Manitowoc Grove GRT8120 User Manual

Grove Published 3-22-2021, Control # 702-02 3-41
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES
3
Lock Cylinder Retract Button
The Lock Cylinder Retract Button (3, Figure 3-21) must be
pushed and held to retract the lock cylinder holding the
counterweight. The operator must release the button when
lock cylinder is at desired position.
Function Enable Button
The Function Enable Button (4, Figure 3-21) is used to
enable the other function buttons on the keypad. Thus, to
operate the counterweight removal system, the enable
button must first be pushed and released to activate all
function buttons.
If a function button is not pushed within 5 seconds of pushing
the Enable button, a system time-out will occur.
If the red LED comes on indicating a system time-out, the
operator must again quickly push and release the Enable
button, to re-activate the function buttons.
If the Enable button is pushed and held for more than
2 seconds without releasing, then the red LED will come on
and no functions can be operated. The operator must first
release the Enable button, and then quickly push and
release it again to re-activate the function buttons.
Main Power LED Indicator
The Main Power LED Indicator (5, Figure 3-21) flashes
green to indicate that Main Power is on.
Horn Button
The Horn Button (6, Figure 3-21) is always active and can be
pushed at any time without first pushing the Keypad Enable
button (4).
Lock Cylinder Extend Button
The Lock Cylinder Extend Button (7, Figure 3-21) must be
pushed and held to extend the cylinder holding the
counterweight. The operator must release the button when
lock cylinder is at desired position.
Left Counterweight Cylinder Lower Button
The Left Counterweight Cylinder Lower Button
(8, Figure 3-21) must be pushed and held to lower the left
cylinder holding the left side of the counterweight. The
operator must release the button when left side of the
cylinder is at desired position.
Right Counterweight Cylinder Lower Button
The Right Counterweight Cylinder Lower Button
(9, Figure 3-21) must be pushed and held to lower the right
cylinder holding the right side of the counterweight. The
operator must release the button when right side of the
cylinder is at desired position.

Manitowoc Grove GRT8120 Specifications

General

Brand	Manitowoc
Model	Grove GRT8120
Category	Construction Equipment
Language	English