PIN 9W4192 - Caterpillar

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's 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 (2) is the maximum distance between the string and the grouser.
Illustration 1 g00040329
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 115 10 mm (4.5 0.4 inch).
Illustration 2 g00104000
If the machine is equipped with track carrier rollers, calculate the average of dimension (3) and dimension (4). The correct average value is 55 10 mm (2.2 0.4 inch).Loose Track Adjustment
Illustration 3 g00040335
Do not attempt to tighten track when dimension (1) is 150 mm (5.9 inch) or more.Contact your Caterpillar dealer for track service or instructions.
Remove the access cover.
Illustration 4 g00689385
Add multipurpose grease (MPGM) through track adjustment valve (5). Add the MPGM until dimension (2) 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.
Measure dimension (2) again.
Install the access cover.Tight Track Adjustment
Illustration 5 g00689386
Remove the access cover.
Loosen relief valve (6) 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 (5). Add grease until dimension (2) 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.
Measure dimension (2) again. Repeat Steps 4 and 5 until dimension (2) is correct.
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.