446D Backhoe Loader Axles, Differential and Brakes Caterpillar

Adjustment Procedure For The Wheel Bearings

Illustration 1	g00338232
Front Spindle and Wheel (1) Cap. (2) Cotter. (3) Nut.

1. Raise the front wheel slightly off the ground.

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

3. Remove the cap (1) .

4. Remove the cotter (2) .

5. Loosen the nut (3) .

6. Tighten the adjusting nut (3) until the Flange has a slight bind.

7. Turn the nut (3) counterclockwise to the nearest locking hole. Install the cotter (2) in the locking hole.

8. Install the cap (1) .

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

10. Repeat steps 1 through 9 for the opposite wheel.

Adjustment Procedure For The Toe-In

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Illustration 2	g01039866
Front Axle (1) Adjustment rod. (2) Wrench flats. (3) Cylinder rod. (4) Locknut. (5) Tie rod locknut. (6) Tie rod joint. (A) Distance from the cylinder rod end to the face of the cylinder head. (B) Distance in front of the axle from the trunnion to the wheel. (C) Distance behind the axle from the trunnion to the wheel.

1. Raise the front wheel slightly off the ground.

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

Note: 9S-3263 Thread Lock Compound can be applied to the tie rod joint (6) .

3. Tighten the tie rod joint (6) with 9S-3263 Thread Lock Compound to 250 ± 40 N·m (184 ± 30 lb ft).

4. Tighten the locknut (4) to 340 ± 40 N·m (250 ± 30 lb ft).

5. Position the cylinder rod (3) until dimension (A) is equal on both sides.

6. Loosen the tie rod locknut (5) .

7. Use the wrench flats (2) to adjust the adjustment rod (1) until dimension (B) is less then dimension (C) by 3 mm (0.12 inch).

8. Tighten the tie rod locknut (5) .

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

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