Medium Tactical Vehicle Replacement

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Medium Tactical Vehicle Replacement (MTVR) or 7-Ton, is a six-wheel drive all-terrain vehicle being used by the United States Marine Corps and United States Navy.

An MK36 wrecker lift towing an MK23 at Camp Fallujah, Iraq, December 2004.

It is designed to replace the old M900 series of tactical trucks, and was first fielded in 1998, after the contract was awarded to Oshkosh Truck Corporation. The MTVR comes in several variants, those being short bed, long bed, dump truck, and wrecker. The LHS variant (Load Handling System) is capable of self-loading standard containers and is currently being tested by General Support Maintenance Company, 4th Maintenance Battalion, 4th Marine Logistics Group. A fifth-wheel tractor (MK31) has also been developed, and is utilized to tow Marine Corps refueling assets.

The MTVR is commonly known as the '7-Ton'. It is a misconception that this is because it weighs seven tons. In fact, it is so called because its maximum payload capacity offroad is 7.1 tons. The MTVR can also carry 15 tons onroad and is the prime mover for the M777 howitzer.

1 Variants
2 Features
3 Military Occupational Specialties
4 See Also
5 Notes
6 External links

[edit] Variants

There are nine variations^[1] of the 7-ton MTVR:

The MK36 wrecker at Camp Foster, Okinawa, 18 March 2005.

MK23 Cargo, standard wheelbase, w/o Self-Recovery Winch
MK25 Cargo, standard wheelbase, w/ Self-Recovery Winch
MK27 Cargo, extra-long wheelbase, w/o Self-Recovery Winch
MK28 Cargo, extra-long wheelbase, w/ Self Recovery Winch
MK29 Dump, standard wheelbase, w/o Self-Recovery Winch
MK30 Dump, standard wheelbase, w/ Self-Recovery Winch
MK31 Tractor, standard wheelbase (all-wheel steering)
MK36 Wrecker, extra-long wheelbase
MK37 HIMARS Resupply Vehicle, extra-long wheelbase

Standard wheelbase is 15.3 feet; extra-long wheelbase is 18 feet.

[edit] Features

All MTVR's are equipped with a Central Tire Inflation System (CTIS). This allows the operator to select tire inflation pressures in accordance to vehicle payload and terrain type.
Longbed MTVR's are capable of hauling a 1 TEU sized Shipping Container.
MK 23 through MK 29 MTVR models have stowable dropsides. This allows for flexibility in moving cargo and troops.
All models feature a built-in turret stand and roof opening for operating vehicle-mounted weapons.

[edit] Military Occupational Specialties

United States Marine Corps
Operation and 1st Echelon Maintenance of the MTVR and HMMWV fall under the 3531 MOS Part of the larger 3500 series of MOS concerned with Motor Transport. Marines are sent to the Motor Transport Instruction Company (MTIC), part of Marine Detachment, Fort Leonard Wood, Missouri, for education and training on the vehicles. A '3531' constitutes a basic Motor Transport Operator.

United States Navy
MTVR's are operated primarily by sailors in Naval Mobile Construction Battalions with an EO (Equipment Operator) rating. Maintenance is the responsibility of Construction Mechanics (CM).