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Mack NM 6-ton 6x6 truck

From Wikipedia, the free encyclopedia

Mack Model NM
Mack NM.2.jpg
Mack NM-3
Type6-ton 6x6 Prime mover
Production history
DesignerMack
ManufacturerMack
Produced1940-1944
No. built8,400+ (all models)
Specifications (NM3[1])
Mass22,659 lb (10,278 kg)
Length23 ft 4 in (7.11 m)
Width8 ft (2.44 m)
Height9 ft 11 in (3.02 m)

EngineMack EY
Transmission5 speed x 2 range trf. case
SuspensionLive beam axles on leaf springs
Operational
range
280 mi (450.6 km)
Maximum speed 34 mph (55 km/h)

The Mack NM 6-ton 6x6 truck, officially "Prime Mover Cargo truck (G-535)", 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:
* 23 feet 4 inches (7.11 m) long
* 8 feet (2.44 m) wide
* 9 feet 11 inches (3.02 m) tall
Weight: 21,750 lb (9,870 kg)
Engine: Mack EY 707 cu in (11.6 L) ohv inline 6 cyl. gasoline engine with 170 hp (130 kW) at 2100.
Gearbox: Mack TR36 5-speed direct-top
Transfer Case: Timken-Detroit 2-speed T77 with 2.55 low
Wheelbase: 14 feet 9 inches (4.50 m)
Tires 9.75-22 (NM-1, -2, -3 Lee commercial with highway tread)

Models

The NM-1 and NM-2 had an amidships mounted winch with a capstan head. It had a short steel cargo body 11 feet (3.35 m) long and 7 feet 4 inches (2.24 m) 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 (front pintle under the arche), 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 (cable operated) of the air brakes of the truck and the mechanical brakes of the gun.

Gallery

See also

References

Notes

  1. ^ "TM-9-2800-1 Military Vehicles". US Dept. of the Army. Feb 1953. p. 271. Retrieved 30 Dec 2014.

Bibliography

  • Vanderveen, Bart (1998). A Record of Military Macks in the Services and Beyond. Battle of Britain Intl. ISBN 9781870067096.
  • Crismon, Fred W (2001). US Military Wheeled Vehicles (3 ed.). Victory WWII Pub. pp. 363–365. ISBN 0-970056-71-0.
  • Doyle, David (2003). Standard catalog of U.S. Military Vehicles. Kraus Publications. pp. 205–207. ISBN 0-87349-508-X.
  • TM 10-1476
  • SNL G-535


This page was last edited on 31 July 2019, at 09:44
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