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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: 26 Nov 1942 Battle of Brisbane: American and Australian soldiers fight in Brisbane, Australia with multiple fatalities [26-27 Nov].   

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:

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.
Presentation of the three main artillery prime mover high speed tractors (HST), circa 1944.  From Field Artillery Journal, April 1944.
M4 18-ton High Speed Tractor, Ordnance reference photo at General Motors Proving Ground, 6 January 1944.  View from right, front.
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.
M1 155mm Long Tom artillery towed by M4 High Speed Tractor, cross a Bailey Bridge over the Seine River, France, circa August 1944.
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.

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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