Caterpillar 973 Crawler Loader
The 973 has a 3306 direct injection turbocharged, six-cylinder engine producing 210 flywheel horsepower (FWHP). It has a hydrostatic transmission. It comes standard with an electronic monitoring system, sealed and lubricated tracks, an oscillating undercarriage, and a Z-bar linkage.
The 973 was manufactured in the USA, with a 26Z or 32Z serial number prefix; in Japan, with a 90L or 91L prefix; and in France, with a 66G or 86G prefix.
The 91L and 26Z units have 26.5-inch (67-cm) track shoes. All other units have 19.7-in (50-cm) shoes.
Both American units have a rollover protection system cab.
Production of 26Z ended in 1984.
Production ended in the USA in 1985.
In 1985 the undercarriage was modified, beginning with 90L00638, 91L00168, 66G00833, and 86G00223. Cat added a single section implement pump and dual setting relief valve, beginning with 66G00761, 86G00217, and 90L00729, and 91L00167.
Production of 66G ended in 1987.
In 1989 a horizontal hydrostatic filter base was added, beginning with 86G00829.
In 1990 Cat changed the track roller frame and shortened the equalizer bar, beginning with 86G01087.
Production ended in Japan in 1996.
Production ended in France in 1999; it was replaced by the Caterpillar 973C.
Based on data from the sales database of Ritchie Bros. Auctioneers, it is estimated that more than 6,800 Caterpillar 963C crawler loaders have been produced.
|Total = 6,884|