PIN 0103419 - Caterpillar

Use this procedure to check for proper clutch assembly.1. Position the assembled clutch group with the shaft in the vertical position and the end plate of the clutch to be measured facing upward.2. Make sure end plate (2) is free.3. Position the tip of a dial indicator on end plate (2) and zero the indicator.
Personal injury can result from applying air pressure without lock ring securely in place. Make sure lock ring (3) is securely in place before applying air pressure to clutch pack.
4. Apply approximately 140 kPa (20 psi) air pressure to appropriate passage (1) in the shaft for the clutch being checked.5. End plate (2) should move and contact lock ring (3). With the end plate contacting lock ring (3), determine the distance the end plate has moved from the dial indicator. This is the clutch pack running clearance. Verifying that running clearances on used clutch packs are within specification does not necessarily mean that one or two discs are not badly worn. The most effective way to measure for clutch wear is to disassemble the clutch pack and individually measure each disc for wear.