315B Excavator Machine Systems Caterpillar

Removal Procedure

Start By:

1. Remove the undercarriage frame. Refer to Disassembly and Assembly, "Undercarriage Frame - Remove" in this manual.

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Illustration 1	g00365812

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Illustration 2	g00365813

1. Put an alignment mark on the swing gear and bearing and the undercarriage frame for assembly purposes. Remove thirty bolts (2) and the spacers that hold swing gear and bearing (1) to the undercarriage frame.

2. Fasten Tool (A) and a hoist to the swing gear and bearing, as shown. The bolts and spacers that hold the upper structure to the undercarriage frame can be used to install Tool (A) .

3. Remove the swing gear and bearing. The weight of the swing gear and bearing is approximately 227 kg (500 lb).

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Illustration 3	g00365832
Typical example

4. Put tape over the sealing surfaces of the dust seals, the inner race and the outer race. The tape will prevent the cleaning solvent from entering the cross section of the dust seals. Thoroughly clean the swing gear and bearing.

5. Remove dust seals (3) and (4) from the outer race and the inner race of the swing gear and bearing.

6. Clean the sealing grooves of the inner race and the outer race with a fine grit sandpaper. Use a cleaning solvent to clean the seal grooves. Be sure that the seal grooves are thoroughly clean and dry prior to installing new dust seals.

Installation Procedure

1. Lay a new dust seal (3) around the outer race in order to determine the length that is required. Cut the new seal approximately 10 mm (.4 inch) shorter than the length that is required. Cut the seal at an angle of 90 degrees. Use a file to smoothen the cross section cut of the seal.

2. Use 8T-9021 Adhesive to install new dust seal (3) in the outer race. Be sure that the adhesive is applied to the 90 degree cross section cut. Install the seal, as shown.

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Illustration 4	g00365832

3. Install a new dust seal (4) in the inner race. Follow the procedure in Steps 1 and 2.

4. Lubricate the swing gear and bearing with clean grease.

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Illustration 5	g00365813

5. Clean the mating surface for the swing gear and bearing on the undercarriage frame. Apply 1U-8846 Liquid Gasket on the mating surface. Fasten tool (A) and a hoist to swing gear and bearing (1). Place the swing gear and bearing in position on the undercarriage frame.

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Illustration 6	g00365852

6. Be sure that the stamp "S" is positioned on the inner race, as shown.

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Illustration 7	g00365812

7. Apply 5P-3931 Anti-Seize Compound on the threads of thirty bolts (2). Install the spacers and bolts (2) that hold the swing gear and bearing to the undercarriage frame. Tighten the bolts to a torque of 570 ± 60 N·m (420 ± 44 lb ft).

Note: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the correct filling procedure and the correct levels for the hydraulic oil system.

8. Apply 5P-0960 Molybdenum Grease to the swing gear and bearing.

End By: Install the undercarriage frame. Refer to Disassembly and Assembly, "Undercarriage Frame - Install" in this manual.