Heavy Equipment Transport System

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M1070 Heavy Equipment Transporter
M1070 tractor
M1070 Heavy Equipment Transporter.
Place of origin United States of America
Service history
In service 1993-present
Wars Operation Iraqi Freedom, Operation Enduring Freedom, Operation New Dawn
Production history
Designer Oshkosh Corporation
Manufacturer Oshkosh Corporation
Weight 41,000 pounds
Length 30 feet 2 inches
Width 8 feet 6 inches
Height 12 feet 1 inch
Crew 6

Engine Detroit Diesel Series 92 8V92
500 hp
Suspension 8x8
425 miles, 1.7 mpg
Speed 45 mph

The Heavy Equipment Transporter (HET) is a military logistics vehicle used to transport, deploy, and evacuate tanks, armored personnel carriers, self-propelled artillery, armored bulldozers and other heavy vehicles. The primary purpose and use of the HET system is for delivery of the M1 Abrams and recovery of non mission capable armored vehicles.


An M1070 and M1000 loading an M88 Recovery Vehicle in southern Iraq
A Fox NBC-detection vehicle is transported by a HETS trailer

In 1993 the U.S. Army started fielding the M1070 Truck Tractor and the M1000 Heavy Equipment Transporter Semi-trailer. The tractor is produced by Oshkosh Truck, and the trailer is manufactured by Systems & Electronics, Inc. (now DRS Sustainment Systems Inc.) in St. Louis. The HET transports payloads up to 70 tons – primarily Abrams tanks, but is also used for other large military equipment such as forklifts and various tracked vehicles. It is capable of operating on highways (with permits), secondary roads, and cross-country. This version of the HET has a number of features that significantly improve the mobility and overall performance of the system in a tactical environment. The M1070 tractor has front- and rear-axle steering, a Central Tire Inflation System, and cab space for six personnel to accommodate the two HET operators and four tank crewmen. The M1000 semi-trailer has automatically steerable axles and a load-leveling hydraulic suspension. It is air-transportable by both C-5 Galaxy and C-17 Globemaster III aircraft.

The Oshkosh 1070F (8×8) heavy equipment transporter (HET) became the new British Army heavy tank transporter in 2001 replacing the Scammell Commander. The Oshkosh Corporation have supplied over 2,600 Heavy Equipment Transporters to the US Army in various engine configurations such as the 1070E and the 1070E1. The UK version (1070F) is compliant to European legislation on emissions (EURO III).

As of January 22, 2013 Oshkosh set a benchmark in creating the M1070A1. A 700 horsepower Caterpillar® C18 engine provides 200 more horsepower than the original HET. And a single-speed transfer case eliminates the need to stop and shift for operation on grades.

General Characteristics[edit]

M1070 tractor M1000 trailer
Length: 30 feet 2 inches (9.19 m) 51 feet 10 inches (15.80 m)
Width: 8 feet 6 inches (2.59 m) 12 feet (3.7 m)
Height: 12 feet 1 inch (3.68 m)
Weight: 41,000 pounds (19,000 kg) 50,000 pounds (23,000 kg)
Speed: 40-45 mph 45 mph
Fuel: 150 Gallons in the driver-side tank, 100 Gallons in the passenger-side tank
Range: 300 miles
Crew: 2+4
Payload: 140,000 pounds (64,000 kg)
Engine: 500 horsepower Detroit Diesel Series 92 8V92 N/A
Transmission: Allison CLT-755 5-speed automatic with TC-496 torque converter
Fording: 28 in
M1070A1 tractor
Axle Configuration: 8x8
Curb Weight: 45,500 lbs. (20638 kg)
Fifth Wheel Vertical Load: 46,000 lbs. (20865 kg)
Maximum Speed: 50 mph (80 km/h)
Air Conditioning: Standard
Engine: Caterpillar® C18, 700 hp 18.1 L
Transmission: Allison® 4800 SP/7-speed automatic
Transfer Case: Oshkosh® 30000 Series/single speed

M25 Tank Transporter[edit]

M25 Tank Transporter
M26 tractor.
Place of origin  United States
Service history
In service 1941-1955
Wars World War II
Production history
Designer Knuckey Truck Company
Manufacturer Pacific Car & Foundry Co.
Weight 22 tons
Length 7.7 m
Width 3.3 m
Height 3.2 m
Crew 7

Armor front 3/4 inch
sides, rear 1/4 inch
.50 cal M2 machine gun
Engine Type 440 6-cylinder gasoline engine
240 hp
Suspension 6x6
400 km
Speed 26 mph (42 km/h)

The M25 Tank Transporter was a heavy tank transporter and tank recovery vehicle used in World War II and beyond by the US Army.

Nicknamed the Dragon Wagon, the M25 was composed of a 6x6 armored tractor (M26) and 40-ton trailer (M15).


In 1942 a new 40 ton semi-trailer tank transporter was required. This was to offer better off-road performance than the M9 24-small-wheel trailer, and greater capacity than the 30 ton 8-large-wheel Shelvoke and Drewry semi-trailers, then in use with the Diamond T tractor unit. This new trailer was designed by the Fruehauf Trailer Company (based in Detroit, MI).[1] A new tractor unit was required, as this heavier trailer was more than the Diamond T could cope with.

The M26 tractor was designed by the San Francisco-based Knuckey Truck Company. When Knuckey's production capacity proved insufficient the Army awarded production to the Pacific Car & Foundry Co. of Seattle, Washington.

Designated TR-1 by Pacific Car, the 12-ton 6x6 M26 tractor was powered by a Type 440 240 bhp 6-cylinder gasoline engine developed exclusively for it by Hall-Scott (although also used to uprate the Diamond T). Some 2,100 Type 440s were built.[clarification needed] Baxter[1] notes "over 1,300" M26 and M26A1 being built.

Unusually, the tractor unit was fitted with both an armored cab and two winches with a combined pull of 60 tons.[1] The intention was that as well as hauling the tank transporter semi-trailer, the tractor unit could itself be used for battlefield light recovery work.

A later unarmored version of the M26 tractor was designated the M26A1. An experimental ballast tractor conversion was experimented with by the British FVPE[1]


The M26 entered service with the US Army in Europe in 1944-45.

U.S. Nomenclature[edit]

In the nomenclature system used by the U.S Army Ordnance Corps Supply Catalog this vehicle is referred as the G160.


  • Crew-7
  • Armament 1-.50 cal. machine gun
  • Armor, front-3/4", sides, rear, 1/4".
  • top speed-26 MPH
  • fuel cap, 120 GAL.


M911 tractor and M747 trailer with M60 Patton tank

Prior to 1993, the U.S. Army employed the Commercial Heavy Equipment Transporter (C-HET), which consists of either the M746 or the M911 truck tractor, with the M747 semitrailer. The M746 was a 22 1/2 ton tractor built by Ward LaFrance from 1975 to 1977. About 125-185 of these tractors were built. They were superseded after 1977 by the Oshkosh M911 [Oshkosh Corporation]] of Oshkosh, Wisconsin.[2] During Operations Desert Shield and Desert Storm the M911 vehicles were employed primarily to haul M1 Abrams tanks. However, they demonstrated poor durability when loads exceeded 60 tons. Some are still serving as heavy transports of other military equipment, such as cargo handling equipment.

General Characteristics[edit]

M911 tractor M746 tractor M747 trailer
Length: 30 feet 27 feet 48.2 feet
Width: 9.5 feet 10 feet 11.5 feet
Height: 11.8 feet 10 feet 6.8 feet
Weight: 26.3 tons 25.8 tons 17.1 tons
Speed: 43 miles per hour 38 miles per hour N/A
Range: 614 miles 200 miles N/A
Crew: 2 2 N/A
Engine: 430 hp Detroit Diesel Series 92 (8V92TA) 12 cyl Detroit Diesel 12V71T, 600bhp @ 2500 rpm
Transmission: 5-speed automatic N/A


See also[edit]

External links[edit]


  1. ^ a b c d Baxter, Brian S. (1989). Breakdown: A History of Recovery Vehicles in the British Army. HMSO, for REME Museum. p. 51. ISBN 0-11-290456-4. 
  2. ^ "Fort Snelling Military Museum". Archived from the original on 2006-09-21. Retrieved 2006-11-15.