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A bulldozer or dozer (also called a crawler) is a large, motorized machine equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction work. It travels most commonly on continuous tracks , though specialized models riding on large off-road tires are also produced.
Clark initially built 14 operational dozers and conducted extensive tests at their facilities. Once proven, the military ordered 800 more and eventually extended that figure. The War Department worked with Clark Machine over the course of the years 1942 and 1943 ordering many CA-1s by the end of World War 2.
The Oliver OC-9 was the first tractor crawler by Oliver Farm Equipment Company to employ the use of a torque converter. [2] Along with the OC-96 variant, this model was introduced in 1959 as the final model in the OC series, [1] marking a significant advancement in the company's technological standards.
The Komatsu D575A is a 1,150 horsepower (860 kW) tractor crawler produced in a 'SR' or Super Ripper bulldozer/ripper configuration, or as a dedicated bulldozer in the form of the 'SD' or Super Dozer. [1] Both models can move 90 cubic yards (69 m 3) of material per pass using the standard blade.
As of May 2017, according to Trade Arabia, Case "sells a full line of construction equipment around the world, including the number one loader/backhoes, excavators, motor graders, wheel loaders, vibratory compaction rollers, crawler dozers, skid steers, compact track loaders and rough-terrain forklifts." [12]
The D9 is a series of heavy tracked-type tractors, carried on continuous tracks and usually used as bulldozers. The series began in 1954 with a prototype tractor called the D9X. Ten D9X prototype models were built in 1954. In 1955, the 286 hp (213 kW) D9 was introduced to compete against the more powerful Euclid TC-12.
Several types of bulldozer blade can be used on the front of the tractor: Straight ("S-Blade"): A short blade with no lateral curve and no side wings. It can be used for fine grading; Angle: held by a U shape frame that has three holes on each side, to set the blade to 3 positions: right, center, and left.
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 ...