789D and 789D XQ Off-Highway Trucks Machine Systems Caterpillar

Removal Procedure

Note: Refer to Operation and Maintenance Manual for the correct tire handling recommendations and tire inflation procedures.

1. Refer to Operation and Maintenance Manual, "Use of Wheel Chocks".
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   Illustration 1	g06305384

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   Typical Example

2. Place Tooling (A) under the front chassis. Refer to Operation and Maintenance Manual, "Jacking Locations" for the correct locations. Use Tooling (A) to lift the front chassis until the weight of the truck is off the front tires and rims. Refer to Tool Operating Manual, NEHS1328, "Lift Group (Stand - 60 Ton)" for more information on Tooling (A).

3. Use Tooling (C) to prevent the front suspension cylinder from extending. Refer to Tool Operating Manual, NEHS1303, "Lift Group (Stand - 25 Ton)" for more information on Tooling (C).
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   Illustration 3	g00625321

4. Use Tooling (B) to remove nuts (1) and the washers that secure tire and rim (2) to the wheel. Leave three flange nuts (3) that secure tire and rim (2) to the wheel.

   Note: Flange nuts (3) are on the three mounting studs which are longer than the other mounting studs. Flange nuts (3) should be left on tire and rim (2) to keep tire and rim (2) on the machine until the tire handler is positioned.

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   Illustration 4	g00625323

5. Position a suitable tire handler to tire and rim (2).

6. Remove three flange nuts (3) that secure tire and rim (2) to the wheel. Remove tire and rim (2) from the wheel. The weight of the tire and rim is approximately 4502 kg (9925 lb).

7. Repeat Steps 4 through 6 for the remaining front tire and rim.

Installation Procedure

1. Install tire and rim (2) in the reverse order of removal.

   1. Tighten nuts (2) and flange nuts (3) to a torque of 1150 ± 150 N·m (849 ± 111 lb ft).