777D and 777E Off-Highway Truck Steering System Steering Cylinder Caterpillar


Steering Cylinder
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Illustration 1g06604931

Table 1
Item  Qty  Part  Specification Description 
173-9682 Bolt  Torque to 3100 ± 350 N·m (2286 ± 258 lb ft)
D1  6E-1500 Piston  Diameter over two lands is 88.40 ± 0.03 mm (3.480 ± 0.001 inch)
D2  417-0585 Steering Cylinder  Bore is 88.90 ± 0.08 mm (3.500 ± 0.003 inch)
D3  417-0583 Rod As  Diameter is 63.450 ± 0.038 mm (2.4980 ± 0.0015 inch)
D4  376-0011 Head  Bore over four lands is 63.78 ± 0.05 mm (2.511 ± 0.002 inch).
Before assembly, lubricate the threads of the head with clean grease.
Torque to 600 ± 130 N·m (443 ± 96 b ft)
528-2454 Buffer Seal As  Lubricate the sealing lip lightly with the lubricant being sealed.
Assemble with step up side oriented to the pressure side. 
391-0229 U-Cup Seal  Lubricate the sealing lip lightly with the lubricant being sealed. 
550-7464 Wiper Seal  Lubricate the sealing lip lightly with the lubricant being sealed. 
Before assembly, apply Loctite® 609 to the wiper seal groove.