D7R Track-Type TractorPower Train Caterpillar

Assembly Procedure

ReferenceSee the procedure in Disassembly and Assembly, "Duo-Cone Conventional Seals - Install" in this module before you assemble the track rollers.

1. Clean the components. Inspect the components for wear and for damage. Replace any components that are worn or damaged.

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Illustration 1	g00591627

2. Install O-ring (9) on bushing (10) .

3. Use Tooling (B) in order to install Duo-Cone seal (11) in bushing (10) .

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Illustration 2	g00591625

4. Apply SAE 30W oil to O-ring seals (8). Install O-ring seals (8) on track roller shaft (7) .

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Illustration 3	g00591739

5. Apply SAE 30W oil to the bore of roller (6). Also, lubricate the surface and the seal of bushing (10). Use a hydraulic press and Tooling (C) in order to install bushing (10) in roller (6). Bushing (10) should just clear the retaining groove in roller (6) .

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Illustration 4	g00830792

6. Use Tooling (A) in order to install retaining ring (5) in roller (6) .

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Illustration 5	g00591738

Note: The bushing in roller (6) can be damaged when shaft (7) is installed in roller (6) .

7. Rotate the track roller by 180 degrees. Install track roller shaft (7) in roller (6). Position shaft (7) carefully.

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Illustration 6	g00591739

8. Apply SAE 30W oil to the bore of roller (6). Also, lubricate the surface and the seal of bushing (10). Use a hydraulic press and Tooling (C) in order to install remaining bushing (10) in roller (6). Bushing (10) should just clear the retaining groove in roller (6) .

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Illustration 7	g00591741

9. Use Tooling (A) in order to install retaining ring (5) in roller (6) .

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Illustration 8	g00591622

10. Rotate the track roller by 180 degrees. Use a hydraulic press against track roller shaft (7) in order to move opposite bushing (10) against retaining ring (5) .

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Illustration 9	g00591620

11. Use Tooling (B) in order to install Duo-Cone seal (4) in end collar (1) .

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Illustration 10	g00591742

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Illustration 11	g00822353

12. Install end collar (1) on track roller shaft (7), and install lock ring (3) on track roller shaft (7) .

13. Repeat Steps 11 and 12 in order to install remaining end collar (1) on the opposite end of track roller shaft (7) .

14. Use Tooling (D) in order to pressure test the track roller by performing the following steps:

    1. Use dry air in order to pressurize the track roller to 280 kPa (41 psi).

    2. Observe the pressure reading of the track roller. The pressure should remain constant for ten seconds. A reduction in pressure in ten seconds or less indicates a leak in the track roller. If the reading indicates that a leak exists, disassemble the track roller. Inspect the seals on the track roller.

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Illustration 12	g00827043
Typical Example

15. Use Tooling (E) in order to check the end play of shaft (7). The correct end play is 0.79 ± 0.54 mm (0.0311 ± 0.0213 inch).

16. Fill the track roller with 410 ± 25 mL (13.9 ± 0.8 oz) of SAE 30W oil. The track roller should be filled through the opening in shaft (7) for the plug and for stopper (2) .

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Illustration 13	g00591745
Typical Example

17. Apply clean oil to new stopper (2). Install stopper (2) in the end of shaft (7). The outside face of stopper (2) should be 7 ± 7 mm (0.275 ± 0.275 inch) below the chamfer of shaft (7) .

18. Use Tooling (F) in order to install the plug in stopper (2). The outside surface must be even with the outside surface of the stopper.

End By: Install the track roller in the track roller frame. See the procedure in Disassembly and Assembly, "Track Roller - Install" in this module.