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. The MD was introduced in February 2020 entered full production in July 2020.
| Mack MD | |
|---|---|
 Mack MD at TEC Equipment in Portland, OR | |
| Production history | |
| Type | Medium duty conventional cab |
| Manufacturer | Mack Trucks |
| Built | To start June 2020 |
| Plant built | Salem, Virginia |
| Variants | MD6, MD7 |
| Weights | |
| Weight class | 6, 7 |
| Loaded weight | 29,995 and 33,000 lb (13,606 and 14,969 kg) |
| Dimensions | |
| Bumper to back of cab | 103 in (2.62 m) |
| Drivetrain | |
| Diesel engine | Cummins B6.7L |
| Transmission | Allison 6-speed |
| Chassis | |
| Drive layout | 4x2 |
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.
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.