Grove Published 3-22-2021, Control # 702-02 3-43
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES
External RCL Light Tower (Optional)
The optional External Rated Capacity Limiter (RCL) Light
Tower (1, Figure 3-23) is located on the outside upper right
corner of the crane cab.
The External RCL Light Tower is an operational aid.
The external light tower works with the RCL system to warn
the operator and external personnel of an approaching
overload condition that could cause equipment damage,
personal injury, or death.
The lights in the light tower come on in the following manner:
• Green LED – when the green LED is on, the load being
lifted is less than 90% of crane RCL programmed
capacity.
• Yellow LED – when the yellow LED is on, the load being
lifted is between 90% to 100% of crane RCL
programmed capacity.
• Red LED – when the red LED is on, the load being lifted
is greater than 100% of crane RCL programed capacity.
Strobe Light or Beacon
The standard Strobe Light or Beacon (1, Figure 3-24) is
located at the right side of the superstructure.
The Beacon is on when the Ignition Switch is in the RUN (I)
position.
Two Beacons are available as an option.
Backup Alarm
The Backup Alarm is an audio system used to warn
personnel in the area that the crane is backing up.
The Backup Alarm is activated when the transmission is
placed in reverse.
The Backup Alarm is installed on the rear of the carrier.
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