Oil Pressure Engine Unit
 

Can any one help with where I could get a C01UC 9278B Oil Pressure Engine Unit or an alternative please.

Thanks Stephen

oil pressure sending unit, electronic
 

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See Mac's Antique Auto Parts at URL: http://macsautoparts.com/search.asp?...unit&x=20&y=10


Oil Pressure Sending Unit - 80 Lbs. - Original Style - With Round Head Screw At Top For Gauge Wire - Ford
Year 1935-1953
Part Number 41A-9278-WG
Required Number 1


NOTE: Most 1942 & earlier engines originally came with a 50# gauge and sending unit.
Over the years, many engines were overhauled using the later 80# oil pump and system

Stephen, there are basically two types of senders. one type is an on off switch, that turns on (or off) a light. (these are generally the small ones.
The other sort has a diaphragm in it to send a varied signal (resistance) to the gauge.
This is what you require. My understanding is that Ford used two different units, The later one that Michael shows (# 80, suits a 0 to 80 psi range) and the earlier one (#50,which suits a 0 to 50 psi gauge) Which is probably what the C01UC-9278-B is.
If you have an old one, it will probably work. It can be tested if the ignition is on, with the wire disconnected from the sender, the needle should move to one end of the scale, and with the wire grounded on the engine block (earthed) the needle should travel to the other end of the scale. If you get this result, the gauge is o.k.
My understanding is that the senders work with a 6 or 12 volt system, however the gauge unit requires the fitting of a resistor to convert it from 6 to 12 volt.
I am confused on this because I have see senders marked "12 volt".
If you use the wrong sender, the gauge will read incorrectly. You would be able to buy a modern sender to match closely your gauge unit. You may also need an adapter to fit it to the engine.

Thanks Michael and Lynn, I have a 12v system so will have to put a resistor in the circuit once I get a sender.
Stephen

Sorry for hijacking this thread, but what about the "hydraulic" (non-electric) oil pressure gauges? I think I have this Smiths one on my carrier and it must be connected with the engine oil system by copper pipe. Is the correct measuring point the same as for the electrical type - i.e. oil output on the engine block? I guess yes.
Does anyone else has this oil gauge too? :)

The Canadian produced MK-I* vehicles started with a mechanical device but changed over to electric. I know that does not help with your British production, but the vehicle Stephen has is Canadian, as is his upgraded 100 hp engine.

Hi Petr

Yes that's the earlier British type gauge. Smiths and ARIC make the same gauge, only difference is the makers name on the face, both are correct. Yes it's just connected to the engine by a copper pipe from the same place.

They work well.

Ben

Thanks guys! :salute:

Its interesting that even mine carrier is very late production, Britons kept this "obsolete" style of gauges to the end. Very british! :thup2: :)

Petr, Bowden (capillary type gauges) have a reputation for being reliable.

my Cromwell has the same gauge and it works perfectly well.