768C TRACTOR & 769C TRUCK STEERING SYSTEM SPECIFICATIONS Caterpillar

(2) Torque for 24 nuts with 2P2506 Anti-Seize Compound on threads ... 890 ± 40 lb. ft.(1205 ± 55 N·m)

WHEEL BEARING ADJUSTMENT

Wheel Bearing Adjustment (Expander Tube-Type Brakes)

Wheel Bearing Adjustment (Caliper Disc-Type Brakes)

1. Install wheel and bearings on axle.

2. Install retainer (4) with three bolts (5) evenly spaced (no shims).

3. Tighten bolts (5) to a torque of 50 lb. ft. (70 N·m) while the wheel is turned.

4. Measure the distance through the two holes with threads in retainer (4). Find the average of the two measurements.

5. Remove the bolts and retainer (4). Measure the thickness of the retainer near the holes with threads. Find the average of these measurements.

6. The difference between the average measurements in Steps 4 and 5 plus .010 in. (0.25 mm) is the correct thickness of shims (3) to use.

7. Install the correct thickness of shims (3), retainer (4) and bolts (5). While the wheel is turned, tighten bolts (5) to a torque of:

Expander tube-type brakes ... 150 ± 20 lb. ft.(205 ± 25 N·m)

Caliper disc-type brakes ... 185 ± 10 lb. ft.(250 ± 14 N·m)

AXLE INSTALLATION

1. Put the axle on strut rod (1). Install plate (7), no shims (6), with three bolts (8). There must not be more than two bolt holes between the three bolts. Torque for the three bolts is 100 ± 15 lb. ft. (135 ± 20 N·m).

2. Measure the distance through three of the bolt holes, between the bolts, to the end of strut rod (1). Find the average of these measurements.

3. Remove the bolts and plate (7). Measure the thickness of the plate near the three holes where the distance measurements were made. Find the average for the thickness measurements.

4. The difference between the average measurements in Steps 2 and 3 less .075 ± .001 in. (19.05 ± 0.03 mm) is the correct thickness of shims (6) to use.

NOTE: The thickness of shims (6) to use must no be less than .025 in. (0.64 mm).

5. Install the correct thickness shims (6), plate (7) and bolts (8). Torque for bolts (8) is 500 ± 25 lb. ft. (680 ± 35 N·m).

NOTE: After the correct thickness shims, plate and bolts are installed and the bolts tightened the clearance between the end of strut rod (1) and plate (7) can be .000 to .005 in. (0.00 to 0.13 mm).

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To avoid possible personal injury from the sudden release of the spindle from the strut rod or the snapping of a bolt when removing plate (7), loosen all bolts (8) one-half turn. Do this again and again until the torque for the bolts is released.