To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

Mack NJU 5-ton 4x4 truck

From Wikipedia, the free encyclopedia

Truck Tractor, Ponton, C. O. E., 5-6 ton, 4x4
(Mack Model NJU-1)
Mack NJU-12.tif
Mack NJU-1 Ponton tractor
Type5- to 6-ton 4x4 semi-tractor
Place of originUnited States
Production history
ManufacturerMack Trucks
No. built692 (+8 NJU-2)
Specifications (NJU-1[1])
Mass16,580 lb (7,520 kg)
Length19 ft 9 in (6.02 m)
Width8 ft (2.44 m)
Height9 ft 6 in (2.90 m)

EngineMack EN532
136 hp (101 kW)
Transmission5 speed x 2 range trf case
SuspensionLive axles on leaf springs

The Mack NJU 5- to 6-ton 4x4 Ponton tractor (G639) was a semi-tractor designed to haul bridging equipment during World War II. Of the 700 built 119 were supplied to the British in Egypt, 8 were built with van bodies, and the rest were used as a substitute standard by the US Army.


In 1940 the US Army ordered 700 Mack 4 x 4 truck tractors, intended to tow pontoon-carrying semi-trailers. 694 were delivered in 1941 and the last 6 in 1942. An Autocar design was standardized by the US Army and only 700 NJUs were built.

692 NJU-1 tractors and 8 NJU-2 vans designed to tow topographical trailers were delivered.

In November 1941 119 semi-tractors were delivered to the British army in Egypt, where they bore War Department H-numbers.

Some NJU-1's went into French Army service post war.[2]


Mack NJU-1
Mack NJU-1

The design was a militarized version of a civilian Cab Over Engine (COE) model, partly redesigned to make it 4WD. A Mack engine and transmission were matched with a Timken 2-speed transfer case and double-reduction axles. The EN532 engine was a 532 cu in (8.7 L) L-head inline 6 cylinder gasoline engine developing 136 hp (101 kW) at 2500 rpm. The 5-speed transmission drove the separate transfer case.[3]

A ladder frame had two live beam axles on leaf springs with a 155 inches (3.94 m) wheelbase. There was a 15,000 pounds (6,800 kg) winch behind the front bumper and a pintle hitch at the rear. A civilian type closed cab was used, right behind the cab was an open cargo box used to carry engineer tools, outboard motors, and other equipment.

Early semi-tractors and all vans used 9.75x20 tires, later semi-tractors had 12.00x20 tires. All trucks had dual rear tires. All trucks had full-air brakes.[4]



  1. ^ Doyle, David (2011). Standard Catalog of U.S. Military Vehicles (2nd Edition). Krause Publications. p. 174. ISBN 0-87349-508-X.
  2. ^ Vanderveen, Bart (1998). A record of military Macks in the Services and beyond. After the Battle. pp. 41–42. ISBN 1-870067-09-6.
  3. ^ Crismon, Fred W (2001). US Military Wheeled Vehicles (3 ed.). Victory WWII Pub. p. 285. ISBN 0-970056-71-0.
  4. ^ Vanderveen (1998).

External links

This page was last edited on 16 April 2019, at 07:09
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.