Grove Published 4-09-2021, Control # 364-11 3-35
RT765E-2 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
1. Release the Axle Differential Lock control 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 the
differential to fully unlock.
NOTE: When the differentials are unlocked, the Axle
Differential Locked Indicator will not be illuminated.
3. Resume driving at a normal speed using good driving
judgement.
Axle Oscillation Lockouts Operation
The following procedure should be used to periodically
check the axle oscillation system and ensure that it is in
proper working condition.
1. Ensure the tires are inflated to the recommended
pressure. Refer to the Load Chart Book in the crane cab
for proper inflation pressures.
2. With the hook unloaded, the boom fully retracted and
centered over the front at no more than a 10° to 15°
boom angle, position the crane on a block or curb so that
one rear tire is approximately 6 to 12 in (15 to 30 cm)
above the level of the opposite tire.
3. Slowly swing the superstructure to the left or right until
the axle oscillation lockout valve is activated. This will
lock the rear axle out of level. Do not swing beyond the
tire track.
4. After engaging the swing brake, slowly drive off of the
block or curb and stop. The rear tires should both be
touching the road surface and the opposite front tire
should be light or slightly off the road surface.
5. Release the swing brake and swing the superstructure
until it is centered over the front.
If the axle oscillation lockout valve is functioning
properly, the crane will re-level itself; if the valve is not
working properly, the crane will not re-level itself. If the
rear axle does not lock or unlock properly, evaluate the
lockout system and repair as necessary.
General Crane Operation
Pump Drive
The main hydraulic pumps are mounted on the torque
converter drive pad. The pumps operate any time the engine
is running.
Control Lever Operation
The control lever operation for all crane functions is
standard, i.e. the closer the lever is to neutral (center), the
slower the system responds. The control lever should be
returned to neutral to hold the load. Never feather the hoist
control lever to hold the load.
NOTE: Always operate the control levers with slow, even
pressure.
Preload Check
After the crane has been readied for service, an operational
check of all crane functions (with no load applied) should be
performed. The Preload Check is as follows:
NOTE: Operate engine at or near governed speed during
preload check of crane functions.
Carefully read and become familiar with all crane
operating instructions before attempting a preload
check or operating the crane under load.
1. Extend and set outriggers.
2. Raise, lower, and swing the boom a minimum of 45°
right and left.
3. Telescope the boom in and out.
4. Raise and lower the cable a few times at various boom
lengths. Ensure there is no kinking.
Using Your Load Chart
NOTE: One of the most important tools of every crane is
the Load Chart found in the crane operator’s cab.
The Load Chart contains a large amount of information,
which must be thoroughly understood by the operator.
The Load Chart contains outrigger capacity charts for fully
extended, mid extended outriggers for the main boom and
boom extension, and fully retracted outrigger beams for main
boom only. In addition, the Load Chart contains two on-
rubber capacity charts: 360° stationary, and pick and carry
over front.
DANGER
Tipping Hazard!
Do not operate the crane if the axle oscillation lockout
system is not functioning properly.
Failure to comply with this warning may result in death or
serious injury.
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