Krisboats Posted September 16, 2007 Report Share Posted September 16, 2007 So im not in the right for saying,when you run water into the bath the force of the water coming out the tap into the bath water creates oxygen bubbles,(you can see it happen when you run a bath) which then dissolves into the water (or rises) so when you bleed your brake, air can get in.....Yeah thats partially true but you didn't say that in the first place. Besides, the air bubbles don't just stay in the water, they quickly rise to the top as air is lighter than water, so within a couple of minutes there'll be virtually no air bubbles in the water. The idea of a bath bleed is to pump the water through the brake backwards and forwards until you don't get any air bubbles coming out from inside the brake. If theres no air bubbles coming out, theres no air in the brake so no, air doesn't "get in". Quote Link to comment Share on other sites More sharing options...
pengsmelly Posted September 16, 2007 Author Report Share Posted September 16, 2007 there amazing just done mine its so easy did in like a minute ikn the bathye you did it in my bath. lol Quote Link to comment Share on other sites More sharing options...
Kieran@ZSClothing Posted September 16, 2007 Report Share Posted September 16, 2007 ye you did it in my bath. lolWhat is it with you to and doing it in the bath , water bleeds are amazing and oil sucks thats my opinion, i've had the same water bleed in my brake for over 8months now and have had no problems.Adam, Quote Link to comment Share on other sites More sharing options...
Vee Posted September 16, 2007 Report Share Posted September 16, 2007 Iv read this and people say all the oxygen in water and all this and then others saying just because its in the air dosent mean water will be like that etc... Your all wrong!Its true that when its in water its nothing like air..... until it heats up, then oxygen escapes and creates bubbles. Has anyone ever left a glass of water on the side and in the morning looked and theres little bubbles all around the glass?And as for the distilled, that only prevents build up of limescale and stuff, which isnt going to happen. But if you want to use distilled just get ironing water, its 52p per litre and smells like lavender!! (I work at tesco lol)Vee Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted September 16, 2007 Report Share Posted September 16, 2007 (edited) you can buy de-ionised water from many places, including halfords, its cheap and is peeeerfect for magura rim brakes!oh, and use syringes to bleed, but do it properly, i seem to be able to get a better bleed with that method when compared to using the 'bucket' method.also lads, a good way to get out any air from the actual water itself, its to use the method of degasification! just pull back the plunger of your syringe whilst you put your finger over the top of the syringe, you will see the air come from the water and rise to the top. this means that any air that would have been in there, will be out. as a result of this your maggie internals wont corrode as quickly!degasification Edited September 16, 2007 by WILL ARNOLD Quote Link to comment Share on other sites More sharing options...
Simpson Posted September 16, 2007 Report Share Posted September 16, 2007 How would Boyles law relate to this water bleed and air liberation debate.Urm it wouldnt? cos partial pressure if to do with gas's not liquids?Ok well to put it more simpily. If you put your brake in a bowl of water and fully submerge it and still manage to get air into the system... then your a bit of a spak to be honestNot just evaporation? Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted September 16, 2007 Report Share Posted September 16, 2007 Ok well to put it more simpily. If you put your brake in a bowl of water and fully submerge it and still manage to get air into the system... then your a bit of a spak to be honestharder than you think to chase all the air out of the system when it is all in a loop under water! best is to have it so the slaves are significantly lower than the master, with a syringe on the slaves pushing water and air to the master, and out of the system! Quote Link to comment Share on other sites More sharing options...
Simpson Posted September 16, 2007 Report Share Posted September 16, 2007 harder than you think to chase all the air out of the system when it is all in a loop under water! best is to have it so the slaves are significantly lower than the master, with a syringe on the slaves pushing water and air to the master, and out of the system!I did it the other day, pulled out the seal underwater.. pumped all the air out... i then took it out the water pushed the seal in and forced the lever back into place... and it was over bled so the pistions were sticking out when the lever wasnt pulled... so i undid the bolt on the lever and let a lil bit of the water come up before nipping it back up... nicest lever feel ever now... this is on a dengura btw Quote Link to comment Share on other sites More sharing options...
JaMmY Posted September 17, 2007 Report Share Posted September 17, 2007 My local bikeshop tryed to pursuade me and pengsmelly to buy a 40 pound magura bleed kit because he said water is rubbish but found out it is amazing. Quote Link to comment Share on other sites More sharing options...
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