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Discussion Starter · #1 · (Edited)
I need some advice on rebuilding my brembo pr18 master pump.

Reason: mushy lever, resulting in fading after 15 minutes on track with no brake performance left.
Why: bleeding the system does not improve the situation, nor does new oil. I have bled from bottom and top, and with a professional vacuum system.

So, I see two areas of interest here:
1: seal of master pump piston itself.
2: the rubber seal between the reservoir and the pump.
3: caliper seals

I want to focus at nr 1 and 2, as kits are readily available for calipers...

As the system is 'not rebuildable' I wondered if nobody has done this before? There must be some aftermarket seals available?

What to look for (partsnumbers etc)

Thanks in advance!

JENS
 

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Discussion Starter · #3 ·
So I contacted gothamcycles, but they only mentioned the dust seal, not the 'pressure' seals.

I will open the pump, and see what kind of seals are required... maybe the 18mm cupseals of the full radial pump would work...keep you all posted...

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Jens,
This is the kit I purchased for the repair. Last time I used the brakes I was 220kph and my fuel tank was on fire, I can say with conviction it fixed it pretty good.

As the kit is made by Brembo I would bet one exists for your model, I would send the picture and ask them as my kit was a stocked item.

Let us know how you get on.
 

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I need some advice on rebuilding my brembo pr18 master pump.

Reason: mushy lever, resulting in fading after 15 minutes on track with no brake performance left.
Why: bleeding the system does not improve the situation, nor does new oil. I have bled from bottom and top, and with a professional vacuum system.
maybe try this method;
if no luck look for debris on the piston cup seals?
if you find a internal kit let us know.
 

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Just pull the rubbers and take them to an automotive brake specialist and match them... that's what I did with the 15mm ones in my 748.
Bought a handful of both seals for peanuts.
 
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