track). Use an outside caliper and ruler, as shown in figure 6-20. Measure the outside of the bushing where it shows the most wear and compare it to the manufacturer's specifications.

Measure track pitch with a ruler or tape measure after tightening the track to remove any slack, as shown in figure 6-21.

Should the bushing wear or track length be excessive, remove the track for rebuilding unless facilities and time do not permit. Rebuilding a track will nearly double the useful life of the pin and bushings.

Figure 6-20. - Bushing wear measurement.

Figure 6-21. - Track pitch measurement.

Track Shoes

The most common track shoe is the grouser shoe shown in figure 6-22. This shoe is standard on all crawler-mounted dozers. The extreme service track shoe (fig. 6-23) is equipped on crawler-mounted dozers that operate primarily in rocky locations, such as rock quarries and coral beaches. Notice the grouser, or raised portion of the shoe, is heavier than the standard grouser shoe.

Another shoe common to track-mounted front-end loaders is the multipurpose shoe. This shoe has three grousers that extend a short distance above the shoe and are equally spaced across its face. The multi- purpose shoe allows more maneuverability with less wear on the track and track frame components.

NOTE

The grouser absorbs most of the wear and its condition indicates when the track needs replacement or overhaul.

Figure 6-22. - Standard grouser shoe.

Figure 6-23. - Extreme service track shoe.