Grove Published 3-22-2021, Control # 702-02 5-21
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION
General Warnings Boom Extension Pin Interlock Mechanism
The boom extension pin interlock mechanism
(1, Figure 5-26) interlocks the front mounting pin (3) and
boom installation pins (4) to ensure that the boom extension
is erected and stowed properly. The front mounting pin (3) is
extended and retracted electrically from the ODM in the
operator cab. Push/pull cables (2) connect the front
mounting bracket pin (3) and boom nose installation pins (4).
When the front mounting pin (3) is extended, the cables (2)
retract the interlock pins (6) from the boom installation pins
(4), unlocking them. When the front mounting pin (3) is
retracted, the cables (2) insert the interlock pins (6) in the
boom installation pins (4), locking them in the extended
position. If the boom installation pins (4) are unlocked, the
front mounting pin cannot be retracted.
Front Boom Extension Mounting Pin
The front boom extension mounting pin (3, Figure 5-26) is
electrically operated from the ODM in the operator cab or
from the Remote Control Unit. When the front mounting pin
is extended, the boom nose installation pins (4) are
unlocked, allowing the installation pins to be extended or
retracted. When the mounting pin (3) is extended, the
proximity sensor in the front mounting bracket signals the
control system that the front mounting pin is properly
installed. The boom nose installation pins can only be
retracted when the mounting pin (3) is extended. When the
front mounting pin is retracted, no signal is sent to the control
system.
Boom Nose Installation Pins
The boom nose installation pins (4, Figure 5-26) are used as
a pivot to erect the boom extension on to the boom nose and
stow the boom extension on the side of the boom base
section. Mechanical interlock pins (6) lock and unlock the
installation pins (4) based on the position of the front
mounting pin (3). When the front mounting pin (3) is
retracted, the front mounting pin (3) is removed from the front
mounting bracket and the boom nose installation pins (4) are
locked in the extended position. When the front mounting pin
(3) is extended, the installation pins (4) are unlocked,
allowing the installation pins (4) to be extended or retracted.
An impact drill is required to extend and retract the boom
nose installation pins (4).
DANGER
Make sure the boom is fully retracted during erection and
stowage of the boom extension.
If the boom is extended during this process, the pins may
not engage properly and/or the boom extension could
move in an uncontrolled manner resulting in death or
serious injury.
DANGER
To prevent serious injury or death, always wear personal
protective equipment, including a hard hat, eye
protection, gloves, and metatarsal boots.
Before attempting to erect or stow the boom extension,
read and strictly adhere to all danger decals installed on
the boom/boom nose, boom extension, and stowage
brackets to prevent serious injury or death.
Controlling the boom extension during erecting and
stowing procedures is accomplished by use of a tag line
and by raising or lowering the boom. Failure to control the
boom extension could cause serious injury or death.
To Next Page
Loading...
Need help?
General
