Medium Tactical Vehicle Replacement
| MTVR | |
|---|---|
MTVR MK23 standard cargo trucks with Armor Protection Kits (APKs) and armored rear troop carrier compartments
|
|
| Type | Family of 6x6 tactical trucks with 7-ton payload (U.S. tons) |
| Place of origin | United States |
| Service history | |
| In service | 2001–present (first fielding 2001) |
| Used by | U.S. Marines and others (see Operators) |
| Production history | |
| Designer | Oshkosh Defense |
| Designed | 1996 (initial development contract) |
| Manufacturer | Oshkosh Defense |
| Produced | 1999–present |
| Number built | 11,350 (est.) U.S. Marines/Navy plus 430 (est.) export sales |
| Variants |
(full details in main text)
|
| MK23 standard cargo truck | |
|---|---|
| Specifications | |
| Weight | 12,610 lbs (curb w/fuel); 14,199 lbs/30,000 lbs (payload off-road/primary & secondary roads) |
| Length | 7.998 m |
| Width | 2.49 m |
| Height | 3.18 m (cab; reducible for transport) |
| Crew | 2 |
|
|
|
| Armor | a-kit/b-kit; U.S. Army Long Term Armor Strategy (LTAS) compliant |
| Engine | Caterpillar (CAT) C-12 Advanced Diesel Engine Management (ADEM) III, 11.9-liter, 6-cylinder inline water-cooled diesel developing 425 hp @ 1800 rpm and 2101 Nm torque at 2100 rpm |
| Payload capacity | rated at 7 U.S. tons (off-highway) |
| Transmission | Allison HD 4070P 7-speed automatic and Oshkosh 30000 single-speed with torque proportioning differential and manual differential lock |
| Suspension | Oshkosh TAK-4 independent suspension, coil spring upper/lower control arms; anti-roll bar on second and third axles. Front axle rated at 7,257 kg, second at 10,659 kg, third at 11,567 kg |
| Fuel capacity | 295 litres |
|
Operational
range |
483 km |
| Speed | 105 km/h |
|
Steering
system |
Power-assisted, front axle (third axle contra-steer on MK31 tractor) |
(full details in main text)
The Medium Tactical Vehicle Replacement (MTVR) is a series of vehicles, based on a common chassis that vary by payload and mission requirements. The MTVR is a purpose-designed military vehicle, although a small number of vehicles have been sold commercially for specialized operations such as wildfire fighting.
There were originally four MTVR variants, this increasing to seven, and then nine variants (plus a sub-variant) as deliveries and development continued. A dedicated trailer and prototype/developmental MTVRs have also been produced.
The first MTVRs were delivered in late 1999. The MTVR is the U.S. Marines’ equivalent of the U.S. Army’s Family of Medium Tactical Vehicles (FMTV). The Marines do not use the FMTV; the Army does not use the MTVR. The MTVR was designed and is manufactured by Oshkosh Defense.
The MTVR has its design origins in two U.S. military programs, the 5 ton Tactical Truck Replacement (5TTR) for the U.S. Army, and the Medium Tactical Vehicle Replacement (MTVR) for the U.S. Marines. The aim of these programs was to upgrade and extend the service life of around 3,400 U.S. Army M939 series 5 ton trucks, and 8,100 U.S. Marines M809 and M939 series 5 ton trucks. Prototype and development contracts for both programs were awarded in 1996. The 5TTR program was subsequently halted, and the MTVR program evolved from an upgrade to a new-build requirement.
Oshkosh was awarded a multi-year MTVR production contract in February 1999. The first vehicles were scheduled for delivery by the end of 1999, and deliveries under the initial contract concluded during August 2005. The award initially allowed for up to 8,168 MTVRs (including options for 2,502) in four variants (MK23, MK25, MK27, MK28) to be ordered over five program years; 6,931 MTVRs were delivered, 6,393 to the Marines and 538 to the Navy (Seabees). The first MTVRs were fielded in July 2001. Three additional variants followed, the MK29, MK30 and MK36.
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