Manitowoc Grove GRT8120 User Manual

Grove Published 3-22-2021, Control # 702-02 5-69
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION
5
Installing the Counterweight
Refer to Figure 5-91.
1. Position crane on a firm level surface. Fully extend and
set outriggers.
2. Make sure counterweight support (1, Figure 5-93) is
securely attached at rear of carrier.
3. Rotate superstructure 90° for clear access to rear deck.
NOTE: Counterweight weighs 13,245 kg (29,200 lb).
4. Lift counterweight from transport vehicle and position on
rear deck centering pins.
5. Place superstructure in normal travel position with boom
centered over front of vehicle. Engage turntable lock.
6. Remove lock pins and retaining pins from counterweight
lift cylinders.
7. Press and release Enable button (2). Press and hold
Left (6) and Right (7) Counterweight Cylinder Lower
buttons until cylinder rod ends engage counterweight.
8. Install lock pins and retaining pins in lift cylinders and
counterweight.
NOTE: Operate left or right cylinder as needed to install
pins.
9. Press and release Enable button (2). Press and hold
Left (8) and Right (9) Counterweight Cylinder Lift buttons
until counterweight engages superstructure and lock
cylinder holes are aligned with lock cylinder rods on both
sides.
NOTE: Operate left or right cylinder as needed to align lock
cylinder holes with lock cylinder pins.
10. Press and release Enable button (2). Press and hold
Lock Cylinder Extend button (5) until lock cylinder pins
(8, Figure 5-90) are completely extended.
11. Install pin clips in counterweight lock cylinder pins on
each side of superstructure.
12. Adjust four counterweight bolts and jam nuts to provide a
consistent stop and proper alignment with the pinning
holes.
13. Select proper counterweight operating code on the RCL.
14. Crane is now ready for operation with counterweight
installed.
CAUTION
When raising or lowering the counterweight, make sure
that the weight remains level by using the left and right
cylinder control buttons
FIGURE 5-93
10082
1
DANGER
Hand Crushing Hazard!
Do not place hand between counterweight cylinders and
the top of the counterweight while cylinders are in motion.
CAUTION
When raising the counterweight, make sure that the
weight remains level to avoid crane damage.

Manitowoc Grove GRT8120 Specifications

General

Brand	Manitowoc
Model	Grove GRT8120
Category	Construction Equipment
Language	English