Master cylinder question

[72c20customcamper]

Originally Posted by RichardJ

>>So to close this out are you in agreement the front reservoir (front of truck) is for front brakes ?<<

NO, as in NO

In this image the brake is lightly applied. The fluid in red is under pressure. The Secondary Piston floats between the two equal pressure chambers. The outlet from the Primary Port is exactly the same as the pressure from the Secondary Port.
When the brakes are not applied, the two springs center the secondary piston between the two chambers.

It doesn't matter which port eventually feeds the rear brake circuit as long as a proportion valve, if used is in that circuit.

Wouldn’t the front larger reservoir be used for the disc brake ?

I’m a little confused because the original post stated a stock drum/drum setup but then it comes to pass he has an aftermarket disc/drum setup