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The first LVSRs were ordered in 2006. The LVSR is the USMC's equivalent of the U.S. Army’s Heavy Expanded Mobility Tactical Truck (HEMTT) and Palletized Load System (PLS). The Marines do not use the HEMTT or PLS [4] and the Army does not use the LVSR, but both services use a common trailer (M1076) with all three truck types.
In 1949 the US Army set a requirement for a family of extra heavy-duty 10‑ton (9,072 kg) load rated, off-road, 6x6 tactical trucks. Mack's design, influenced by their WWII era NO (7 + 1 ⁄ 2-ton, 6x6 truck), was chosen. Designed as an entire family of trucks, only the semi-tractor and cargo/prime mover were built. 392 M123 were built between ...
In 1950 the next generation of tactical trucks were being developed. Sizes were rationalized, with 1 ⁄ 4 and 3 ⁄ 4-ton 4x4s and 2 + 1 ⁄ 2, 5, and 10-ton 6x6s. Trucks were military standard designs, 6x6 trucks used common cabs and similar fender and hood styles. [14]
The M1120 HEMTT LHS (Load Handling System) is a M977 Heavy Expanded Mobility Tactical Truck with a load handling system in place of a flat bed/cargo body. The HEMTT is an eight-wheel drive, diesel-powered, tactical truck used by the US military and others.
The base designation identifies permissible gross vehicle weight and engine power output, the latter figure rounded to the nearest 10 hp (7.457 kW). For example, the HX range model 18.330 has a technically permissible gross vehicle weight rating of 18,000 kg and an engine power output of 326 hp (243 kW).
The 2.5-ton (4×4) FMTV is designated as the Light Medium Tactical Vehicle (LMTV). The 5-ton (6×6) is designated the Medium Tactical Vehicle (MTV). [6] The FMTV is based on the Austrian Steyr 12 M 18 (4×4) truck, but has been localized to meet a minimum of 50% US content. The original 15 FMTV prototypes were assembled in Austria.
As with other military vehicles, the CUCVs used a 24-volt electrical system. It was actually a hybrid 12/24-volt system that used 24-volts under the hood for the starter, volt meter, diesel engine glow plug circuit along with the mandatory NATO slave receptacle for jump starting any 24 volt NATO vehicle, and hookups for military radios.
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.