Table of contents

       
 Carrier tracks page 2    Page 1
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Carrier M.G. (Aust.) Instruction Book

(Notified in G.O.’s dated 31st July 1943)
Tracks are fitted so that the “tails” or shorter sides of the links are to the front on the section of track in contact with the ground.(See Figure 2)

Workshop Manual Carriers M.G., 2 pdr. And 3” Mortar (Aust.)

(Undated but appears to be the complimentary volume to the 1943 Instruction Book)

Tracks should be fitted so that the “tails” or shorter sides of the links are to the front, in relation to the vehicle, on that section of track in contact with the ground.  (See Figure 2)

Track Assembly

The 1943 Instruction Book describes the assembly of the links to form the track.

  1. The “tail” or shorter side of the link meshes with the front or longer side of the next link,……….
Fig 3
It can be seen in Figure 3 that to correctly fit the track assembly description, i.e. shorter side of the link meshes with the front or longer side, the “tails” must be to the rear for the longer side to be to the front.
The Mechanics of a Chain

The 1941 Mechanization Pamphlet describes the track as …links joined together into an endless chain by hardened steel hinge pins.

In simplistic terms a chain can be described as a series of individual links held together with pins.  The joined links then provide access spaces for the teeth of a drive sprocket to propel the track.  Now imagine a length of link chain.    When the two ends are pulled apart the chain is straightened but when the ends are pushed together the chain buckles.  Therefore a chain can only operate on a “pulling” force unless the following applies.

 

When a link chain is employed to operate a piece of machinery two or more sprockets are employed.  The primary sprocket is the chain drive sprocket that pulls the chain around itself thus enabling the chain to “pull” the secondary sprocket/s that operates the piece of machinery.  However in many instances both the primary and secondary sprockets are fixed to shafts to allow the machinery to be operated both in forward and reverse directions.  The application and location of the driving force of the sprocket is dependant on whether forward or reverse motion is required. (See Figure 4)

As a machine is normally required to operate in a forward direction the chain must be designed and oriented in such a way that the chain operates with maximum efficiency and with the least stress.
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