Thread: Brake pressure reduction valve - reseal?

What's the vehicle? D1, I presume. I wouldn't attempt a repair on the exisiting, but I would get one from a wreck (easily sourced) and install it, bleed the brakes and continue happily on my way.

Pete

Thanks Pete.

Yep, it's a 98 D1. I couldn't find reference to a seal kit anywhere so presumed it was a replacement job.

I've found a new one (aftermarket) is about $125 delivered from the UK, so will go that route I think, rather than an unknown one from a scrappie.
I'm going to be replacing the brake fluid before it goes anywhere, and replacing flexible hoses with +2" ones, so all the bleeding will be done at once. One more part to add to the list I suppose!

Are you sure its leaking from this valve? Far more common is for the reservoir to leak from the seal under the booster end of the reservoir. This seal is available separately without buying a whole kit. I have fitted 4-5 of these since I found this out.

Originally Posted by bee utey

Are you sure its leaking from this valve? Far more common is for the reservoir to leak from the seal under the booster end of the reservoir. This seal is available separately without buying a whole kit. I have fitted 4-5 of these since I found this out.

bee utey, I'm positive it's the brake pressure reduction valve, mainly because it's the opposite side of the engine bay to the main reservoir! (Left hand side of the bay as viewed from the driver's seat).
And I can see that it is dripping onto the brake line, rather than running down from where the line connects into the valve.

So, back from the UK for a day or seven after a mercy dash across there a few weeks ago, and back onto the Disco (still not finished yet!).

So I ordered and installed a new one of these Brake Pressure Reducing Valves (part ANR3194 - AP branded OE spec item) before I left, but only got around to attempting to bleed it through on Thursday. And no matter what I do, I cannot get any brake pressure to the rears.
I have bought a vacuum style bleeder, but can't get anything more than a few drops of fluid out (I installed new stainless flexible hoses all round, so there wasn't much of the old fluid left in).
There's plenty of pressure behind the fronts, so the valve is letting something through at least.
If I try pumping the brake pedal and removing the pipe to the rear, literally only a drop or two of fluid comes out of the top of the valve. I tried screwing one of the bleed valves from one of the rear wheels into the top of the valve, and hit it with the vacuum bleeder, but still only a drop or two.

Any ideas? Have I done something wrong to it? Or have I just bought a bad 'un?

ABS/non ABS? Master cylinder has been bled? Is there fluid pressure at the prop valve from the rear port on the m/c? Short of that, I don't really know...

Hope this might help... large whisky!

Pete

Originally Posted by Pierre

ABS/non ABS? Master cylinder has been bled? Is there fluid pressure at the prop valve from the rear port on the m/c? Short of that, I don't really know...

Hope this might help... large whisky!

Pete

Pete, there was pressure at the pipe leading to the valve from the m/c, yes. So I'm assuming that either there was some cack in that pipe that is now stuck in and blocking the valve, or the new part I bought was bad.

Still, back in the UK again, can nip down and get a new one.