325, 325B and 325L Excavators Caterpillar

Illustration 1	g00872199

(1) Torque for two stoppers ... 140 ± 14 N·m (105 ± 10 lb ft)

Before assembly, apply a small amount of hydraulic oil on the sliding surfaces of the following parts:

• piston (2)

• guide (3)

• barrel (4)

• piston assembly (8)

• spool (14)

(5) Torque for nine bolts ... 177 ± 18 N·m (131 ± 13 lb ft)

(6) 096-1521 Shim

Thickness of one shim ... 1.0 mm (0.039 inch)

096-3785 Shim

Thickness of one shim ... 1.2 mm (0.047 inch)

096-3786 Shim

Thickness of one shim ... 1.4 mm (0.055 inch)

096-3787 Shim

Thickness of one shim ... 1.6 mm (0.063 inch)

096-3788 Shim

Thickness of one shim ... 1.8 mm (0.071 inch)

096-1522 Shim

Thickness of one shim ... 2.0 mm (0.079 inch)

To ensure that the following conditions are fulfilled, install shims (6) :

• When parking brake release port (11) is vented to the air, the motor output shaft does not rotate with a torque of 324 N·m (239 lb ft) or less.

• When pressure at parking brake release port (11) is 780 kPa (115 psi), the motor output shaft rotates with a torque of 29 N·m (21 lb ft) or less. Both the inlet port and the outlet port must be open to the hydraulic tank.

Note: During this test, turn the output shaft clockwise.

(7) Apply 5P-3413 Sealant to the seal.

(9) 096-4389 Spring

Free length ... 33.7 mm (1.33 inch)

Outside diameter ... 7.5 ± 0.2 mm (0.30 ± 0.01 inch)

Inside diameter ... 3.5 mm (0.14 inch)

(10) 095-7380 Spring

Free length ... 15.0 mm (0.59 inch)

Outside diameter ... 11.7 mm (0.46 inch)

Inside diameter ... 8.9 ± 0.10 mm (0.35 ± 0.004 inch)

(12) Torque for ten plugs ... 14.7 ± 1.5 N·m (11 ± 1 lb ft)

(13) 096-3978 Spring

Free length ... 34.7 mm (1.37 inch)

Outside diameter ... 14.0 ± 0.1 mm (0.55 ± 0.004 inch)

Inside diameter ... 10.4 mm (0.41 inch)