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The Caterpillar D7 is a medium track-type tractor manufactured by Caterpillar Inc. and most commonly used as a bulldozer. The D7 was first manufactured in 1938. A series of improved models were later produced, including the D7C in 1955, the D7D in 1959, the 160 hp (120 kW) D7E in 1961, the 180 hp (130 kW) D7F in 1969 and the 200 hp (150 kW) D7G ...
This was a conventional Caterpillar D7 bulldozer fitted with armour to protect the driver and the engine. The work was carried out by Jack Olding & Company Ltd of Hatfield . The bulldozer was one of several specialist armored vehicles that were collectively referred to as " Hobart's Funnies " and were operated by the British 79th Armoured ...
1935: RD8 (132 hp [98 kW]) introduced. 1937: The "R" prefix dropped, D8 debuts. 1940s: D8 2U Series (148 hp [110 kW]) introduced; 1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982.
The M728 CEV with an M9 dozer blade assembly and the A-frame crane boom deployed. It is usually equipped with either a hydraulically operated M9 dozer blade assembly or a D7 mine plough. The M9 dozer blade Assembly is used for clearing the way, filling depressions, leveling ground and for other purposes.
The Israeli D9R bulldozers weigh roughly 62 tonnes and are four metres tall and wide, and eight metres long. In 2015, they were upgraded with “slat armour”, also known as cage or bar armour ...
All used the Cat 3306T 6-cylinder engine. The D6M XL and D6M LGP versions with 140 hp (100 kW) weighed 33,200 and 36,400 pounds (15,100 and 16,500 kg). Respectively, closer to the older D6C and D6D. Both used the Cat 3116T engine.
D5N was replaced with the D6K low drive hystat dozer, becoming the D4 in 2021; D5 D5LGP (current version) released in 2019, as a replacement for the D6N. High drive power shift dozer. The following models originated with the MHI (Mitsubishi Heavy Industries) partnership, providing smaller, low drive dozers, in the 20,000 lb range.
The RD4 originally weighed in at 10,000 pounds (4,500 kg), and used Caterpillar's D4400 engine, an inline four-cylinders, with a 4.25 by 5.50 inches (108 mm × 140 mm) bore and stroke. [2] In 1935 Caterpillar had started the naming convention of "RD" for diesel or "R" for regular gasoline, followed by a number to indicate the relative engine ...
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