Brake bleeding help

[toyinhawaii]

I completely redone the brake system , rebuilt caliper kits,new rear wheel cylinders lines,etc.
While starting from the farthest point Driver rear i didnt get any fluild back to the brakes,,the resivoir remained full,,so i started from the front and the front D and P side are done...Do i need to prime the master brake cylinder?? i saw a bleed valve (i believe) on the side of it.I tried a couple sites on bleeding the system but nothing helped..So in other words i cant bleed the rear brakes but the front is done. Can someone help me on the correct procedure...Thanks

1973 corona 2 D hardtop, automatic, 18RC

[Dave's]

Someone may say I'm wrong but I don't think you can properly bleed the brake system without starting at the farthest back one, then the other rear, etc. If you have a dual reservoir master cylinder and do nothing to the rear system then maybe, but otherwise you need to bleed them all. If you're not getting fluid from the back bleeders you must have air in the system. Personally I find a hose which fits over the bleed valve and put the other end in a jar with clean brake fluid in it. That way if the hose sucks in anything it's new brake fluid and not air. When the bubbles stop you know the line is bled. But you need to keep the fluid in the master cylinder at all times. If it runs too low you will have to start all over. If the master cylinder is replaced then it usually requires it's own bleeding procedure. Hope this helps at least some.

[toyinhawaii]

daves...Yea, i don't bleed brakes all the time but i knew I needed to start from the farthest point (rear) and its only a single resivoir, and I am using the hose and bottle. I'll check the fittings again to make sure I'm not getting any air leaks and continue to research that possible need to bleed/prime the Master brake cylinder. Thanks for your help.

[Toyotamug]

toy, not familiar with the corona, but this is a reply related to an 86 toyota pu. i remember this piece on my 86 brakes. posting original prob and reply.
Problem
" After rebuilding my rear axle on my 1986 Toyota pickup I went to bleed the brakes only to find that I can not get fluid to flow to the rear brakes at all. I went through the normal brake bleeding procedure, but it is as if something is keeping the fluid from flowing to the rear. The front brakes bleed fine as well as the LSPV at the rear of the truck. But both rear drum brakes have no fluid flowing to them. Even when the brake lines were disconnected from the drum brakes and then the pedal was depressed no fluid flowed to to the rear brakes. "

Reply

" " If you are getting pressure to the lspv the problem is not the master cylinder. Do you know how much pressure? PSI If the valve is sticking in the lspv it will force all the press to the front brakes. Here is what I would try before buying a new lspv. Get a couple of unions and some lines and by pass the lspv. It is only a load sensing proportioning valve. (LSPV) if there is no load you are just going to be sending equal pressure to the rears as the fronts. This will at least verify if the master cylinder and the proportioning valve on the firewall are any good. Worst case scenario you are out a couple of fittings and some line ""

[toyinhawaii]

I did bleed that valve on the Master brake 3-4 times and got a trickle out of it then i got fluid to the rear brakes. So i went ahead and bled the system again. I drove the car but still seemed i was putting some good pressure on the brakes to stop. Although i may need to continue to bleed the system a couple more times, i heard that it may still be posible to have some air in the lines , due to the fact that I completely redone the system. Is a trickle coming out of the valve on the MB all I'm going to see or should it be a good stream? On the rear brakes, i adjusted the gear mechanism to where i jus barely heard the brake shoes rub against the drum..They are self adjusting right or do i need to possibly adjust them more to hear them rub harder? this is a gear style on the inside, not the tumbler style on the bottom where you would adjust it with a screw driver.....Thanks

[verlaryder]

You should post your brake bleeding question on this vintage Corona forum: http://toyotacluborg.proboards.com/i...?board=coronas