Pump

charles4d

 Here a pick you brain question  if you have a 6 volt system on your car can you use a 6 volt fuel pump for the wipers for extra vacuum ?

charles4d

Ok thanks

Lance

Use what Ken said and also add a vacuum tank.

1954Hudson

Charles has a 1940 Hudson pick /up 6 212 not sure if there is double action pump for that engine

Jon B

My recollection is, that one can buy a double action, but I was once warned by the late Steve Sessions that the spring pressure on the internal arm is so great, that it will wear down the lobe on the camshaft. (No one besides Steve ever said that, though!)

charles4d

That's good to know

bob ward

FWIW Toyota 4 Runner diesels used to have a small vacuum pump attached to the back of the alternator to provide vacuum for the power brakes.

charles4d

Thanks it's a 6 volt system with the generator on it