Break pressure regulator

R5T · 24-02-13, 06:42 PM

Evening people

I'll keep it brief, I know that not everyone is interested in my main project thread hence why I'm posting this as an outright thread itself.

My coupe failed it's mot on a few little bits which I can do for little expense, however one item that it failed on was the break pressure regulator/load valve being inoperative. I'm pretty sure it's just seized from where the car has sat still for so long.

How does it work ?

Can it be "serviced" ie. Wd-40 and a bit of wiggling around etc.

Has anyone got a picture/ diagram etc ?

And has anyone had an experience with them ? Are they worth trying to service ? Or is it easier to just replace it.

At £95 I'd rather have a go at servicing or repairing etc so any help or suggestions is greatly appreciated.

Many Thanks

Sam

Audi Derek · 24-02-13, 07:13 PM

If the hammer and duck oil doesn't work then theres always Ebin..

http://www.ebay.co.uk/itm/BRAKE-POWE...item2c6be95a4f

..

R5T · 24-02-13, 07:24 PM

I did have a sniff on eBay but I could only find them for around £85-100 quid, that link you gave me ? Is that definitely the right part ?

Thanks

Sam

Audi Derek · 24-02-13, 07:25 PM

You will have to have a good look at the one on your car and see if its the same..

..

MEX · 24-02-13, 07:27 PM

Worth trying to fix as they are quite straightforward. It is probably the pivot pin that has seized.

More information here: http://www.sjmautotechnik.com/troubl...ing/brake.html

fourringsrus · 24-02-13, 07:38 PM

Thanks for the link, on my boys behalf

R5T · 25-02-13, 07:39 PM

Yep thanks for the link MEX, made things a bit clearer, so will be having a go at that next time the weather has a break. Thanks again

Sam

R5T · 04-03-13, 08:33 PM

Evening gang, over the weekend we set about attacking the few bits that had failed the MOT, top mounts are done, which left us with this regulator to attack ...

The falkrum looks as if one of the pins that holds it in place has broken and a spring is missing ? so there is alot of mevement in the plate, however i dont know what they look like out of the factory ... we sprayed around with penetrating fluid and prodded and poked about ...

How much should the pistons move ? the pistins are moving around 2mm ? they move when the pedal is pressed and released .. should they be moving more ? or does the whole thing have to be taken off (releived of fluid pressure) to get them to move more ?

Thanks people

Sam

R5T · 11-03-13, 12:39 PM

Hi people

Really need some advice on this now, I've decides to replace the regulator, there are two types of regulator fitted to the cars in 1990, a single piston unit and a twin piston unit. I have spoken to Audi directly and they have said that by the prices of elimination mine should have a single piston unit. My car has a TWIN piston unit.

Does anyone know which one SHOULD be on the car ? If not, does it make a difference ? If I fitted the single piston unit would it still work ?

I'm hoping to get this wrapped up asap as Can get either part on the shelf, but I want to know which one I should go for.

Please guys, any help really really appreciated.

Thanks
Sam

24-02-13, 07:13 PM	#2
Audi Derek “Been raced and rallied” Classic Audi Club Member Join Date: May 2008 Location: Bridgwater Somerset Posts: 1,431	If the hammer and duck oil doesn't work then theres always Ebin.. http://www.ebay.co.uk/itm/BRAKE-POWE...item2c6be95a4f .. __________________ Vorspurng durch Technik (see it does work)

24-02-13, 07:24 PM	#3
R5T Grown up member Classic Audi Club Member Join Date: Jul 2012 Location: Kent Posts: 284	I did have a sniff on eBay but I could only find them for around £85-100 quid, that link you gave me ? Is that definitely the right part ? Thanks Sam __________________ 1990 Audi Coupe 2.3E 10v

24-02-13, 07:25 PM	#4
Audi Derek “Been raced and rallied” Classic Audi Club Member Join Date: May 2008 Location: Bridgwater Somerset Posts: 1,431	You will have to have a good look at the one on your car and see if its the same.. .. __________________ Vorspurng durch Technik (see it does work)

25-02-13, 07:39 PM	#7
R5T Grown up member Classic Audi Club Member Join Date: Jul 2012 Location: Kent Posts: 284	Yep thanks for the link MEX, made things a bit clearer, so will be having a go at that next time the weather has a break. Thanks again Sam __________________ 1990 Audi Coupe 2.3E 10v

04-03-13, 08:33 PM	#8
R5T Grown up member Classic Audi Club Member Join Date: Jul 2012 Location: Kent Posts: 284	Evening gang, over the weekend we set about attacking the few bits that had failed the MOT, top mounts are done, which left us with this regulator to attack ... The falkrum looks as if one of the pins that holds it in place has broken and a spring is missing ? so there is alot of mevement in the plate, however i dont know what they look like out of the factory ... we sprayed around with penetrating fluid and prodded and poked about ... How much should the pistons move ? the pistins are moving around 2mm ? they move when the pedal is pressed and released .. should they be moving more ? or does the whole thing have to be taken off (releived of fluid pressure) to get them to move more ? Thanks people Sam __________________ 1990 Audi Coupe 2.3E 10v

24-02-13, 07:27 PM	#5
MEX Newbie! Classic Audi Club Member Join Date: Nov 2011 Location: York Posts: 17	Worth trying to fix as they are quite straightforward. It is probably the pivot pin that has seized. More information here: http://www.sjmautotechnik.com/troubl...ing/brake.html

24-02-13, 07:38 PM	#6
fourringsrus Grown up member Join Date: Feb 2011 Location: Ashford Kent Posts: 468	Thanks for the link, on my boys behalf

11-03-13, 12:39 PM	#9
R5T Grown up member Classic Audi Club Member Join Date: Jul 2012 Location: Kent Posts: 284	Hi people Really need some advice on this now, I've decides to replace the regulator, there are two types of regulator fitted to the cars in 1990, a single piston unit and a twin piston unit. I have spoken to Audi directly and they have said that by the prices of elimination mine should have a single piston unit. My car has a TWIN piston unit. Does anyone know which one SHOULD be on the car ? If not, does it make a difference ? If I fitted the single piston unit would it still work ? I'm hoping to get this wrapped up asap as Can get either part on the shelf, but I want to know which one I should go for. Please guys, any help really really appreciated. Thanks Sam __________________ 1990 Audi Coupe 2.3E 10v