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Today in WW II: 20 Sep 1943 Parse error: syntax error, unexpected T_NS_SEPARATOR in /big/dom/xolive_drab/www/od2/od2_support_functions.php(226) : eval()'d code on line 1.   

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:

Rear view of the Mack NO 7 1/2-ton 6x6 artillery prime mover, circa 1943.
Rear view of the Mack NO 7 1/2-ton 6x6 artillery prime mover, circa 1943.
155mm Long Tom gun, named Cadet, with Mack NO 7 1/2-ton prime mover 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.
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 6x6 Prime Mover,  Wt. 28,700, USA #522359. Photo taken at Inbound Park, Norfolk Army Base, Hampton Roads Port of Embarkation (HRPE), Norfolk, VA, 3 Aug 1943.  Wt. 28,700, Force 2404-F, USA #522359.
Mack NJU-1 Ponton 5 to 6-ton 4x4 tractor with bridging equipment on trailer, for a bridge over the Pee Dee River during 1st Army maneuvers in the Carolinas, 15 November 1941. Chevrolet Truck, Carryall, 1/2 Ton, 4x2 at the roadside.

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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