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Post by jaz66 on Jul 14, 2007 15:18:10 GMT -5
Hi Might be an easy problem for you 'Wrench' pro's But for me...Not so simple  Change brake pads, OK. Bleed brakes...OK But.....front brake lever feels 'Soft' Stops bike fine, but feels softer than before. Q.What should I check? I did remove entire brake unit as pistons would NOT give under 'hand' pressure, and I did have to use force to push pistons back. While doing this unit seperated.......almost. (It was the part that 'Expands' when you push on piston. I pressed it back into place and no harmed seemed to be done. Q. Have I f***ked my brakes or do I need to bleed them again (And what did I do wrong, if anything? )  All help appreciated cheers jaz |
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pops
New Member
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Post by pops on Jul 14, 2007 16:36:36 GMT -5
Jazz
You will need to bleed it again I have had the same happen when I changed the pads.You may think that you have al the air out but if you have still got that spongy feeling you have still got some trapped .Took me bloody ages to get it all out.
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Post by jaz66 on Jul 14, 2007 19:14:05 GMT -5
Hi pops Cheers for that, (So I aint F**ked brakes but I gotta bleed them again. Ok could be worse... ;D ) I assume I looked for 'Air' before and do so again or is it just 'bubbles' I am looking for? Again pops, cheers....wondered what I was going to do with my sunday,.. Now I know.....  Cheers Jaz |
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Post by derbyshirebill on Jul 15, 2007 3:29:05 GMT -5
Hi Jim, Pops is, as usual, spot on. If you get air in the system it sometimes takes ages to get out. The trouble is that the air doesn't always float to the top of the fluid straight away so it can be bled off: tiny bubbles stay in the fluid for a while. Quite often, I've found, if you leave the plot alone overnight things will have settled and you can bleed off the air. You can also sometimes see the tiny bubbles seeping up through the fluid in the master cylinder when you leave it alone.  As for the caliper coming apart (which I think is what you were describing), that's no problem. In fact it's good  . While it's apart you can clean the rods and holes and regrease them. Just make sure the rubber seals slip back into place so as to keep the crud out. Have fun, and resist the urge to wallop it with a big hammer if it don't go right immediately  Cheers, Bill |
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Post by jaz66 on Jul 15, 2007 5:28:51 GMT -5
Hi Bill Thank you sir, once again the masters of the NTV come to aid of the less'Experienced' members................. Thought I had bled it properly, but you are spot on. there was tiny air bubbles in bleed and in reservoir......So back to the 'Bleeding' Brakes.... I'm glad seperating brakes, was normal. (A slight moment of panic    as it came apart in my hands !) and it was the part you spoke of. Got to admit I was more concerned with getting it all back together, so I didn't clean it up, but now I know how easy it is, it's on my list for next time. Stangely enough I DO have a big hammer, ( You must be  !!! ;D,) nearly reached for it yesterday (as you do), but now it is residing quietly in my tool box......Until next time !! Cheers for help and advise guys  jaz |
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pops
New Member
Posts: 16
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Post by pops on Jul 15, 2007 7:11:50 GMT -5
Hi Guys Thought you might be interested in seeing my little set up for filling and bleeding front and rear brakes on the ntv. Bolt the respective plate to the res,fill the bottle with ample fluid I connect this to my compressor set at 10 psi. open the bleed valve and let it do the bis,works a treat. |
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Post by dpmiller on Jul 15, 2007 12:19:03 GMT -5
Once you get most of the air out, the trick is (with the bike on the sidestand so the mastercylinder is sloping upwards) to rapidly "tickle" the brake lever. Not full applications, just enough to click the stoplight switch. That'll loosen all the tiny bubbles, and you'll see them escape through the recuperation port inside the reservoir.
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Post by hovis on Jul 15, 2007 13:14:37 GMT -5
being a tight git i spent a whole 70 pence on a length of plastic transparent hose from a car accessories shop,the kind used to squirt water onto your windscreen and a small used nescafe glass jar,simpily half fill jar with brake fluid insert one end of tube into it ,other on to bleed nipple and away you go,simple and cheap,
Just remember to keep topping up your brake reservoir as you go along,dead cheap and dead simple.
Everybody has their own variation ,as long as you get all the air out the system jazz.
Hovis
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steve
New Member
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Post by steve on Jul 18, 2007 15:29:27 GMT -5
Interesting twist on beading the breakes is to do it the other way round.
I've been doing it the standard maintenance way for years then another Forum suggested that you pump fluid into the caliper via a syringe (stay with me) & then all the air bubbles are forced upwards into the reservoir (which in turn get's quite full). Once the air is in the reservior, as air obviously rises - it all disappears.
I used the method on my other twin front caliper bike and it worked like a dream. Nothing ventured and all that.
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Post by jaz66 on Jul 18, 2007 17:16:17 GMT -5
Hi all MMhhh seems we all have a certain way of Bleeding the brakes, some good and some slightly unusual, but all have merit... Hovis: I have something very similar from when I used to do the car, (Pot, Plastic tube, One way valve) But still a nice, cheap idea. Steve: Unusual and thought provoking, may give that a go, kinda makes weird sense, (if you know what I mean) Pops: Nice idea but don't have access to a Compressor.... dpmiller: Tickling my BRAKES! Whatever next.... Nice to see so many out there taking the time to help a fellow member, what a great bunch you are... Enjoy & ride safe Jaz |
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. While it's apart you can clean the rods and holes and regrease them. Just make sure the rubber seals slip back into place so as to keep the crud out.
as it came apart in my hands !)
