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Old 03-05-14, 03:10 AM   #1
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Question Expert E7 braking issues

Hello everyone
I really need some help please

I own a Pug expert DW10UTED4 TURBO DIESEL

Since last year the brakes have slowly degraded. Current status is as follows:

Engine off = hard brake pedal, brakes work like they normally do when engine is off and pads retract.

Engine on = pedal goes to the floor and brakes stick on. Releasing the pedal it rises up slowly and brakes rarely unstick and not much braking when you apply brakes.

Whats been done so far and tried:

New rubber pipes to the calipers
Calipers off, cleaned up, greased up including taking the pistons apart
Pads and discs cleaned up
New master cylinder from main dealer
Bled the air out on each caliper
No fluid leaks, no crushed or blown pipes
Handbrake operates as normal i.e as it should.

As a test i disconnected the vacuum pump which makes the brake pedal hard as if the engine was off but reconnected it.

Sadly problem still remains, sticky brakes, pedal to the floor with slow return and not much braking when you apply brakes. All the brakes stick but more so the front brakes.

Vacuum pump? brake servo? Anyone know what the problem is?

Any and all help appreciated.

Last edited by jimbo634; 03-05-14 at 03:31 AM.
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Old 03-05-14, 06:42 AM   #2
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With engine off and handbrake off do you have to pump peddle to get it hard?
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Old 03-05-14, 07:49 AM   #3
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Sounds like servo or the check valve. Both recently mentioned by me in another thread.

https://www.peugeotforums.com/forums/...members-83170/

https://www.peugeotforums.com/forums/...gnostic-28190/
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Old 03-05-14, 10:01 AM   #4
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Sounds like you have 2 issues the non return and sticking brakes is caused by the pivot BEHIND the servo seizing you need to free this then the pedal will return properly and the brakes will not stick common issue on E7 as the heat dries it out.

The pedal going soft may be a faulty servo are you loosing fluid?
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Old 03-05-14, 10:32 AM   #5
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Quote:
Originally Posted by greegor View Post
With engine off and handbrake off do you have to pump peddle to get it hard?
When engine is off and handbrake off the pedal has a little travel then its hard. Dont have to pump it and brakes release as normal.
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Old 03-05-14, 10:56 AM   #6
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I recon break servo is had it bud!!
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Old 03-05-14, 04:13 PM   #7
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Ive ordered new servo and vacuum pipe from main dealer. I could not find a patent part.

4535 X2 brake servo
4536 16 servo gasket
4578 E8 vac hose
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Old 03-05-14, 04:23 PM   #8
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Not even euro car parts?
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Old 03-05-14, 05:22 PM   #9
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Quote:
Originally Posted by greegor View Post
Not even euro car parts?
I tried :

GSF
Euro car parts
Jayar
Unipart

Not one of them can get a brake cylinder or servo for it despite being 7yrs old. I did call them all. Main dealer only still.
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Old 03-05-14, 05:47 PM   #10
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Blimey, that does surprise me!
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