Here is a cool pic of one....
This link goes to a site that explains the use of this family of trucks.
Mission
Provide transport capabilities for re-supply of combat vehicles and weapons systems.
Entered Army Service
1982
Description and Specifications
There are five basic configurations of the HEMTT series trucks: M977 cargo truck with Materiel Handling Crane, M978 2500 gallon fuel tanker, M985
cargo truck with Materiel Handling Crane, M983 tractor and the M984 wrecker. A self-recovery winch is also available on certain models. This vehicle
family is rapidly deployable and is designed to operate in any climatic condition where military operations are expected to occur. The HEMTT is the
backbone of U.S. Army logistics. Standard features include front and rear tow eyes, blackout lights, 24-volt electrical system, and rear pintle hook
for towing trailers and artillery. All models are C130, C141 and C17 air transportable and are capable of fording water crossings up to 48 inches
deep.
The HEMTT Load Handling System (LHS) consists of a standard HEMTT (M977/M978 or M985 chassis) prime mover (8 x 8 foot configuration) equipped with an
integral load-handing system providing self-load/unload capability and capable of transporting an 11-ton payload. LHS carries
equipment/ammunition/supply loads on demountable “flatrack” cargo beds and is able to tow an 11-ton payload trailer also capable of carrying
flatracks. The containerized roll-in/out platform (CROP), an A-frame type flatrack that fits inside a 20-foot International Standards Organization
container, gives the HEMTT LHS added cargo carrying capability. Flatracks and CROPs are interchangeable between HEMTT LHS and the Palletized Load
System.
M977 M978 M985 M983 M984
Length: 401 in 401 in 401 in 351 in 392 in
Height: Operational 112 in; Transport 102 in - all
Width: 96 in 96 in 96 in 96 in 96 in
Wheelbase: 210 in 210 in 210 in 181 in 191 in
Turning circle: 100 in 100 in 100 in 91 in 95 in
Ground clearance: 24 in 24 in 24 in 24 in 24 in
Vehicle curb weight: M977 w/ winch - 38,800 lbs; w/o winch - 37,900 lbs
M978 w/ winch - 38,200 lbs; w/o winch - 37,300 lbs
M983 w/ crane - 39,200 lbs; w/o crane - 32,200 lbs
M984 - 50,900 lbs
M985 w/ winch - 39,600 lbs; w/o winch - 38,700 lbs
Max speed: 57 mph 57 mph 57 mph 57 mph 57 mph
Cruising range: 300 mi 300 mi 300 mi 300 mi 300 mi
Maximum grade: 60% with payload of 22,000 lbs
Engine: 445 or 450 horsepower diesel engine
Transmission: 4-speed automatic and 2-speed Oshkosh transfer case with air-operated front tandem axle disconnect
Crew: 2
Manufacturer
Oshkosh Truck (Oshkosh, WI)
Basic info from link if it doesn't work for you. Works fine for me.
