784C and 785C Off-Highway Trucks Machine Systems Caterpillar

Steering Cylinder - Install

Usage:

785C 1HW

Installation Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	4C-3386	Spanner Wrench	1
B	5S-6084	Socket (3 1/2 inch)	1
	478-3993	Hydraulic Torque Wrench	1
	385-3995	Hydraulic Pump Gp	1
	384-8916⁽¹⁾	Hydraulic Pump Gp	1
D	1U-7505	Transmission Jack	1
D	485-8004	Support Stand	1
E	-	Retaining Ring Pliers	1
F	-	Loctite Graphite-50	-

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⁽¹⁾	Available Substitute

Note: Cleanliness is an important factor. Before the assembly procedure, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble.

Verify that all the components are clean and free of foreign material prior to installation.
Inspect all the components for wear and replace the components, if necessary.
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Illustration 1 g00944289
Prior to installation, lower the temperature of bearing (10) to a temperature of −45°C (−49°F).
Use a suitable press to install bearing (10) around ball stud (6). Install retaining ring (9) on the ball stud.
Repeat Steps 3 and 4 for the opposite side of the steering cylinder.
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Illustration 2 g00944287
Support the weight of steering cylinder (4) with Tooling (D). The weight of the steering cylinder is approximately 136 kg (300 lb).
Apply Tooling (F) to the threads of the ball stud and on the taper of the ball stud.
Install steering cylinder (4) in the truck.
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Illustration 3 g00944303
Apply Tooling (F) to the face of locknut (7). Install locknut (7) loosely on ball stud (6).
Repeat Steps 8 and 9 to install the opposite end of the steering cylinder.
Insert Tooling (A) to hold the ball stud (6) while locknut (7) is being tightened.
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Illustration 4 g00944330
Use Tooling (B) to install locknut (7). Tighten locknut (7) to a torque of 2060 ± 100 N·m (1519 ± 74 lb ft).
Repeat Steps 11 and 12 for the opposite end of the steering cylinder.
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Illustration 5 g00944338
Install plug (2). Use Tooling (E) to install retaining ring (5) onto the ball stud. Install retaining ring (5).
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Illustration 6 g00944343

Rod end of cylinder

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Illustration 7 g00944342

Head end of cylinder

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Illustration 8 g00944341

Rod end of cylinder
Install the O-ring seal and connect hose assembly (3) at each end of the steering cylinder.
Install the fitting. Connect the lubrication hose (1) to plug (2) at each end of the steering cylinder.
Repeat Steps 14 through 16 for the opposite end of the steering cylinder.
Repeat Steps 1 through 16 to install the remaining cylinder.
Fill the steering hydraulic tank with hydraulic oil to the correct level. Refer toOperation and Maintenance Manual, SEBU7173, "Steering System Oil - Change" for the proper procedure.