308C CR Excavator Hydraulic System – Stick Cylinder



Illustration 1 g00857906

(1) Torque the locknut with lubricant on threads. … 1800 ± 90 N·m (1320 ± 65 lb ft)

(2) Before installing the seal assembly, fill the clearances with grease in order to remove the air.

(3) Install the seal ring with the groove toward the piston.

(4) Diameter of new rod assembly … 59.930 ± 0.030 mm (2.3594 ± 0.0012 inch)

(5) Bore of new cylinder assembly … 90.080 ± 0.030 mm (3.5464 ± 0.0012 inch)

(6) Cylinder head

Bore of new cylinder head … 60.63 ± 0.03 mm (2.387 ± 0.001 inch)
Torque for cylinder head … 550 ± 55 N·m (410 ± 41 lb ft)

(7) Drill a hole 4.5 mm (0.177 inch) in diameter to the depth of dimension (D). Backup ring (7) fits in the hole. Dimension (D) … 17.50 ± 0.50 mm (0.689 ± 0.020 inch)

Apply 8T-9016 Gasket Sealant in the hole for the backup ring.

(8) The stopper assembly must have a clearance of 0.50 ± 0.26 mm (0.020 ± 0.010 inch) in the axial direction.

(9) Outside diameter of the ring must be 42.0 mm (1.65 inch) or less after installation.

(10) Lubricate the sealing lip slightly with the lubricant that is being sealed before installation.

(11) Apply 7M-7456 Bearing Mount Compound to the wiper seal groove before installing.