To my surprise I found nearly nothing out here, so I started my. 7U, 40A, 78A, 22C Dozer Model 8A 8S 8A 8S 7A 7S 7A 75 6A - 74 ' 65-74 ' 6A. After buying an apple orchard and then buying a 1940 D4-7J, I looked for D4 FB groups. The Caterpillar D4 was used as the base tractor for the Trackson built loader that was known as the T4 or Traxcavator shovel. Cat D8 D7 D6 D5 D4 Track - Type Tractor 36A, 46A 47A, 48A 74A, 76A 82H. Caterpillar D4 - 1945-47 (5T) with 4-cylinder D4400 engine.Caterpillar D4 - 1943-45 (2T) with 4-cylinder D4400 engine.Caterpillar D4 - 1939-43 (7J) with 4-cylinder D4400 engine.Caterpillar D4 - 1937-39 (4G) with 4-cylinder D4400 engine.Caterpillar RD4 - 1936-37 (4G) with 4-cylinder D4400 engine.The later D4 series engines quickly increased in power, so the number "4" just became a figure of merit rather than indicating actual engine power. The D4 U series was fitted with the more powerful D315 engine. At the time of introduction of the RD4, the D4400 engine produced about 43 horsepower (32 kW) at the drawbar so the 4 indicated the relative engine power. In 1937 the "R" was dropped, and just a "D" was used for the diesel versions. 1953 Caterpillar D4 7U, 18 pads, starts, runs and operates as it should. 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 size. 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. The Caterpillar D4 track-type tractor is a small bulldozer manufactured by Caterpillar Inc.Ĭaterpillar first introduced the RD4 in 1936 as the diesel follow on to the successful CAT 30 gas model. Rebuilt front idlers, Painted the iron & rebuilt the seat. Pony motor runs well was rebuilt, has electric start, Hydraulic system works, repaired the blade push frame. Not sure of the year all tags were long since removed from the machine. Small bulldozer Caterpillar D4H LGP (Low Ground Pressure) model, Eschborn, Germany. Cat D4 7u for sale was created by Thorin.
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