![]() With the introduction of the 2U series Caterpillar also started to supply its own blades and attachments, although other brands could still be specified at the buyer’s request.Ī fully equipped D8-2U weighed approximately 18 tons. Immediately following the war Caterpillar introduced a new version of the D8, the 2U series, which sported several refinements over its predecessors and of course, more horsepower – 144 at the flywheel.ĭuring its lengthy production life this particular version of the D8 saw numerous improvements and upgrades as the type was developed, most notable of which was a new five-speed transmission the replacement of the standard dry type clutch with Caterpillar’s famous oil clutch which extended service life of this critical component by a considerable margin. This designates US Navy 7 th fleet, which operated in the Pacific area. Quite a few of these machines ended up in New Zealand following WWII and can be identified as ex-military machines by the figures “US7” stamped into the serial number plate above the machine’s serial number. ![]() Attachments were still sourced through LeTourneau and LaPlant-Choate. The D8 (8R series) was manufactured throughout WWII and thousands were supplied to the US armed forces.Įngine horsepower of the D13000 was increased to 132 and the weight rose to 17 tons. Powered by a 115 horsepower six-cylinder naturally aspirated Caterpillar model D13000 diesel engine they weighed approximately 16.5 tons (depending on equipment) and had a six-speed manual transmission.īulldozer blades and other operating equipment was normally supplied by outside manufacturers such as LeTourneau or LaPlant-Choate, Caterpillar’s preferred suppliers.Īccording to Caterpillar records, just under 10,000 of the 1H series were manufactured up until 1941 when the 8R series replaced it. ![]() The early D8sĭeveloped from the successful model Diesel 75, the original D8 machines were known as RD8s (the ‘RD’ designation was dropped halfway through production) and carried the series number 1H. This segment of the Caterpillar D8 story will deal only with the conventional drive tractors, that is, non hi-drive machines (RD8 thru D8K). A true classic tractor in every sense of the word, the Caterpillar D8 has been around in various forms since 1935. ![]()
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