TM 5-3805-280-24-2
Hydraulic System
1--Pump Housing
22--Pin (2 used)
41--Cylinder Head (Cover)
64--Pump Pressure Sensor
3--Rear Pump Drive Shaft
23--Spring (2 used)
42--Servo Piston (2 used)
(2 used)
4--Front Pump Drive Shaft
25--Cylinder Block (Rotor)
43--Pin (2 used)
64A--O-Ring (2 used)
6--Roller Bearing (2 used)
(2 used)
44--Set Screw (2 used)
67--Plug (Fitting) (2 used)
7--Ring (2 used)
27--Front Pump Valve
46--O-Ring (2 used)
67A--O-Ring (2 used)
8--Roller Bearing (2 used)
Plate
47--Stop (2 used)
69--Pump Regulator (2
9--Bearing Nut (2 used)
28--Rear Pump Valve Plate
50--O-Ring (2 used)
used)
10--Ring (Rear Pump Drive
29--Dowel Pin (4 used)
51--Cover (2 used)
72--Spring Pin (4 used)
Shaft Only)
31--Feedback Link (2
54--O-Ring (20 used)
73--O-Ring (4 used)
12--Oil Seal (2 used)
used)
55--Cap Screw (16 used)
74--O-Ring (2 used)
13--Snap Ring (2 used)
32--Lever (4 used)
56--Lock Washer (16 used)
80--Plug (Fitting) (2 used)
15--Special Fitting (2 used)
33--Dowel Pin (4 used)
57--Backup Ring
80A--O-Ring
16--O-Ring (2 used)
34--Dowel Pin (2 used)
58--Spring Pin (2 used)
82--Bracket
19--Piston (14 used)
35--Snap Ring (12 used)
59--O-Ring
83--Cap Screw
21--Center Shaft (2 used)
36--Dowel Pin (2 used)
60--Cap Screw (12 used)
84--Lock Washer
Tighten set screw (44) using a 6 mm hex key
14. Apply oil to center shaft (21), pistons (19) and
wrench.
cylinder blocks (25). Use petroleum jelly to hold
pin (22) in hole in center shaft.
Servo Piston-to-Pin Set Screw--Specification
15. Install cylinder block so pin engages slot in
Torque.................................................................... 34 Nm (300 lb-in.)
cylinder block.
Tighten cap screws (55) for stop (47) and cover (51).
16. Apply thread lock and sealer (medium strength) to
threads of dowel pins (29). Tighten dowel pins into
Stop and Cover-to-Cylinder Head Cap Screw--Specification
front pump (27) and rear pump (28) valve plates.
Torque................................................................. 19.5 Nm (180 lb-in.)
Dowel Pin-to-Front and Rear Pump Valve Plate--Specification
19. Install cylinder head (41) checking to be sure that
Torque..................................................................... 9.8 Nm (86 lb-in.)
pins engage middle hole in valves plates.
IMPORTANT: The front pump (27) and rear pump
Tighten cap screws (60).
(28) valve plates are not
interchangeable. The inlet port in
Cylinder Head-to-Pump Housing Cap Screw--Specification
valve plate is located towards the
center and top of pump housing.
Torque..................................................................... 108 Nm (80 lb-ft)
17. Apply oil to valve plates.
20. Remove air bleed plugs from pump regulators
(69).
Install valve plates so inlet port is towards the
center and top of pump housing.
Install regulators making sure groove in remote
control sleeve and load sleeve engage dowel pin
Connect levers (32) for feedback linkage to valve
(34) in feedback link (31). Check through hole that
plates.
groove in sleeves engage dowel pin.
18. Install servo pistons (42) and pins (43).
33
3360
Apply thread lock and sealer (medium strength) to
45
threads of set screw (44).
Continued on next page
TX,33,UU3784
1921SEP986/9
21-84
