Inspect Track Seal Load Rings Caterpillar

Problem:

Recently, defects have been observed on track seal load rings on numerous models. See Table 1 for part numbers and specific models.

Solution:

Inspect new track seal load rings before installing for defects or surface variations. The examples below offer general guidelines showing what degree of surface variation is considered a defect that may lead to premature seal failure.

1. Evidence of tearing or missing material along the "heel" of the seal (the edge corresponding to the link counterbore corner) may indicate a defective seal. Do not use load rings with any evidence of tearing or missing material along this area. See Illustrations 1 and 2 for examples of defective load rings.

Illustration 1.

Illustration 2.

2. Evidence of tearing or missing material in locations other than the "heel" are acceptable. Load rings with areas less than 5mm x 8mm (.20 inch x .32 inch) of material missing other than at the "heel" area are not defective and can be used. See Illustrations 3 and 4 for examples of a load ring with acceptable surface variation.

Illustration 3.

The load ring shown above is not defective. Note that surface variations are small, away from the "heel".

Illustration 4.

The area of surface shown above is known as the "gate". Often, the gate area appears somewhat rough. This roughness is not a load ring defect.

COPYRIGHT 1999 CATERPILLAR ALL RIGHTS RESERVED