Just replaced Booster. Master is good, proportioning valve replaced with Wilkinson "T". Now when I pump the brake pedal no fluid moves out of the reservoir. All stock system. What could have changed?
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There is something happen to the rod coming from the brake pedal ore the rod going to the Master Cylinder. The piston in the master cylinder is not coming far enough back to let brake fluid in to the cylinder?
Did you prime the Master Cylinder?
That master cylinder needs to be bench bled before you install it.
No, did not. How do you do that? I have the same problem with clutch master, can't get enough fluid to move. It is new.
You CAN do it in the car but it is usually messy.
You need to make a brake line for each reservoir exiting port that loops back into the reservoir.
Then pump the brake pedal a couple of times or at least until air bubbles stop coming out of the tubes.
Then reconnect the lines to the front and rear brakes and bleed them as usual.
You bleed the longest line first.
On most cars that is the right side of the car.
If the pedal does not come up now, that means the master is not producing pressure and it is leaking internally and as such should be considered defective.
That is happening more these days since quality control has gone out the window. Products are being built "off shore", which is a generic term for "good luck pal".
You need to make a brake line for each reservoir exiting port that loops back into the reservoir.
Then pump the brake pedal a couple of times or at least until air bubbles stop coming out of the tubes.
Then reconnect the lines to the front and rear brakes and bleed them as usual.
You bleed the longest line first.
On most cars that is the right side of the car.
If the pedal does not come up now, that means the master is not producing pressure and it is leaking internally and as such should be considered defective.
That is happening more these days since quality control has gone out the window. Products are being built "off shore", which is a generic term for "good luck pal".
Okay thanks. I did see that on Youtube. Basically just recirculate the fluids in the reservoir. I think I'll remove it to protect my brand new carpeting, and paint job.
quote:Originally posted by RRS1:
Okay thanks. I did see that on Youtube. Basically just recirculate the fluids in the reservoir. I think I'll remove it to protect my brand new carpeting, and paint job.
Best to be safe. The brake fluid will dissolve the paint where it touches it.
Some master cylinders aren't as sensitive to this as others but I've learned to always do it before putting it in the car.
Saves a lot of wasted time often.
I guess what it is doing is priming the pump?
Priming the master cylinder can be a real bitch or it can be easy. I had one that just would not get the fluid moving and I just had to walk away for a couple of hours. Which fortunately worked. But I had others that were quite easy even priming in car.
Harbor Freight sells a brake bleed kit. It pulls fluid (and air) out of the lines and master cylinder. Very easy to operate and saves a ton of time and frustration and it is pretty cheap.
I have a power bleeder from Mighty Vac. It comes with a bottle that is like a bug sprayer. Pour the brake fluid in. Pump pressure up and it pushes fluid threw.