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Brake MC Proportioning Valve Removal?

260DET
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GTSBoy Grand Master

GTSBoy

Posted
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Hi Richard,

My 2c is that seeing as I have never seen an external proportioning valve on a Nissan of the R3x era....then you'd expect all the BM44/50/57 type MCs to have prop valves inside.

As to how to remove it so that the MC keeps working......dunno.  I have heard tales of people removing the prop valve and having the pedal go to the floor because removing it makes the back half not work properly.  Dunno if there was a better way for such people to do it than what they did, and I've not played with it myself.

Have a look at this thread off SAU here, for some clues (not clues that answer all your questions, but clues nonetheless)

 

 

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260DET Experienced

260DET

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Pretty sure that a Patrol has a one and 1/16" BMC so the one I have may not have a prop valve. Shouldn't be too hard to remove the piston and see what if anything is behind it.

260DET Experienced

260DET

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OK to wrap this up (if it all works lol)  I got a  Patrol JB1775 MC which has only two outlets and no prop valve. The GTR one I have has a non removable prop valve and is specced for the Brembo front caliper models so it's no good for me and is for sale.

KiwiRS4T Grand Master

KiwiRS4T

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20 hours ago, 260DET said:

OK to wrap this up (if it all works lol)  I got a  Patrol JB1775 MC which has only two outlets and no prop valve. The GTR one I have has a non removable prop valve and is specced for the Brembo front caliper models so it's no good for me and is for sale.

I would be inclined to give the GTR M/C a go. "Specced for the Brembos" sounds more scientific than it probably is. I used a GTR M/C on my AWD Stagea with 330mm brakes on the front and 2 pot GTR calipers on the rear  and it pulled up fine at any speed. Incidentally when I rebuilt the M/C it was with a ZX kit.

260DET Experienced

260DET

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Posted (edited)

The Patrol MC is the same size, it just doesn't have a inbuilt prop valve which is what is not wanted when a separate adjustable prop valve is used.

Edited by 260DET

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