jimmy
Getting started
Posts: 3
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Post by jimmy on Apr 1, 2010 17:53:21 GMT
Is there some one out there that could give me some advice ? I have a ZRX 11 that has got covered braided hoses fitted too front calipers, when i purchased it before winter the front brake was cr not good then, with glove on it would trap your fingers when applied ,i have since stripped both calipers made shaw all pistons are clean and free, rebuilt them and fitted new pads,I have bled them over & over again the normal way, back wards from caliper to cylinder but still travel is way too much ,the lever comes to about just less than a inch from the bars and it will hold there, the dial set is on the wright setting , running out off ideas now thinking look into master cylinder would have thought if seals were gone in cylinder the lever would seep into the bars, i don't know any ideas would be a great help many thanks ( jimmy ).
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Post by brakeline on Apr 1, 2010 18:29:40 GMT
Bit confused there Jim, how do you bleed the brakes backwards, are you pushing the fluid up the way to the brake cylinder, if so methinks thats your problem.
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Post by phoenix on Apr 1, 2010 19:02:29 GMT
Bleed it via the master cyl banjo bolt first so the fluid has something to 'grab' onto. Have plenty of rags to hand tho'.
If that doesn't work try zip tying the lever to the bars overnight & try again in the morning.
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Post by Burchy on Apr 1, 2010 19:33:36 GMT
No harm done if you dismantle the master cylinder piston assembly, clean it all up and replace it to try again. Better, though, to get a master cylinder repair kit to do the job thoroughly.
there's air in there somewhere, I reckon and I suspect the MC. Try moving the bars to either full lock position and gently pump the lever and see if tiny air bubbles come into the resevoir. probably best on full right lock, to get the resevoir as high as possible compared to the lever
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Post by wardourdrive on Apr 1, 2010 20:08:29 GMT
I tend to use a large syringe and go from the bleed nipple up to the master cylinder when refilling after a over haul.
Then carry out the normal checking such as pumping the lever and then zip tying over night etc.
Works for me
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jimbo
Getting started
Posts: 1
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Post by jimbo on Apr 1, 2010 21:39:19 GMT
cheers for that folks, when i said backwards i ment the same way has wardourdrive has explained, gone from the bleed nipple back up to cylinder then bled it has normal .the only other thing is that it does run through the cross over on the bottom yoke i am wondering if air could be lerkin in there. also thinking of trying the two lines straight from the cylinder to the calipers which would eliminate the cross over then ? thanks a load for the feed back folks jimbo.
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Post by kevrex on Apr 2, 2010 0:41:02 GMT
Bleed it via the master cyl banjo bolt first so the fluid has something to 'grab' onto. Have plenty of rags to hand tho'. If that doesn't work try zip tying the lever to the bars overnight & try again in the morning. Yeah that should do the trick
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Post by firmhand on Apr 2, 2010 6:31:42 GMT
One other thing you could try before disasembling the master, get a big spanner or similar and just go round both calipers (start with the one furthest away from the Res) and all the lines gently tapping them, this can help dislodge any air pockets you may have, you will see small air bubbles rising in the res. The other thing worth mentioning is when you pump the lever do it real slow 123 in 123 out, good luck and let us know how you get on.
Pete
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Post by brakeline on Apr 2, 2010 6:57:20 GMT
Strangely enough I've never had problems bleedin ma brakes, Just filled up the master cyl. and pumped it thru, no bother. Certainly ma brakes dont work, but, who needs em No they do work fine, but never had a problem bleedin them, never pumped fluid u from the caliper.
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Post by luckyphil on Apr 2, 2010 14:04:27 GMT
Hi there Jimmy, I had similar problems when I fitted Goodridge lines front and back early last year. The rear line was a piece of cake to fit and bleed, half an hour and done. The fronts...........very frustrating to put it mildly. Went through all of the techniques mentioned by everybody else, eventually got a reasonable pressure but I don't think it feels the same as before. I'm not going to fiddle with it again in case I lose what there is.
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Post by ezzazrx on Apr 3, 2010 6:02:12 GMT
Strangely enough I've never had problems bleedin ma brakes, Just filled up the master cyl. and pumped it thru, no bother. I'm with you there Brakey just put some clear hose on the nipple into a jar of brake fluid and pump away, did this after fitting braided lines with no problems
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jimmy
Getting started
Posts: 3
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Post by jimmy on Apr 3, 2010 6:55:04 GMT
thaks to each and every one of you,have tried all that has been mentioned eg pipe in jar, from bleed nipple back to cylinder , tapping hoses etc , but what i do know is that this aint wright and needs sorting out , i am sure it was nt like this when manufactured its a lot of bike that you need to be able to stop when needed . thanks all for your response & ideas . jimbo
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Post by kevrex on Apr 4, 2010 0:34:06 GMT
thaks to each and every one of you,have tried all that has been mentioned eg pipe in jar, from bleed nipple back to cylinder , tapping hoses etc , but what i do know is that this aint wright and needs sorting out , i am sure it was nt like this when manufactured its a lot of bike that you need to be able to stop when needed . thanks all for your response & ideas . jimbo Hope you get it sorted jimbo, as ezzra and brakey have said clear hose from the caliper in to a jar, just keep pumping until no air bubbles, then as you have some resistance as your pulling the lever in crack the banjo on the master cylinder as air can be trapped their,and tighten before you let go of the lever
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Post by Les on Apr 4, 2010 15:03:42 GMT
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jimmy
Getting started
Posts: 3
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Post by jimmy on Apr 25, 2010 16:38:07 GMT
A up chaps, i have now fitted the twin hose system from the master cylinder direct to each caliper, had the calipers apart again and cleaned them out nothing in there at all u could eat your jam butties out of them they are that clean, all fluid ways are spotless , brand new pads, brand new goodrich braide hoses, brand new master cylinder seal kit fitted, brand new fluid dot 4 ,have tested master cylinder by blanking off result is a fist full off lever so no problem there,bled at all banjo connections from master cyl to calipers ,bled about a gallon of fluid through the sytem so far, strapped lever in over knight gone to the next knight and the lever is still under pressure so there should not be any leakage anywhere,i have taken calipers off the fork leg and tipped one side and another whilst bleeding them ,purchased a mighty vac and drawn the fluid through with no air bubbles, bled both at the same time , tried slowly , fast & sharp ,continues pumping whilst hose is in fluid etc.if i was loosing fluid or what bit of lever i have got then i could under stand it but i aint . two weeks on and money spent and no further foreward. i did have some hair two weeks ago now i pollish my head with MR SHEEN . THANKS LADS FOR ALL .
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