TK741, TK751 and TK752 Track Feller Bunchers Machine Systems Caterpillar

Assembly Procedure

1. Make 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 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	g00518616

3. Apply Tooling (D) on the outside diameter of bearing (31). Also, apply Tooling (D) on the inside diameter of the bearing seat that is in swing drive housing (25). Install bearing (31) in the swing drive housing. It may be necessary to use a hammer and a punch to seat the bearing properly.

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Illustration 2	g00518838

4. Install lip seals (30) in cage (24), as shown. Refer to Illustration 2. Apply Tooling (E) on the lips of the seals.

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Illustration 3	g00519306

Note: Do not damage lip seals (30) when cage (24) is installed over pinion shaft (28) .

5. Lower the temperature of pinion shaft (28). Carefully install cage (24) over the pinion shaft. Use a suitable press to install bearing (29) on the pinion shaft. Install spacer (27) on pinion shaft (28) .

6. Apply Tooling (D) on the outside diameter of bearing (29). Also, apply Tooling (D) on the inside diameter of the bearing seat that is in swing drive housing (25) .

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Illustration 4	g00518841

7. Place swing drive housing (25) in a suitable press, as shown. Install pinion shaft (28), cage (24), bearing (29) and spacer (27) as a unit in the swing drive housing. Make sure that the alignment marks that were made on the cage and on the swing drive housing are in alignment.

8. Apply Tooling (F) on the threads of the bolts that secure cage (24) to swing drive housing (25). Install the bolts. Tighten the bolts evenly to the standard torque value.

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Illustration 5	g00518842

9. Turn the swing drive housing with the pinion shaft upside-down. Position the unit in a press. Support the unit on the end of the pinion shaft.

10. Lower the temperature of inner bearing race (26), which is not shown. Install the inner bearing race over the pinion shaft and into bearing (31). Use a suitable sleeve and a press in order to seat the inner bearing race.

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Illustration 6	g00518589

11. Use Tooling (C) to install retaining ring (22) .

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Illustration 7	g00518581

12. Use two people to install ring gear (21) on the swing drive housing in the ring gear's original position.

13. Use the following procedure to assemble carrier assembly (13) .
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    Illustration 8	g00518555

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    Illustration 9	g00518553

    1. Apply clean SAE 30 oil on bearings (19). Install bearings (19) in planetary gear (18) .

    2. Install a thrust washer (20) on each side of the planetary gear. Install the planetary gear and thrust washers in the carrier. Install planetary shaft (17) in the carrier assembly and through planetary gear (18). Make sure that the spring pin hole in the planetary shaft is aligned with the spring pin hole in the carrier.

    3. Install spring pin (16) in the carrier assembly and into the planetary shaft. Install the spring pin until the spring pin is even with the outside surface of the carrier assembly. Align the split in spring pin (16) to the top or the bottom.
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    Illustration 10	g00903073

    4. Make a stake mark on each side of the spring pin hole in the carrier assembly. This will prevent the spring pin from falling out of the spring pin hole. Each stake mark should be approximately 1.5 mm (0.06 inch) from the outside diameter of the spring pin hole.

    5. Repeat Steps 13.a through 13.d in order to install the other three planetary gears (18) in the carrier assembly.

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Illustration 11	g00518552

14. Install carrier assembly (13) in ring gear (21). Slide a piece of steel bar stock between the planetary gears in carrier assembly (13), as shown. Make sure that the steel bar stock is centered in the carrier assembly. Fasten Tooling (B) and a suitable lifting device to the steel bar stock, as shown. Carefully, lower the carrier assembly into position in the ring gear. It may be necessary to move the carrier assembly back and forth during installation in order to ensure that all gears align and all gears mesh properly.

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Illustration 12	g00518551

15. Install retaining ring (15) that secures carrier assembly (13) in position.

16. Install spacer (14) on the end of the pinion shaft.

17. Use the following procedure to assemble carrier assembly (3) .
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    Illustration 13	g00518549

    1. Install retaining ring (12) in gear (11) .
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    Illustration 14	g00518543

    2. Place gear (11) in the carrier assembly. Install retaining ring (10) with a screwdriver.
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    Illustration 15	g00518400

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    Illustration 16	g00518398

    3. Apply clean SAE 30 oil on bearing (8). Install the bearing in planetary gear (7) .

    4. Install a thrust washer (9) on each side of the planetary gear. Install the planetary gear and thrust washers in the carrier assembly. Install planetary shaft (5) in the carrier assembly and through planetary gear (7). Make sure that the spring pin hole in planetary shaft (5) is aligned with the spring pin hole in the carrier assembly.

    5. Install spring pin (6) in the carrier assembly and into the planetary shaft. Install the spring pin until the spring pin is even with the outside surface of the carrier assembly. Align the split in spring pin (6) to the top or to the bottom.
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    Illustration 17	g00903073

    6. Make a stake mark on each side of the spring pin hole in the carrier assembly. This will prevent the spring pin from falling out of the spring pin hole. Each stake mark should be approximately 1.5 mm (0.06 inch) from the outside diameter of the spring pin hole.

    7. Repeat Steps 17.a through 17.f in order to install the other three planetary gears in the carrier.

    8. Install sun gear (4) in carrier assembly (3) .

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Illustration 18	g00518397

18. Use two people in order to install carrier assembly (3) in the ring gear of the swing drive.

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Illustration 19	g00518372

19. Apply Tooling (G) on the flange surfaces of ring gear (21) .

20. Fasten Tooling (A) and a suitable lifting device to cover (2), as shown. Place the cover in the cover's original position on ring gear (21) .

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Illustration 20	g00518369

21. Apply Tooling (F) on the threads of bolts (1). Install bolts (1) and the washers that secure cover (2). Tighten bolts (1) to a torque of 270 ± 40 N·m (200 ± 30 lb ft).

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