Outrigger Extension Cylinder
The four extension cylinders have 1.5 in. (6.35 cm)
front of the extension cylinder barrel to wipe dirt from
diameter bores. The cylinders are the double-acting-
the rod as it is retracted. Each cylinder has a
type and are mounted to the outrigger beams. O-
retracted length of 84 in. (213.4 cm) from the center
rings are used within the cylinders to prevent internal
of the rod bushing to the center of the cylinder
and external leakage. A wiper ring is mounted to the
bushing. The extended length is 149.6 in. (379.9
For Removal and Installation procedures, refer to EXTENSION
CYLINDER in Section 12.
Withdraw the cylinder rod assembly from the
Any maintenance requiring disassembly
Cover the cylinder barrel opening to
of cylinders should be accompanied by
replacement of all cylinder seals.
Unscrew the collar from the cylinder barrel,
Secure the cylinder rod from moving at the rod
refer to Figure 2-8-32.
end; remove the piston locknut from the rod.
Remove the piston from the rod.
Do not use air pressure to cycle or
pressurize the cylinder. Use only a
source of controlled hydraulic oil
pressure if the rod assembly is hard to
When removing seals and rings, avoid
scratching the grooved and gland
Remove the two piston seals from the piston
Exercise extreme care when handling or
and the O-ring from the rod.
setting down the cylinder rod. Damage
to the rod surface may cause
Remove the spacer.
unnecessary maintenance and expense.
Remove the head from the rod and remove the
gland seal from the out side of the head and the rod
seal and wiper seal from the inside of the head.