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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: 25 Jul 1943 As defeats pile up, Mussolini replaced by Badoglio as Italian Premier.  More 
25 Jul 1944 Operation COBRA starts US breakout from Normandy.
25 Jul 1944 Air combat between an Me-262 and an RAF Mosquito, the first combat involving the German experimental jet fighter.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

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.
Allis Chalmers M4 18-ton high speed tractor w/winch, prime mover for the 90mm AA gun, 155mm Gun (Long Tom), 8-inch howitzer M1 and others.
M4 High Speed Tractors (HST) of the 110th AAA Gun Bn. (Mobile) load onto LSTs for transport to Normandy, at a port in England, early 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 from 10th AAA Group, used as a prime mover for 120mm AAA, Korea, 1950.
US tractor pulling captured German 88 artillery, ETO circa 1945.

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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