OPERATING CONTROLS AND PROCEDURES RT530E-2 OPERATOR’S MANUAL
3-18 Published 5-3-2016, Control # 555-02
NOTE: When the differentials are locked, the Axle
Differential Locked Indicator illuminates.
2. Proceed over the poor road condition cautiously.
When the adverse condition has passed, disengage the
differential locks by doing the following:
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
judgment.
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 #1 hydraulic pump is driven by a transmission
PTO. The #2 hydraulic pump is mounted to the rear of pump
#1 and is direct engine driven.
Control Lever Operation
The control lever operation for crane functions is
proportional, i.e., the closer the lever is to neutral (center),
the slower the system responds. Return the control lever to
neutral to hold the load. Do not feather the hoist control 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. Preload check is as follows:
• Extend and set the outriggers and level the crane.
• Raise, lower, and swing the boom right and left at least
45 degrees.
• Telescope the boom out and back in, ensuring all
sections extend and retract properly.
• Raise and lower the cable a few times at various boom
lengths. Make sure there are no kinks and that the cable
is spooling on the hoist properly.
NOTE: Carefully read and become familiar with all crane
operating instructions before operating the crane.
Using Your Load Chart
NOTE: One of the most important tools of every Grove
crane is the load chart found in the crane operator's
cab.
NOTE: Refer to (Figure 3-9) for terms to know in
determining lifting capacities.
The load chart contains the lifting capacities of the crane in
all allowable lifting configurations, and must be thoroughly
understood by the operator.
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.
CAUTION
Run the engine at or near the governed RPM during
operation of all crane functions.
Reference Only
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