Mastercylinder bleeding

[Belgium Cuda]

Does both circuits/reservoars has to be bleeded at the same time when bleeding the m-c? Are they
connected together?

Per

[ShelbyDogg]

You can bleed the front or back as separate areas. Doing so might push your Prop-valve over center and make the light come on. When it does, you have to allow a little pressure to escape the other side to turn it off.  Why not bleed all 4 wheels and change out to clean-clear fluid now anyway? Your steel brake lines will live longer without brake fluid with moisture in it.

[Changin Gears]

They are not connected together, it is a safety backup system.  If one of your brake lines fail or another fluid loss problem on the rear the front brakes will still function.  This is when the brake warning light will turn on.

[Chryco Psycho]

it is easier to bleed both at the same time using 2 return hoses into the reservoir

[hooD]

it is easier to bleed both at the same time using 2 return hoses into the reservoir

   I replaced both my M/C and booster.  It was easy to bench bleed the M/C with the return hoses that came with it.

[Belgium Cuda]

Thanks guys I'm fighting with this for a while now. It's on my chargerproject, all new things from booster to wheelcylinders and calipers. Have now tried to push in oil from right rearbleeder to fill up the system
because I can't get any pressure on the pedal. Will do m-c ones moore and try again normal bleedingprocedures.

Per

[ShelbyDogg]

Thanks guys I'm fighting with this for a while now. It's on my chargerproject, all new things from booster to wheelcylinders and calipers. Have now tried to push in oil from right rearbleeder to fill up the system
because I can't get any pressure on the pedal. Will do m-c ones moore and try again normal bleedingprocedures.

Per

Try another master cylinder. Just having the bleeders open should free flow the fluid all the way down. Even the newer prop valve should allow fluid to flow when it is less than 5 lbs of pressure.

[burdar]

I've seen a few new master cylinders like "Hood" posted.  The factory ones(at least for Hood's 73) had the larger "rounded" reservoar in the front NOT in the rear.  Aren't you going to want the larger one for the front brakes?  You need that extra fluid for when the pads wear and the piston sticks farther out of the caliper.

[Belgium Cuda]

I have the same with the large at the rear but it is for the front brakes.

Per

[burdar]

OK...I was partially wrong.  I just looked at an origonal picture of hooDs engine compartment that was taken in 73.  It shows the same master that he just showed a picture of.  I looked at an old pic of my car and the larger  reservoar IS in the rear on that one as well. 

What differs is where the rounded section is.  hooDs car has the rounded section at the back by the mounting flange.  My origonal one has the rounded section on the front side.  Why there are two different master designs I don't know.  Both cars were ordered a month apart and you couldn't get drum brakes on the front in 73 I didn't think.

Maybe its a Cuda, Challenger thing.  Bullitts Challenger looks to have the same master as mine.

[Belgium Cuda]

Can't build up any pressure on my pedal, hits the floor every time no matter what I do. Forced oil from
right rear to check for leaks and that the oil is passing and it's OK. Adjusted the rod in the booster with no
change, bleeded mastercylinder several times. System has oil but I can't bleed it
Someone sad gravitybleeding but the mastercylinder only opens the ports when pedal is pressed.
Need desperate help.

Per

[ShelbyDogg]

Did you try another master cylinder yet?

[Belgium Cuda]

Will do tomorrow. There was a distributinblock together with the brakekit but I used the stocklooking type,
can that have a influence?

[ShelbyDogg]

Is everything hooked up as-stock when looking at other mopars compared to yours? What "brakekit" did you get that came with a different block? Everything should work as long as the big part flows to the front disc brakes and the small part to the rear. Opening the bleeders then pushing the pedal just once, should shoot fluid out as fast as you can pump the pedal.  That isn't the case?

[Belgium Cuda]

Swapped to another mastercylinder (same type) which I first had benchbleeded but the result is the same.
No oil coming out of rear bleeders when pressing pedal down, impossible to build up pressure with bleeders
closed. Took the first mc and benchbleeded it, this time when you press the cylinder it squirts oil/air thru
the holes in the reservoar, or out of the holes. That didn't happen before with this one and not with the other one either. The oil passing the bleederhose is airfree. Is that normal?

Per