Henry Schinske of Henry’s Custom Dozer Service is coming up on his 60th anniversary of operating Cat® dozers. His collection includes a Cat D5B dozer.

1. D5b Cat Dozer Parts

Winch mounted to a Caterpillar D5BThe Caterpillar D5B crawler tractor was introduced in 1997 in the USA, Japan, and France. Production began in Brazil in 1988. Features The D5B has a 3306 six-cylinder engine producing 105 flywheel (FWHP). It comes standard with oil-cooled clutches and, combined steering, single-lever dozer control, sealed and lubricated track (SALT), electric hour meter, and fuel system water separator. Configurations It is available in two configurations: the standard model has a track gauge of 74 inches (188 cm); the Low Ground Pressure (LGP) configuration has an 81-inch (206-cm) track gauge. Both are available with either. Standard configuration, direct drive tractors were manufactured in the USA, with a 23X, 25X, or 26X serial number prefix; in Japan, with a 47X prefix; and in France, with a 21Y or 43X prefix.

The 26X and 21Y units are special application (SA) tractors with 90 FWHP. The 47X unit has roll over protection system (ROPS) adaptability. Standard configuration powershift tractors were manufactured in Japan, with a 48X prefix, and in France, with a 44X prefix. The 48X unit has a direct injection scroll metering fuel system (SMFS) and 75 FWHP. LGP configuration, direct drive tractors were manufactured in Japan, with a 49X prefix, and in France, with a 45X prefix.

The 49X unit has ROPS adaptability. LGP configuration powershift tractors were manufactured in France only, with a 46X prefix. Also manufactured three D5B tractors with 60-inch (152-cm) track gauges. The direct drive unit was manufactured in USA only, with a 22X prefix. The powershift unit was manufactured in the USA, with a 24X prefix, and in France, with an 8MB prefix. The 8MB unit has a 3306 direct injection (DI) engine. Modifications Between 1978 and 1981, Caterpillar installed a 3306 DI engine, SMFS and a fail-safe parking brake into most units manufactured in Japan and France, beginning with 44X00411, 21Y00558, 43X00722, 45X00422, 46X00724, 47X00520, 48X00589, and 49X01412.

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However, many of the above features were added separately on the American units. The 3306 DI engine and SMFS were installed in 1980, beginning with 22X00439, 23X00778, 24X00413, 25X01815, and 26X00878.

The fail-safe parking brake was added in 1981, beginning with 22X00531, 23X00842, and 25X02073. Between 1979 and 1981, Caterpillar modified the steering valves on most units, beginning with 47X00395, 48X00433, 49X01119, 43X00643, 44X00589, 45X00422, 46X00724, 22X00542, 23X00866, and 25X02090. In 1980, a standardized neutral start was installed in some units, beginning with 21Y00496, 43X00628, 47X00482, and 49X01250.

D5b Cat Dozer Parts

Meanwhile, a neutral start switch was added to a few of the American units, beginning with 22X00459, 23X00786, and 26X00884. Production of 23X ended in 1982. In 1984, Caterpillar installed a standardized blow fan in both SA units (26X and 21Y), beginning with 26X01146 and 21Y00608. The 26X unit had its horsepower increased to 105 FWHP at the same time. Production of 25X and 26X ended in 1984. Production of 22X, 24X, 43X, and 45X ended in 1985. Production of 47X, 49X, 44X, and 46X ended in 1986.

Production of 48X ended in 1987. Production of 21Y and 8MB ended in 1988. Caterpillar began production of the D5B in Brazil the same year. Two units were manufactured in Brazil. Both are standard configuration tractors with 3306 direct injection engines and Bosch fuel injection systems. They were intended for the domestic Brazilian market only. The direct drive unit has 105 FWHP and was given a 5LD prefix; the powershift unit has 114 FWHP and was given an 8HD prefix.

Production in Brazil ended in 1992. Based on data from the sales database of, it is estimated that more than 14,500 Caterpillar D5B crawler tractors have been produced. Highest Serial # Brazil 5LD N/A 8HD N/A France 21Y 00719 43X 00686 44X 01981 45X 00414 46X 00952 8MB 00348 Japan 47X 00587 48X 00783 49X 02065 USA 22X 00621 23X 00910 24X 00649 25X 02664 26X 01128 Total = 14,507.