CIPI UNDERCARRIAGE Arrangements: 9Q-5195, 9Q-5197, 9Q-5198, 9Q-5232, 9Q-5504, 9Q-5643, 9Q-5651, 9Q-5727, 9Q-5728, 9Q-5729, 9Q-5730, 9Q-5731, 9Q-5747, 9Q-5876, 180-4029, and 213-3892 Caterpillar

Assembly Procedure

Note: Refer to Guideline for Reusable Parts and Salvage Operations, SEBF8568, "Hydraulic Excavator Roller Disassembly and Assembly Procedures Guide" for additional information on reconditioning.

Note: The procedure to assemble the single flange track roller is identical to the double flange track roller.

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Illustration 1	g00738148

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

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Illustration 2	g00738166

Note: Do not reuse bearings (6) and (12). Use new parts for replacement.

2. Lower the temperature of bearings (6) and (12), and install one in each end of the track roller with a press.

3. Install the bearings until the bearings contact the counterbore in the track roller.

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

   Note: Do not install the Duo-Cone seals in the track roller or end collars at this time.

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   Illustration 3	g00738163

   Note: Replace the two O-ring seals that are used on shaft (15) with new O-ring seals.

   1. Install a new O-ring seal (16) on shaft (15). Lubricate the O-ring seal with clean oil.
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   Illustration 4	g00738164

   2. Lubricate the bore in end collar (5) with clean oil.

   3. Use a press to install shaft (15) in end collar (5). Make sure that the spring pin hole in the shaft is aligned with the spring pin hole in the end collar.

   4. Install spring pin (4) in the end collar and the shaft.

   5. Install the spring pin with the split facing toward the shaft. The split in the shaft must not be more than 20 degrees on either side of a centerline that runs through the center of the shaft.
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   Illustration 5	g00738160

   6. Install shaft (15) in track roller (9) without the Duo-Cone seals.

   7. Install end collar (1) without the Duo-Cone seals. Install snap ring (10) .

   8. Use Tooling (B) to measure the end play of shaft (15) .

   9. The end play of the shaft must be 0.25 mm (.010 inch) to 1.25 mm (.049 inch). Bearings (6) and (12) control the amount of shaft end play.

   10. Disassemble the track roller, but do not remove shaft (15) from end collar (5) .

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Illustration 6	g00738165

Note: The rubber seals and all surfaces that contact 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 Duo-Cone Seals, refer to Disassembly and Assembly, "Duo-Cone Conventional Seals - Install" in this manual.

5. Install Duo-Cone seals (2) and (8) in each end of the track roller with Tooling (A) .

6. Install Duo-Cone seal (3) in end collar (5) with Tooling (A) .

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Illustration 7	g00738161

7. Install Duo-Cone seal (7) in end collar (1) with Tooling (A) .

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Illustration 8	g00738163

Note: Do not damage the Duo-Cone seals during the installation of the shaft in the track roller. Do not damage the Duo-Cone seals during the installation of end collar (1) .

8. Install shaft (15) with end collar (5) in track roller (9) .

9. Install O-ring seal (11) in the groove on the end of shaft (15). Lubricate the O-ring seal with clean oil.

10. Lubricate the bore in end collar (1) with clean oil.

11. Put the track roller in a press. Install end collar (1) on the end of shaft (15) .

12. Push down on end collar (1) with the press, and install snap ring (10) .

13. Install a new stopper (13) in the end of shaft (15) .

14. Install the stopper until the stopper is even with the end of the chamfer or until the stopper is 7 ± 7 mm (0.28 ± 0.28 inch) below the end of the chamfer in the end of the shaft.

15. Check the track roller for air leaks.

16. Use Tooling (C) to apply 138 kPa (20 psi) of air pressure to the roller for a minimum of thirty seconds.

17. Make sure that the cavity is sealed and that the air pressure is observed for ten seconds. A pressure drop of 3.5 kPa (0.5 psi) or less is acceptable.

    Note: Do not apply the air in a large surge. Do not exceed 138 kPa (20 psi) as this may damage the seals.

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Illustration 9	g00738159

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

    1. For Type "A" excavators, the capacity of the track roller is approximately 280 ± 15 mL (9.52 ± 0.51 oz).

    2. For Type "B" excavators, the capacity of the track roller is approximately 240 ± 15 mL (8.16 ± 0.51 oz).

19. Install a new plug (14) in the stopper in the end of the track roller.

20. Install the plug until the plug is protruding 0 mm (0.0 inch) to 5 mm (0.20 inch) above the end of the stopper or until the plug is flush with the end of the stopper.

21. Make sure that the plug is not recessed below the surface of the stopper after the plug is installed.

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