784C and 785C Off-Highway Truck/Tractors Steering System Caterpillar

Illustration 1	g00928358
Typical top view of the steering linkage (1) Clamps on left side tie bar (2) Clamps on right side tie bar (B) Distance between the front tires at the back (F) Distance between the front tires at the front

Procedure

1. Lift the front of the truck until the front wheels are off the ground and the strut rods in the suspension cylinders are fully extended.

2. Move the wheels to a straight ahead position.

3. Measure distance (F) between the front tires. Mark the measurement locations of distance (F) on each tire.

4. Rotate the tires by 180 degrees.

5. Measure distance (B) between the marks that were made in Step 3.

6. Use Table 1 to determine the correct toe-out when the front wheels are off the ground.
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   Table 1

   Model	Correct Toe-Out
   784C	(B) = (F) - 164.6 mm (6.48 inch)
   785C	(B) = (F) - 48.5 mm (1.91 inch)

7. Use the following procedure to adjust the tie rods in order to get the correct toe-out with the front wheels off the ground:

   1. Loosen clamps (1) and (2) .

   2. Turn each tie rod by the same number of turns in order to get the correct toe-out.

      Note: After adjustment, the tie rods must be of equal length.

Note: Use the following procedure to align the tie rod with the clamp assembly. Failure to correctly locate the clamp assembly on the tie rod could shorten the service life of the tie rod assembly.

Clamp Positioning

Illustration 2	g00928375
View A-A (3) Tie rod (4) Clamp assembly (A) 6.350 ± 1.530 mm (0.25 ± 0.06 inch)

1. Position the clamp assembly (4) on the tie rod (3). Refer to Illustration 2.

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Illustration 3	g00928376
(3) Tie rod (4) Clamp assembly (5) Nut

2. Align the open portion of the clamp assembly (4) with one of the slots in tie rod (3). Refer to Illustration 3.

3. Tighten nut (5) .

Reference: Refer to Specifications, "Steering Linkage and Cylinder Mounting" for additional information.

Note: When the adjustment is correct, there will be a front wheel toe-in when the truck is in normal operation with correctly charged suspension cylinders.