no pressure in the brake pedal
Posted
#1157956
(In Topic #138558)
Settling In
no pressure in the brake pedal
brand new rear brake drums, and everything inside the drum is new
brand new handbrake cables
brand new copper piping throughout
brand new 22mm master cylinder
brand new fluid
2nd hand rust free 9" servo
4x goodridge braided hoses
280mm front calipers + new adapter brackets
all the seels r in tact and there r no leaks anywhere
c the prob is there is no pressure in the pedal when the engine is on, when the engine is off there is a good buildup of pressure when u pump the pedal but when u turn the engine on whilst pushing hard on the pedal it is supposed to move about another inch tops when the servo kicks in but its just sinks (not to the floor) but as far as the pedal can go. from the pedal sitting itself to being pushed down it should gradually get tougher to push until u cant push any further but it doesn`t it feels like im pushing on the gas pedal there is no resistance.
the odd thing is when u push it down u can see the front calipers biting into the disk so there is plenty of movement, the fluid is moving well and the backs r locking up to.
i have blead each pipe starting with the longest 2 shortest with the easybleed system pushing through a full tub of fluid in each pipe, all in all with doing it myself and having help i have prob tried to bleed the brakes easily 12-15 times.
i have changed the master cylinder from 1 that i got with the servo to a brand new 1 thinking the fluid is passing the middle seal and im still getting the same effect (thats £75 i`ll miss).
i have changed 90% of the vacuum hoses
i keep on cumming up with the same thing, its something to do with the vacuum, but what?? when the engine is off there is a good pedal, when u turn the engine on the servo assists the braking and lets the pedal go down a little bit more but on mine it lets the pedal go down a few inches, its as if the servo is doing its job to well i.e. if the servo on brakes that work helps the braking by 10% it feels like its helping mine 90% and taking the build up pressure the pedal is supposed to have away, as i say its like its doing its job far to well……..
any ideas please????? i am running of ideas and getting really fed up with the whole thing, i just want them to work………
Posted
Old Timer
Posted
Settling In
the pedal has a small amount of movement/play (less than 1cm) when it sits itself. if i adjust the rod length what will it do and what way should it be adjusted, i dont want any more play in the pedal as it leaves the brake lights on.
there is an adjuster down at the pedal as well but i cant think what good it will do the prob at hand by messing about with that
this is me right now
suggestions??????????????
Posted
Settling In
Posted
Old Timer
Posted
Settling In
Posted
MOTY 2013
does pumping the pedal help? if so theres air in there. if not maybe the servo is the problem or its not getting vacuum. ion my cabby i managed to fit the non-return valve on the servo pipe the wrong way round, so check that!
are the front calipers the right way up? make sure the bleed nipples are at the top. look over everythign carefully make sure no fluid is seeping past the piston seals or rear cylinders
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted
Settling In
0 guests and 0 members have just viewed this: None.