Problem bleeding new brakes.

-
George Lawicki

George Lawicki

Well-Known Member
Joined
Oct 20, 2019
Messages
177
Reaction score
52
Location
Cleveland OH
Hey guys,

I installed a new master cylinder and new calipers on my 74 Dart. I have manual disc brakes. I was using a hand vacuum pump to bleed the lines at the cailpers and on the passenger side I was able to get fluid out of the bleeder screw however, on the drivers side, I was not able to get any fluid out of the bleeder screw. The car has been sitting for 7 months is it possible that the brake distribution block is no good or blocked?
 
Disconnect that line from the distro block and see if fluid flows from it.

What is the history of the distro block
 
Loose rust in the hard line can stop up the bleeder or the dist. block.
Bad bleeder screw
Internally collapsed rubber line
 
I have all new rubber hoses going to the calipers. I completely removed the bleeder screw from the caliper and nothing came out. The distribution block Iam assuming is original
 
I would reinstall the bleeder screw and pump the brake pedal using about 5-10 short strokes then try bleeding again sometimes the old blocks just need a little more pressure to get them flowing again. Then they start working. If not Dr Diff usually has them in stock.
 
Never had one iota bit of luck trying to vacuum bleed and I've tried it a bit over the years. Hydraulic brakes are not vacuum operated, but pressure operated. I've always had the best luck bleeding the system as it was designed. Under pressure. Did you bench bleed the master cylinder?
 
This may sound like a silly question, but it does happen so.....

Calipers installed on the correct sides with the bleeders pointing up?
 
I have had these issues with all new components!

See post #5!

It sometimes takes a combination of Vacuum, Pedal pressure, and just plain old Gravity to make thinks right.

Assuming all the components are installed correctly this is easily achieved!
 
I agree with Rusty, I just had this problem on my old Dodge truck, tried and tried with two different vacuum bleeders, with little success, finally I got my 11 year grand son pushing on the pedal and was done in 15 min, get an assistant!
 
master cylinder is bleed but I did notice when I closed off the bleeder screw and applied pedal pressure that there was some brake fluid seepage around one of the brake line fittings going into the distribution block.
 
You must log in or register to reply here.
-

Back
Top