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M-746 Heavy Equipment Transporter (HET) Truck Tractor, 22 1/2-ton, 8x8, (G-903)

The M-746 Heavy Equipment Transporter (HET) is a Heavy duty vehicle intended mainly to evacuate a disabled main battle tank or other disabled vehicles of similar weight and dimensions. Its design is suitable for primary or alternate main supply routes or from vehicle collecting points or maintenance units. Secondary missions of the M746 include the transport of non-disabled tank vehicles over extended distances and general cargo missions. The M746 HET Truck Tractor commonly was paired with the M747 Semi-Trailer, Low Bed, Heavy Equipment Transporter, 60-ton.

After development by Chrysler, the M746 HET was manufactured by Ward LaFrance Truck Corporation from 1973-1977. Total production was less than 200 units. The M746 HET was replaced by the M911 Truck, Tractor, C-HET, 8x6.

The M-746 tractor vehicle is also capable of winching and towing operations. The cab accommodates a driver, assistant driver, and two additional crew.

To increase maneuverability of the M-746 8x8 tractor, the tandem front axles steer. The front and rear suspension are taper leaf-spring bogie type with shock absorbers and high-flotation tires.

Manuals for the M746 vehicle will be in the TM 9-2320-258-xx series, where the xx represents the maintenance level. The M746 tractor is identified by NSN 2320-00-089-7264.

Find additional photos and hi-res versions of the M-746 Truck Tractor at the Olive-Drab Military Mashup:

M746 Truck, Tractor: 22 1/2-ton, HET, 8x8, w/Dual Midship Winch. NSN 2320-00-089-7264. Manufactured by Ward LaFrance Truck Corporation from 1973-1977, total production less than 200. Used for heavy transport with the M747 semitrailer. Courtesy American Truck Historical Society forum
Truck-tractor, 22 1/2-ton, 8x8, M746. NSN 2320-00-089-7264.  Figure from TM 55-2320-258-14.
M746 Truck, Tractor: 22 1/2-ton, HET, 8x8, w/Dual Midship Winch.  NSN 2320-00-089-7264.  Manufactured by  Ward LaFrance Truck Corporation from 1973-1977, total production less than 200.  Used for heavy transport with the M747 semitrailer. Photo taken at the annual vintage vehicle event, Astle Park, Chelford, Cheshire, August 2005. Courtesy OldClassicCar.co.uk
M746 Truck, Tractor: 22 1/2-ton, HET, 8x8, w/Dual Midship Winch.  NSN 2320-00-089-7264.  Manufactured by  Ward LaFrance Truck Corporation from 1973-1977, total production less than 200.  Used for heavy transport with the M747 semitrailer.  Figure from TM 43-0001-31, June 1985.
M-746 Heavy Equipment Transporter (HET) Truck Tractor, 22 1/2-ton, 8x8 with M747 Semitrailer, carrying an M-60 Patton Main Battle Tank (MBT), circa 1973.

M-746 Heavy Equipment Transporter (HET) Truck Tractor Charactaristics

Tractor length324 in
Tractor width120 in
Tractor height130 in
Tractor curb weight45,000 lbs
Payload52,500 lbs
Engine12 cyl Detroit Diesel 12V71T, 600bhp @ 2500 rpm
Transmission5-speeds fwd, automatic
Drawbar pull52,200 lbs
Speed38.5 miles per hour w/trailer
Range200 mi
Fording40 in
Ground clearance11 in
Tire size18x22.5, 22 ply
Tractor ManufacturerXM746 by Chrysler for development; M746 by Ward LaFrance for production

Table data for M746 tractor from TM 9-2320-258-10.

M-746 Heavy Equipment Transporter (HET) Photo Gallery

M746 Truck, Tractor: 22 1/2-ton, HET, 8x8, w/Dual Midship Winch. Image from TM 43-0001-31, June 1985.
M746 Truck, Tractor: 22 1/2-ton, HET, 8x8, w/Dual Midship Winch. Image from TM 43-0001-31, June 1985.

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