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PostPosted: Tue Sep 11, 2012 12:52 pm 
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Joined: Thu Jul 31, 2008 12:20 pm
Posts: 162
Location: Hampshire UK
Hi all.

I have some early 2009 R1's which leak from the rear cap. I know this is a well documented issue but the Uk importer Silverfish aren't helping me.
The rubber diaphragm and cap have separated so need to be replaced. what cap do i need to order ?
I have the part number for the diaphragm FD-M062-25

Any help would be appreciated .


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Posted: Tue Sep 11, 2012 12:52 pm 


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PostPosted: Wed Sep 12, 2012 5:10 am 
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Joined: Sun Feb 25, 2007 1:26 pm
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Location: Australia
A distributor is Oz is- http://www.eightyonespices.com.au

He's a friendly guy passionate about MTB's and may be able to help.

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PostPosted: Wed Sep 12, 2012 12:46 pm 
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Joined: Wed Apr 25, 2007 10:23 am
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Location: Pack filler
Maybe give windwave a call?
I'm not sure if they are still a formula importer, but they've been more than helpful in the past, when i had evo's :)

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PostPosted: Fri Sep 14, 2012 11:52 am 
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Joined: Thu Jul 31, 2008 12:20 pm
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Location: Hampshire UK
Im still no further forward with this.

to the people who had the leak issues with early brakes. did Formula replace the rear caps with the 1 hole version or the 5 hole version?

Thanks


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PostPosted: Sun Sep 16, 2012 10:04 pm 
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Joined: Sat Apr 18, 2009 8:59 am
Posts: 539
Location: Surrey UK
I was in touch with the previous formula rep Propel. Toby was always very helpful guy!
I had the same issue with the first R1s. At that time Silverfish took over formula rep. Have to say no good experience at all. Replacing the cup took them about 3 weeks.
Speaking of which, I do not remember the number of holes, but the new one is black.

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PostPosted: Mon Sep 17, 2012 12:32 am 
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Joined: Wed May 19, 2010 8:52 pm
Posts: 104
I've had 2 sets of R1's leak. Sent them to back to the US hq and without question, fixed up, sent back and hooked me up with sweet Formula tshirt. Great guys over here.

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PostPosted: Thu Sep 20, 2012 5:35 am 
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Joined: Sun Sep 19, 2010 3:11 am
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lowpsihighspeed wrote:
I've had 2 sets of R1's leak. Sent them to back to the US hq and without question, fixed up, sent back and hooked me up with sweet Formula tshirt. Great guys over here.

I did the same, but mine started leaking again after they fixed them. Between that and the annoying pad rubbing issues, I gave up on them.


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PostPosted: Sat Sep 22, 2012 8:14 pm 
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sfer1 wrote:
lowpsihighspeed wrote:
I've had 2 sets of R1's leak. Sent them to back to the US hq and without question, fixed up, sent back and hooked me up with sweet Formula tshirt. Great guys over here.

I did the same, but mine started leaking again after they fixed them. Between that and the annoying pad rubbing issues, I gave up on them.


Can be tough without pad adjustment capability..

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PostPosted: Tue Sep 25, 2012 11:00 am 
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Joined: Thu Jul 31, 2008 12:20 pm
Posts: 162
Location: Hampshire UK
After a long slog I have some information.

Apparently a new replacement MC (master cap) and diaphragm will solve any leakage issue (these parts are bonded together, so if they have separated they will no longer be 'fluid tight').

Regarding a redesign, the 2011 R1 and The ONE master cylinder did see a massive redesign which although they look identical only share the MC piston and clamp. these redesigned parts are not a retro fit for the older model.

The MC diaphragm should ideally be replaced yearly as part of a regular service, this clever little bit of rubber is responsible for the keeping the lever feel the same through heat and pad wear etc so really does have a lot going on.

The part numbers for the replacement items is FD-M053-25 and FD-T031-05.


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PostPosted: Tue Sep 25, 2012 11:31 am 
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Joined: Fri Oct 16, 2009 10:43 am
Posts: 28
Location: Cambridgeshire - UK
I've also gone through the pain/costs> of having to replace the diaphragms/caps!

To remove the old cap, you need a pair of pin-nose pliers, to insert in to the holes, then undo anti-clockwise. Once the caps are removed, my advice is as follows:

-remove some (if not all) brake fluid from the lever/MC
-with a toothbrush, give the threads on the lever body a clean
-take the new cap/diaphragm and smear a tiny amount of silicone grease on to the cap threads
-place the cap in to the opening on the lever and thread it anti-clockwise > do this to find the start of the thread (you'll feel a very tiny 'notch' where the threads start) - this minimizes the chances of cross threading
-tighten the cap clockwise with the pin nose pliers - keep the pliers level and pushed-in hard, so stop them coming out of the holes. At the end of tightening, the cap gets really tight - keep going until it is in the correct position

Once replaced, give the brakes a full bleed. Another tip is when pushing/pulling the syringe attached to the lever (to remove trapped air) , do not push the syringe too hard, otherwise you can over-pressurize the system and blow the membrane.....

Good luck!


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PostPosted: Tue Sep 25, 2012 1:15 pm 
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Location: Midlands, United Kingdom
Wow, good info, given all that I'll stick with Shimano! :D

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PostPosted: Tue Sep 25, 2012 6:29 pm 
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Joined: Thu Jul 31, 2008 12:20 pm
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Location: Hampshire UK
I figure I've put in the region of 5,000 miles on these brakes with no maintenance. I think they deserve a few £ spent on them so new pistons and the bits mentioned above :D


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PostPosted: Thu Sep 27, 2012 8:44 am 
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Joined: Fri Oct 16, 2009 10:43 am
Posts: 28
Location: Cambridgeshire - UK
With Formula EVERY part is available as a spare to buy - unlike Shimano (which I why I ditched my XTR discs after the caliper pistons seals leaked, and was told I'd have to buy new calipers as the brakes were out of warranty...yeah, that's a real world solution!).

Formula are excellent brakes, they just need a bit more attention to detail when working on them.

If you're replacing the caliper piston seals as well, the best way to do it is to blow the pistons out using compressed air. This gets around the fact that you can't remove the bore cap as the tool isn't available to buy (however, Silverfish are offering brake servicing now, and they have all the tools).


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PostPosted: Fri Sep 28, 2012 8:04 pm 
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Joined: Mon Sep 14, 2009 8:51 pm
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Quote:
Uk importer Silverfish aren't helping me.

There's a surprise!
.
Go on french ebay (ebay.fr oddly enough) and type Formula R1 into the search thingy. Lots of spares come up in the results, all kinds. Pick a couple of suppliers and send them an email, that part number would help a lot I expect. I did this and managed to get a clamp for the lever, about £15 including postage.
Don't know why but there seems to be lots of R1 bits on the french site.

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Posted: Fri Sep 28, 2012 8:04 pm 


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PostPosted: Fri Sep 28, 2012 9:57 pm 
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Joined: Thu Jul 31, 2008 12:20 pm
Posts: 162
Location: Hampshire UK
I managed to get hold of t he parts needed so its just a case of a rebuild.
I hope they respond well to new diaphragms and pistons............ To be continued


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