793C and 793C XQ Off-Highway Truck Hydraulic System Hoist Cylinder Caterpillar


Hoist Cylinder
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793C and 793C XQ Off-Highway Truck Hydraulic System [SENR1457]
HYDRAULIC SYSTEM
CYLINDER GP
793C and 793C XQ Off-Highway Truck Hydraulic System Hoist Cylinder


Illustration 1g06266523

(1) Before assembly, Lubricate the threads.

Torque for eight bolts ... 900 ± 100 N·m (664 ± 74 lb ft)

(A) Rod diameter during the second stage

Outside diameter of the rod ... 196.80 ± 0.04 mm (7.748 ± 0.002 inch)
Inside diameter of head (5) which includes the three lands ... 197.46 ± 0.03 mm (7.774 ± 0.001 inch)
Inside diameter of piston (4) ... 196.95 ± 0.025 mm (7.754 ± 0.001 inch)

(B) Bore diameter during the second stage

Inside diameter of the cylinder tube ... 254.04 ± 0.10 mm (10.002 ± 0.004 inch)
Outside diameter of piston (4) which includes the two lands ... 253.50 ± 0.03 mm (9.980 ± 0.001 inch)

(C) Bore diameter during the first stage

Inside diameter of the cylinder tube ... 323.95 ± 0.10 mm (12.754 ± 0.004 inch)
Outside diameter of the cylinder tube which includes the two lands ... 321.82 ± 0.13 mm (12.670 ± 0.005 inch)

(D) Rod diameter during the first stage

Outside diameter of the cylinder tube ... 292.05 ± 0.04 mm (11.498 ± 0.002 inch)
Inside diameter of head (2) ... 292.18 ± 0.03 mm (11.503 ± 0.001 inch)

(2) Head

(3) Torque for 16 bolts ... 900 ± 100 N·m (664 ± 74 lb ft)

(4) Piston

(5) Before assembly, apply Loctite 609 to the head threads.

Torque for head ... 1800 ± 130 N·m (1328 ± 96 lb ft)

(6) Lubricate the sealing lip lightly with lubricant that is being sealed.

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