Teeves ABS Mkii Hydraulic Actuator

[enjoyingtheride]

Help (UK based) - can anyone point me in the direction of a company that rebuilds these ? They were fitted to a large variety of vehicles in the late 80's early 90's, in my case a Jaguar XJS but also Passat and a variety of American Fords etc.

Current situation is brakes were working fine after taking car out of storage. However I fitted new pads but just shoved the pistons back rather than open the bleed nipples to let the displaced fluid exit the system, which is the approved method. Within a 3 mile drive the brakes suddenly stopped working. There are 7 hydraulic solenoid valves. When powering them up externally, 6 click and one takes current but does not move. So I think I have one outlet valve wedged open with debris from the fluid I shoved back. the Workshop Manual warns that the actuator is sensitive to debris which is the justification they give for the "open the bleed nipple" story when fitting new pads. A new actuator is a stonking £1,700.

I am going to try a strip and clean of it today. Are normal O rings compatible with Dot 4 fluid ? There are bound to be some between the halves of the aluminium housing.

[9000aeroman]

Hi,

Did you ever get an answer from anyone about rebuilding these units? I have the same basic system on my 1994 Saab 9000 Aero, in my case ABS MkII with traction control (TCS). I also have a 1996 9000 Aero with conventional vacuum servo assisted brakes/ABS and the brake performance on this car is noticeably better than on the 1994 Aero. I'm wondering if a strip down and rebuild of the hydraulic unit would improve matters. I have a complete spare hydraulic unit so I could try that one but I'd rather strip it down and rebuild off the car before fitting it. ATE Classic have been no help at all in my quest to find out if these units are rebuildable

If I helps, I do have a load of SAAB technical info on the ABS MkII system. I expect a lot of it is relevant to other vehicles fitted with the system.

Cheers

David

[enjoyingtheride]

hi aeroman. Nobody replied either here or on the Jaguar World forum. I solved my own problem with a strip down. This involved de-soldering the solenoids. They were surrounded in a kind of jellyfied brak fluid. There was a cracking polish website on the system fitted to a Ferrari . I have not saved it on bookmarks. It was in english. This looks like the polish language equivalent, it certainly has the lovely sectioned views of the solenoids showing the two types, which is what I wanted to diagnose failure http://www.zssplus.pl/prace_dyplomowe/praca_3_teve... but then you might have enough documentation anyway.

But basically brake fluid did not ungum the single sticking solenoid but liberal application of agent wd40 did. Repeated jolts of 13.5 volts then got the non-working solenoid clicking again and I then assembled everything back together and it all started working like it had for the last 11 years of ownership.