Caterpillar D4

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Caterpillar D4H LGP (Low Ground Pressure) model, Eschborn, Germany. Planierraupe DSCF5195.jpg
Caterpillar D4H LGP (Low Ground Pressure) model, Eschborn, Germany.

The Caterpillar D4 track-type tractor is a small bulldozer manufactured by Caterpillar Inc.

Contents

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] 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. [3] In 1937, the "R" was dropped, and just a "D" was used for the diesel versions. 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. The D4 U series was fitted with the more powerful D315 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.

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Tracked shovels

The Caterpillar D4 was used as the base tractor for the Trackson built loader that was known as the T4 or Traxcavator shovel. [6]

See also

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References

  1. Orleman, Eric C. (2006) Caterpillar Motorbooks, St. Paul, Minnesota, page 38, ISBN   0-7603-2553-7
  2. Leffingwell, Randy (1996) Classic Farm Tractors: History of the Farm Tractor Motorbooks International, Osceola, Wisconsin, page 70, ISBN   0-7603-0246-4
  3. Archived February 24, 2008, at the Wayback Machine
  4. Caterpillar Chronicle by Eric C.Orlemann, published by MBI
  5. Caterpillar Pocket Guide, by Bob LaVoie
  6. 1 2 3 4 5 6 7 Caterpillar by Eric Orlemann, pub by MBI, ISBN   0-7603-0529-3