325, 325B and 325L Excavators Caterpillar

Assembly Procedure For The Track Carrier Roller On CIPI Undercarriage Arrangements Which Are Based On 325 and 325B Track Type Excavators

Note: For additional information on the assembly of track carrier rollers, refer to Undercarriage Reconditioning Bulletin, SEBF8599.

1. Thoroughly clean all of the parts of the track carrier roller prior to assembly.

Note: Do not reuse bearings (12) and (13). Use new parts for replacement.

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Illustration 1	g00367312

Note: Bearing (13) is a straight bearing.

2. Lower the temperature of bearing (13) .

3. Use Tooling (A) and a press to install bearing (13) in the inside bore of the track carrier roller.

4. Install the bearing until the bearing is even with the shaft counterbore in the track carrier roller.

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Illustration 2	g00489523

Note: Bearing (12) has a flange.

5. Lower the temperature of bearing (12) .

6. Use Tooling (A) and a press to install bearing (12) in the outside bore of the track carrier roller. The outside bore can be identified by three threaded holes "H" in the track carrier roller.

7. Install the bearing until the flange on the bearing contacts the counterbore in the track carrier roller.

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Illustration 3	g00489522

8. Check the condition of the O-ring seal that is used in collar (11). If the O-ring seal is damaged, use a new part for replacement. Install the O-ring seal in the collar. Apply clean oil on the O-ring seal.

9. Use a press to install collar (11) on shaft (8) .

   1. For track carrier rollers on CIPI undercarriage arrangements which are based on 325 track type excavators, install collar (11) until dimension "X" is 132.4 ± 0.20 mm (5.21 ± .008 inch).

   2. For track carrier rollers on CIPI undercarriage arrangements which are based on 325B track type excavators, install collar (11) until dimension "X" is 129.2 ± 0.20 mm (5.09 ± 0.008 inch).

10. Use the following procedure to determine shaft end play.

    Note: Do not install the Duo-Cone seals in the track carrier roller or collar (11) at this time.

    1. Install shaft assembly (8) in the track carrier roller without Duo-Cone seals.

    2. Install retainer (7) and socket head bolts (6) on the end of shaft assembly (8) .

    3. Use Tool (C) to measure the end play of shaft assembly (8). For track carrier rollers on CIPI undercarriage arrangements which are based on 325 track type excavators, the end play of the shaft assembly must be 0.25 mm (.010 inch) to 1.25 mm (.049 inch). For track carrier rollers on CIPI undercarriage arrangements which are based on 325B track type excavators, the end play of the shaft assembly must be 0.20 mm (0.008 inch) to 0.75 mm (0.030 inch). Bearing (12) controls the amount of shaft end play.

    4. Disassemble the track carrier roller, but do not remove collar (11) from shaft (8) .

Note: The rubber seals and all surfaces that make contact with the seals must be clean and dry. After installation of the seals, apply clean SAE 30 oil on the contact surfaces of the metal seals. For more information concerning the assembly and installation of Conventional Duo-Cone Seals, refer to Disassembly and Assembly, "Duo-Cone Conventional Seals - Install" in this manual.

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Illustration 4	g00489499

11. Install Duo-Cone seal (10) in collar (11) with Tooling (B) .

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Illustration 5	g00489497

12. Install Duo-Cone seal (9) in the track carrier roller on the side without the three threaded holes with Tooling (B) .

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Illustration 6	g00489493

13. Carefully install shaft assembly (8) in the track carrier roller.

14. Install retainer (7) and two socket head bolts (6) .

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Illustration 7	g00489486

15. Install washer (5), as shown.

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Illustration 8	g00489481

16. Check the condition of O-ring seal (4) that is used on cover (3). If the O-ring seal is damaged, use a new part for replacement. Apply clean oil on O-ring seal (4). Install the O-ring seal on cover (3) .

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Illustration 9	g00489477

17. Install cover (3) on the track carrier roller and three socket head bolts (1) .

Note: There are two types of track carrier rollers: The track carrier rollers are welded or the track carrier rollers are cast. The track carrier rollers that are welded will have a weld bead. The track carrier rollers that are cast will have no welds.

18. Put the track carrier roller in a vertical position. Fill the track carrier roller with clean SAE 30 oil.

    1. For track carrier rollers on CIPI undercarriage arrangements which are based on 325 track type excavators, the capacity of the welded track carrier roller is 180 ± 10 mL (6.12 ± 0.34 oz).

    2. For track carrier rollers on CIPI undercarriage arrangements which are based on 325B track type excavators, the capacity of the welded track carrier roller is 120 ± 5 mL (4.08 ± 0.17 oz). The capacity of the cast track carrier roller is 85 ± 5 mL (2.89 ± 0.17 oz).

19. Apply a thin coat of 5P-3413 Pipe Sealant on the threads of plug (2) .

20. Install plug (2) .

End By: Install the track carrier rollers. Refer to Disassembly and Assembly, "Track Carrier Roller - Install" in this manual.