tottot
Well-Known Member
I have not ever seen one of these in the flesh, most series that had a servo had a flap device in the inlet manifold to provide the vacuum [ pretty rubbish ]. For yours to work both inlet and outlet need to be open.
To test pump remove pipe and with engine running [ careful as rotating parts near ] and put a finger over each pipe in turn. One should suck and one should blow. Pipe needs to be on the one sucking the other should be left open.
To test pump remove pipe and with engine running [ careful as rotating parts near ] and put a finger over each pipe in turn. One should suck and one should blow. Pipe needs to be on the one sucking the other should be left open.
steve2286w
Well-Known Member
the standard set up uses the inlet manifold for vacuum as tottot says this then Tees off and one goes to servo and th either to a vacuum reservoir storage tank , to make it work well the butterfly valve needs to be adjusted properly using the adjustable levers
I have not seen a vacuum pump like that before. My series three ha the butterfly arrangement on the inlet manifold, as stated before a bit of a rubbish set up.
Add on to the poor set up of butterfly arrangement 30+ years of wear and you will never get it working well.
My solution was to bin the butterfly and blank off then fit an electric vacuum pump triggered from the brake light switch. Two hours work and sub £100 all in.
Add on to the poor set up of butterfly arrangement 30+ years of wear and you will never get it working well.
My solution was to bin the butterfly and blank off then fit an electric vacuum pump triggered from the brake light switch. Two hours work and sub £100 all in.
Jules59
Member
Certainly no butterfly valve on this diesel's inlet manifold that I can see.
Jules59
Member
Yes will do but wont be able till friday.
Interesting. Which Vac pump did you use pls ? I'm toying with an electric conversion on our 300Tdi's
Disco 1 BFG, From memory I used a Hella U28 or maybe a U30 ? I sold the series three a while ago so can't check.
I bought the vacuum pump from a Dutch supplier new for around £70 (badged as a Volvo part). Very simple to fit triggered via a relay from the brake light switch. It transformed the hit and miss servo flap arrangement into a reliable works every time set up. The only downside was that I could hear the pump working when sitting with my foot on the brake peddle. Chris.
I bought the vacuum pump from a Dutch supplier new for around £70 (badged as a Volvo part). Very simple to fit triggered via a relay from the brake light switch. It transformed the hit and miss servo flap arrangement into a reliable works every time set up. The only downside was that I could hear the pump working when sitting with my foot on the brake peddle. Chris.
Blackburn
Well-Known Member
Quite a few options on ebay
https://www.ebay.co.uk/sch/i.html?_...3&_nkw=Audi+12v+electric+vacuum+pump&_sacat=0
https://www.ebay.co.uk/sch/i.html?_...3&_nkw=Audi+12v+electric+vacuum+pump&_sacat=0
