D8T Track-Type Tractor Power Train Track Roller Frame - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Remove the bulldozer.

2. Separate the track.

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Personal injury can result from performing service on the track roller frame. Refer to Special Instruction, SMHS8273 for inspection and removal procedures before performing any service.

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Illustration 1	g01139329

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Illustration 2	g01139330

1. Install Tooling (F), as shown. Tooling (F) will hold the bogies in the correct position.

2. Install Tooling (G) to hold the frame assembly in position.
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   Illustration 3	g01139332

3. Raise the rear of the machine until the track guides are above the track links. Position Tooling (D) under the machine.
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   Illustration 4	g01139335
   For Tooling (E)

4. Position Tooling (E) under the front of the machine. Use Tooling (E) to raise the front of the machine until the track guides are above the track links.
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   Illustration 5	g06386377
   For Tooling (E1)

5. Use Tooling (E1) to raise the rear of the machine until the track guides are above the track links. Refer to Tool Operating Manual, NEHS1303, "Lift Group (Stand - 25 Ton)" for more information on Tooling (E1).
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   Illustration 6	g06386376

6. Raise the front of the machine with Tooling (E1) until the track guides are above the track links.
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   Illustration 7	g01139336

7. Remove plug (1). Drain the oil from the pivot shaft compartment into a suitable container for storage or disposal.

8. Remove plug (2). Drain the oil from the recoil spring and the bearing compartment into a suitable container for storage or disposal.
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   Illustration 8	g01139337

9. Position Tooling (A) under the equalizer bar on the opposite side of the track roller frame. Raise the equalizer bar until a 25 mm (1.0 inch) piece of the bar stock can be installed between the frame and the equalizer bar. Place the bar stock on the side of the track that is being removed. The bar stock keeps the equalizer bar in the original position during the removal of the track roller frame.
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   Illustration 9	g01139341

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   Illustration 10	g01139342

10. Position Tooling (A) under the front track roller frame.

11. Loosen bolts (3). Remove equalizer bar pin (4) from the rear track roller frame.
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    Illustration 11	g01139350

12. Remove bolts (5) from seal retainer (6).

13. Attach a suitable lifting device to trunnion (8). The weight of trunnion (8) is approximately 43 kg (95 lb). Remove bolts (7) and trunnion (8).
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    Illustration 12	g01139363

14. Remove plug (9) and the O-ring seal from plate (10).
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    Illustration 13	g01139374

15. Use Tooling (C) to remove plate (10).
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    Illustration 14	g01139375

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    Illustration 15	g01139341

16. Remove bolts (11), plate (12), and the thrust ring from the shaft.

17. Remove Tooling (A) from the front track roller frame.
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    Illustration 16	g01139379

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    Personal injury or death can result from lifting a heavy assembly. The heavy assembly can fall if using an incorrect hoist to lift the load. Be sure the hoist has the correct capacity to lift a heavy assembly. Approximate weight of the assembly is given below.

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    Pinch Point Stay clear of this area! Serious personal injury may occur.

18. Use a suitable lifting device and Tooling (B) to remove the track roller frame from the machine. Place suitable blocking on the opposite side under track to help support the weight of the tractor and help prevent tipping. The combined weight of the track roller frame and Tooling (B) is approximately 4699 kg (10360 lb).

Installation Procedure

1. Install the track roller frame in the reverse order of removal.
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   Table 2

   Torque Table
   Undercarriage Types	Torque Value
   Suspended Undercarriage	1800 ± 250 N·m (1328 ± 184 lb ft)
   Non-Suspended Undercarriage	1600 ± 200 N·m (1180± 148 lb ft)

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   Illustration 17	g03716022

   1. Tighten bolt (3A) to the torque value listed in Table 2.

   2. Tighten bolt (3B) to the torque value listed in Table 2.

   3. Torque bolt (3A) again to the torque value listed in Table 2.

   4. Torque bolt (3B) again to the torque value listed in Table 2.

   5. Repeat Step 1a through Step 1d on the other side of machine.

   6. Install bolts (7) to a torque of 240 ± 40 N·m (177 ± 30 lb ft).