[AT] Allis Chalmers ED40 3 point hitch

[James Peck]

Tom, I got your response confirming that the ED40s sold in New Zealand were 3 point hitch. 

The first three point hitch tractor, the Ferguson-Brown type A, was manufactured in the UK. I do not know if it was patent protected. By walking away from that joint venture, Harry likely put some of the 3 point hitch into the UK public domain. When he got all the US three point hitch patents for the 9N, that mainly served to keep US based manufacturers from using it gratis. Maybe Ford broke off the joint venture in the US with Ferguson thinking that they would walk away with the intellectual property like David Brown did.

The similar situation is that International was making three point hitch tractors in the UK while IH was making Fast Hitch in the US around the same time.

With the overwhelming dominance of the TE20 in the early fifties in the UK, it made little sense to try and introduce any other hitch system there. 

I had a co-worker who travelled to New Zealand to perform a machine tool CNC control upgrade some years ago. He reported favorably.

I was at a performance around 15 years ago that included a  performer who had emigrated from Shetland to New Zealand and said NZ was a migratory pattern destination for them. Well New Zealand has two islands both bigger than Shetland.

> James AT List Member (jamesgpeck at hotmail.com); I think what you are saying is that Allis Chalmers was building UK tractors with 3 point hitch while they were building US tractors with snap coupler.
> 
> Thomas Martin AT List Member (tmartin at xtra.co.nz); As I remember, the 3 point linkage handrails was a self-contained housing that bolted to the rear center casting. Cylinder was internal, iirc.
> 
> James AT List Member (jamesgpeck at hotmail.com); Does a single cylinder lift the snap coupler arms?
>  
>  https://www.allischalmers.com/forum/search_results_posts.asp?
>  
>  Thomas Martin AT List Member (tmartin at xtra.co.nz);  <snip>  My 
> memorable  moment with an ED40 was when driving a new one to the local 
> show with  a mounted rotary hoe, an O-ring failed dumping the hoe on 
> the tar-seal  and showering me in oil!  <snip>