ur quattro (WR '85) brake booster - Page 2

mikes2 · 30-06-20, 07:33 PM

Often called a servo but brake booster is what the manufacturers call it.

I've got a spare but it's from an MB and I'm sure the WR uses a different version.

ATE Classic may be worth contacting - even just to find out if rebuilding is an option.

StoutyBoy · 30-06-20, 08:31 PM

Thanks Mike. Yes booster is what I knew it as. Best bet is to remove it at the weekend and see why it’s leaking. I’m guessing a seal etc.

tractor Dave · 30-06-20, 09:11 PM

Ok, I will have a look tomorrow. I got some spares with the car and I think there might be one of those in the box.

StoutyBoy · 30-06-20, 09:54 PM

Great; thanks!

tractor Dave · 01-07-20, 07:36 AM

I have this.

Sent from my iPhone using Tapatalk

tractor Dave · 01-07-20, 07:48 AM

Looking at 7 Zap I think what I have is the block valve that the bomb fits to. Sorry.

I am planning on doing a brake servo upgrade so will have the part going spare but not for a few months.

StoutyBoy · 01-07-20, 07:59 AM

Ah ok thanks. Yes I think this is the unit below the bomb with the pressure switches fitments. The booster is on the back of the master cyl against the bulkhead on the right of the engine bay.

I’ll get mine off and hope that we can affect a repair etc. appreciate your time looking etc. Thanks

Hanuman · 01-07-20, 09:21 AM

I believe the item in question is #1 (857612107A ) in the above photo.

Ultimately, it is a servo. In a vacuum system, there’s the big round cylinder, in a hydraulic system it’s this.

I’m editing my reply as I go along.

http://bmw8.us/Brake%20Booster%20Rebuild.htm
This page looks familiar. I’ve not got the time to read it through to be sure. I gathered from a thread some time ago (classic audi, S2, or somewhere), that someone like this was either refurbishing units, or alternative able to supply kit to DIY refurb.

StoutyBoy · 02-07-20, 07:15 AM

Ok great. I’ll look into that. Appreciated

Hanuman · 07-07-20, 02:04 PM

Among all my spares is a brake booster, clearly in need of Overhaul. I’m going to buy a couple of seal kits, and add the job to my list of lockdown tasks to keep me occupied*.
At least it’s something that can be done in the office rather than among the garage clutter.

*as if I didn’t have enough to do.

30-06-20, 07:33 PM	#11
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Often called a servo but brake booster is what the manufacturers call it. I've got a spare but it's from an MB and I'm sure the WR uses a different version. ATE Classic may be worth contacting - even just to find out if rebuilding is an option. __________________ 1991 90 quattro 20v sport 1991 90 quattro

01-07-20, 09:21 AM	#18
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,006	I believe the item in question is #1 (857612107A ) in the above photo. Ultimately, it is a servo. In a vacuum system, there’s the big round cylinder, in a hydraulic system it’s this. I’m editing my reply as I go along. http://bmw8.us/Brake%20Booster%20Rebuild.htm This page looks familiar. I’ve not got the time to read it through to be sure. I gathered from a thread some time ago (classic audi, S2, or somewhere), that someone like this was either refurbishing units, or alternative able to supply kit to DIY refurb. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor Last edited by Hanuman; 01-07-20 at 09:34 AM.

07-07-20, 02:04 PM	#20
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,006	Among all my spares is a brake booster, clearly in need of Overhaul. I’m going to buy a couple of seal kits, and add the job to my list of lockdown tasks to keep me occupied. At least it’s something that can be done in the office rather than among the garage clutter. as if I didn’t have enough to do. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

30-06-20, 08:31 PM	#12
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Thanks Mike. Yes booster is what I knew it as. Best bet is to remove it at the weekend and see why it’s leaking. I’m guessing a seal etc.

30-06-20, 09:11 PM	#13
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,157	Ok, I will have a look tomorrow. I got some spares with the car and I think there might be one of those in the box.

30-06-20, 09:54 PM	#14
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Great; thanks!

01-07-20, 07:36 AM	#15
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,157	I have this. Sent from my iPhone using Tapatalk

01-07-20, 07:48 AM	#16
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,157	Looking at 7 Zap I think what I have is the block valve that the bomb fits to. Sorry. I am planning on doing a brake servo upgrade so will have the part going spare but not for a few months.

01-07-20, 07:59 AM	#17
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Ah ok thanks. Yes I think this is the unit below the bomb with the pressure switches fitments. The booster is on the back of the master cyl against the bulkhead on the right of the engine bay. I’ll get mine off and hope that we can affect a repair etc. appreciate your time looking etc. Thanks

02-07-20, 07:15 AM	#19
StoutyBoy Grown up member Join Date: Sep 2015 Location: Sussex Posts: 95	Ok great. I’ll look into that. Appreciated