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Medium Tactical Vehicle Replacement (MTVR) 7 ton 6x6

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US Navy & USMC Medium Tactical Vehicle Replacement (MTVR) 7 ton 6x6

Beginning in 2001, the U.S. Navy and Marine Corps Medium Tactical Vehicle Replacement (MTVR) program superseded the M-939 and M-809 5-ton trucks with a fleet of state-of-the art, commercially based, medium trucks with greater mobility, lift, and reliability. The MTVR has an increased payload of 7.1 tons cross-country and 15 tons on hard surface roads and can simultaneously tow an 11 ton load. The MTVR has a 70 percent off road and 30 percent on road mission profile and is capable of sustained speeds of 30 mph cross-country.

The USMC Medium Tactical Vehicle Replacement (MTVR) Cargo Trailer (MK105) and Water Trailer (MK149) are matched to the MTVR truck.

Commercial components include:

  • 425 horse power electronically controlled engine
  • seven speed, continuous power, automatic transmission
  • 6-wheel independent suspension
  • anti-lock brakes
  • engine retarder (“jake brake”)
  • automatic traction control
  • central tire inflation system

MTVR Series of Vehicles

The self-recovery winch is rated at 20,000 lbs. for all MTVR models.

Find additional photos and hi-res versions of the Medium Tactical Vehicle Replacement (MTVR) at the Olive-Drab Military Mashup:

Marines from the 1st Marine Division, Command Operation Center, line their MTVR  7-ton trucks and High-Mobility Multipurpose Wheeled Vehicles (HMMWV) in a convoy as part of familiarization training at Camp Matilda, Kuwait, 24 February 2003, during Operation ENDURING FREEDOM.
US Navy Seabees assigned to Alpha Company, Naval Mobile Construction Battalion 74 and Alpha Company, NMCB-7 inspect a Medium Tactical Vehicle Replacement tractor (Tractor, MK31 MTVR) and flatbed trailer for the Battalion Equipment Evaluation Program (BEEP) at Camp Mitchell, Rota, Spain, 11 December 2010.  Trailer appears to be civilian, similar to M871.
Combat Logistics Regiment 3, 3rd Marine Logistics Group, stages the equipment offloaded from the S.S. Maj. Stephen W. Pless, a U.S. Navy Military Sealift Command Maritime Prepositioning ship, part of preparations for Exercise Cobra Gold 2009, Laem Cha Bang, Thailand, 28 Jan 2009.  The vehicles and equipment were then transported by tractor-trailer to the Arrival Assembly Operations Echelon to undergo limited technical inspection and scanning before being distributed to subordinate commands.  Vehicles include MTVR and LVS.
High Mobility Artillery Rocket System (HIMARS), Resupply Vehicle (RSV) and Re-supply trailer (RST). USMC MTVR Program Office developed the RSV based on the Medium Tactical Vehicle Replacement (MTVR) 7 ton 6x6 and the standard FMTV M1095 5-ton trailer is used for the RST.
US Marine from Marine Wing Support Squadron 371, Crash Fire and Rescue, places a tow strap on the tail of a US Army UH-1 Huey helicopter that they were training to recover, so the aircraft would be stable when lifted by the USMC MK36 Medium Tactical Vehicle Replacement (MTVR) Wrecker at K-9 Village, Yuma Proving Ground, AZ, 9 Oct 2010.
US Navy Machinery Repairman 2nd Class Daniel Hartley, assigned to Naval Mobile Construction Battalion 7, helps the driver of an Mk31 medium tactical vehicle replacement (MTVR) tractor back up at the storage yard in Camp Mitchell, Rota, Spain, 26 February 2010.

MTVR Armor System (MAS)

MK23 MTVR with MTVR Armor System (MAS)
MK23 MTVR with MTVR Armor System (MAS).

Experience in Iraq generated the need to armor the MTVR vehicles. The MTVR Armor System (MAS) is designed specifically for the Medium Tactical Vehicle Replacement (MTVR) vehicles and was developed through the Engineering Change Proposal (ECP) process. The kit provides complete 360-degree protection as well as overhead and underbody protection for the crew compartment utilizing Mil-A-46100 High Hard Steel and Metal Composite. The MAS is intended as a permanent modification to the vehicle, and includes an upgraded front suspension and cab rebuild. The kit includes a removable personnel carrier (with ballistic glass), air conditioning system, and machine gun mount. Each MAS kit for sn MTVR variant is specific to that vehicle. MAS is also produced in reducible or non-reducible models to meet all mission requirements. The MTVR Dump Truck and MTVR Tractor MAS Variants began fielding in December 2006.

To accept the armor kit, the standard MVTR requires modifications. After such modifications, the suffix "A1" is added to the model number, e.g. MK31A1. Modified vehicles are referred to as “ready to accept armor” (RTAA).

When armored, the prefix "A" is added to the model number, e.g. AMK31 Tractor.

Medium Tactical Vehicle Replacement (MTVR) Photo Gallery

Convoy of MK23 MTVR trucks from Battery F, Battalion Landing Team, 2nd Battalion, 2nd Marines, 24th MEU SOC, Iraq, 31 March 2003
Convoy of MK23 MTVR trucks from Battery F, Battalion Landing Team, 2nd Battalion, 2nd Marines, 24th MEU SOC, Iraq, 31 March 2003. Mark 19 Mod 3, 40mm grenade machine gun is mounted on top, and the truck is towing a M198 155mm howitzer.

MK23 MTVR from 24th Marine Service Support Group, Transportation Support Detachment, with a M-2 HB .50 Caliber machine gun, Al Rifa, Iraq, 17 April 2003.
MK23 MTVR from 24th Marine Service Support Group, Transportation Support Detachment, with a M-2 HB .50 Caliber machine gun, Al Rifa, Iraq, 17 April 2003.

MK23 MTVR with 2nd Battalion, 11th Marine Regiment, during Convoy Operations training, 29 Palms, CA, 24 April 2004.
MK23 MTVR with 2nd Battalion, 11th Marine Regiment, during Convoy Operations training, 29 Palms, CA, 24 April 2004.

MK23 MTVR with 3rd Battalion, 8th Marines (3/8), India Company, 3rd Squad, Al Anbar Province, Iraq, 20 April 2005
MK23 MTVR with 3rd Battalion, 8th Marines (3/8), India Company, 3rd Squad, Al Anbar Province, Iraq, 20 April 2005. The vehicle is configured with Medium Armor and using an MK 19 Mod 3 40 mm grenade machine gun system on the cab turret.

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