OPERATING CONTROLS AND PROCEDURES GRT880 OPERATOR MANUAL
3-16 Published 3-25-2020, Control # 643-04
• Carrier Avoidance System
• -29°C Temperature Limiter System (optional)
The following indicators illuminate to indicate the limiters are
bypassed:
• Bypass 3 Pressed Indicator is on (only when switch is
pressed and held)
• Bypass 3 Active Indicator is on
• Working Range Limiter (WRL) Indicator is flashing
• Carrier Avoidance Indicator is flashing
• -29°C Temperature Limiter Indicator is flashing
Upon pressing the Limit Bypass Switch, the swing left/right
function speed is reduced to 25% and the boom down, hoist
up, and telescope extend function speeds are reduced to
15% of rated function speed when actuated.
Overriding the RCL with this switch should only be done in
an emergency.
All craning functions locked out are bypassed until one of the
following occurs:
• Limit Bypass Switch is again pressed and released.
• 30 minutes has passed since the Limit Bypass Switch
was initially pressed and the joysticks are in the neutral
position.
• Engine is turned off.
RCL Internal Light Bar (Optional)
The Rated Capacity Limiter (RCL) Internal Light Bar is
located on the upper left hand corner of the crane cab. The
RCL is an operational aid that warns a crane operator of
approaching overload conditions and other conditions that
could cause damage to equipment and personnel.
Strobe Light or Beacon (Optional)
The Strobe Light or Beacon is on the left side of the
superstructure. It is on when the Ignition Switch is on.
Backup Alarm (Not Shown)
The Backup Alarm Audio System is installed on the right side
of the rear outrigger box. The Backup Alarm is used to warn
personnel when the crane is backing up.The alarm is
connected to electrical wiring for the transmission reverse
solenoids. It is activated when the transmission is in the
reverse position.
Emergency Exit
The windshield is the Emergency Exit. In an emergency,
push out windshield and escape through opening.
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