Pedal was soft but was working so i changed rear outer pads lost some fluid had some brakes so i bled them then i had a little more brake so i drove for aday by end of day i noticed that the right rear brak had been leaking i saw that the fluid release screw was loose so i tightend an rebled now pedal goes to floor no brakes.
Sounds like your bleeding procedure wasn't preformed jn sequence. when you bled brakes initially did you bleed front also ? especially since one bleeder screw was allowing air to enter your system, your front and rear brakes are all one system so if air enters through back bleeder screw, every time you release brake pedal it creates a vaccum to pull pistons off of rotors, and during this action air will make its way to front also. front brakes are 80 percent of stopping power, thats why you will replace two (2) sets of front pads before you have to replace one set back brakes.
Rule of bleeding brakes. Start at furthest wheel away from master cylinder first ( usually passenger side Rear) then drivers side rear, next ensure brake fluid level is still adequate to proceed. Move to Passenger Front wheel and lastly Drivers front wheel. You will find a surprising amount of air in front calipers.. check fluid level again ..do not over full Brake reservoir with fluid . it needs that little bit of space for cushion . trust me. Dont over think this , its not as hard as it seems ,just follow procedure and you will be ok.
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In this case, you will need to leak the for wheels, never leak only one or two wheels when adjusting the breaks. If the leaking continues you need to check the conduit for potential damages. If pedal stay soft after checking everything else, check the break fluid unit. The unit has a piston if I'm not wrong. The piston has some parts that are of rubber material which can wear out or get damaged.
SOURCE: pedal goes to floor on 92 F250
I would strongly recommend checking your trucks R.A.B.S. (Rear Antilock Brake System) valve . It is located on the left frame rail just under where your left foot would rest . They can leak internally and exhibit the problems you are describing (loss of pedal , with no fluid loss) .
It is highly unlikely that a power booster would cause this , as a failed booster will show itself in these ways . 1) a hissing sound when you apply the brakes (indicates a vacumm leak) 2) rough engine idle/stalling when brakes applied (also indicates a vacumm leak) or 3) No power assist (brake pedal hard to push) .
If you do discover your hydraulic problem is in your RABS valve , don't forget to bleed it ,(there is a bleeder valve on it) and the rear brakes again after you replace it .
Hope this helps
Doug
SOURCE: schematic of front end parts for 99 f250 4x4 v10
4x4 will not ingage in f-250 v-10 checked all fuses under dash not sure what relay it is
SOURCE: 2003 ford F250 king ranch
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SOURCE: Replaced brake pads on 2001
you need a new master cyclinder..you needed to open the brake line before you forced the caliper back in ,,,otherwise you force the fliud the wrong way though the master cylinder and ruin the internals
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