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| 99 X1 front brake lever travell https://www.ukbeg.com/forum/viewtopic.php?f=8&t=13965 |
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| Author: | WILLYBUELL [ 27 Mar 2012 22:05 ] |
| Post subject: | 99 X1 front brake lever travell |
just done complete overhaul of a front caliper ,lever travels about 25 MM then to get solid feel to it ,1/2 inch m/s ,my bleed proceduer ,pistons fully in ,kept in by strong foam ,brake line purged from the nipple to m/s of air ,nipple locked off ,pads int caliper now pumped out to disc ,lever tie wraped to handel bars closeing circit and pressure gently bleed out from nipple then locked off ,pistons now pushed fully in starting with the small lower pair first then center pair & finnaly the upper large pair thus purgeing, HOPEFULLY any sticking bubbles up through the transfer galleries and out the bleed nipple lock off , release lever ,pump out pistons and repeet ,still have about 25 mm of travel to a solid feel , HMMMMMMMMMMMM ,is this kind of travel the norm |
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| Author: | pash [ 27 Mar 2012 22:24 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
If you are questioning it, I would say no, it is not normal, it should be as firm as your XB lever. I reckon there is still air in there... |
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| Author: | Maz [ 27 Mar 2012 22:25 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
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| Author: | pash [ 27 Mar 2012 22:28 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
Cable tie the lever tight to the handle bar and leave it overnight, then in the morning cut the cable tie and pump the lever. I thought it was an old wives tail, but I have had success with it. I reckon the air bubbles get smaller with the pressure and find their way to the top easier... |
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| Author: | WILLYBUELL [ 27 Mar 2012 23:14 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
pash wrote: Cable tie the lever tight to the handle bar and leave it overnight, then in the morning cut the cable tie and pump the lever. I thought it was an old wives tail, but I have had success with it. I reckon the air bubbles get smaller with the pressure and find their way to the top easier... cheers doc ,recon smaller bubbles have less chance of sticking int system dude ,wonderd if the pistons were slightly larger int early caliphers and with 1/2 bore M/S displacment ratios would be differnt giveing a slightly longer travel ,tie wrap it is DUUUUDE  
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| Author: | pash [ 27 Mar 2012 23:17 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
Was the system fully empty when you filled it? If you are using DOT 5 you can get water collecting at the bottom which may never come out cos it doesn't mix with the fluid If you are 3, 4 or 5.1 you should be ok for the water... |
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| Author: | Maz [ 27 Mar 2012 23:24 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
Dont start me off on the DOT 5 thing again  ......as the caliper has been overhauled Pash, I'm guessing all the old fluid has been disposed of 
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| Author: | WILLYBUELL [ 27 Mar 2012 23:25 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
just done complete overhaul of a front caliper yep pistons out cleaned lubed and refitted ,hence haveing purged the line and m/s of air ,then the pistons ,starting at the smaller lower ones working up
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| Author: | pash [ 27 Mar 2012 23:27 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
I am interested to know what overhauling took place... |
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| Author: | WILLYBUELL [ 27 Mar 2012 23:27 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
aaa yes ,NO rust on the pistons & complete refill with new fluid ,
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| Author: | pash [ 27 Mar 2012 23:28 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
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| Author: | WILLYBUELL [ 27 Mar 2012 23:31 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
Maz wrote: Dont start me off on the DOT 5 thing again ......as the caliper has been overhauled Pash, I'm guessing all the old fluid has been disposed of dont think about DOT 5 tonight ,you need your rest ,reeesr reeeeeest
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| Author: | WILLYBUELL [ 28 Mar 2012 19:39 ] |
| Post subject: | Re: 99 X1 front brake lever travell |
tie wrap trik BOB ON DOC ,tie wrap off coupleo pumps, ard, ROCK ARD SOOOOOOORTED yeeeeeeeeee haaaaaaaa aaaaaa
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