416D, 420D and 430D Backhoe Loaders Axles, Differential and Brakes Caterpillar

Adjustment Procedure For The Toe-In

Illustration 1	g01032991
(A) Distance from the cylinder rod end to the face of the cylinder head (B) Distance in front of the axle from the axle centerline to the wheel (C) Distance behind the axle from the axle centerline to the wheel

Illustration 2	g01020807
The Front Drive and Steering Axle (1) Tie rod nut (2) Locknut (3) Adjustment rod (4) Ball joint (5) Cylinder rod

1. Raise the front wheels slightly off the ground.

2. Install sufficient blocking under the frame and lower the machine to the blocking.

3. Tighten the ball joint (4) to 300 N·m (221 lb ft).

4. Tighten the tie rod nut (1) to 250 N·m (185 lb ft).

5. Position the cylinder rod (5) until dimension (A) is equal on both sides.

6. Loosen the locknut (2) .

7. Adjust the adjustment rod (3) until dimension (B) is less then dimension (C) by 0.0 to 2.0 mm ( 0.0 to 0.08 inch).

8. Tighten the locknut (2) .

9. Perform steps 3 through 8 for the opposite side.

10. Remove the blocking and lower the machine to the ground.

Adjusting the Steering Stop

The following pictures may not show your exact axle.

Illustration 3	g00894957
(4) Knuckle (5) Bolt (6) Locknut

After the wheels have been correctly aligned the maximum steering angle must be adjusted. Each wheel is equipped with a knuckle (4). The knuckle is equipped with two bolts (5) that act as steering stops. Each bolt is secured in place with a locknut (6) .

Park the machine on level ground. Move the transmission control to the NEUTRAL position. Lower the boom and retract the boom. Engage the parking brake.

1. Raise the front of the machine in order to lift the front wheels off the ground. Place the jack in a location that will sustain the weight of the machine such as the axle pads. The axle pad should be parallel to the ground. The head of the jack should be against a flat surface. Use a jack which will support the weight of the machine.

2. Remove both of the front wheels.

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Illustration 4	g01042711
Typical Example

3. Place bar (7) against the outer flange of the final drive on the left side. Secure the bar in place with two existing wheel nuts. Repeat the procedure for the final drive on the right side.

4. Loosen locknuts (6) on all four stop bolts (5). Turn all four bolts (5) clockwise until the bolts bottom out.

5. Hold a long straight bar (8) against the housing for the steering cylinder.

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Illustration 5	g01042726
Typical Example

6. Rotate the left side final drive until the angle (A) that is formed by the two bars measures approximately 33 degrees.

7. Turn stop bolt (5) on the left side knuckle counterclockwise until the head of the screw contacts the steering stop. Secure the screw in place with locknut (6). Tighten locknuts (6) to a torque of 150 N·m (111 lb ft).

8. Repeat step 7 for the stop screw on the right side knuckle that is diagonally opposite.

9. Rotate the final drive on the right side until the angle (A) that is formed by the two bars measures approximately 33 degrees.

10. Turn stop bolt (5) on the right side knuckle counterclockwise until the head of the bolt contacts the steering stop. Secure the screw in place with locknut (6). Tighten locknuts (6) to a torque of 150 N·m (111 lb ft).

11. Repeat step 10 for the stop screw on the left side knuckle that is diagonally opposite.

12. Remove measuring bars (7) and (8) .

13. Replace both wheels and lower the machine to the ground.