As described in TM 9-2320-279-10-1, the HEMTT M977 is a cargo vehicle with 62,000-lb (28 100 kg) GVWR and 100,000-lb (45 400 kg) GCWR. Vehicle is equipped with material handling crane with 2500-lb (1 135 kg) load capacity at 19 ft (5.8 m) boom radius and has 18-foot cargo body.
The M977 HEMTT is similar to the M985 HEMTT Cargo Truck but with lighter load rating for the truck and its material handling crane.
The NSNs for the HEMTT M977 variants are:
M977 NSN 2320-01-097-0260 w/winch
M977 NSN 2320-01-099-6426 w/o winch
M977A2 NSN 2320-01-493-3774
M977A2R1 NSN 2320-01-493-3782
Some documents refer to M977A1 but it is not clear if that variant was produced.
Soldiers from Headquarters Co., 4th Bn., 64th Armor, 24th Inf. Div. (Mechanized) use the cargo-handling crane at the rear of an M-977 HEMTT to unload pallets of ammunition for the M1A1 Abrams tanks of 1st Battalion, 64th Armor, as they prepare to deploy to Saudi Arabia for Operation Desert Shield from Ft. Stewart, GA, 9 August 1990.
M-977 HEMTT truck being prepared for redeployment to the United States following Operation Desert Storm, 17 June 1991. M1A1 Abrams tanks in the background.
M977 HEMTT with a convoy on a desert road in the Persian Gulf region, April 1992.
Loading mine plows for the M1A1 Abrams tank onto an M977 HEMTT truck, Kuwait, 27 October 1994.
Minnesota Army National Guard M977 HEMTT bringing sand bags and volunteers to assist with flood conditions on the Red River, Highway 75 toward Halstad, MN, 4 April 2006.