Mack NM 6-ton 6x6 truck


The Mack NM 6-ton 6x6 truck, officially "Prime Mover Cargo truck ", was Mack's first military 6x6. It debuted as a prime mover in 1940, and was used for towing AA guns, and ammunition. Gun crews rode in its canvas covered bed. The NM's enclosed cab came from the commercial L-model. Many NM's were used by the British as recovery vehicles.

Technical data

Overall Dimensions:
Weight:
Engine: Mack EY ohv inline 6 cyl. gasoline engine with Horsepower| at 2100.
Gearbox: Mack TR36 5-speed direct-top
Transfer Case: Timken-Detroit 2-speed T77 with 2.55 low
Wheelbase:
Tires 9.75-22

Models

The NM-1 and NM-2 had an amidships mounted winch with a capstan head. It had a short steel cargo body long and wide. The cargo body had troop seats, a canvas cover, and a spare wheel on the front right side. NM-2 had smaller head lamps and parking lamps on top.
The NM-3 was the last model to have an enclosed cab. It was similar to the NM-1 and NM-2 except for:
front pintle for positioning artillery pieces, arched bumper, smaller brush guard, side lights on mudguards, towing hooks on bumper deleted, radiator shell with Mack nameplate.
There was no NM-4, the prototype NN-2 did not go into production.
The NM-5 and NM-6 had a soft top cab with folding windscreen. It had a wooden cargo body with two spare tires at the front right and left. They had some technical detail changes. The only differences between the NM-5 and NM-6 were rifle brackets in the cab and jerrycan holders left of the winch for the NM-6.
NM-7 and NM-8 were like the NM-5 and NM-6. There were only minor detail modifications.
Some were equipped with the gun-carriage brake cylinder: this was an air-cylinder from Hanna for the simultaneous actuation of the air brakes of the truck and the mechanical brakes of the gun.

Gallery


File:Mack NM.2.jpg|Mack NM-2
File:Mack NM.jpg|Mack specifications