TM 5-3805-280-24-2
Hydraulic System
CAUTION: To avoid injury from escaping fluid
under pressure, stop engine, and relieve the
pressure in the system before disconnecting
hydraulic or other lines. Tighten all connections
before applying pressure.
6. Disconnect hydraulic lines (F) and lubricant line (G).
7. Remove parts (H--K) to remove arm cylinder (A). Take
notice of location of washers (I) for assembly.
8. Repair or replace cylinder.
9. Install washers (I) equally on each side of cylinder
head and rod ends to get the minimum amount of
clearance in joints.
10. Align pin bores so dust seals are not damaged as
arm cylinder-to-boom pin (J) is installed.
Install pin (H) and retainer ring (K).
11. Connect lubricant line (G) and hydraulic lines (F).
IMPORTANT: Trapped air suddenly compressed in a
cylinder is heated and ignites the oil
A--Arm Cylinder
F--Arm Cylinder Head End-to-Arm Section
used for assembly causing cap seal and
Bottom Port Line
ring damage. Start with cylinder rod
--Arm Cylinder Rod End-to-Arm Section Top
retracted and the rod end filled with
Port Line
clean oil. Connect the cylinder head end
G--Lubricant Line
and lines. Operate function to slowly
H--Pin
I--Washer (As Required)
extend cylinder rod. Procedure will
J--Arm Cylinder-to-Boom Pin
eliminate most of the air and reduce the
K--Retainer Ring
possibility of cap seal and ring damage.
12. Start the engine.
Slowly extend cylinder to align pin bores so dust
seals are not damaged as arm cylinder-to-arm pin is
installed.
Install pin and retainer ring.
33
13. Lubricate all pivot joints. (See Track Adjuster,
3360
Working Tool Pivot, Swing Bearing, and Swing
149
Bearing Gear Grease in Group 0004.)
Continued on next page
TX,33,UU3811
1922SEP984/5
21-181
