D6T Track-Type Tractor Hydraulic System Caterpillar

Piston Pump (Steering)

Usage:

D6T XL DTD

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Illustration 1	g02720067

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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

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Illustration 2	g02720068

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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

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Illustration 3	g02720069

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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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