Spongy Hope Mono Mini

x-isle

I have a new Orange 5 Pro.

The brakes were great when it was new, a few rides in and the rear brakes went a bit spongy, so I thought I'd give them a bleed.

I can't seem to get great pressure in there. They work, but are still a little spongy, the fronts are still great, but I can't seem to get the rear to a similar pressure.

Anybody got any ideas?

Thanks

Splasher

Are you using a bleed kit or just pushing fluid through using the master cyclinder?

fasterthanaspeedingbullet

Don't know about your brakes mate but i've just had a look at your 'DogCam' setup and footage - fantastic! Can't believe how smooth it is.

x-isle

Not using a bleed kit, just pushing through, do they make that much difference?

Is this what you mean?

http://www.wiggle.co.uk/ProductDetail.a ... leed%20Kit

Thanks "faster", yeah the footage does come out remarkably well.

Splasher

Sort off. I think Hope still recommend you bleed the brakes down through the caliper but this means that you are trying to push any bubbles in the hose down to the caliper to clear them out and this can take ages.

Other manufacturers use a pair of syringes and you push fresh fluid into the caliper which flushes all the old fluid and bubbles up the hose and out the top of the master cylinder.

Either should work but you'll need to keep going with the traditional way. The hope vid is here if it helps. http://www.hopegb.com/page_mep_force_33.html

x-isle

Thanks for that.

I think it's probably to do with the way that the hoses are thread through the frame on the Orange 5. It means that you can't take the caliper off and keep the pipe straight.

cee

x-isle wrote:

Thanks for that.

I think it's probably to do with the way that the hoses are thread through the frame on the Orange 5. It means that you can't take the caliper off and keep the pipe straight.

Can you tip the bike up so the front wheel is higher than the back, then rotate the lever appropriately.....then the highest point in the hose should be where it meets the lever....

Then it wouldn't matter what the hose was doing inside the downtube *edit....

Just a thought.

*edit erm swingarm!

x-isle

Yeah, I was sitting at my desk in work when that brainwave hit and I thought about air in caught in the hose run. It might be that.

I've ordered a bleed kit, it nothing else, it makes it easier for one person to do it.

I've got a workshop stand so I'll give it a go.

stu8975

This is how i did mine (mainly for quickness), i would recommend doing it as on the Hope tech video if you want to flush the old fluid out and put new stuff in..


First remove wheel, pads to avoid buggering them up by covering them in brake fluid.put old pads in or something to stop the pistons popping out.
Attach pipe to bleed nipple, fill syringe with brake fluid and attatch to pipe, open bleed nipple 1/4 turn, press syringe so fluid goes into the caliper (you wont get much in so dont worry if it seems like there has only been a small amount of fluid transfered), pump the lever a few times until you see the trapped air coming into the syringe, press syringe again to top the fluid up, repeat until no more bubbles appear in the syringe, close bleed nipple and remove syringe and pipe, clean any escaped fluid then fit pads/wheel again...takes about 10-15 mins..brakes feel like new. Job done.
Bleed kit used is for Giant Mph brakes (syringe,pipe + other bit thats not needed), free from my local Giant dealer.