D6T Track-Type Tractor Hydraulic System Piston Pump (Steering) Caterpillar


Piston Pump (Steering)
`
1.1. Pump Head Group
2.1. Pump Rotating Group



Illustration 1g02720067

Table 1
Specification for 325-9773 Piston Pump Gp    
Item     Qty     Part     Specification Description    
-         -     Main pump displacement per revolution is 71.0 cc (4.3 cubic inch).
Pressure override relief is
42000 ± 1000 kPa (6090 ± 145 psi).
Cross over relief is
45000 ± 750 kPa (6525 ± 110 psi).
Charge pump displacement is
19.6 cc (1.2 cubic inch).
Charge relief pressure is
2500 ± 100 kPa (365 ± 15 psi).    
1     3     9T-3928 Plug As     Torque to
10 N·m (89 lb in).    
2     5     9S-8002 O-Ring Plug     Torque to
15 N·m (133 lb in).    
3     1     9S-8004 O-Ring Plug     Torque to
25 N·m (221 lb in).    
4     1     123-7575 Lock Screw     Torque to
140 N·m (103 lb ft).    
5     1     126-1661 Plug     Torque to
22 N·m (195 lb in).    
6     1     123-7583 Orifice     Torque to
3 N·m (27 lb in).    
7     2     081-3801 Plug As     Torque to
60 N·m (44 lb ft).    
8     1     9S-8008 O-Ring Plug     Torque to
147 N·m (108 lb ft).    
9     1     9S-8005 O-Ring Plug     Torque to
62 N·m (46 lb ft).    
10     4     3E-8008 Bolt     Torque to
310 N·m (230 lb ft).    
11     1     1G-3176 Lock Screw     Torque to
3 N·m (27 lb in).    

Pump Head Group




Illustration 2g02720068

Table 2
Specification for 325-9773 Piston Pump Gp    
Item     Qty     Part     Specification Description    
12     1     204-1455 Sealing Nut     Torque to
22 N·m (195 lb in).    
13     2     1G-7407 Relief Valve Gp     Torque to
150 N·m (110 lb ft).    
14     3     087-4772 O-Ring Plug     Torque to
5 N·m (44 lb in).    
15     1     202-2342 Spring     Free length is
35 mm (1.4 inch)    
16     1     6E-4240 Sealing Nut     Torque to
44 N·m (32 lb ft).    

Pump Rotating Group




Illustration 3g02720069

Table 3
Specification for 325-9773 Piston Pump Gp    
Item     Qty     Part     Specification Description    
17     As required use the following shims to obtain dimension (C) :    
1 142-9433 Shim     Thickness is
0.60 mm (0.024 inch).    
1 142-9432 Shim     Thickness is
0.80 mm (0.032 inch).    
1 142-9431 Shim     Thickness is
1.00 mm (0.039 inch).    
1 142-9430 Shim     Thickness is
1.20 mm (0.047 inch).    
C     -     -     Dimension is
108.5 to 108.7 mm (4.27 to 4.28 inch).    
18     1     142-9438 Coil Spring     Free length is
39.3 mm (1.55 inch).    

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