The sender is pipe thread, no washer used.
The stock anti-run on switch is Normally Closed, it opens when there is oil
pressure. This is the reverse of what you want.
Just use a regular oil pressure warning switch of the correct rating and pipe
thread.
Kelvin.
>
> The oil gauge in the 77-80 MGBs are connected to an oil pipe
> (435-435) that
> goes to a connector (180-245) and then on to another pipe
> (376-180). Into
> the connector a switch (141-715) is screwed in.
> Page 96 in Moss catalog Fall Issue 2 - 0310
>
> My questions are:
> Does the switch just screw in without a washer?. I find
> that it does not
> screw down onto a shoulder so a washer cannot be used.
>
> Can the switch be used to activate an oil pressure failure
> light? It says
> it is for an ant-run on valve! Its location is better than
> running a wire
> from the oil pump!!!
>
> Regards
> Barrie
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