CYLINDER BLOCK GP 8N9312 - Caterpillar

Illustration 1 g02717440Check the track adjustment. Check the track for wear and for excessive dirt buildup.
Personal injury or death can result from grease under 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 one turn only.If track does not loosen, close the relief valve and contact your Caterpillar dealer.
Move the machine forward. Allow the machine to coast to a stop without the use of the service brakes. Adjust the tracks while you are in the machine typical operating conditions. If packing conditions prevail on the workplace, the tracks should be adjusted without removing the packed material.
To measure the sag in the track, stretch a string over the grousers that are between the sprocket and the front idler. Take the measurement from the string to the top of the grouser at the maximum measurement. Dimension (A) is the maximum distance between the string and the grouser.
Illustration 2 g02381277The machine is equipped with a carrier roller. Calculate the average of dimension (A) and dimension (B). The correct average value is 55 10 mm (2.2 0.4 inch).Loose Track Adjustment
Illustration 3 g02370696
Do not attempt to tighten track when dimension (C) is 150 mm (5.9 inch) or more.Contact your Caterpillar dealer for track service or instructions.
Remove the access cover.
Illustration 4 g02026780
Add multipurpose grease (MPGM) through track adjustment valve (1). Add the MPGM until dimension (A, B) 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 brakes.
Remeasure dimension (C). Reference: See Operation and Maintenance Manual, "Front Idler Position - Check" for additional information on System One Undercarriage.Tight Track Adjustment
Loosen relief valve (2) by one turn of 360 degrees. Allow the grease to escape.
Close the relief valve. Tighten the valve to a torque of 34 7 N m (25 5 lb ft).
Add MPGM through track adjustment valve (1). Add grease until dimension (A, B, C) is correct.
Install the access cover. Bolt Torque for Track Shoes
SystemOne Undercarriage
The track shoe bolts are 22.0 mm (0.87 inch). The torque requirement for track shoe bolts is 500 70 N m (370 50 lb ft). Tighten the bolts by an additional turn of 120 degrees. If you are using bolts with a master link, tighten the master bolts to a torque of 500 70 N m (370 50 lb ft). Then, turn each bolt by an additional turn of 180 degrees.