Grove Published 3-23-2020, Control # 654-04 3-15
GRT655/655L OPERATOR MANUAL OPERATING CONTROLS
All crane function lock outs are bypassed while the Limit
Bypass switch is held in the actuated position.
Limit Bypass Set-Up Switch (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 craning functions are locked out
initially when starting the crane and before the RCL system
has been programmed.
The Limit Bypass Set-up Switch (20, Figure 3-8) is a
three-position, momentary type key switch located on the
lower right console. During certain rigging work or a to
recover the crane, turn the switch clockwise or
counterclockwise to bypass the following limiter systems on
the crane.
Turning the key switch clockwise and releas
ing bypasses the
following limiter systems and their crane function lock outs:
• Anti Two-Block System (boom up/down, telescope out,
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)
When the switch is turned clockwise and released, all crane
functions—boom up/down, telescope out/in, hoist up/down,
and swing left/right—will operate at 50% of their normal
speeds when actuated.
Turning the key switch counterclockwise and releas
ing
bypasses the following limiter systems and their crane
function lock outs:
• RCL System (boom up/down, telescope out, hoist up)
• Working Range Limiter (WRL) system
• Carrier Avoidance System
If the RCL is programmed and active and the limit bypass
switch is turned counterclockwise and released, the swing
left/right function pressure is reduced to 25% and the boom
up/down, hoist up/down, and telescope extend/retract
function speeds are reduced to 15% when actuated. If the
load exceeds 110% of the crane’s capacity, all craning
functions will lock out. The following indicators come on to
indicate the limiters are bypassed:
• Bypass 1 Pressed Indicator is on (only when in the
counterclockwise position) (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)
• Working Range Limiter (WRL) indicator is on
(35, Figure 4-18 and Figure 4-19)
• Low Boom Angle Indicator is flashing (27, Figure 4-18
and Figure 4-19)
If the RCL has not been programmed and the limit bypass
switch is turned counterclockwise and released, the swing
left/right, boom up/down, hoist up/down, and telescope
extend/retract functions operate at normal speeds when
actuated. The following indicators come on to indicate the
limiters are bypassed:
• Bypass 1 Pressed Indicator is on (only when in the
counterclockwise position) (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 on and flashing
(5, Figure 3-5)
• Working Range Limiter (WRL) indicator is on
(35, Figure 4-18 and Figure 4-19)
• Low Boom Angle Indicator is flashing (27, Figure 4-18
and Figure 4-19)
All craning functions locked out are bypassed until one of the
following occurs:
• Limit Bypass Switch is again turned to the
counterclockwise position and released while the
controllers are in the neutral position
• Controllers are in the neutral position for 10 seconds
WARNING
Overload Hazard!
The Limit Bypass Switch prevents the function lock outs
from activating.
When the Lift 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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