320C and 322C Excavators Attachment Hydraulic System – Boom Cylinder



Illustration 1 g00758977

(1) Install the seal in the bearing bore until dimension (A) is 1.00 ± 0.50 mm (0.039 ± 0.020 inch).

Quantity … 2

(2) Install the seal in the bearing bore until dimension (B) is 1.00 ± 0.50 mm (0.039 ± 0.020 inch).

Quantity … 2

(3) Torque for locknut … 5900 ± 300 N·m (4352 ± 221 lb ft)

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

(5) Install the seal ring with the slit toward the piston.

(6) Rod assembly

Diameter of rod … 84.930 ± 0.030 mm (3.3437 ± 0.0012 inch)

(7) Bore of cylinder … 120.0 ± 0.10 mm (4.72 ± 0.004 inch)

(8) Bore of head … 85.73 ± 0.030 mm (3.375 ± 0.0012 inch)

Note: Make sure that the bearings are installed in the bore so that the identification numbers of the bearings are facing outward.

(9) 163-3753 Sleeve Bearing

Outside diameter … 95.102 ± 0.011 mm (3.7442 ± 0.0004 inch)
Inside diameter … 80.25 ± 0.020 mm (3.159 ± 0.0008 inch)
Install the bearing in the bearing bore. … centered

(10) 163-3746 Sleeve Bearing

Outside diameter … 95.102 ± 0.011 mm (3.7442 ± 0.0004 inch)
Inside diameter … 80.25 ± 0.020 mm (3.159 ± 0.0008 inch)
Install the bearing in the bearing bore. … centered

(11) Lubricate the sealing lip slightly with the lubricant that is being sealed.

(12) Apply 7M-7456 Bearing Mount Compound to the wiper seal groove prior to assembly.