Equipment Specs
Content
Languages

Caterpillar D6H Crawler Tractor

From RitchieWiki

Caterpillar Crawler Tractors
Caterpillar D6H with S-Dozer and Ripper
Caterpillar D6H with an A-Dozer
Caterpillar D6H cab with standard controls
Caterpillar D6H cab with differential steer controls
The Caterpillar D6H crawler tractor was introduced in 1985 in the USA as the replacement for the D6G. Production began in Japan, Scotland, and India in 1986, and in France in 1987.

[edit] Features

The D6H has a 3306 direct injection turbo, six-cylinder engine producing 165 flywheel horsepower (FWHP). It comes standard with an elevated sprocket, multiple oil-cooled clutches and brakes, a sealed and lubricated track, and closed center hydraulics.

[edit] Configurations

It is available in two configurations: the standard model has a track gauge of 74 inches (188 cm), the same as its predecessor; the Low Ground Pressure (LGP) configuration has an 88-inch (224-cm) track gauge. Both configurations are available with direct drive or powershift transmission. The transmission for a construction application tractor has three forward and three reverse speeds; the agricultural version has six forward and six reverse speeds.

Standard configuration agricultural direct drive tractors were manufactured in the USA, with a 8KB serial number prefix; in Japan, with a 3ED prefix; and in France, with a 1FJ prefix. LGP configuration agricultural direct drive tractors were manufactured only in Japan. They have an 8FC prefix.

Standard configuration construction direct drive tractors were manufactured in France only, with a 4LG prefix. Standard configuration construction powershift tractors were manufactured in the USA, with a 4RC prefix; in Japan, with a 2KD prefix; in Scotland, with a 7PC prefix; and in India, with a 7ED prefix.

LGP configuration construction direct drive tractors were manufactured in Scotland only, with an 8YC prefix. LGP configuration construction powershift tractors were manufactured in the USA, with a 6FC prefix; in Japan, with a 1KD prefix; and in France, with a 2TG prefix.

[edit] Modifications

Production in Scotland ended in 1987. Production of the 8KB unit ended in 1988.

In 1988, Caterpillar introduced a number of new units with differential steering to the USA, Japan, and France. They were available in standard or LGP configuration. Standard configuration powershift tractors with differential steering were manufactured in the USA, with a 3ZF prefix; in Japan, with a 4YF prefix; and in France, with a 6CF prefix. LGP configuration tractors with differential steering were manufactured in the USA, with 3YG prefix; in Japan, with a 4GG prefix; and in France, with a 5HF prefix.

In 1989, Caterpillar installed load-sensing hydraulics into a number of D6H units, beginning with 6FC00692, 4RC02445, 4LG00935, 2TG00525, and 1FJ00482.

In 1990, Caterpillar introduced D6H Series II, beginning with 6FC04000, 4RC04000, 3ZF04000, 3YG04000, 8FC04000, 4YF04000, 4GG04000, 3ED04000, 2KD04000, 1KD04000, 6CF04000, 5HF04000, 4LG04000, 2TG04000, and 1FJ04000. It included the addition of a multiple row module radiator and dual twist tiller control. It also involved increasing the horsepower of some units to 170 FWHP.

In 1992, Caterpillar installed a new cab interior with contour seats, as well as a new fuel gauge and larger fuel tank into many units, beginning with 4RC05500, 6FC05500, 3ZF05500, 3YG05500, 8FC05500, 4YF05500, 4GG05500, 2KD05500, 1KD05500, 6CF05500, 5HF05500, 4LG05500, 2TG05500, and 1FJ05500. Some of the units also had their horsepower increased to 180 FWHP.

In 1992, Caterpillar introduced a number of new units. The new tractors came standard with the all the latest Caterpillar D6H features, as well as a rearward extended track and horsepower increased to 175 FWHP. They are available with the new differential steer feature, which allows the tractor to turn with power supplied to both tracks with a differential of speed. Differential steer tractors were manufactured in the USA, with a 9KJ or 6CK prefix; in Japan, with an 8SK or 2TL prefix; and in France, with a 9LK or 1YL prefix. Powershift tractors were manufactured in the USA, with an 8ZJ or 5KK prefix; in Japan, with a 9RK, 7ZK, or 2DK prefix; and in France, with an 8KK or 2BL prefix. The Japanese 2DK unit received horsepower increased to 185 FWHP.

In 1993 and 1994, Caterpillar replaced the R12 Freon in the air conditioning systems with R134A refrigerant on most units, beginning with 9KJ00441, 8ZJ00319, 6FC05542, 6CK00354, 5KK00336, 4RC05589, 3ZF05736, 3YG05772, 9RK00308, 8SK00369, 8FC05612, 7ZK00349, 4YF05575, 4GG05632, 2TL00346, 2KD05618, 1KD05600, 9LK00464, 8KK00314, 6CF05565, 5HF05582, 4LG05598, 2TG05593, 2BL00347, 1YL00320, and 1FJ05542.

In 1994, Caterpillar made a heavy-duty sealed and lubricated track standard, beginning with 9KJ00621, 8ZJ00321, 6FC04092, 6CK00381, 5KK00340, 4RC05653, 3ZF05954, 3YG04290, 9RK00323, 8SK00382, 8FC05633, 7ZK00364, 4YF05592, 4GG05695, 2TL00359, 2KD05651, 2DK05513, 1KD05638, 9LK00458, 8KK00314, 6CF05556, 5HF04276, 4LG05596, 2TG04093, 2BL00346, 1YL00320, and 1FJ05542.

In 1995, Caterpillar installed reduced emission engines in all the USA manufactured units, beginning with 9KJ01053, 8ZJ00340, 6FC05596, 6CK00399, 5KK00349, 4RC05827, 3ZF06218, and 3YG06215.

Most production of the D6H ended in 1996; however, it continued until 1997 in India.

The Caterpillar D6H was replaced by the Caterpillar D6R.

Based on data from the sales database of Ritchie Bros. Auctioneers, it is estimated that more than 29,000 Caterpillar D6H crawler tractors have been produced.

Highest Serial #
France *04400+ **05500+
1FJ 00480 05542
1YL N/A
2BL N/A
2TG 00542 04092 05623
4LG 01073 04428 05578
5HF 00487 04288 05925
6CF 00803 04349 05676
8KK N/A
9LK 00815
India *04400+ **05500+
7ED N/A
Japan *04400+ **05500+
1KD 00705 04447 05813
2DK N/A
2KD 00801 04231 05703
2TL 00404
3ED 00457
4GG 00557 04327 05852
4YF 00751 04136 05567
7ZK N/A
8FC 02299 04414 05685
8SK N/A
9RK 00328
Scotland *04400+ **05500+
7PC 00737
8YC 00511
USA *04400+ **05500+
3YG 00582 04298 06475
3ZF 02147 04478 06415
4RC 02611 04298 05885
5KK N/A
6CK 00398
6FC 00912 04098 05633
8KB 00501
8ZJ 00345
9KJ 01588
Subtotal 20,834 3,884 4,372
Total = 29,090

*When Series II was released Caterpillar jumped the serial numbers to 04000. (Example: 04001 is actually only 1 tractor produced)

**Serial number jumped again to 05500. (Example: 05501 is actually only 1 tractor produced)