374D Excavator Machine System Specifications Stick Cylinder Caterpillar


Stick Cylinder
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Illustration 1g02146473

(1) 6E-0781 Bushing

Inside diameter ... 130.32 ± 0.02 mm (5.131 ± 0.001 inch)
Outside diameter ... 154.270 ± 0.013 mm (6.0736 ± 0.0005 inch)
Installation depth of the bushing in the cap assembly ... 10.0 ± 0.3 mm (0.39 ± 0.01 inch)
Installation depth of the bushing in the rod assembly ... 10.0 ± 0.5 mm (0.39 ± 0.02 inch)

(2) Use any one of the following methods to tighten the special locknut:

Lubricate the threads of the special locknut with hydraulic oil and tighten to the following torque. ... 20000 ± 1000 N·m (14751 ± 738 lb ft)
Lubricate the threads of the special locknut with molybdenum disulfide and tighten to the following torque. ... 14700 ± 735 N·m (10842 ± 542 lb ft)

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

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

(A) Outside diameter of the piston

Diameter of the piston over the front two lands ... 208.90 ± 0.03 mm (8.224 ± 0.001 inch)
Diameter of the piston over the rear two lands ... 208.0 ± 0.1 mm (8.190 ± 0.004 inch)

(B) Diameter of the rod assembly ... 144.93 ± 0.03 mm (5.706 ± 0.001 inch)

(C) Bore of the cylinder assembly ... 210.050 ± 0.025 mm (8.2697 ± 0.0010 inch)

(D) Bore of the head over two lands ... 145.63 ± 0.03 mm (5.733 ± 0.001 inch)

(5) Free linear movement of the stop after assembly ... 0.50 ± 0.28 mm (0.020 ± 0.011 inch)

(6) Maximum outside diameter of two retaining rings after assembly ... 91.5 mm (3.60 inch)

(7) The slit of the seal ring must turn in the direction of the piston.

(8) 155-9100 Bushing

Outside diameter ... 150.153 ± 0.033 mm (5.9115 ± 0.0013 inch)
Thickness ... 2.475 ± 0.025 mm (0.0974 ± 0.0010 inch)

(9) Lubricate the sealing lip of the buffer seal lightly with the lubricant that is being sealed.

(10) Lubricate the sealing lip of the U-cup seal lightly with the lubricant that is being sealed.

(11) Lubricate the sealing lip of the lip type seal lightly with the lubricant that is being sealed.

(12) Before assembly, apply green Loctite 609 to the groove of the wiper seal.

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