315B Excavator Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the front idler, the recoil spring and the hydraulic track adjuster as a unit. Refer to Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove and Install" in this manual.

1. Thoroughly clean the outside of the front idler prior to disassembly.

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NOTICE
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates.

2. Remove the fill/drain plug from the front idler. Drain the oil from the idler into a suitable container for disposal. The capacity of the idler is 180 mL (6.12 oz).

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Illustration 1	g00483026

3. Put the front idler on one side, as shown. The weight of the front idler is 109 kg (240 lb).

4. Remove two spring pins (1) from bearings (2). Fasten a hoist to two bearings (2). Remove the bearings from the shaft of the front idler. The weight of each bearing is approximately 18 kg (40 lb).

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Illustration 2	g00483027

5. Remove Duo-cone seal kits (3) from bearings (2) .

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Illustration 3	g00483028

6. Remove shaft (5) from the front idler.

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Illustration 4	g00483029

7. Remove two O-ring seals (4) from shaft (5) .

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Illustration 5	g00483030

8. Remove Duo-cone seal kit (6) from each side of the front idler.

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Illustration 6	g00483031

9. Remove bushings (7) from each side of the idler.