I dont know if if this will be of value to anyone, but I didnt have the mechanical switch for my 46-7 Hudson brakes so I decided to figure a way to use a hydraulic switch. I had also converted the 47 to 12volt . Here is what I used to do this.
[url= http://www.oreillyauto.com/site/c/detail/EDE0/127033.oap?ck=Search_127033_-1_-1&keyword=127033 ]Edelmann 127033 - Edelmann - Inverted Flared Fitting[/url]
[url= http://www.oreillyauto.com/site/c/detail/EDE0/146320/N1165.oap?ck=Search_N1165_5134367_-1&pt=N1165&ppt=C0248 ]Edelmann 146320 - Edelmann - SAE 45 Degree Flared Fitting[/url]
[url= http://www.oreillyauto.com/site/c/detail/BWD0/S194.oap?ck=Search_sls27t_-1_-1&keyword=sls27t ]BWD – Hydraulic Stoplight Switch[/url]
I dont know if this is necessary but the 127033 fitting had a smaller diameter inside, so I lined it up on my drill press and drilled it out a little bigger. You need to make sure it is centered.
Leave the brass fitting in the master cylinder. Unscrew the brake line and screw in the 127033 fitting in. Then pull back the brake line and screw it into the 127033 fitting. Then screw the 146320 onto the top and then screw on the Stoplight switch. You can attach the 146320 fitting first before you install but not the Stop light switch.
Other than the drilling out part, this is really pretty straight forward. The only change will be the wire ends (female versus male bullet end).
Does this not solve the problem??
>> http://www.speedwaymotors.com/Universal-Mechanical-Brake-Light-Switch,1972.html
The way the existing switch mounts on the 46-7, I think this would take some additional customization. I think the holes are perpendicular to the movement of the brake pedal whereas this is in line with movement of the mechanical arm. It would need to be aligned or a small flat plate welded on this arm keep it from slipping off the brake pedal.. The pressure switch seems to work fine and once installed would not need to be customized again if you needed to replace it.
Aaron
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