99903514: TELESCOPIC CRANE: 1-15 SECTION 1: OPERATION
PROBLEM CAUSE RESOLUTION
Vehicle tires sink into ground. Unstable work area. Reposition truck or use blocks.
Hydraulic outrigger controls Crane does not have Engage the PTO to power the crane’s hydraulic
do not function. hydraulic power. system.
Radio remote does not work. Emergency stop Pull out emergency stop button.
button is pushed in.
Remote battery is dead. Replace with fully charged battery.
Tethered remote does not “Power” toggle switch Switch toggle to “Crane”.
work. is not switched to “Crane.”
Tether is not plugged in. Plug tether into connection in control cabinet.
Tethered control is broken. Use buttons on valve bank to manually stow crane.
Crane functions including Crane is in two-blocking Winch down to relieve the two-block condition.
boom down, extension out, condition.
and winch up do not work.
Crane is in overload condition. Boom up, extend in, or winch down to
relieve the overload condition.
Radio remote failure. Breakage, battery failure, etc. Use the radio remote backup.
1-11: TASK PERFORMANCE
To operate the crane:
1) Position the crane as close to the job as
possible on a firm, dry and level surface. Avoid
overhead obstructions on the work side of the
unit.
2) Set the auxiliary (parking) brake.
3) Depress the clutch pedal. Engage the PTO
per section 1-4-1.
4) Before conducting any boom operations,
extend outriggers and level the crane side to
side, using the power down outrigger function.
Use a signal person if the outriggers are not in
view from the operator’s station when extending
or lowering the outriggers. Provide blocks if
necessary to level the unit on sloping ground or
bearing pads if the outriggers tend to sink into
soft terrain or hot asphalt. Some concrete or
asphalt surfaces are relatively thin and cannot
withstand the outrigger loading. Concrete can
break through and cause instability.
WARNING
DO NOT ATTEMPT TO HANDLE A LOAD IF
OUTRIGGERS ARE UNABLE TO MAKE
SOLID CONTACT WITH THE GROUND.
ALL OUTRIGGERS MUST BE DE-
PLOYED!
5) Raise the inner boom.
6) Rotate the boom to the selected location.
Lower the hook block to an adequate length to
allow for extended boom length before extending
any telescoping boom sections.
Firmly set the outriggers, but do not lift tires
from the ground. Stability over the front (without
front stabilizers) can be hampered by raising the
vehicle excessively. Be very careful when
operating in areas around the truck not sup-
ported by outriggers because of cushion of tires
and springs. When swinging loads from areas
supported by outriggers, use extreme caution
due to potential sudden shifting of the support
point. Always keep the load as close to the
ground as possible.
Figure A-19: Troubleshooting Crane Operation Problems
1-11-1: TROUBLESHOOTING
20030115
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