D6R Track-Type Tractor Track Adjustment - Adjust Caterpillar

Procedure

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Grease is under high pressure. Grease coming out of the relief valve under pressure can penetrate the body causing injury or death. Do not watch the relief valve to see if grease is escaping. Watch the track or track adjustment cylinder to see if the track is being loosened. Loosen the relief valve only one turn.

Follow these steps in order to adjust the tension of the track:

1. Move the machine forward. Allow the machine to stop without the use of the service brakes. Adjust the tracks while you are in the machine's typical operating conditions. If packing conditions prevail in the workplace, adjust the tracks with packing material on the tracks.

2. Make sure that the sag in the track is between the sprocket and the front idler. Park the machine and shut off the engine.

3. Establish a straight line from the grouser at the sprocket to the grouser at the front idler. See Illustration 1.
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   Illustration 1	g00040329

4. If a machine does not have track carrier rollers, the sag in the track is measured between the sprocket and front idler (2). The correct adjustment of dimension (2) is 127 ± 10 mm (5 ± 0.40 inch).
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   Illustration 2	g00104000

5. If the machine is equipped with track carrier rollers, calculate the average of dimension (3) and dimension (4). The correct average value is 65 ± 10 mm (2.5 ± 0.40 inch).

Loose Track Adjustment

Illustration 3	g00040335

1. Remove the access cover.
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   Illustration 4	g00104001

2. Add multipurpose grease (MPGM) through track adjustment valve (5). Add the MPGM until dimension (2) is correct.

3. Operate the machine back and forth in order to equalize the pressure. Allow the machine to coast to a complete stop. Do not use the brakes.

4. Measure dimension (2) again.

5. Install the access cover.

Tight Track Adjustment

Illustration 5	g00104002

1. Remove the access cover.

2. Loosen relief valve (6) by one turn of 360 degrees. Allow the grease to escape.

3. Close the relief valve.

4. Add MPGM through track adjustment valve (5). Add grease until dimension (2) is correct.

5. Operate the machine back and forth in order to equalize the pressure. Allow the machine to coast to a complete stop. Do not use the brakes.

6. Measure dimension (2) again. Repeat Steps 4 and 5 until dimension (2) is correct.

7. Install the access cover.

Bolt Torque for Track Shoes

The torque requirement for track shoe bolts is 400 ± 70 N·m (300 ± 50 lb ft). Tighten the bolts by an additional turn of 120 degrees. If you are using bolts with a master link, tighten the bolts to a torque of 400 ± 70 N·m (300 ± 50 lb ft). Then, tighten the bolts by an additional turn of 180 degrees.