Black_Hat

Boost stopped because the car couldn't and the weather is perfect .
1991 was a long time ago. The next thing to wear out with an unreasonably expensive replacement cost is …...the electronic brake booster.
I flushed the brake fluid once a year , including the bomb and electric pump. I’ve already changed the green pressure switch 2 times.
So it looks like the pressure switch went out again but there are signs of the pump leaking and the pump does not sound so strong.
The link below claims to exchange pumps – they don’t sa what they do…… I will contact them. They charge 1k $ minus 200$ core.

Anyone have any feedback on these guys?.




http://www.invasionautoproducts.com/...335505301.html

I’ve attached some pics. Its a simple pump with 2 seals -one circular / flat seal 58.50mm outside diameter and a small shaft seal a double lipped spring loaded seal.
Anyone have any idea where to get these seals in brake fluid safe material ?.


Part numbers :
964 355 053 51
964.355.053.52, 96435505352
Superseded To 964.355.053.52, 993.355.953.01, 10.0511-9025.1, 10051190251, 99335505350 993.355.053.50
Year 1989-95

ATE 0427 0771 3

found this link , looks like one could find a work around if needed :
http://www.powerbrakeservice.net/teaelhybrbop.html


Stefan
http://forums.pelicanparts.com/911-9...rced-deal.html

ralt

Always exciting when you have a brick for a brake! Nothing more of a rush than not being able to stop!! best get a new one

urquattro20Vt

Well that's a bummer. Please let us know what you figure out - much appreciated.

Brandon

Metal Guru

Black_Hat

Cannot find anything on the ATE site not for porsche or ferarri . searched both US and EU.
This is a simple pump and a simple electric motor - just need 2 seals , a new pressure switch and have a local electric shop re-bush / re-brush the motor.

Still looking. i have my German relatives looking.

paul_boivin

I had mine replaced with a 2nd hand 993 pump after mine gave up.
Goodluck

sprn72

Hello,

Has anyone found the part number for the internal seals of the pump?
indeed, I would like to change mine but I can't find the reference of these anywhereThanks

Patrick L

Please check my thread :
https://rennlist.com/forums/964-foru...-the-seal.html
There is no separate part but I bought one at local seal shop, the size is 53.7mm x 1.78mm EPDM rounded seal.
Hope this helps.

sprn72

Hello Patrick,

Thank you for your return.
I try to sell it on internet.
Thanks a lot

wicks

I always love hearing failed brakes stories that don't involve damage to cars or humans!