The Caterpillar D9N crawler tractor was introduced in 1986 as the replacement for the D9L.

[edit] Features

The D9N has a 3408 direct injection turbocharged eight-cylinder engine producing 370 flywheel horsepower (FWHP). It comes standard with an elevated sprocket, multiple disc oil-cooled steering clutches and brakes, sealed and lubricated track (SALT), hydraulic system, an 89-inch (226-cm) track gauge, and a three speed forward, three reverse powershift transmission.

It was manufactured in the USA only, with a 1JD serial number prefix.

[edit] Modifications

A certified rebuild was offered on the 1JD, beginning with 1JD75000.

Production of the 1JD ended in 1993.

In 1993, Caterpillar began manufacturing a new D9N, with a 6XJ prefix. Including all the 1JD features, it added a computerized monitoring system and a dual-tilt attachment dozer blade.

Production of the D9N ended in 1995.

The Caterpillar D9N was replaced by the Caterpillar D9R.

Based on data from the sales database of Ritchie Bros. Auctioneers, it is estimated that more than 5,000 Caterpillar D9N crawler tractors have been produced.

Highest Serial #

USA
1JD	03921
6XJ	01127
Total = 5,048