19Fordy
Well-known member
Following a post by Tubman when he dissasembled a one post sending unit, I did take apart the 2 pole sending unit. Below are the photos of what's inside.
There is a thin piece of clear celluloid that acts as an insulator between the 2 interior spring clips that feed voltage to each of the 2 poles. Inside, at the bottom of the brass tube there is also a metal contact. Not sure what that does.
There is also a tiny slotted screw at the tip of the spring arm that is easily adjustable. I think that sets the temp. at which the points open.
I used JB WELD to seal and hold the top on but, took it apart again to take these photos. I need to try it in a pan of boiling water to see what temp. opens the points.
It sure would be great if these units could be rebuilt as they are expensive. Perhaps a Fordbarner can make that happen. The staple remover is used only to support the unit for picture taking.
There is a thin piece of clear celluloid that acts as an insulator between the 2 interior spring clips that feed voltage to each of the 2 poles. Inside, at the bottom of the brass tube there is also a metal contact. Not sure what that does.
There is also a tiny slotted screw at the tip of the spring arm that is easily adjustable. I think that sets the temp. at which the points open.
I used JB WELD to seal and hold the top on but, took it apart again to take these photos. I need to try it in a pan of boiling water to see what temp. opens the points.
It sure would be great if these units could be rebuilt as they are expensive. Perhaps a Fordbarner can make that happen. The staple remover is used only to support the unit for picture taking.
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