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Caterpillar D8H Crawler Tractor

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Caterpillar Crawler Tractors
Caterpillar D8H with an A-Dozer and winch
Caterpillar D8H with an S-Dozer and 8D Ripper
Caterpillar D8H Hinge Ripper
Caterpillar D8H controls
The Caterpillar D8H crawler tractor was introduced in 1958 in the USA. Production in Scotland began a year later.

[edit] Features

The D8H has a D342 six-cylinder engine. It came standard with an 84-inch (213-cm) track gauge. All USA tractors were introduced with 225 flywheel horsepower (FWHP), Scotland tractors with 235 FWHP.

The D8H is available with direct drive or powershift transmission.

[edit] Configurations

Direct drive tractors were manufactured in the USA, with a 36A serial number prefix, and in Scotland, with a 22A and 52A prefix. The 36A and 22A had turbocharged engines.

Powershift tractors were manufactured in the USA, with a 46A prefix, and in Scotland, with a 68A prefix.

[edit] Modifications

In 1959 and 1961, USA tractors had their horsepower increased to 235 FWHP, beginning with 36A01229 and 46A03044.

Production of 52A ended in 1961.

In 1966, all D8H tractors had their horsepower increased to 270 FWHP, beginning with 36A04649, 46A12885, 22A01247, and 68A01209.

Production of 22A ended in 1969.

In 1970 and 1971, an electric starter was made standard in D8H tractors, beginning with 36A05329, 46A24433, and 68A03847.

In 1971 and 1972, a two-piece master link was added to D8H tractors, beginning with 36A05403, 46A26652, and 68A04265.

Also in 1971 and 1972, a roll over protection system was added and a seven-roller track was made standard, beginning with 36A05519 and 46A28928.

In 1971 and 1974, Caterpillar added pinned equalizer bar suspension, beginning with 36A05519 and 46A32803.

Production of the D8H ended in 1974.

The Caterpillar D8H was replaced by the Caterpillar D8K.

Based on data from the sales database of Ritchie Bros. Auctioneers, it is estimated that more than 46,800 Caterpillar D8H crawler tractors have been produced.

Highest Serial #
Scotland
22A 01368
52A N/A
68A 05717
USA
36A 05710
46A 34082
Total = 46,877