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Allis-Chalmers Co. HD10W

The Allis-Chalmers HD10W Tractor / Bulldozer was introduced in 1940. About 1,760 HD-10W units were used by the U.S. military during WW II. The HD-10 continued to be manufactured until 1950.

The HD-10W was the wide-track version of the HD-10, with a 74 inch gauge. Models produced during WW II (until s/n 5574) had tracks with 32 links and five rollers. The reliability of the HD10W in military service moved Allis-Chalmers forward as a producer of tractors following WW II.

Spring 1944 photo of Allis-Chalmers Co. HD10W Tractors at the Engineer Depot, Thatcham, England in preparation for the D-Day invasion, 6 June 1944
Spring 1944 photo of Allis-Chalmers Co. HD10W Tractors at the Engineer Depot, Thatcham, England in preparation for the D-Day invasion, 6 June 1944.

Today in WW II: 30 Jul 1940 President of Estonia, Konstantin Päts, is imprisoned by Soviet agents and deported to Russia.  More 
30 Jul 1944 Operation Bluecoat begins, an attack by British Second Army supporting breakout in Normandy, aimed to secure the Vire junction and high ground of Mont Pinçon [30 Jul-7 Aug].
30 Jul 1945 USS Indianapolis [CA-35] torpedoed by Japanese submarine, sinks in 12 minutes killing 300 immediately, leaving 900 men in shark-infested waters without lifeboats; only 316 rescued 4 days later.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

Allis-Chalmers Co. HD10W Tractor / Bulldozer (G-98)

During WW II, the Allis-Chalmers HD10W was one of the bulldozers collectively known as "Tractor, Heavy, M1." The Allis-Chalmers Co. HD10W was Ordnance G-98. Equivalent tractors were produced during WW II by Caterpillar Tractor Co. (Model D7, G-126) and International Harvester (Model TD-18, G-101).

Allis-Chalmers Co. HD10W Characteristics

Weight25,500 lbs
Length14 ft 5.5 in
Width8 ft 3 in
Height8 ft 3 in
EngineGMC 4-71 RC14 in line 4 cyl diesel
Drawbar hp82
Transmission6 fwd/2 rev
StarterElectric
Winch30,000 lbs

Manuals for the Allis-Chalmers Co. HD10W include:

  • TM 9-1787A, Heavy Tractor M1, Engine
  • TM 9-1787B, Heavy Tractor M1, Engine Accessories
  • TM 9-1787C, Heavy Tractor M1, Electrical System, Power Train, Frame, and Tracks

Allis-Chalmers Co. HD10W Tractor / Bulldozer
Allis-Chalmers Co. HD10W Tractor / Bulldozer.

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