TM 5-3805-280-24-2
Hydraulic System
IMPORTANT: Trapped air suddenly compressed in a
cylinder is heated and ignites the oil
used for assembly causing cap seal and
ring damage. Start with cylinder rod
retraced and the rod end filled with
clean oil. Connect the cylinder head end
and lines. Operate function to slowly
extend rod. Procedure will eliminate
most of the air and reduce the
possibility of damage.
13. Start the engine.
Slowly extend boom cylinder (F) to align pin bores so
dust seals are not damaged as cylinder-to-boom pin
(E) is installed.
14. Install shims (D) to get the minimum amount of
clearance between boom and cylinder rod end.
Install retainer (B), pin (C) and retainer ring (A).
15. Connect lubricant line.
Lubricate all pivot joints. (See Track Adjuster,
Working Tool Pivot, Swing Bearing, and Swing
Bearing Gear Grease in Group 0004.)
16. Bleed air from cylinder.(See Hydraulic Cylinder Bleed
A--Retainer Ring
Procedure in this group.)
B--Retainer
C--Pin
D--Shim (As Required)
17. Check oil level in hydraulic oil tank. Add oil as
E--Boom Cylinder-to-Boom Pin
necessary. (See Hydraulic Oil in Group 0004.)
F--Boom Cylinder
TX,33,UU3810
1922SEP985/5
REMOVE AND INSTALL ARM CYLINDER
33
3360
147
1. Park machine on a firm, level surface.
Retract arm and bucket cylinders. Lower boom so
bucket in on the ground.
Stop the engine.
Continued on next page
TX,33,UU3811
1922SEP981/5
21-179