TM 5-3805-280-24-2
Hydraulic System
1--Housing--5-Spool
23--O-Ring
39--Check Valve Poppet
69--Cap Screw (2 used)
2--Swing Spool
24--Spring
40--Spring
77--Plug
3--Arm I Spool
25--Spring Seat
41--Spacer
78--Plug
4--Boom II Spool
26--Reduced Leakage
50--System Relief Valve
81--O-Ring
5--Auxiliary Spool
Valve Spool
51--Arm In Circuit Relief
82--O-Ring
8--Special Cap Screw (5
27--O-Ring
and Anti-Cavitation
83--O-Ring (6 used)
used)
28--Plug
Valve
84--O-Ring (3 used)
9--Spring Seat (10 used)
34--Sleeve
52--Plug, O-Ring, Backup
85--O-Ring (3 used)
10--Spring
35--Propel-Boom Down
Ring and O-Ring (2
86--O-Ring (10 used)
11--Left Propel Spool
Selector Spool
used)
88--O-Ring
16--Arm Reduced Leakage
36--Spring
59--Bottom Pilot Cap
90--O-Ring
Check Valve Poppet
37A--Arm Regenerative
60--Top Pilot Cap
91--O-Ring
17--Spring
Valve Spool
62--Arm In Reduced
92--Backup Ring
18--Spacer
37B--O-Ring
Leakage Valve
93--Backup Ring
20--Plug
37C--Backup Ring
Housing
95--Arm Out Circuit Relief
21--O-Ring
37D--Spacer
65--Plug and O-Ring
and Anti-Cavitation
22--Spacer
38--Spring
68--Cap Screw (12 used)
Valve
System Relief Valve 27 mm Nut--Specification
IMPORTANT: The spools (11, and 14--17) are
select fitted to bores in housing and
Torque....................................................................... 64 Nm (47 lb-ft)
are a different design for each
function. Spools must be installed
Tighten bottom nut.
into the same bores from which they
were removed for proper operation
System Relief Valve 32 mm Nut--Specification
of machine.
Torque....................................................................... 83 Nm (61 lb-ft)
NOTE: The letters, A--I, are used in the illustration to
indicate the location of parts in housing.
Tighten valve into housing.
System Relief Valve-to-Housing--Specification
5. Circuit relief and anti-cavitation valve (51 and
95): Disassemble valves for cleaning and inspection
Torque....................................................................... 83 Nm (61 lb-ft)
only. Valves are serviced as assemblies.
Check and adjust pressure setting for system relief
Tighten valves into housing.
valve and power boost after assembly. (See System
Relief and Power Boost Valve Test and Adjustment in
Circuit Relief and Anti-Cavitation Valve-to-Housing--
Group 9025-25.)
Specification
Torque....................................................................... 83 Nm (61 lb-ft)
7. Arm in reduced leakage valve: Spring (24) may
force spacer (22) out of housing (62).
Check and adjust pressure setting. (See Circuit Relief
Valve Test and Adjustment in Group 9025-25.)
Pull spacer (18) from housing (1) using a M5-0.8
cap screw.
6. System relief valve (50): Disassemble valve for
cleaning and inspection only. Valve is serviced as
Tighten cap screws (69).
an assembly.
33
Tighten top nut.
3360
101
Continued on next page
TX,33,UU4003
1921SEP988/17
21-135
