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AMC camplate question

Evening ladies and gents

I am in the process of doing a light rebuild on the gearbox for my Triton project and need some advice. When inspecting the camplate I noticed a small scallop out of one of the tracks (photo included). So my two questions are :

1 - any ideas if this is a sign of another problem that I haven’t yet identified?  2 - is smoothing this scallop out and refitting the cam plate an acceptable solution or is replacement warranted. 

The rest of the box is in pretty good condition, it will be getting new steel kickstart shaft bushings as these are a little slack on the shaft, new bearings and seals of course. The other bushes and all gears and shafts seem like new so they will be going back.   

Any assistance will be most appreciated Camplate divot

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If it were mine I would fill with weld and dress up.  I would also check the selector fork for wear and investigate why the wear occured , camplate action restricted ?.misstimed?  a crude attempt  by an idiot to stop a box jumping out of gear?.

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Scrap it and buy another, the track is case hardened and welding could destroy the adjacent case hardening in the track and / or distort the plate which is ground flat. if you dress it the selector fork could become disengaged from the plate. 

You can also see in the damaged area where the boss on the selector has not been fully engaged in the plate, this suggests the gear the selector fork engages with or the 'mouth' of the selector is not to drawing.   

Considering the parts are readily available and a botched up gearbox can kill you, it really does not make sense to repair this, find the cause and get new parts. Something tells me the plate is not the problem and is purely showing the result, something else caused that damage. 

 


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