Marc
I would guess that this "rimmed" sprocket, was introduced to help the track chain run a little better to try to alleviate this uneven wear. The book says that the track should be removed, and the sides balanced. This might include swapping the track from one side to the other, to get optimum life from it.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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