Line Haul Tractor
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DESCRIPTION

The M915A3 and M915A5 Line Haul Tractor Trucks serve as the prime movers for semi-trailers with a Gross Combined Vehicle Weight up to 105,000 pounds and 120,000 pounds respectively, with semi-trailers weighing up to 86,000 pounds. They are used to transport bulk cargo, containers and bulk liquids (petroleum/water) from ports to forward areas. The predecessor Line Haul system is the M915A3, which was fielded in unarmored and armored (Generation III Add-on Armor) configurations. Block upgrades, to include up armor, were made to the M915A3 through Engineering Change Proposals to meet the requirement for the Long Term Armor Strategy A-cab and B-kit armor protection, without reducing mission capability, and which became the M915A5.

The M915A3 and M915A5 are a critical part of the theater distribution system. The M915A3 and M915A5 support missions through the full spectrum of military operations from peacetime to major combat operations. The Line Haul tractors operate primarily in the theater area, but can deliver cargo as far forward as the road network allows. They can operate worldwide principally on primary and secondary roads, and off-road when necessary or feasible. Vehicle operations include around-the-clock, all weather use in hot, basic and cold climates. The M915A3 and M915A5 can be transported on C-5 and C-17 aircraft and meet all applicable North Atlantic Treaty Organization interoperability criteria.

BENEFIT TO THE SOLDIER

Through employment of truck transportation organizations, including organic, host nation and contracted assets, the Army Transportation Corps is the single largest provider of land surface movement capability to the joint force. Line Haul Operations are capable of supporting Full Spectrum Operations, from Major Combat Operations, Stability Operations and Civil Support and therefore must have high reliability and be capable of protecting operators and crews from various threats. As the M915A3 and M915A5 serve as the prime movers for semi-trailers and are used to transport bulk cargo, containers and bulk liquids (petroleum/water) from ports to forward areas, they are the backbone to the Army Transportation Corps.

The M915A3 and M915A5 Line Haul Tractor Trucks fulfill the Army requirement for heavy haulers. The M915A5 offers the latest vehicle safety and crew comfort, increased crew protection, improved range and fuel efficiency, and has better reliability due to onboard diagnostics.

SPECIFICATIONS

Line Haul Tractor Truck (M915A5):

  • Size: 6×4 semi-tractor with sliding non-lubricated fifth wheel (2-inch kingpin)
  • Gross Combination Weight Rating (GCWR) (maximum allowable weight of the loaded semi-tractor and its attached loaded trailer determined by the tractor manufacturer): 120,000 pounds
  • Engine: Detroit Diesel S60 (500 horsepower, 1,650 foot-pounds torque, Detroit Diesel Electronic Control (DDEC) IV engine controller)
  • Transmission: Allison HD4500SP (6-speed automatic)
  • 100 percent more Electrical Power Reserve (power headroom)
  • Improved Anti-lock Brake System (ABS)
  • Rollover Stability Control System
  • Tilt/Telescoping Steering
  • Collision Warning System Eaton VORAD
  • LED Headlights
  • High-efficiency air conditioning
  • Maximum towing speed: 65 mph with full payload on flat terrain

Line Haul Tractor Truck (M915A3):

  • Size: 6×4 semi-tractor with semi-lubricated fifth wheel (2-inch kingpin)
  • GCWR: 105,000 pounds
  • Engine: Detroit Diesel S60 (430 horsepower, 1,450 foot-pounds torque, DDEC IV engine controller)
  • Transmission: Allison HD5460P (6-speed automatic) with power take-off
  • ABS
  • Collision Warning System Eaton VORAD
  • Air conditioning
  • Maximum towing speed: 65 mph with full payload on flat terrain

PROGRAM STATUS

FY16-FY18:

  • M915A5 truck production completed and transitioned to Sustainment (Integrated Logistics Support Center, U.S. Tank-automotive and Armaments Command, Michigan).
  • M915A5 Armor contract continues to produce armor through 3QFY19 to meet the Tactical Wheeled Vehicle (TWV) strategy to procure and maintain armor kits for greater than or equal to 30 percent of the TWV fleet size and meet Headquarters, Department of the Army G-8 needs. The next armor solicitation for contract award is currently being developed.

PROJECTED ACTIVITIES

  • FY18-FY19: Continued divestment of older M915 variants (A0, A1, A2 and A4). The M915A3 and M915A5 will continue to augment or replace assets in the current aging line haul fleet of legacy M915, M915A1, M915A2 and M915A4 series tractors and will allow insertion of improved technologies within the Active Army, Reserve and National Guard components.
  • FY19-FY23: Next armor contract strategy is being developed for Make or Buy decision. However, regardless of manufacturer, the B-Kits will be produced and shipped to Army Prepositioned Stock locations for installation as well as placed in long-term storage under U.S. Army Materiel Command Operational Projects.

Contractors

  • Prime: Daimler Trucks North America LLC/Freightliner (Portland, OR and Cleveland, NC)
  • Engine: Detroit Diesel (Detroit, MI)
  • ABS Brakes: Meritor (Troy, MI)