![]() The engine is a Caterpillarĭiesel, but is started by a "pony motor." The pony Of the item to lower each implement piece (such as dozer blades, Of the implements towed/utilized by this crawler were heavyĮnough to let gravity work with the CCU, by allowing the weight Implements via a Cable Control Unit (CCU) made by LeTourneau,Īnd is shown here mounted to the rear of the old Cat. Not have hydraulics, but instead operates all of its attached/towed This is my Grandfather's old 1950 Caterpillar D7-3T. It was incredibly difficult, expensive,Īnd time-consuming, but we got it done and the property sold Period with my truck & trailer in order to get all of Had to make 1100-mile roundtrips twice a month during this Of vehicles and equipment, which took almost a year I also Tractors and Caterpillar crawlers, and tons and tons of garbageĪs well as scrap metal. Plows and implements, 17 old cars & trucks, several old We were left toĬlean up his old 3-acre farm that was just jam-packed withĪll kinds of junk.there were also dozens and dozens of old To move into an assisted-living facility. ![]() D7E (47A) sn 1624 from 1963 of C.Section: 1950 Caterpillar D7-3T Cable-Operated Crawler/Dozer.D7 3T (4T) from 1944 in the collection of John Walker collection from Retford in Nottinghamshire.(A they have every other one from a D2 to a D9 ) (the machine looks in a very poor state of repair and the wide tracks are self made) The Vintage Excavator Trust site in Cumbria has a D7 with Wide tracks stored there.Another D7 is in the Fred Knight collection.The machine has a 5F - 4R gearbox with FR shuttle transmission. This machine has a Caterpillar D8800 engine of 80 hp. D7 (7M) SN 9103 has been preserved by ACMOC member Paul Tolfield.Multiple shank for general surface loosening.Various other blade types are used including landfill U-Blades, woodchip U-blades, and two-way blades for work inside the holds of ships. An "S-U" combination blade: A shorter blade, with less curvature, and smaller side wings.A universal blade ("U-Blade"): A tall and very curved blade, and has large side wings to carry more material.An angle blade: Is held by an U shape frame that has 3 holes on each side, to set the blade to 3 positions: to the right, center, and left.A straight blade ("S-Blade"): A short blade and has no lateral curve, no side wings, and can be used for fine grading.Several types of bulldozer blade can be used on the front of the tractor: The D7H was the first D7 with the elevated drive sprocket undercarriage 1986: D7G replaced by D7H with elevated sprocket design.1955: D7 3T Series ends production with over 28,000 machines produced 128 hp (95 kW) D7C 17A series introduced with new D339 diesel engine. ![]() 1944: D7 3T series introduced Deal with LeTourneau ends, and Cat introduces own Bulldozer Blade design.1938: The "R" prefix dropped, D7 débuts.1935 Caterpillar RD7 9G series replaces the 5E series.1935: Caterpillar RD7 5E series introduced, as upgrade to the Caterpillar Diesel Fifty.A few examples have started to be saved and are appearing in plant collections and at shows.Ī Caterpillar D7E-47A at Belvoir Castle Steam Festival 2010 (blade removed for transport) After the war they were sold off and contractors and farmers bought them. ![]() The UK received some of the early models under lend lease during WWII. A lot of tractors were sold for pulling Scrapper boxes and trailed implements. Early versions had Bulldozer gear by 3rd party manufacturers like LeTourneau added that used cable control units before hydraulics became more common after WWII. Though it comes in many configurations it is most commonly sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment in recent years. The Caterpillar D7 is a large track-type tractor designed and manufactured by Caterpillar Inc. Caterpillar D7-3T of 1944 Standing outside the George Stevenson hall at Newark VTH show 2008
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