Prior to and during the second world war the US Army called several tractors M1 medium tractor. Under the Ordnance Corps these "off the shelf" tractors were meant to tow artillery pieces, so were not equipped with blades like their engineer counterparts. Eventually these were replaced by purpose built "high-speed tractors" (HST). Some tractors were equipped with crane attachments for ammunition, and material handling.
Tractors Caterpillar model 30 Caterpillar model 35 Allis-Chalmers HD-7W. Allis-Chalmers Monarch k35 Cletrac model 35 Caterpillar model Caterpillar RD6 Caterpillar D6 Cletrac model BC, w/angle dozer Allis-Chalmers WM G-132: a) M1 medium tractor TD-14, b) M3 tractor crane, 2-Ton, International Harvester TD14
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Detailed information on Allis-Chalmers model WM Engine: Allis-Chalmers WM. Gasoline. 4-cylinder Fuel tank: 24 gallons gearbox: Four speeds forward, one reverse. Length: Width: Height: Working weight:
See also M1 heavy tractor M1 light tractor M2 light tractor List of U.S. military vehicles by model number List of U.S. military vehicles by supply catalog designation
References TM 9-783B Manual Allis-Chalmers HD-7W TM 9-1783A A-C HD-7W Diesel engine. TM 9-1783B (coming soon) TM 9-1783C TM 5-3272 IHC TD-14