1985/09/23 Caterpillar

All Track-Type Tractors So Equipped

Reference: Service Magazine, Special Edition, April 11, 1983, Disassembly And Assembly Of Track Links On D8L, D9L And D10 Tractors.

When a wet turn is to be performed, use the following procedure to insure correct orientation of the pin and bushing.

NOTE: Before disassembly of the track assembly, use a paint stick and mark the pin (hole end) and bushing. This must be done so the pin and bushing can be reinstalled with correct orientation during track assembly. For more information, see Undercarriage Reconditioning Bulletin, "Shop Repair Procedure For Track Links With Positive Pin Retention", Form SEBF8546.

Illustration 1. Install bushings that do not need turning with the paint mark in the original position.

1. Determine if the bushing needs to be turned to expose a new wear surface. If the bushing does not need to be turned, install the bushing with the paint mark in the original position. See Illustration 1.

2. Always install the track pin with the crosshole towards the wear surface of the track links. The crosshole should be down as the track is assembled in the track press. See Illustration 2. This position puts minimum stress on the crosshole area.

Illustration 2. Before and after positions of paint marks for bushings that need to be turned.

3. If the bushing needs to be turned to expose a new wear surface, do the following. Turn the pin and bushing end for end and rotate the bushing 180°, as shown in Illustration 2.

The wear groove on the bushing is set off-center from the middle of the bushing. This is caused by clearance between the pin and bushing, as shown in Illustration 3. Correct turning of the pin and bushing is necessary to allow the seal lip to track freely in the wear groove.

Illustration 3. The bushing must be in the correct position for the seal lip to track freely in the wear groove.