320 VH and VM Variable Gauge Undercarriage Caterpillar

Removal Procedure

Start By:

1. Separate the track assemblies.

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Illustration 1	g02160426

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The spring of the recoil spring assembly is compressed under several tons of force. Do not attempt to compress or release the tension of the spring with the nut on the end of the retaining rod. Damaged threads on the retaining rod or nut can cause the assembly to come apart with force, resulting in injury or death.

1. Use a pry bar and move the front idler (1) and recoil spring (2) partially out of the track roller frame.

2. Attach a suitable lifting device to front idler (1) and recoil spring (2). The weight of front idler (1) and recoil spring (2) is approximately 225 kg (495 lb). Slide front idler (1) and recoil spring (2) out of the track roller frame as one unit.

3. Leave the suitable lifting device attached and turn front idler (1) and recoil spring (2) around 180 degrees. Install front idler (1) partially into the track frame. The front idler (1) and recoil spring (2) will be supported by the track frame.

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Illustration 2	g02160427

4. Attach a suitable lifting device to recoil spring (2). The weight of recoil spring (2) is approximately 116 kg (255 lb). Remove bolts (3) and recoil spring (2) .

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Illustration 3	g02160428

5. Attach a suitable lifting device to front idler (1). The weight of front idler (1) is approximately 109 kg (240 lb). Remove front idler (1) .

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Illustration 4	g02160429

6. Attach a grease gun to the fill valve. Pump grease through the fill valve and into the cylinder in order to remove piston (5) .

7. Remove valve (8) and seal assembly (7) .

8. Remove seal (6) from piston (5) .

9. Remove lip seal (4) .

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Illustration 5	g02160551

10. Remove bolts (11), washers (10), and plate (9) .

Installation Procedure

1. Install the front idler, the recoil spring, and the hydraulic track adjuster in the reverse order of removal.