servo problem?

[jonnydurex]

finally getting round to sorting my brakes out!! was getting air in the system from either the master cylinder or the servo so seeing as i have a spares car with superb brakes i decided to change them both just to be on the safe side....master cylinder swap was straight forward but servo had same body but different vacuum housing...so the plan is to just swap the vacuum housing over.i`ve seperated both the units and found the one i`m replacing to be full of brake fluid,i`m guessing this isnt right as the one i know to be ok wasnt!!....this means there is a seal gone in there somewhere!!! but is it in the vacuum housing or the main workings? also both the gaskets are way beyond saving..can i use some instant gasket? if not where do i get one from???

thanx

jonny

 

[Demetris]

finally getting round to sorting my brakes out!! was getting air in the system from either the master cylinder or the servo so seeing as i have a spares car with superb brakes i decided to change them both just to be on the safe side....master cylinder swap was straight forward but servo had same body but different vacuum housing...so the plan is to just swap the vacuum housing over.i`ve seperated both the units and found the one i`m replacing to be full of brake fluid,i`m guessing this isnt right as the one i know to be ok wasnt!!....this means there is a seal gone in there somewhere!!! but is it in the vacuum housing or the main workings? also both the gaskets are way beyond saving..can i use some instant gasket? if not where do i get one from???

thanx

jonny

Am i right in thinking that what you 're refering too as "vacuum unit" is actually the air valve?

In any case since servos are notorius for ingesting fluid from bad seals, it is worth rebuilding before fitting anything. They are not that hard to. I believe that almost all specialists (take a look at the relevant section of this site) carry out rebuild kits. If the big mebrane is OK you won't need the expensive full kit. But if the air valve membrane is bad as you say, you'll have to buy a kit for the air valve too.

 

[jonnydurex]

the Haynes manual refers to it as the "vacuum unit" also bit confusing too as the unit is a Girling one but has Lockheed stamped down the side of it...was hoping to get this done quickly but if i`ve got to wait for a new gasket to arrive then i may as well get the small rebuild kit...glad i did this on my workmate outside my garage...fluid went everywhere lol

 

[Pilkie]

finally getting round to sorting my brakes out!! was getting air in the system from either the master cylinder or the servo so seeing as i have a spares car with superb brakes i decided to change them both just to be on the safe side....master cylinder swap was straight forward but servo had same body but different vacuum housing...so the plan is to just swap the vacuum housing over.i`ve seperated both the units and found the one i`m replacing to be full of brake fluid,i`m guessing this isnt right as the one i know to be ok wasnt!!....this means there is a seal gone in there somewhere!!! but is it in the vacuum housing or the main workings? also both the gaskets are way beyond saving..can i use some instant gasket? if not where do i get one from???

thanx

jonny

the seals are in the main cast cylinder body with the brake pipes attached, its best and easiest to change the complete unit over,the 2000 and v8 servo's are different sizes,v8 is bigger and may well fit onto the 2000 as an upgrade.

 

[jonnydurex]

the vacuum unit from my 2000 is a inch smaller in diameter and a little bit deeper but the mounting is totally different...the V8 one bolts directly to the inner wing and the smaller one has mounting studs on the other side....could have used some superglue at a push!

have put it all back together and used some instant gasket between the two...just giving it a good few hours to go off before I put it back on later