OPERATING CONTROLS AND PROCEDURES RT540E OPERATOR MANUAL
3-20 Published 01-15-2016, Control # 526-01
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 3-10) 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.
The load chart is divided into capabilities limited by crane
structural strength and stability which is shown by a bold line
across the chart. Structural strength limits are above the line
and stability limits are below the line.
The left column is the load radius, which is the distance from
the axis of the crane rotation to the load center of gravity. The
top row lists various boom lengths from fully retracted to fully
extended (with swingaway extension). The number at the
intersection of the left column and top row is the total load
limit for that load radius and boom length. The number in
parentheses below the total load limit is the required boom
angle (in degrees) for that load. The lower weight limit for the
2 boom lengths should be used.
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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