Question about Cars & Trucks
Just replaced master and hidroboosterm and I have no brake pedal
The system has to be bled, starting with the farthest wheel from the master brake cylinder, then the next etc. Till you get all four done. Then the booster has to be set properly. It is a critical adjustment.
Posted on May 02, 2013
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Posted on Jan 02, 2017
I am a hydraulic technician and I can tell you that air is a killer in the hydraulic system.
Start from the rear and work your way forward. I f you are using the two person method, make sure the second person keeps the master cylinder full. If the fluid level dropped anywhere in between pressing and releasing the brakes....you have a lot of air in the system.
Make sure you are tightening the bleed valve when the brake pedal is full pressed.
Remeber...start from the rear brakes first, then do the front.
Posted on Mar 16, 2009
Did you bench bleed the master cyl. before installing it? then when you installed the new master, did you bleed all 4 points? If yes, then check all for points for leaking caliper/s and leaking wheel cylinder/s. If the van has ABS, check the valve body for a bleeder screw and see if air bleeds out of it. If you've checked everything twice and did everything right then your new master cyl. may be defective.
Posted on Apr 29, 2009
it could be that the master cylinder is bad or the brake booster is bad also check the vacum hose going to the brake booster if it has a hole in it it will lose pressure and make the engine lose rpms
Posted on Aug 23, 2009
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