Mack MD


The Mack MD is a series of medium duty (Class 6 and 7) trucks to be built by Mack Trucks. It has a short, low-profile hood and a high-visibility cab. It is designed as straight trucks for local delivery, construction, and other vocational jobs. Introduced in February 2020 it is planned to enter full production in July 2020.

Mack MB
Production history
TypeMedium duty conventional cab
ManufacturerMack Trucks
BuiltTo start June 2020
Plant builtRoanoke Valley, VA
VariantsMD6, MD7
Weights
Weight class6, 7
Loaded weight29,995 and 33,000 lb (13,606 and 14,969 kg)
Dimensions
Bumper to
back of cab		103 in (2.62 m)
Drivetrain
Diesel engineCummins B6.7L
TransmissionAllison 6-speed
Chassis
Drive layout4x2

Design

The MD is a short-hood conventional. Designed for local use it has a day-cab only. It has two axles with the rear one driven. Total loaded weight can be up to 25,995 pounds (11,791 kg) for the MB6 and 33,000 pounds (15,000 kg) for the MD7.

Mack doesn't build any medium-duty components and uses a vendor engine, transmission, and axles.

Engine and transmission

A Cummins B6.7L diesel engine is used. It is a 6.7L turbocharged inline six-cylinder engine. It develops 220 to 300 horsepower (160 to 220 kW) and 560 to 660 pound force-feet (760 to 890 N⋅m) of torque.

An Allison 6-speed transmissions is used. They are fully automatic planetary gear transmission with a lock-up torque converter.

Chassis

A ladder frame with beam axles is used. Meritor supplies both the front and driven rear axles.

Applications

Mack is marketing the MD for local box van, stake/flatbed, dump, and tanker use.

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References

    "Mack Arttack: Truck Maker Is Back in Medium-Duty market". Heavy Duty Trucking. January 30, 2020. Retrieved February 3, 2020.

    "Mack launches medium-duty truck line, will invest $13 million in new manufacturing plant in Virginia". The Morning Call. January 30, 2020. Retrieved February 3, 2020.

    "Mack Trucks Launches Mack MD Series Medium-Duty Truck". Mack Trucks. January 30, 2020. Retrieved February 3, 2020.

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