140 GC Motor Grader Systems Caterpillar

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.

References

Reference: Refer to the Operation and Maintenance Manual, "Prepare the Machine for Maintenance".

Introduction

The following procedure will explain the steps for adjusting the front axle toe-in.

Required Tools

Test Preparation

1. Move the machine to a smooth horizontal location.

2. Chock the wheels.

3. Lower all the implements to the ground.

4. Raise the front wheels off the ground.

5. Install the wheel lean locking pin into the lean bar.

Adjustment Procedure

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Illustration 1	g01380022
(1) Clamps (2) Tie rod (A) Distance (B) Distance

1. Attach a short level with a magnetic base to the outside of each front wheel spindle or rim.

2. Rotate the tires until the levels are both horizontal. Mark a V on the front of each front tire at spindle height near the center of the tread.

3. With Tooling (T1) measure the distance (A) between the V marks on each tire. Use the sharp point inside each V for the measuring points.

4. Without touching the levels, rotate the tires so that the V marks are at the rear and the levels are again horizontal.

5. With Tooling (T1) measure the distance (B) between the V marks.

6. Compare measurements (A) and (B). The toe-in is correct if measurement (A) is less than measurement (B). Measurement (A) is at the front of the front tires. Measurement (B) is at the rear of the front tires. Measurement (A) should be 6.0 ± 3.0 mm (0.24 ± 0.12 inch) smaller than measurement (B).

7. Adjust the toe-in, as needed. Loosen clamps (1) on tie rod (2). Rotate tie rod (2) in the direction that is need to achieve the correct toe-in for the front wheels. When the toe-in adjustment is correct, orient clamps (1), as shown. Tighten clamps (1) to a torque of 75 ± 7 N·m (55 ± 5 lb ft).

8. Remove the wheel lean lock pin.

9. Lower the front wheels to the ground.

10. Remove the wheel chock and return machine to service.