Anyone got any tips on bleeding Hayes 9 brakes? Tried traditional open nipple squeeze lever lock nipple release lever still no good, tried forcing fluid from the calliper via bleed nipple not a brilliant result here either unless I am doing something wrong.
Also noticed that with the res cap removed and lever being pulled in causes the fluid to rise and perhaps even pressed hard enough a jet of fluid comes out.
I had real trouble when I tried, ended up taking them to the LBS to sort. But that was the first time I'd done anything with hydraulics so could have been me, but I think hey did say they were tricky. Was a while ago no so don't remember specifics. Someone with dome expertise will be along and give you some useful advice I'm sure!
I needed to open the whole system up. Bleed individual elements, connect the hose to the caliper, bleed them together. Add the lever, bleed the whole lot. Swearbox handy?
I've just followed the method from the hayes website with no problems at all.
From personal experience my suggestion for Hayes 9s :- remove lever from bike and place in a box, followed by the caliper. Seal box and throw in skip. Go and buy decent brakes. Immediate improvement in feel, performance, lack of faff and ease of bleeding.
wors +1
Fresh fluid goes into caliper with syringe, dirty fluid comes out from master cylinder. Get the little brass insert and a bit of tube for the mc port if you don't want fluid going everywhere.
Don't take the caps off at the lever!
Too late caps been removed and rest stripped before realising. Thank goodness they are not mine there a freinds mine are Hopes
Agree with skip comments (lol) but not what a roadie wants to here on his intro to MTB
only trouble i've had with hayes nines have been rubbing pads when replacing them. like dragging a bloody anchor around.
anyway i fitted a set to my 5 which involved a new hose, and have bled other sets i have too.
bike in the stand with the bars nice and high, lever rotated so the bleed hole is at the top, tube into the bleed hole, then into a bottle cable tied to the bar ( tube end should not be submerged ), BIG syringe full of fluid, and push.
flick the lever towards the end of the process, and the hose ,and the caliper. just bang it all around while maintaining pressure to move any small bubbles.
nip down the nipple. if you feel like it, tie the lever back and leave it like that overnight too, to encourage any remaining air up to the top end.