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The M1120 LHS variant was initially introduced as part of the HEMTT overhaul/rebuild programme, during which returned M977 Cargo variants have their cargo bodies and materials handling cranes removed, to be replaced by a Multilift Mark 5 (now designated MPH165-LHS) load handling system, as fitted to the Oshkosh PLS truck.
The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg) tactical truck. [2] The M977 HEMTT first entered service in 1982 with the United States Army as a replacement for the M520 Goer, and since that date has remained in production for the U.S. Army and other nations.
The Palletized Load System (PLS) is a truck-based logistics system that entered service in the United States Army in 1993. It performs long and short distance freight transport, unit resupply, and other missions in the tactical environment to support modernized and highly mobile combat units.
M1120 HEMTT Load Handling System (LHS) M1121 HMMWV 4 × 4 self-propelled TOW missile launcher; M1123 HMMWV 4 × 4 utility vehicle, M1124; M1125; M1126 ICV version of the Stryker; M1127 RV version of the Stryker; M1128 MGS version of the Stryker; M1129 MC version of the Stryker; M1130 CV version of the Stryker; M1131 FSV version of the Stryker ...
A conventional ladder frame has a front steering axle with a 12,000 lb (5,400 kg) weight rating and tandem rear axles with a 40,000 lb (18,000 kg) weight rating. The truck can have a maximum weight of 52,000 lb (24,000 kg), including a 30,000 lb (14,000 kg) load. The total weight rating of the truck and trailer is 105,000 lb (48,000 kg).
The primary purpose of this combination for the U.S. Army is the transport of the M1 Abrams tank. They come in A0, A1, and M1300 configurations. The M1070 is coupled to a DRS Technologies M1000 semi-trailer. The M1300 is a U.S. Army Europe-specific derivative designed to be road legal within Europe and operates with a different trailer. [7]
The safety of the M939 series of trucks has been criticized, especially braking performance and stability when loaded. In 1999 the U.S. Army began retrofitting anti-lock brake systems to the M939 trucks. [24] Until the trucks were modified, they were limited to a 40 mph (65 km/h) top speed by an Army-wide safety order. [citation needed]
The -A2 had the army standard design LDS-465-1 multifuel engine built by Continental. It was a 175 horsepower (130 kW) 478 cu in (7.8 L) turbocharged inline 6 cylinder multifuel engine. Using M.A.N. technology it was a diesel type that could also use other fuel oils or a gasoline/oil mix in an emergency.