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Caterpillar first introduced the RD4 in 1936, [1] as the diesel follow on to the successful CAT 30 gas model. 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 ]
The original model was the Challenger 65 featuring the Mobile-Trac System (MTS) consisting of rubber tracks and a suspension system. [1] Although marketed as the world's first rubber-tracked agricultural tractor, a company using surplus equipment inspired by the design of military tanks had produced a considerable number of rubber tracked tank tractors.
1987: D8N (285 hp [213 kW]) with differential steer transmission, the first track-type Caterpillar tractor to have one (the new D8N was smaller than the old D8L size, which was replaced by the new D9N model). 1996: 305 hp (227 kW) D8R replaced D8N. 2000: D8R Series 2 replaced the D8R. 2004: 310 hp (230 kW) D8T ACERT replaced D8R Series 2. [1]
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 ...
The 370 hp (280 kW) D9N replaced D8L in 1987 (this was due to a model number/size adjustment by Caterpillar in their larger bulldozer lineup at the time, allowing them to introduce a smaller D8N model below the larger D8L size). Due to the model adjustment, the D9L is the most powerful D9 in history, with a flywheel power of 460 hp (340 kW).
For example, the D5H came out years before the D5C. Caterpillar has now turned to a straight number designation (no letters) for all of its new track-laying tractors — starting, for the first time, with the D-1 and going all the way up to the D-11, with consistent size and weight breaks between each model.
The Caterpillar C27 is a V12 diesel internal combustion engine made by Caterpillar. The engine is 27 litres (1,648 cu in) in displacement. Each cylinder has a bore of 137 mm (5.4 in) and a stroke of 154 mm (6.1 in). The engine can produce 370–750 kW (500–1,000 hp) at 2100 RPM. The peak torque occurs at an engine speed of 1400 RPM. This ...
The Caterpillar C175 is a family of diesel internal combustion engines made by Caterpillar. The engine is 5.3 litres per cylinder in displacement. The cylinder size is 175 millimetres (6.9 in) x 220 millimetres (8.7 in) bore/stroke. The engine can produce 1500-4800 horsepower at 1800 RPM. The peak torque occurs at an engine speed of 1500 RPM.