Lucas DPS CAV pump diagram wanted

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spacebwoy

spacebwoy

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I've discovered that something is pressurising my fuel tank on my 2.5TD, after speaking to the guys at Windmill (local landy spot) they told me the diaphragm in the (Lucas) DPS pump has probably perished and to replace the little devil.

Well I got the replacement diaphragm, and I'm looking for an exploded diagram or workshop manual for the pump. I've been given some general advice, that I should take the housing off round the back of the pump and replace the diaphragm being careful to catch any screws and springs that fly off.

But I was hoping to gain some insight into where these things are likely to pop from while taking it off, any ideas?
 
Actually, I've found the solution:

Undo the bottom bolt first from underneath cos thats the bugger.
Then wedge somthing behind the faceplate and remove the top bolt.
Cop hold of the faceplate and remove the wedge being careful not to let the faceplate open till you're ready to catch the spring (but they're quite big and not so easily lost)
Then open the plate and there will be a spring, then the diaphragm then another spring.
Take out the lot and set the new diaphragm pin to the same depth as the dufferphragm then replace in reverse order.

Voila, no more diesel over your back wheel, more zoom!
 
Hi Spacebwoy,

Just wondering how much of a performance increase you have noticed after replacing this diaphram? Does it pull better up hills, accelereate up to speed better and generally feel to have more power, or just a little difference?

I have a 2.5 N/A (same engine as you, but with no turbo) and I do sometimes get a hiss when I open the fuel cap (not noticed it for a while)

-Pos
 
pos said:
Hi Spacebwoy,

Just wondering how much of a performance increase you have noticed after replacing this diaphram? Does it pull better up hills, accelereate up to speed better and generally feel to have more power, or just a little difference?

I have a 2.5 N/A (same engine as you, but with no turbo) and I do sometimes get a hiss when I open the fuel cap (not noticed it for a while)

-Pos
Click to expand...

correct me if im wrong but yours wont have a diaphragm
 
It should have shouldn't it? I have an old Lucas Cav. I thought they we exactly the same injector pump for that engine
 
The TURBO Lucas CAV injection pump has an added doo-dah on top with a diaphragm in it that tells the pump to hoick in more fuel when the turbo is stuffing in extra air,

Ornery injection pumps on N/A engines don't have this bit on top.

CharlesY
 
It's made a VAST difference actually, it pulls like a bloody train now. it used to be gutless uphill on the motorway now I can rail past cayennes (ok that's a lie but...) I'm no longer holding up the traffic it's the other way around.

HAPPY HAPPY HAPPY JOY JOY JOY:)
 
spacebwoy said:
I've discovered that something is pressurising my fuel tank on my 2.5TD, after speaking to the guys at Windmill (local landy spot) they told me the diaphragm in the (Lucas) DPS pump has probably perished and to replace the little devil.

Well I got the replacement diaphragm, and I'm looking for an exploded diagram or workshop manual for the pump. I've been given some general advice, that I should take the housing off round the back of the pump and replace the diaphragm being careful to catch any screws and springs that fly off.

But I was hoping to gain some insight into where these things are likely to pop from while taking it off, any ideas?
Click to expand...
HI.
I also need to replace the diaphragm on the Cav pump of my 90 turbo diesel from 1990. Replacing it is simple. Where did you purchase the part?
 
spacebwoy said:
I've discovered that something is pressurising my fuel tank on my 2.5TD, after speaking to the guys at Windmill (local landy spot) they told me the diaphragm in the (Lucas) DPS pump has probably perished and to replace the little devil.

Well I got the replacement diaphragm, and I'm looking for an exploded diagram or workshop manual for the pump. I've been given some general advice, that I should take the housing off round the back of the pump and replace the diaphragm being careful to catch any screws and springs that fly off.

But I was hoping to gain some insight into where these things are likely to pop from while taking it off, any ideas?
Click to expand...
HI. Here you have the data of the pump you are working on.

injectionpumps.co.uk

CAV DPS manuals - Diesel Injection Pumps

Lucas CAV DPS applications: DELPHI DPS 8520A740A Fiat Allis Iveco 8045.05 DELPHI DPS 8520A740A Fiat Allis Iveco 8045.05 DELPHI DPS 8520A013A VW Golf / Jetta 1.6 D CR, JK DELPHI DPS 8520A020A VW Golf 1.6 D CR, JK DELPHI
injectionpumps.co.uk injectionpumps.co.uk
Greetings from little Slovenia
 
Enny said:
HI. Here you have the data of the pump you are working on.

injectionpumps.co.uk

CAV DPS manuals - Diesel Injection Pumps

Lucas CAV DPS applications: DELPHI DPS 8520A740A Fiat Allis Iveco 8045.05 DELPHI DPS 8520A740A Fiat Allis Iveco 8045.05 DELPHI DPS 8520A013A VW Golf / Jetta 1.6 D CR, JK DELPHI DPS 8520A020A VW Golf 1.6 D CR, JK DELPHI
injectionpumps.co.uk injectionpumps.co.uk
Greetings from little Slovenia
Click to expand...
injectionpumps.co.uk

Lucas CAV DPS fuel injection pump boost diaphragm and piston - Diesel Injection Pumps

Lucas CAV DPS fuel injection pump diaphragm commonly fitted to some Land Rover and Ford Transit vehicles. This is a quality aftermarket part If you only need the rubber membrane it is also available HERE
injectionpumps.co.uk injectionpumps.co.uk
 
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