325C Excavator Machine System Specifications Caterpillar

Illustration 1	g01450102

Note: During the press fit, insert the sleeve bearing (1) in the cap assembly with the tapered side first.

(1) 163-3748 Sleeve Bearing

Inside diameter ... 70.11 ± 0.02 mm (2.760 ± 0.001 inch)

Outside diameter ... 85.102 ± 0.011 mm (3.3505 ± 0.0004 inch)

Installation depth of the sleeve bearing in the cap assembly ... 7.35 ± 0.30 mm (0.289 ± 0.012 inch)

Note: Lubricate the face and the threads of the locknut (2) with 248-7522 Hydraulic Oil before assembly.

(2) Torque for the locknut ... 7600 ± 380 N·m (5600 ± 280 lb ft)

(3) Lubricate the inside diameter and outside diameter of the seal with clean grease.

(4) Lubricate the inside diameter and outside diameter of the three rings with clean grease.

(A) Outside diameter of the piston over two lands ... 128.90 ± 0.03 mm (5.075 ± 0.001 inch)

(B) Bore of the cylinder assembly ... 130.00 ± 0.10 mm (5.118 ± 0.004 inch)

(C) Outside diameter of the rod assembly ... 89.930 ± 0.038 mm (3.5405 ± 0.0015 inch)

(D) Bore of the head over two lands ... 90.630 ± 0.030 mm (3.5681 ± 0.0012 inch)

(5) 137-2820 Sleeve Bearing

Inside diameter ... 80.25 ± 0.02 mm (3.1594 ± 0.0008 inch)

Outside diameter ... 95.180 ± 0.013 mm (3.7472 ± 0.0005 inch)

Installation depth of the sleeve bearing in the rod assembly ... 7.5 ± 0.3 mm (0.30 ± 0.01 inch)

(6) Lightly lubricate the sealing lip of the buffer seal with the lubricant that is being sealed.

(7) Lightly lubricate the sealing lip of the U-cup seal with the lubricant that is being sealed.

(8) Lightly lubricate the sealing lip of the lip type seal with the lubricant that is being sealed.

(9) Apply 4C-9506 Retaining Compound to the wiper seal groove before assembly.