OPERATING CONTROLS GRT655/655L OPERATOR MANUAL
3-14 Published 3-23-2020, Control # 654-04
Seat Slide Lever
Pushing the Seat Slide Lever (14, Figure 3-8) to the left and
holding allows the seat to be moved forward or backward
relative to the armrests. Release the lever when the seat is in
the desired position.
Air Conditioner/Heater Climate Unit
The crane cab Air Conditioner/Heater Climate Unit (15,
Figure 3-8) is located in the cab under the operator’s seat.
The vents (16) are part of the climate unit and can be
adjusted to direct the flow of air.
Seat Frame Slide Lever
Pushing the Seat Frame Slide Lever (17, Figure 3-8) to the
left and holding allows the seat and armrests to be moved
forward or backward. Release the lever when the seat and
armrest are in the desired position.
Armrest Adjustment Buttons
Left and right armrest and armrest controls can be adjusted
using the adjustment buttons (18, Figure 3-8) found under
the rear of the armrest. Press the button to allow the entire
armrest to rotate; release button at the desired position.
Seat Height Adjustment Lever
To adjust seat height relative to the armrests, lift height
adjustment lever (19, Figure 3-8) and adjust seat as needed.
The fore-to-aft incline of the seat can also be adjusted using
the adjustment lever.
Front Limit Bypass Switch (Non-CE Certified
Cranes)
The Rated Capacity Limiter (RCL) system, when
programmed accurately, will lock out the following crane
functions—boom up/down, telescope extend, and hoist up—
when a lift is attempted at or above the crane's capacity. or
when a two-block condition exists. Locking out these
functions prevents the overload or two-block condition from
worsening. These same crane functions are locked out
initially when starting the crane and before the RCL system
has been programmed.
The Front Limit Bypass Switch (20, Figure 3-8) is a
three-position, momentary type key switch located on the
lower right console. During certain rigging work or to recover
the crane, turn the switch clockwise or counterclockwise and
hold to bypass the following limiter systems on the crane.
Turning the key switch clockwise and hold
ing bypasses the
following limiter systems and their crane function lock outs:
• Anti Two-Block System (boom up/down, telescope
extend, hoist up)
• Third Wrap Limiter System (hoist down)
The following indicators come on to indicate the limiters are
bypassed:
• Anti Two-Block Indicator is flashing (7, Figure 3-5)
• Third Wrap Indicator is flashing (29, Figure 4-18 and
Figure 4-19)
Turning the key switch counterclockwise and hold
ing
bypasses the following limiter systems and their crane
function lock outs:
• RCL System (boom up/down, telescope extend, hoist
up)
• Anti Two Block System (boom up/down, telescope
extend, hoist up)
• Third Wrap Limiter System (hoist down)
• Working Range Limiter (WRL) System
• Carrier Avoidance System
• -29°C Temperature Limiter System (optional)
The following indicators come on to indicate the limiters are
bypassed:
• Bypass 1 Pressed Indicator is on (3, Figure 4-90)
• RCL Bypass Active Indicator is on (2, Figure 4-90)
• RCL Bypass Status Indicator is on (1, Figure 4-90)
• RCL Shutdown Warning Indicator is flashing
(5, Figure 3-5)
• Anti Two-Block indicator is flashing (7, Figure 3-5)
• Third Wrap indicator is flashing (29, Figure 4-18 and
Figure 4-19)
• Working Range Limiter (WRL) indicator is flashing
(35, Figure 4-18 and Figure 4-19)
• Low Boom Angle Indicator is flashing (27, Figure 4-18
and Figure 4-19)
• -29°C Temperature Limiter Indicator is flashing
(21, Figure 4-18 and Figure 4-19)
WARNING
Overload Hazard!
The Limit Bypass Switch is used to override the RCL
system during some rigging activities.
When the Limit Bypass Switch is activated, the operator
must make sure that the crane is not overloaded.
Do not operate the crane with the RCL overridden during
normal operations.
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