320D2 GC Excavator Machine Systems Front Idler and Recoil Spring - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Separate the track assemblies.

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Illustration 1	g00708892

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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 the recoil spring partially out of the track roller frame. Attach a suitable lifting device to front idler (1), as shown.
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   Illustration 2	g00708894

2. Once front idler (1) and the recoil spring (2) is partially out of the track frame reposition the suitable lifting device in order to support recoil spring (2) and front idler (1).

3. Slide front idler (1) and recoil spring (2) out of the track roller frame as one unit. The weight of front idler (1) and recoil spring (2) is approximately 213 kg (470 lb).

4. Leave the suitable lifting device attached and turn the front idler and recoil spring (2) around 180 degrees.
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   Illustration 3	g01206689

5. Install the front idler partially into the track frame. The front idler and recoil spring (2) will be supported by the track frame.

6. Reposition the suitable lifting device in order to support recoil spring (2).

7. Remove bolts (3).

8. Separate recoil spring (2) from the front idler. The front idler will be supported by the track frame.

9. The weight of the recoil spring (2) is approximately 100 kg (220 lb).
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   Illustration 4	g00708896

10. Attach a suitable lifting device to front idler (1). The weight of front idler (1) is approximately 113 kg (250 lb).

11. Remove front idler (1) from the track roller frame.

Installation Procedure

1. Be sure that the mating surfaces on the front support for the recoil spring are clean and free of dirt and debris prior to assembly. Be sure that the mating surfaces on the two bearings for the front idler are clean and free of dirt and debris prior to assembly.
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   Illustration 5	g00708896

2. Attach a suitable lifting device to the front idler (1). The weight of front idler (1) is approximately 109 kg (240 lb). Install front idler (1) in the track roller frame.
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   Illustration 6	g01206689

3. Attach a suitable lifting device to recoil spring (2). The weight of recoil spring (2) is approximately 100 kg (220 lb). Position the recoil spring (2) and install bolts (3).
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   Illustration 7	g00708894

4. Fasten a suitable lifting device to front idler (1) and recoil spring (2). The combined weight of the front idler (1) and recoil spring (2) is approximately 213 kg (470 lb).

5. Turn the front idler and the recoil spring around 180 degrees.

6. Slide the front idler (1) and recoil spring (2) partially into the track roller frame.
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   Illustration 8	g00708958

7. Remove the suitable lifting device from the recoil spring. Keep the suitable lifting device around front idler (1).

8. Use a pry bar in order to slide front idler (1) into the final position inside the track roller frame.

End By:

1. Connect the track assemblies.