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Fordson Model N

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Phil Ploof

10-11-2001 05:54:06

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I am still working a 1944 Fordson Model N tractor. This is a tractor which I have recently imported from England. It appears that the dock or warehouse workers started and ran the engine without any water in the radiator and it overheated. This caused a crack in the cylinder head and it appears to have runied the piston rings. I have just discovered that it only has 70 psi compression. I put some oil in one of the pistons and the compression went up to 125 psi. Can anybody tell what the compression should be for this tractor. The engine runs but only by holding the choke half closed. Do you think this is due to the low compression? Thanks for any help.

Phil

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Andrew from Aust.

10-17-2001 00:35:25

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Re: Fordson Model N in reply to Phil Ploof, 10-11-2001 05:54:06

Hello,
I'm not sure about your compression pressures. I'm not used to measuring this. Usually I'm just grateful for what the poor things have got! My Fordsons generally have fair compression and can tell this by the way the handle wants to spring back from compression. My machines are well used (worn in) and start and run reliably. Problems I have had with having to use the choke whilst running have stemmed from leaks at the manifold gaskets (drain valves on the Fordson majors ) air leaks on the pipes/hoses to the air filter and lack of restriction in the air filter(when there is no oil/water in the filter).

I don't know whether this has helped you but thought you deserved some reply!

Best of luck
Andrew

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Phil Ploof

10-17-2001 06:20:29

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Re: Re: Fordson Model N in reply to Andrew from Aust., 10-17-2001 00:35:25

Andrew,

Thank you for the reply. You are the first to mention the air restriction from the water/oil filter. Is this restriction necessary as I have been trying to run it without hooking up the pipe from the carburator to the air wash.

Thanks,
Phil

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Andrew from Aust.

10-17-2001 20:33:31

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Re: Re: Re: Fordson Model N in reply to Phil Ploof, 10-17-2001 06:20:29

I've found it to affect some tractors more than others. They are obviously designed to work with a filter which would restrict the airflow to a degree.

It sounds as though it may pay you to go further with this tractor if you suspect it has overheated so much so that the head has cracked.

Over here heads are pretty easy to come by and I would swap it rather than fiddle around with the old one. Ring sets also seem to be cheap and readily available and might be worth looking into while you're there.

Are there many Fordson Ns over there? They are pretty common over here, not to take anything away from them! I have a few of them!

Good luck!

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