TM 5-3810-307-24-1-1
OUTRIGGER BOX ASSEMBLY
DESCRIPTION
The outrigger box assembly consists of an outrigger
2.5-inch (6.35 cm) extension cylinder, and the
beam, a 3.5-inch (10.4 cm) stabilizer cylinder, a
required hoses and mounting hardware.
THEORY OF OPERATION
When the outrigger extension is activated, it extends
the outrigger beam vertically. This sequence of
or retracts the outrigger beam within the outrigger
events provides for lifting and stabilizing the crane for
box. The jack cylinder is mounted to the end of the
operation.
beam. The jack cylinder applies force to
MAINTENANCE
REMOVAL.
1.
Extend the outrigger slightly to facilitate
WARNING
attaching a lifting device to the outrigger beam.
Ensure any blocking material used is
2.
From the opposite side of the outrigger
capable of supporting the weight of the
housing, remove the end cover.
outrigger beam. Do not allow it to tilt or
slide. Failure to do so may result in
3.
Tag and disconnect the hydraulic lines at the
death or injury to personnel.
cylinder end of the extension cylinder. Cap all lines
and fittings.
NOTE
NOTE
The
outrigger
beam
weighs
approximately 600 lbs (272 kg).
Do not allow the end of the outrigger
extension cylinder to fall when the
7.
Position the outrigger beam on the blocking
cylinder mounting shaft is removed. Use
material.
an adequate soft support to cushion any
distance the rod will drop.
INSPECTION.
4.
Remove the cotter pin securing the cylinder
mounting shaft. Remove the shaft and lay the
Inspect the outrigger beams for bends, evidence of
cylinder on the cutout in the outrigger beam.
cracks, or other damage. Check the outrigger beam
internally for hydraulic fluid, which may indicate a
5.
Attach a suitable lifting device to the outrigger
leaking cylinder, loose connection, or damaged
beam.
hydraulic line.
6.
Pull the outrigger beam out of the outrigger
box, readjusting the lifting attachment to prevent the
extension cylinder from falling to the ground when
the outrigger beam clears the outrigger box.
