315B Excavator Machine Systems Caterpillar

Assembly Procedure

1. Be sure that all of the parts of the swing drive are thoroughly clean and free of dirt and debris prior to assembly.

2. Check the condition of all of the parts of the swing drive. If any of the parts are worn or damaged, use new parts for replacement.

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Illustration 1	g00363813

3. Install spacer (30), bearing cone (29), spacer (26) and spacer (25) on pinion shaft (28). Install spring pin (27) in the end of the pinion shaft.

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Illustration 2	g00363683

4. Lower the temperature of bearing cups (31) and (32). Install the bearing cups in the swing drive housing. Be sure that the bearing cups are properly seated in the housing.

5. Install drain tube (33) in the swing drive housing.

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Illustration 3	g00363680

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Illustration 4	g00363679

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Illustration 5	g00363678

6. Use the following procedure to install carrier assembly (17) .

   1. Install retainer (24) in the carrier, as shown.

   2. Apply clean SAE 30 oil on bearing (23). Install the bearing in planetary gear (21) .

   3. Install a thrust washer (22) on each side of the planetary gear. Install the planetary gear and thrust washers in the carrier. Install planetary shaft (19) in the carrier and through the planetary gear (21). Be sure that the spring pin hole in the planetary shaft is aligned with the spring pin hole in the carrier.

   4. Install spring pin (20) in the carrier and into the planetary shaft. Install the spring pin until the spring pin is just below the outside surface of the carrier. Install the spring pin with the split in the spring pin toward the top or bottom of the carrier.
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   Illustration 6	g00488013

   5. Make a stake mark on each side of the spring pin hole in the carrier. Stake marks keep the spring pin from falling out. Each stake mark should be approximately 1.5 mm (.06 inch) from the spring pin hole.

   6. Install the other two planetary gears (21) in the carrier. Refer to steps 6.a through 6.e.

   7. Heat bearing cone (18), and install the bearing cone on the carrier, as shown. Be sure that the bearing cone is properly seated against the flange on the carrier.

7. Fasten Tool (B) and a hoist to the swing drive housing. Carefully position the swing drive housing over the pinion shaft.

8. Apply 5P-3931 Anti-Seize Compound on the splines of carrier assembly (17) and the pinion shaft.

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Illustration 7	g00363677

9. Install carrier assembly (17) over the end of the pinion shaft. Be sure that the carrier assembly is completely seated. It may be necessary to use a press to seat the carrier assembly.

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Illustration 8	g00363674

Note: Spacers (25) and (26) control the amount of rolling torque of the pinion shaft.

10. Use the following procedure to determine the correct rolling torque of the pinion shaft.

    1. Temporarily install bolt (12). Tighten the bolt to a torque of 315 ± 20 N·m (230 ± 15 lb ft).

    2. Use bolt (12) to slowly turn the pinion shaft with a suitable torque wrench. Record the reading as the pinion shaft is being turned. The correct rolling torque of the pinion shaft must be 6.03 ± 2.59 N·m (53 ± 23 lb in).

    3. Remove bolt (12), and separate the pinion shaft from the swing drive housing. Change spacers (25) and (26), as required. Change spacers (25) and (26) in order to obtain the correct rolling torque of the pinion shaft.

    4. Reinstall the pinion shaft in the swing drive housing. Apply 9S-3263 Thread Lock Compound on the threads of bolt (12). Install bolt (12). Tighten the bolt to a torque of 315 ± 20 N·m (230 ± 15 lb ft).

11. Install O-ring seal (13) in the swing drive housing.

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Illustration 9	g00363676

12. Apply 5P-3413 Pipe Sealant in the bore of cage (15) in the place for lip type seal (16). Use Tooling (C) to install lip type seal (16) in cage (15). Install the seal until the seal makes contact with the counterbore in the cage. Apply 5P-0960 Molybdenum Grease on the lip of the seal.

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Illustration 10	g00363675

13. Apply 1U-8846 Liquid Gasket on the mating surfaces of cage (15) and the swing drive housing.

14. Put cage (15) in the cage's original position on the swing drive housing. Apply 9S-3263 Thread Lock Compound on the threads of nine bolts (14). Install nine bolts (14) and the washers that hold the cage to the swing drive housing. Tighten the bolts to a torque of 33 ± 3 N·m (24 ± 2 lb ft).

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Illustration 11	g00363672

15. Install ring gear (4) on the swing drive housing in the ring gear's original position. It may be necessary to rotate the ring gear back and forth in order to engage the planetary gears in carrier assembly (17) with the ring gear.

16. Install retaining ring (11) on sun gear (10). Install sun gear (10) in the carrier assembly.

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Illustration 12	g00363574

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Illustration 13	g00363573

17. Use the following procedure to assemble carrier assembly (3) .

    1. Apply clean SAE 30 oil on bearing (9). Install the bearing in planetary gear (7) .

    2. Install spring pin (5) in the carrier and into the planetary shaft.

    3. Install the spring pin until the spring pin is just below the outside surface of the carrier. Install the spring pin with the split in the spring pin toward the top or bottom of the carrier.
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    Illustration 14	g00488013

    4. In order to keep the spring pin from falling out, make a stake mark on each side of the spring pin hole in the carrier. Each stake mark should be approximately 1.5 mm (.06 inch) from the spring pin hole.

    5. Install the other two planetary gears (7) in the carrier. Refer to steps 17.a through 17.d.

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Illustration 15	g00363572

18. Install carrier assembly (3) in ring gear (4). It may be necessary to rotate the carrier assembly back and forth in order to engage the planetary gears in the carrier assembly with the ring gear.

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Illustration 16	g00363532

19. Install sun gear (1) in the carrier assembly. Install O-ring seal (2) in the ring gear.

End By: Install the swing drive. Refer to Disassembly and Assembly, "Swing Drive - Remove and Install" in this manual.