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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: 22 Oct 1941 Delayed bomb set by the Soviets detonates in Romanian headquarters, killing 67 people including the Romanian commander and other Romanian and German officers.  More 
22 Oct 1943 German industrial and population center of Kassel targeted by 569 RAF bombers that dropped more than 1,800 tons of bombs, causing heavy damage in a firestorm.
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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:

A 4-gun 90mm M1A1 Anti-Aircraft Artillery Gun (AAA Mobile) Battery moves through Caligny, France, circa 1944.  M4 High Speed Tractors are the prime movers for the 90mm AAA.  The distinctive perforated firing platform of the gun to extreme right can be seen in its folded, travelling position.
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.
M4 18-ton High Speed Tractor, Ordnance reference photo at General Motors Proving Ground, 6 January 1944.  View from right, front.
Eighteen military vehicles from the Hudson-Mohawk Military Vehicle Collectors Club, and over 100 people, represent Watervliet Arsenal (NY) in the City of Albany NY Veterans Day celebration, 11 November 2011.  The lead vehicle is an M4 High Speed Tractor towing heavy artillery, followed by jeeps and trucks.
105th FA Bn, M1 8-inch howitzer towed by M4 High Speed Tractor (HST) near Carentilly, France, 31 July 1944.
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.

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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