TO20 Temp Gauge Sending Unit

Dave Berrie · Jun 16, 2009

Hello,

I have a '51 TO20 #47,482 which has an ammeter, oil pressure and water temp gauge. Also, a red warning light for something.

The ammeter and oil pressure are working fine. The water temp gauge has rust in it and a broken sending wire.

Since they don't have water temp gauges at YT ... what's the closest thing to the original?

And what is that red light for?

Dave in Utah

Bob (Aust) · Jun 16, 2009

Dave.

The red light is an ignition warning light. The circuit diagram for your tractor is [b:f6ffddcf6e]HERE[/b:f6ffddcf6e] on the FENA web site.

I think the TO20 will use a standard two inch temperature gauge which should be easily available from most parts stores. Sparex list various gauges for Ferguson tractors [b:f6ffddcf6e]HERE[/b:f6ffddcf6e].

Sparex parts are available from most tractor parts suppliers.

Bob in Oz
'53 TEA20

Jeff-oh · Jun 16, 2009

Agco has a temp gauge from their heritage line of parts.

Richard L · Jun 16, 2009

Dave, I believe if you will check in the archives you will find that once an ammeter is installed the red light has to be eliminated. The red light when it came from the factory would light up red when the battery was discharging. So the way I understand it you can use the red light or the ammeter but not both at the same time. Richard

Jerry/MT · Jun 16, 2009

I think you find that the temp gauge is a capillary tube gauge anot an elecrical sensor driven gauge.

Kevin OH · Jun 16, 2009

i have a 1950 to20 and all it has is a ammeter and a oil presure gauge.it dont have a water temp gauge.but i am going to try to put one on it later after i get everything else fixed.

Dave Berrie · Jun 16, 2009

That would make sense. Why would I need an idiot light when I have a meter.

Don't ask my wife.

Dave

georgeR · Dec 26, 2014

(quoted from post at 20:25:59 06/16/09) i have a 1950 to20 and all it has is a ammeter and a oil presure gauge.it dont have a water temp gauge.but i am going to try to put one on it later after i get everything else fixed.

sorry to bring back an old thread, I am in the process of tinkering with my 1949 TO 20, I bought a set of gauges from Harbor freight, mainly because I am rewiring the tractor and not sure about the ammeter that was on it ( wires cut off ), the cluster I bought also came with a water temperature gauge, which my tractor did not have, I ran a search and came across a couple threads like this one yet not the answer I was looking for.

I would be interested to hook up the temperature gauge question is where should the probe go?

I gather some tractors have been outfitted with it, factory or not, I guess there are many places where it could be installed, what is a good spot, is there a place on the block for it?

any input much apreciated

Steve@Advance · Dec 26, 2014

The Z120 may or may not have a threaded hole on the left underside of the thermostat housing. If it doesn't, I "think" maybe a later model housing will fit. (Don't go buy one on my word though!) That's where the factory, later model cap tube type gauge goes. The cap tube type is held in with a compression type fitting, the electric gauge you have will use a NPT thread. It will need an adapter.

That is really the only proper place to install the sender. Putting it down in the block will be too low. By the time it reads an over temp condition, it will be too late!

georgeR · Dec 26, 2014

(quoted from post at 21:38:25 12/26/14) The Z120 may or may not have a threaded hole on the left underside of the thermostat housing. If it doesn't, I "think" maybe a later model housing will fit. (Don't go buy one on my word though!) That's where the factory, later model cap tube type gauge goes. The cap tube type is held in with a compression type fitting, the electric gauge you have will use a NPT thread. It will need an adapter.

That is really the only proper place to install the sender. Putting it down in the block will be too low. By the time it reads an over temp condition, it will be too late!

I have kept searching since posting and I came across a few threads that mentioned the thermostat housing, before/below the thermostat itself, the gauge I got came with a couple of fittings, its a capillary type no electric wires, it has one fitting on the line and it came with another fitting which has a seat bolt in for the probe to rest on, looks like a 1/2 inch NPT type common thread ( just eyeballing ), so I guess I'll check the thermostat housing and if nothing there I may just tap and thread it, thx for the reasurrance

Jason S. · Dec 27, 2014

(quoted from post at 06:20:27 12/27/14)

(quoted from post at 21:38:25 12/26/14) The Z120 may or may not have a threaded hole on the left underside of the thermostat housing. If it doesn't, I "think" maybe a later model housing will fit. (Don't go buy one on my word though!) That's where the factory, later model cap tube type gauge goes. The cap tube type is held in with a compression type fitting, the electric gauge you have will use a NPT thread. It will need an adapter.

That is really the only proper place to install the sender. Putting it down in the block will be too low. By the time it reads an over temp condition, it will be too late!

Click to expand...

I have kept searching since posting and I came across a few threads that mentioned the thermostat housing, before/below the thermostat itself, the gauge I got came with a couple of fittings, its a capillary type no electric wires, it has one fitting on the line and it came with another fitting which has a seat bolt in for the probe to rest on, looks like a 1/2 inch NPT type common thread ( just eyeballing ), so I guess I'll check the thermostat housing and if nothing there I may just tap and thread it, thx for the reasurrance

Where your water outlet comes off of the cylinder head,on the left side you will find a square plug. Unscrew it and that is where your sending unit or bulb goes. I did mine a few years ago. The threads were correct but the hole in the back wasn't big enough for the bulb to pass thru. I drilled that hole a little bigger and put an print on it to help it seal. This site does sell the gauge.Look under TO-35 gauges.

georgeR · Dec 27, 2014

what did you do about the gage itself, hole saw meets dash? never used one for metal before guess they make bimetal, I'll have a look while out there again

TO20 Temp Gauge Sending Unit

Dave Berrie

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Bob (Aust)

Well-known Member

Jeff-oh

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Richard L

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Jerry/MT

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Kevin OH

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Dave Berrie

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georgeR

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Steve@Advance

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georgeR

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Jason S.

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georgeR

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