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| Illustration 1 | g00300858 |
The rubber belt is composed of several layers of cable. The cables are similar to the cables in automotive tires. The most important set of cables is located about 8 mm (.3 inch) beneath the inside surface of the belt. These cables are called zero degree cables (1). The zero degree cables withstand the track tension. Other sets of cables are located between the zero degree cables and the outside surface of the belt. These cables are called breaker cables (2). Breaker cables lie in various angles in order to provide lateral support. Also, breaker cables protect the zero degree cables.
When any of the cables are exposed to moisture by cuts or gouges in the rubber, the cables can rust. Any exposed cables should be repaired as soon as possible. Consult any Caterpillar dealer.
Any damaged zero degree cables that protrude above the surface of the belt should be repaired. Repair the cables by clipping or grinding the cable. Clip or grind the cable so that the cable is below the surface of the belt. This will prevent additional damage.
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| Illustration 2 | g00300859 |
Cuts, gouges, and minor wear on guide blocks (3) will not cause operational problems. However, a belt that is missing two or more consecutive guide blocks should be replaced. A belt that is missing two or more consecutive guide blocks may come off the trailer. This could damage other components on the undercarriage.