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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 Oct 1943 American and New Zealand troops land at Mono and Stirling, Treasury Islands, south of Bougainville [25-27 Oct].  More 
25 Oct 1944 First operation by the Japanese Kamikaze Special Attack Force: 55 kamikazes strike 7 carriers and 40 other ships, sinking six, off Leyte, Philippines.
25 Oct 1944 Battle off Samar [Leyte]: US Admiral Sprague skillfully prevents a loss to the stronger Japanese force under Japanese Admiral Kurita.
25 Oct 1944 Battle off Cape Engaño (Leyte): lopsided naval battle resulting in the loss of most of Japanese Northern Force to US Admiral Halsey's carrier planes and battleships [25-26 Oct].
25 Oct 1944 Soviet Red Army enters Kirkenes, the first town in Norway to be liberated from the Germans.
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:

Allis Chalmers M4 18ton high speed tractor w/winch, prime mover for the 90mm AA gun, 155mm Gun M1, 8in howitzer M1 and others, NAB, Hampton Roads Port of Embarkation, Newport News, VA, 16 August 1943.  Notes from original caption: Medium Tractor M4 (155 MM, Allis Chalmers) #M4-443 W/Winch Force USA #993419, Wt. 20700, Cube 1168.
M4 18-ton High Speed Tractors, ETO, August 1945.
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.
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.
Battery of M-114 155mm Towed Howitzers, 82nd Field Artillery Battalion (155mm), 1st Cavalry Division, Korea, 31 July 1950.  Appear to be prime mover M4 / M5 high speed tractors in left background.
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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