just enough to remove any pressure on
the left and right counterweight pin assemblies.
6. Remove the two counterweight pin assemblies from the
superstructure frame lugs and the counterweight. To
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DANGER
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
remove each pin assembly, push it in and turn it so its roll
pin disengages from the related catch on the
counterweight.
7. Lower the counterweight
superstructure and remove the counterweight from the
crane.
Installation
1. Fully extend and set the outriggers.
2. Rotate the superstructure so the counterweight will be
over the front of the carrier to gain additional clearance.
CAUTION
When lifting/handling the counterweight, keep the chains/
straps vertical to minimize side pull on the lifting lugs and
causing damage.
NOTE: The counterweight weighs approximately 14,400 lb
(6540 kg).
NOTE: Use of a forklift to install or remove the
counterweight is not recommended. Damage or
misalignment of the counterweight can result if a
fork lift is used for installation or removal.
3. Attach an adequate lifting device to the counterweight
and lift the counterweight
superstructure, aligning the mounting holes on the
counterweight to the holes in the superstructure.
4. Secure the counterweight to the superstructure with the
two counterweight pin assemblies. To secure each pin
assembly, push it in and turn it so its roll pin engages the
related catch on the counterweight. Then release the pin
assembly so its spring can hold the pin assembly in
place.
5. Remove the lifting device from the counterweight.
6. Using the four counterweight leveling bolts, level the
counterweight and eliminate any relative movement
between the counterweight and turntable. Maximum
height of counterweight shall not exceed 0.24 in (6 mm)
out of level with the turntable bearing when measured
from either counterweight outer edge.

Counterweight Plate

The fixed counterweight has a removable counterweight
plate Figure 5-10 attached to its rear wall. This plate weighs
870 lb (395 kg).
enough to clear the
into place on the