BRACKET 1246273 - Caterpillar

Illustration 1 g01478514Check
Check the track adjustment. Check for wear and for excessive dirt buildup.If tracks are too tight, wear of the components will accelerate. If tracks are too loose, wear of the components will accelerate.
Move the machine forward for a distance of two times the length of the machine. Allow the machine to stop without the use of the service brake. Shut off the engine.
Stand on the track between the front idler and the track carrier roller in order to produce as much track sag as possible.
Illustration 2 g01226575
Dimension (1) is the average of dimension (2) and (3).
Dimension (1) is 35 6 mm (1.4 0.24 inch).
Measure the track sag in two places on each track.
Place a tight string or a straight edge on top of the grousers between the carrier roller and front idler. Measure the distance from the straight edge to the grouser tip at the lowest point of sag.
Place a tight string or a straight edge on top of the grousers between the carrier roller and sprocket. Measure the distance from the straight edge to the grouser tip at the lowest point of sag.
Total the two measurements. Refer to Illustration 2 in order to determine the correct sag.
If this dimension is not correct, adjust the track. Track Adjustment
Do not remove any parts until all pressure has been relieved to avoid possible personal injury. Relieve pressure by opening relief valve one turn maximum. See maintenance guide for track adjustment procedure.
Loose Track Adjustment
Illustration 3 g02646100
Open the Valve cover.
Illustration 4 g02646192
Add MPGM through the track adjustment valve. Add MPGM until dimension (1) is correct.
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 brake.
Remeasure dimension (1) or dimension (A) and dimension (B), as needed. Reference: See Operation and Maintenance Manual, "Front Idler Position - Check" for additional information on the SALT undercarriage.Tight Track Adjustment
Open the Valve cover.
Illustration 5 g02646232
Rotate the valve counterclockwise in order to allow the grease to escape.
Close the relief valve when dimension (1) or dimension (A) and dimension (B) is correct.