Manitowoc Grove GRT8120, Руководство оператора

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Grove
Published 3-22-2021, Control # 702-02
4-19
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES
4
Engage differential locks by doing the following:
NOTE: The crane control system only allows the
differential lock to be engaged for a maximum of 60
seconds at a time, regardless of whether the
Differential Lock Switch is pushed and held for a
longer time period.
1. Press and hold the Differential Lock Switch (located on
the left armrest) in the locked position with crane
stationary or moving at a slow speed.
If moving at a slow speed, let up momentarily on the
Foot Throttle Pedal to relieve torque on the differential
gearing. This will fully engage differential locks.
NOTE: When differentials are locked, the Axle Differential
Locked Indicator in the Alerts Area (1 Figure 4-67)
of the Operator Display Module (ODM) is on.
2. Proceed over poor road condition cautiously.
When adverse condition has passed, disengage differential
locks by doing the following:
1. Release the Differential Lock Switch, allowing it to return
to the unlocked position while maintaining a slow speed.
2. Let up momentarily on the Foot Throttle Pedal to relieve
torque on the differential gearing, allowing differential to
fully unlock.
NOTE: When differentials are unlocked, Axle Differential
Locked Indicator will go off.
3. Resume driving at a normal speed using good driving
judgment.
CRANING FUNCTIONS
Controller Operation
The controller operation for crane functions is proportional –
that is, the closer the lever is to neutral (center), the slower
the system responds.
NOTE: Always operate controllers with slow, even
pressure.
Proper Crane Leveling
If a crane is not level within 1% of grade, allowable capacities
must be reduced. Therefore, whether lifting on rubber or
outriggers, it is essential the crane is level to within 1% of
grade. The digital Inclination indicator provided in the
Operator Display Module (ODM) is calibrated to be accurate
within 0.1% of grade.
To properly level the crane, the boom must be positioned
over front of the crane, fully lowered to horizontal and fully
retracted, and the cab must be in its fully lowered position.
Raise and level crane following instructions for
Using the
Outriggers , page 4-19.
A working crane may settle during lifting operations.
Frequently check the crane for level. When rechecking the
crane for level, the boom must be positioned over the front of
the crane, fully lowered to horizontal and fully retracted, and
the cab must be in its fully lowered position. If necessary,
level the crane again following instructions in the section
Using the Outriggers , page 4-19.
Using the Outriggers
Outriggers are extended and retracted from the Operator
Display Module (ODM) in the cab [refer to
Using the
Operator Display Module (ODM) , page 4-68].
Setting the Outriggers Manually
NOTE: ECO mode does not work when operating the
outriggers.
1. Enable the outrigger functions by doing the following:
- Shift transmission to neutral
- Engage the parking brake
- Engage four-wheel drive
DANGER
To prevent serious injury or death, keep clear of moving
outrigger beams/jacks.
DANGER
Death or serious injury could result from improper crane
setup on outriggers.
WARNING
Be sure the outriggers are properly extended and set, and
the crane is level for operation on outriggers.
All four outrigger beams must be equally set to the fully
retracted, mid-extend, or fully extended position before
beginning operation.
WARNING
When operating the crane on outriggers, the outriggers
should always be extended and set in the proper position
corresponding to the load capacity chart to be used.