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M-4 High Speed Tractor

The M4 18-ton High Speed Tractor was designed as a prime mover for towing large field artillery guns such as the 90mm Anti-Aircraft gun, the 155mm Long Tom, the 8in. Howitzer, or other heavy weapons (See the Towed Artillery Chart). In addition to moving the gun, the M-4 High Speed Tractor carried ammunition in cargo space racks. Ten men plus the driver could be carried. The M-4 HST was manufactured by Allis-Chalmers Mfg. Co. of Milwaukee, WI starting in 1942 and was in U.S. military service until approximately 1960.

The M-4 High Speed Tractor was equipped with air and electric brakes that would match any types of brakes on the towed load.

An anti-aircraft .50 cal. machine gun on a ring mount was accessed through a hatch above the crew compartment.

M-4 High Speed Tractor
M-4 High Speed Tractor

Today in WW II: 29 Jul 1938 Japanese invasion of territory claimed by the USSR [Battle of Lake Khasan, 29 July-31 August].   

Specifications of the M-4 High Speed Tractor

CrewDriver
Weight31,500 lbs.
Height7 ft, 10 in.
Width8 ft, 1 in.
Length17 ft, 2 in.
EngineWaukesha 145GZ 6 cyl. gasoline
Horsepower210hp
Road Speed35 mph
Range180 mi.

M-4 High Speed Tractor Photos

Find additional photos and hi-res versions of the M-4 High Speed Tractor at the Olive-Drab Military Mashup:

M4 18-ton High Speed Tractor towing an M1A1 155mm Long Tom gun, mounted on an M1 carriage, over a ponton causeway reaching from an LST to shore on Saipan, June 1944.
Vast amount of used and unused war material awaiting loading on flat cars enroute to various Army Service Depots, Hampton Roads Port of Embarkation, Newport News, VA, 11 January 1946. These materials were unloaded at Norfolk Army Base, HRPE, arriving from ETO, Middle East and African Theaters.  Vehicles:  CCKW trucks, M4 High Speed Tractors, crawler crane, M4 Sherman tanks, others.
M-4 High Speed Tractor of the 8th Army, 17th Field Artillery, supporting the First Marine Division, stopped by a river near Chunchon, Korea, 1950.
Rear view of M4 High Speed Tractor, led by other vehicles, as they drive into the cobbled streets of Mons at the annual Tanks in Town festival, 18 November 2009.   The 2009 celebration marked the 65th anniversary of the liberation of Mons.
Removing a German 88mm antiaircraft gun after capture by US troops, using an M4 High Speed Tractor (M4 HST), Battery C, 989th FA Bn, Belgium, 5 January 1945.
M4 18-ton High Speed Tractor with towed 8-inch howitzer, 999th FA Bn (Colored), Nantes-Gassicourt, France, 20 August 1944.

M-4 High Speed Tractor Photo Gallery

>M-4 High Speed Tractor at Hampton Roads, VA, 16 August 1943
M-4 High Speed Tractor at Hampton Roads, VA, 16 August 1943.

An M-4 High Speed Tractor of the Seventeenth Field Artillery, supporting the First Marine Division, stopped by a river near Chunchon, Korea, 1950
An M-4 High Speed Tractor of the Seventeenth Field Artillery, supporting the First Marine Division, stopped by a river near Chunchon, Korea, 1950.

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