juicy sevens

thefartingcockeral

Hi,
Just aquired a superb conditon 2nd hand cannondale. Set it up but the front disc brakes which are avid juicy sevens seem to be rubbing.
i have adjusted the red adjuster until it is out all the way but it seem to be still rubbing slightly.
Can anyone give me any advice.
Cheers

supersonic

Chek the rotor isnt warped, and the pistons are retractiong fully and evenly.

thefartingcockeral

Hi ands thanks,
If the rotor is warped I will get a new one. I dont think it is though, now cross eyed.
What can i do about the pistons?
Cheers

supersonic

Pistons, if are not performing correct, need to be cleaned with plain water, dried, then lubing with hydro fluid. Be careful not to push the pistons all the way out when the pads are removed, and not to get any oil on the pads (or use too much to lube)

stumpyjon

Push the pistons back in (carefully) with a large flat bladed screw driver, they should reset themselves automatically. Also you may need to realign the caliper if you haven't already done so (loosen the bolts holding the caliper on the fork bracket, squeeze the brake lever a couple of times, hold the lever tight and tighten the bolts again).
Link to PDF of the manual below.
http://www.sram.com/_media/techdocs/Jui ... nglish.pdf

SeanJ

If your rotor is warped you don't necessarily need a new one (especially when most new ones end up with slight warps as they're pressed metal). Get hold of a small adjustable wrench, turn the bike upside down and spin the wheel, where it rubs just gently bend the rotor out to the opposite direction, rinse and repeat until you've eliminated the rubbing and save yourself £15+

hamboman

stumpyjon wrote:

Push the pistons back in (carefully) with a large flat bladed screw driver, they should reset themselves automatically. Also you may need to realign the caliper if you haven't already done so (loosen the bolts holding the caliper on the fork bracket, squeeze the brake lever a couple of times, hold the lever tight and tighten the bolts again).
Link to PDF of the manual below.
http://www.sram.com/_media/techdocs/Jui ... nglish.pdf

when using the screwdriver, put two one pence pieces on top of the pistons and that way it spreads the pressure evenly

dave_s

You might also consider checking that the calipers are centred ok.
On Juicy Sevens, it's dead easy trick to loosen the caliper bolts partially so the caliper is loose.
Then pull the brake lever and hold it there and then just tighten the caliper bolts up again.
That works for me usually.

You can take minor bends out of rotors yourself with an adjustable spanner but make sure your calipers are centred first.