Shaun, I think you do it with the weight of the carrier on the ground.
Pins are not coated with anything. The pins are hardened (not at the end) and the carbon in the s.g. iron link acts as a 'lubricant' (dis-similar metals)
Suggest you stick with the ratchet strap, but make up some metal hooks that go through the sprocket holes.
The suggestion is based on the Australian track winch hook as an example. It is held in place by a small pin.
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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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