777G Off-Highway Truck Steering System Caterpillar

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine or release of air pressure or oil pressure can cause injury to persons on or near the machine. To help prevent possible injury before testing and adjusting any air system or hydraulic system, perform the procedure in the Testing and Adjusting, "General Information" section.

Introduction

The following procedure will cover the adjustment procedure for the steering shaft cover plate.

Note: Only perform this adjustment procedure with the hydraulic system connected, proper steering pressures adjusted, and the engine running.

Machine Preparation

1. Move the machine to a smooth horizontal location. Move to an area that is free of machines and personnel.

2. Place Transmission selector lever in Park.

3. Lower the body to the frame.

4. Stop the engine.

5. Permit only one operator on the machine. Keep all personnel in the sight of the operator.

Procedure

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Illustration 1	g03831895
View of the plate assembly on the front of the cab (A) Bolt (B) Plate assembly

1. Loosen two bolts (A) that secure plate assembly (B). Plate assembly (B) has a foam seal on the back side, loosen bolts (A) enough to allow plate assembly (B) to move freely.

   Note: Prying plate assembly (B) loose from the cab may be required.

2. With the engine running, rotate the steering wheel fully from left to right and back again. As the steering column rotates, find the center point of plate assembly (B) the point at which the column can rotate freely, without rubbing on the inside of the tubular section of plate assembly (B) .

3. After adjusting plate assembly (B), tighten bolts (A), alternating from bolt to bolt as tightening. Ensure that plate assembly (B) is tightened evenly in order to prevent plate assembly (B) from twisting and causing the column to rub on plate assembly (B) .

4. Before bolts (A) are tight, rotate the steering wheel one last time in order to ensure proper adjustment.

5. Torque bolts (A) to 30 ± 7 N·m (22 ± 5 lb ft)