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Mack NO 7 1/2 Ton 6x6 Truck (G-532)

The combat "N Series" were the first military 6x6 trucks by Mack. The Mack NO was designed as a prime mover for heavy artillery, with a soft top cab for a five man crew. The models NO-1 through NO-7, starting in 1943 with total production about 2000.

A Gar Wood 5MB 40,000 lb. winch was mounted in front and a hoist was mounted at the rear of the bed as a power assist for joining the gun trails of the towed artillery. The cargo body was made of wood.

The huge Mack NO 7 1/2 Ton 6x6 Truck (G532) weighed almost 30,000 lbs empty, could load another 10 tons and pull 25 tons. It was powered by the Mack EY 6 cyl. 707 cid engine with 159hp@2100rpm and 534ft-lb of torque at 800rpm. It had a 5 speed transmission mated to a two speed transfer case.

Manuals for this series of trucks include:

  • Parts List: ORD 9 G532
  • Operators Manual and Maintenance: TM 10-1679

Find additional photos and hi-res versions of the Mack NO 7 1/2 Ton 6x6 Truck at the Olive-Drab Military Mashup:

BGGEN John R. Kilpatrick, 0-167001, New York, NY, Port Commander, Hampton Roads Port of Embarkation (HRPE); RADM M. G. Slarrow, Supply Director in Command of Naval Supply Depot, Norfolk, VA; LTCOL Eugene S. Smith, 0-135404, Tuckahoe, NY, Director, Facilities and Supply Division, HRPE; and Mr. James C. MacKechnie, Norfolk, VA, Foreman, Fuel Department, are shown inspecting Craney Island Installations under the direction of LT William A. Horning, 0-339873, Frankfort, OH, Officer in charge of Reception Park and Tool Processing, Maintenance and Maintenance Supply Branch, Facilities and Supply Division, HRPE. On the right is T/SGT Guy L. Snyder, 33267994, Cannonsburg, PA, operating the time saving dipping process for five gallon gasoline cans, Craney Island, South Hampton Roads, VA, 25 October 1944.  Vehicle appears to be Chevrolet 1 1/2-ton 4x4.
Rear view of Mack NO 7 1/2-ton prime mover carrying gun supply and full crew of the 16th FA Brigade is shown ready to go into action on leaving for maneuvers, Camp Gruber, OK, 3 May 1943. 155mm Long Tom is in tow.
Rear view of the Mack NO 7 1/2-ton 6x6 artillery prime mover, circa 1943.
Rear view of Mack NO 7 1/2-ton prime mover carrying gun supply and full crew of the 16th FA Brigade is shown ready to go into action on leaving for maneuvers, Camp Gruber, OK, 3 May 1943. 155mm Long Tom is in tow.
Mack NO 7 1/2-ton artillery prime mover.
A CAT 10K ATFL is used to load test packages of newly-developed water blivets onto an aircraft service truck prior to being airdropped from a C-17 Globemaster aircraft, Camp MacKall, NC, 10 Nov 2011.

Thanks to Nico van Gaalen, Rijswijk, Holland, for help with this page.

Mack NO 7 1/2 Ton 6x6 Truck Photo Gallery

Mack NO 7 1/2 Ton 6x6 Truck (G532) with 155mm 'Long Tom' Towed Gun, 16th Field Artillery Brigade, March 1943
Mack NO 7 1/2 Ton 6x6 Truck (G532) with 155mm 'Long Tom' Towed Gun, 16th Field Artillery Brigade, March 1943.

Mack NO 7 1/2 Ton 6x6 Truck (G532) with M36 machine gun ring mount, Aberdeen Proving Grounds, MD, February 1944
Mack NO 7 1/2 Ton 6x6 Truck (G532) with M36 machine gun ring mount, Aberdeen Proving Grounds, MD, February 1944.

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