TM 5-3805-280-24-2
Hydraulic System
1--Housing--4-Spool
28--O-Ring
49--Spacer
65--Spring
2--Flow Combiner Valve
29--Sleeve
50--Spring
66--Bucket Flow Control
Spool
30--Load Sense Valve
53--Bucket Flow Control
Valve Pilot Spool
3--Pilot Pressure Inlet
Spool
Valve
69--Cap Screw (12 used)
Fitting, Filter and
31--O-Ring
54--Housing
70--Pipe Plug
O-Rings
32--Sleeve
55--Bucket Flow Control
71--Plug
4--Plug and O-Ring
33--Relief Valve Spool
Valve Housing
72--O-Ring
5--Spring
34--Spring Seat
56--Bucket Flow Control
73--Backup Ring
11--Check Valve Poppet (3
35--Spring
Valve Pilot Spool
74--Cover
used)
36--O-Ring
57--Spring Seat
75--Cap Screw (4 used)
13--Check Valve Poppet (2
37--Plug
58--Spring
76--O-Ring
used)
38--O-Ring
59--O-Ring
81--O-Ring (7 used)
14--Spring (5 used)
39--Washer
60--Plug (2 used)
82--O-Ring
24--Front Pump Control
40--Lock Nut
61--Snap Ring
83--O-Ring
Valve
41--Adjusting Screw
62--Spring Seat
25--Snap Ring
47--Bucket Flow Control
63--Plug and O-Ring (6
26--Spring Seat (2 used)
Valve Poppet
used)
27--Spring
48--Spring
64--Plug and O-Ring
NOTE: The letters, A--E, are used in the illustration to
Tighten housing-to-control valve housing cap screws
indicate the location of parts in housing.
(69).
Bucket Flow Control Valve Housing-to-Control Valve Housing
11. Front pump control valve (24): Disassemble
Cap Screw--Specification
valve for cleaning and inspections only. Valve is
serviced as an assembly. Valve is set at the
Torque....................................................................... 78 Nm (58 lb-ft)
factory so adjustment in the field should not be
necessary. If disassembly of lock nut (40) and
Tighten plugs (60) into housing.
adjusting screw (41) from plug (37) is necessary,
check valve pressure setting after assembly. (See
Pilot Valve-to-Bucket Flow Control Valve Housing Plug--
Pump Control Valve Test in Group 9025-25.)
Specification
Torque....................................................................... 71 Nm (52 lb-ft)
Pull flow sense spool (30) and sleeve (29) from
housing using a M8-1.25 nut on threaded end of
13. Flow combiner valve (2): Tighten plug (4) into
spool.
housing.
Tighten plug (37).
Flow Combiner Valve Spool-to-Control Valve Housing Plug--
Specification
Plug-to-Front Pump Control Valve--Specification
Torque................................................................... 157 Nm (116 lb-ft)
Torque....................................................................... 84 Nm (62 lb-ft)
14. Pilot pressure inlet fitting and filter (3): Tighten
12. Bucket flow control valve (47 and 53): Tighten
fitting into housing.
plug into poppet (47).
Plug-to-Bucket Flow Control Valve Poppet--Specification
Torque.................................................................... 39 Nm (348 lb-in.)
33
3360
105
Continued on next page
TX,33,UU4003
1921SEP9811/17
21-138
