994D Wheel Loader Power Train Caterpillar

Illustration 1	g00740272

Note: Apply 7M-7260 Gasket Material on the seal bore surface which is in the case. Allow the gasket material to dry before installing the seal. Make sure that the gasket material is not applied to the lip seal. Lubricate the lip seal with a minimal amount of the lubricant which is being sealed.

Place the pump drive housing in the horizontal position for the following procedures.

Procedure for seating the bearings and adjusting the end play

1. Assemble the following components: the bearings, shaft (4), gear (1), gear (8), gear (9) and gear (10) .

2. Remove the seal from bearing cages (3), (7), (12), and (13). Install bearing cages (3), (7), (12), and (13) .

3. Torque four bolts (2) in bearing cages (3) and (7) to 34 N·m (25 lb ft).

   Torque four bolts (2) in bearing cages (12) and (13) to 34 N·m (25 lb ft).

   Note: Torque the bolts in an alternating sequence and repeat until all of the bolts are at the recommended torque.

4. Rotate the output shaft at least one revolution.

5. Repeat Step 3 for a torque of 68 N·m (50 lb ft).

6. Rotate the output shaft at least one revolution.

7. Repeat Step 5 and Step 6 until all of the bolts are at a torque of 68 N·m (50 lb ft).

8. Loosen the bolts. Rotate the components in order to be certain that the components have end play.

9. Torque four equally spaced bolts (2) in bearing cages (3) and (7) to 3.4 N·m (30 lb in). Torque four equally spaced bolts (2) in bearing cages (12) and (13) to 2.3 N·m (20 lb in).

   Note: Torque the bolts in an alternating sequence and repeat until all of the bolts are at the recommended torque.

10. Rotate the output shaft at least three revolutions.

11. Repeat Step 9 for the following torques: Torque four equally spaced bolts (2) in bearing cages (3) and (7) to 3.4 N·m (30 lb in). Torque four equally spaced bolts (2) in bearing cages (12) and (13) to 2.3 N·m (20 lb in).

12. Rotate the output shaft at least three revolutions.

13. Repeat Step 11 and Step 12 until the torque does not change.

14. Measure the gap between the bearing cage and the bearing housing at two points with a standard feeler gauge. The points should be at 180 degree intervals on bearing cages (3), (7), (12), and (13). Average the two measurements.

15. Install shims with the following thicknesses:

    Note: Add the average thickness from Step 14 to the following values.

    gap (6) for bearing cage (7) ... 0.15 mm (.006 inch)

    gap (11) for bearing cage (12) ... 0.25 mm (.010 inch)

    gap (14) for bearing cage (13) ... 0.25 mm (.010 inch)

    gap (5) for bearing cage (3) ... 0.28 mm (.011 inch)

16. Measure the end play for the output shafts. The end play for the output shafts should be 0.12 ± 0.05 mm (.005 ± .002 inch).

17. Install the seals in bearing cages (3), (7), (12), and (13) .

    Reference: For additional information on adjusting the rear pump drive, refer to the Service Manual module Disassembly and Assembly, RENR2034, "Power Train", "Pump Drive (Rear) - Assemble".