D250E Series II and D300E Series II Articulated Trucks Power Train Caterpillar

Installation Procedure

Note: Make sure that the machine is properly supported in order to install the wheels. See Operation and Maintenance, "Jacking Locations" .

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Illustration 1	g00519811

1. Make sure that the rubber toric seals are clean and dry. Make sure that all metal surfaces that make contact with the rubber toric seals are clean and dry. Use Tooling (A) in order to install the Duo-Cone seal (1) in the retainer. Put a small amount of clean oil on the metal surfaces that make contact.

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Illustration 2	g00519813

2. Install bearing cone (2) on the spindle.

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Illustration 3	g00519816

3. Lower the temperature of inner bearing cup (3) . Install inner bearing cup (3) in the wheel assembly.

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Illustration 4	g00519817

4. Lower the temperature of outer bearing cup (4) . Install outer bearing cup (4) in the wheel assembly.

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Illustration 5	g00519820

5. Install brake disc (5) with twenty-four bolts and washers. Tighten the bolts to 115 ± 15 N·m (85 ± 11 lb ft) and turn the bolts by an additional two-thirds of a turn.

6. Make sure that the rubber toric seals are clean and dry. Make sure that all metal surfaces that make contact with the rubber toric seals are clean and dry. Use Tooling (A) in order to install the Duo-Cone seal (6) in the retainer. Put a small amount of clean oil on the metal surfaces that make contact.

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Illustration 6	g00519822

7. Install bearing cone (7) on the hub assembly.

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Illustration 7	g00519824

8. Use Tooling (B) and a press in order to install bushing (8) in the hub assembly.

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Illustration 8	g00519825

9. Use Tooling (C) in order to attach a suitable hoist to wheel assembly (9) . Wheel assembly (9) has a weight of 81 kg (179 lb) .

10. Place wheel assembly (9) on the spindle.

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Illustration 9	g00519942

11. Install hub (10) and the bearing cone on the spindle.

12. Install nut (11) that holds assembly (10) on the spindle.

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Illustration 10	g00519827

Note: The centerline of Tooling (D) must be through the centerline of the wheel.

13. Thread a nut fully onto a stud and install Tooling (E) on the nut. The torque wrench must be in line with the center of the wheel. Rotate the wheel several times in order to seat the bearing rollers against the cone back face rib. Tooling (E) will be used in order to check the rolling torque of the wheel.

    When you rotate the wheel, use Tooling (C) in order to tighten adjusting nut (11) to 600 N·m (440 lb ft). This will seat the bearings and this will keep the rollers parallel to each other at the same location on the cone. All wheel rotation must be in the same direction.

    Loosen adjusting nut (11) to a zero reading on the torque wrench. Rotate the wheel for two or more revolutions. Do not loosen adjusting nut (11) too much. Measure the rolling torque due to the drag of the Duo-Cone seals with the torque wrench.

    Note: See Specifications, SENR2907, "Adjustment of Wheel Bearings" in order to obtain the correct torque reading for using another torque wrench.

14. Tighten adjusting nut (11) while rotating the wheel assembly until the rolling torque due to the bearing preload is 5.3 ± 2.0 N·m (47 ± 20 lb in). The rolling torque due to the bearing preload is the difference between the rolling torque that was measured here and the rolling torque due to the Duo-Cone seals that was measured in Step 13 .

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Illustration 11	g00519828

15. Install lock (12) on adjusting nut (11) . Invert the lock if it is necessary. Use the nearest locking position. Loosen adjusting nut (11) or tighten adjusting nut (11) in order to align the holes in the lock with the holes in the hub.

    Check the rolling torque due to the bearing preload. The rolling torque should be 5.3 ± 3.5 N·m (47 ± 31 lb in) .

16. Install the four bolts (13) and the washers that hold the lock.

End By:

1. Install the final drive planet carriers and the ring gears. See Disassembly and Assembly, "Final Drive - Install" .
2. Install the brake caliper assembly. See Disassembly and Assembly, "Service Brakes - Install" .
3. Install the tire and rim. See Disassembly and Assembly, "Tire and Rim - Install" .