315C Excavator Machine Systems Undercarriage Frame - Install Caterpillar

Installation Procedure

Note: Check the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the components, if necessary.

1. Make sure that the mating surfaces of the upper structure and the undercarriage frame are thoroughly clean and free of dirt and debris.

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Illustration 1	g00365587

2. Install four suitable sized guide bolts (16) in the mounting bolt holes in the upper structure, as shown. Install the guide bolts 90 degrees from each other.

3. Apply Tooling (C) to the mating surface of the swing gear. Apply Tooling (C) on the mating surface of the bearing of the undercarriage frame. Apply Tooling (D) in the hole for the locating dowel in the undercarriage frame.

4. Use a lift truck to position undercarriage frame (15) under the upper structure. Block the undercarriage frame so that the undercarriage frame cannot move.

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NOTICE
Failure to properly assemble parts or failure to follow established procedures can lead to damage of the parts and assembly. To avoid damage to parts, always identify and mark the parts so that they can be installed in the same location. Ensure that gear surfaces align. Never force parts during assembly.

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Illustration 2	g00805481

5. Remove the pins from the tubes of Tooling (B). Use Tooling (B) to lower the upper structure in 13 mm (0.5 inch) increments. Align the guide bolts in the upper structure with the bolt holes in the undercarriage frame. Move the undercarriage frame in order to obtain the correct alignment.

6. As the upper structure is being lowered, check that the pinion shaft aligns with the swing gear and bearing. Check that the dowel in the upper structure aligns with the dowel hole in the swing gear and bearing.

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Illustration 3	g00365267

7. Apply Tooling (E) to the threads of bolts (13) that hold the upper structure to the undercarriage frame. Install bolts (13) and tighten bolts (13) to a torque of 570 ± 60 N·m (420 ± 44 lb ft).

8. Connect tube assembly (12) to the fitting on the front of the upper structure.

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Illustration 4	g01021420

9. Install clamp (10) over the boot of the swivel. Install hose fittings (11) and lock bolt (9) in the swivel.

10. Install hose fittings (8) in the swivel.

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Illustration 5	g00365264

11. Connect four hose assemblies (7) .

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Illustration 6	g00365075

12. Remove Tooling (A) from the machine.

13. Start the machine and raise the boom. Remove Tooling (B) from the stick.

14. Install right hand boom cylinder (6). Refer to Disassembly and Assembly, "Boom Cylinder - Install".

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Illustration 7	g00365260

15. Remove Tooling (B) from the rear of the machine.

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Illustration 8	g01021419

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Illustration 9	g00364733

16. Remove cover (3) and thrust plate (4) from each final drive.

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Illustration 10	g00364741

17. Install sun gear (5) in each final drive.

18. Make sure that the machined surface of the ring gear in the final drive is thoroughly clean, free of dirt and debris and dry. Make sure that the machined surface of cover (3) is thoroughly clean, free of dirt and debris and dry. Apply Tooling (C) around the machined surface of the ring gear. Put cover (3) in the cover's original position on the ring gear.

19. Apply Tooling (E) on the threads of bolts (1) that hold cover (2) in position. Install bolts (1) and the washers that hold the cover. Tighten bolts (1) to a torque of 29 ± 2 N·m (21 ± 1 lb ft).

20. Fill each final drive with oil to the correct level. Fill the hydraulic oil tank with oil to the correct level. Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities".

End By: Install the bucket. Refer to Disassembly and Assembly, "Bucket - Install".