Rated 5 out of 5 by Anonymous Good
Expensive for what it is, but fixed a sticky piston I had in a Juicy 7 Carbon. I needed around 145psi on the stuck side to get it out and when it did, it was like a bullet!!
Make sure you lube with brake fluid before re-building
11 March 2011
Rated 4 out of 5 by Anonymous Alternative to getting old pistons out
I couldn't get enough pressure into the caliper using my track pump to pop out the old pistons as the seal wasn't good enough (following the instructions in the 2009 Technical Manual - downloaded from the SRAM website). I decided to try my shock pump and to my pleasant surprise, the thread screwed into the base of the banjo hole on the inboard caliper body half. The seal worked perfectly and after a few strokes, out popped the piston, with quite some force. I can't say if it also works for the outboard caliper body half, but I doubt it as there's not thread in the bottom of the banjo hole.
19 September 2010
Rated 4 out of 5 by Anonymous Expensive for what they are, but that's AVID for you.
1.Get the free piston out first by pumping the lever.
2. Split the caliper and use your track pump and an 'air-bed' nozzle in the hole where the banjo bolt came from. Aim it away from you at something soft, keep going, it'll come out eventually, with a BANG usually!
3. Coat the new 'dry' seals, o-ring and the sides of the pistons with some red rubber grease, you can get this from 'good' motor factors, this'll keep the pistons free and won't be affected by the brake fluid (Something AVID obviously forgot to do...)
4. Wipe the caliper with Isopropyl to neutralise any brake fluid/grease.
Any problems, give me a shout!
14 January 2010
Rated 5 out of 5 by Anonymous Does the job
I tried the method described above but couldnt get a good enough seal when connecting my pump. In the end I bought a pair of straight molecrips for a tenner and clamped one side, then just pump the lever and the piston will pop out. Split the halves, change the piston and repeat for the other side.
Quite easy in the end.
05 November 2009
Rated 4 out of 5 by Anonymous Useful info
The kit itself is great value at £5.99. Note that if you have older Juicys the piston will have a metal pad retaining pin. That is the little pointy bit in the middle of the piston. Why this is worth noting is that the piston kit here is the later pistons with a ceramic pin. As I have discovered to my cost, if you lose one or both pads mid ride by being clumsy fitting in a pair of pads for example, and apply the brakes, then the ceramic pin will wear down and make the piston forever useless as it will not retain the brake pad.
If you want advice on fitting read on. You will need a track pump with a Presta fitting and a tiny G-Clamp. With the system intacked, remove the pads, push in one piston and pump the brakes until the other piston pops out, you might need a few goes at this. Split the caliper and remove the free piston and internal o-ring by using a sharp knife to lever out. A scapel blade is ideal. Clean then apply some clean brake fluid to the inside grove. Fit the new o-ring and apply brake fluid to the new piston and push in. Reasemble the caliper and using your tiny g-clamp retain the new piston. remove the hose from the lever end and attach the olive into your track pump Presta fitting (a bit of a push) Pump up until the other old piston is free. it might not come fully out with the clamp in the way, (if that is the case be careful releasing the presure in the system by opening up the banjo fitting slightly. You should be able to get the piston out with some effort and some pliers. Fit the other new piston as before, fit the new transfer port o-ring (the small o-ring in this kit) apply a bit of brake fluid to the hole and reassemble. Clean with brake cleaner and bleed the system. Job done.
21 January 2008
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