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Brake Pedal TOO HARD and Brakes Sticking? 

 

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 Post subject: Brake Pedal TOO HARD and Brakes Sticking?
Posted: Thu May 20, 2010 2:25 pm 
Stock as a Rock
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Age: 31

Posts: 160

Joined: 28th Mar 2005

Ride: EF Falcon Futura

Location: Brisbane
QLD, Australia

Gday,

I think I may know the problem, but want to make sure before I go and buy another master cylinder.

I had spongy brakes in an EF so I put an AU master cylinder in and bled the system. Driving along the pedal just kept getting harder and harder until it got to the point where all 4 brakes were stuck on and the car wouldnt move until I released the pressure from the system.

So Im guessing that the AU master Cylinder must be different to the EF?? Or have I not bled the brakes properly??

Cheers
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 Post subject: Re: Brake Pedal TOO HARD and Brakes Sticking?
Posted: Wed May 26, 2010 1:38 pm 
Parts Gopher
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Posts: 89

Joined: 20th May 2009

Ride: EB 91 now with mpfi

Location: wodonga
VIC, Australia

exactly what my 68XT wagon did after i bled the system, according to the shop i stuffed the booster by pushing the piston too far in ( to hard on the brake pedal when bleeding) brakes stay on cause its not releasing vac or something, so i'd be looking at the booster first
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 Post subject: Re: Brake Pedal TOO HARD and Brakes Sticking?
Posted: Thu Jun 10, 2010 11:06 pm 
Fordmods Newbie
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Posts: 1

Joined: 22nd May 2009

Location: Perth
WA, Australia

What has happened is that you have pre-loaded the master cyl.
Basically the rod of the booster is holding the master cyls piston in a little, and this prevents it from relieveing pressure. You must either shorten the booster rod or place a suitable sized spacer between the mast cyls body and booster.
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