Brake limiter valve

[Azazello]

I do not know the right english name (correcteur de freinage - correttore di frenata), but here it is mine:



I do not know if it is working properly, and I would like some info: is there any way to check if it is still in good conditions? Can I refurbish it in any way?
I checked new ones on the net too, and the only ones with the same shape I found on ebay.fr are listed for furgonette, two models: 40 and 45 bar.

http://pages.ebay.com/link/?nav=item.view&id=191591203308&alt=web

Is it suitable for my '75 r4 berline?

I really don't want to reassemble the car and found that the rear brakes are not working...

 

[Geoff in the Gully]

First, they are not really refurbishable. The manual says they can't be repaired. I've tried but there's a teeny tiny seal in the very middle that's practically impossible to get to.

The 'proper' way to test them is with a pressure gauge fitted in place of the bleed nipple on one of the rear wheels.

You can do a crude test of basic working. These things work by shutting of the fluid flow to the rear wheels. If you apply sudden pressure on the brake and hold it, the valve should shut off before there's enough pressure to stop the wheel turning.

 

[Piet]

Melun have them in their catalogue. It justs says 4L so I assume its for the saloon/sedan and not the fourgon.

http://www.melun-retro-passion.com/4l/RE_04/corrective-breake-3-ways-renault-id-348257.html

Not cheap, but not outrageous when you consider what new car parts cost, and you are paying for someone to organise a small production run of ultimately perishable parts and hold them on spec.

Actually that is not the correct part, or at least not exactly the same part. Early saloons (and I guess some early fourgons) had a single input at one end and a single output which then went to a junction to supply the two rear brake lines. The part number was 0854674400. Later, the saloons kept the simple one but the fourgons went to the later type with two seperate outputs and the actuator pushing in one end connected to the suspension so that it did not cut in when fully loaded. The PR 953 catalogue (1971-75) shows early for saloons and late type for fourgons. Finally, both cars and fourgons used the later type 3 way connected to the suspension.

So given the early type does not seem to be easily available, maybe we should consider refurbishment more closely.

 

[Azazello]

I bought this one on ebay:

Is the same shape of mine, and even if it says it was for a furgonette I hope it will work... 42 euros are a good investment.