Front Brakes Master Cylinder?

[Auggie56]

Dual master cylinder front brakes reservoir? Is it the rear or the front that controls the front brakes?

 

[BeepBeepRR]

typically rear tank.

 

[XS22J8R]

Generally the rear but always the larger of the two fluid chambers.

 

[WileE]

#2 & #3 ^

 

[RemCharger]

Generally the rear but always the larger of the two fluid chambers.

You could drive yourself crazy trying to figure out the larger one on a drum brake!

 

[MoparLeo]

The larger reservoir will always be for the disc brake axle.
The smaller is for drum brake applications.
Why ?
Because of fluid displacement when braking.
wheel cylinder average size diameter is 1" + or -
Disc brake caliper piston diameter, average is " approx. 2" for a single piston caliper.
So when braking you need more fluid capacity ro the disc caliper piston.