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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Brakes!!!! /cgi-bin/YaBB.pl?num=1237175470 Message started by Chopped on 03/15/09 at 20:51:10 |
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Title: Brakes!!!! Post by Chopped on 03/15/09 at 20:51:10 So... switch to steel brake lines.... put new fluid in... pumped 1000 times... tried bleeding... nothing... kep pumping and still nothing... I may just be retarded... any sugestions? |
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Title: Re: Brakes!!!! Post by verslagen1 on 03/15/09 at 22:35:05 If you drain all the fluid out it's hard to get it started again. You might want to crack open the banjo's and get fluid up to that point and tighten it back up. I think I just removed the bleeder and used my finger to shut it off while releasing the lever. |
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Title: Re: Brakes!!!! Post by justin_o_guy2 on 03/15/09 at 22:51:25 If you can figure a way to get some pressure on top of the fluid in the master cylinder to get it going into the piston area then you'll start picking up. I would want the calliper loaded with fluid, & the hose full. If you can do that & open the pads up, that will drive fluid UP the hose & into the M/C piston area.Then it will be primed & will [pump fluid again. OR, like I first said, pressure on top. Be careful & dont spray brake fluid on the paint, or in yer eye, |
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Title: Re: Brakes!!!! Post by Rockin_John on 03/15/09 at 22:52:36 I've had a struggle getting fluid without any air bubbles in my long brake lines a few times too. There are several things you can try besides the standard old squeeze lever- close fitting- release lever - open fitting - squeeze lever method. I'm about ready to give up and buy one of those little grease gun pistol looking tools that are made especially for the job. Save a lot of frustration if you do this job often. Otherwise: One old poor-boy tricks is; a piece of plastic or rubber tubing just big enough to fit over the brake bleeder valve; and run it down into a bottle with a bit of clean brake fluid in the bottom. That way you can watch the air bubbles as they get pushed through the tubing, and the fluid level in the bottle keeps you from sucking any air back into the system. Oh... and you can pinch the tubing alternatively while pumping the lever to keep the fluid moving downward only. That way you don't have to open and close the fitting a couple of hundred times... ;) |
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Title: Re: Brakes!!!! Post by justin_o_guy2 on 03/15/09 at 23:10:47 If the mastercylinder has a bubble in the piston & the fluid wont fall into the chamber to be displaced & go down the tube, then all the pumping & fitting twisting in the world wont make it work, gotta get the fluid to drop into that chamber. |
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Title: Re: Brakes!!!! Post by SV og LS on 03/16/09 at 03:53:47 Connect the bleeder hose, leave the bleeder open and let it be. In a few minutes it'll bleed itself and fluid starts tickling down the bleeder hose. Then the usual close - squeeze - open - close routine. Finally I move the pistons in and out a few times to pump any aerated fluid upwards towards the master cylinder. Seems to give slightly better lever feel. |
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Title: Re: Brakes!!!! Post by Demin on 03/16/09 at 04:07:49 Put the tubing on the bleeder,pump up as normal,apply vacuum(suck ;D),crack open bleeder.Repeat. Seriously this works. |
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Title: Re: Brakes!!!! Post by smokin_blue on 03/16/09 at 04:22:13 two approaches. put the new line on the master first and fill down to the other end before attaching to the caliper. Messy but it helps. Or more preferred approach is to assemble as you have and then take a good hard look at there the highest point it. If you have pull back bars it is most likely bolt right on the master cyclinder. At that point what I do is fill up the master, put the lid on tight and then unbolt it from the handle bar. Tip the master around until the bolt is not the high spot but the rest of the master is and then pump with short little strokes. what you are trying to do is work the bubble up out of the line and through the tiny return hole in the bottom of the master reservoir. If you absolutely can't get anywhere then I would bolt it back up and wrap a rag around the top bolt (cover the tank and front fender with plastic) and while squeezing the brake lever crack the top line bolt loose and listen for a hiss. Tightlen it before you let off the brake lever. repeat if neccessary. This is one way to get air out of that bolt. Messy though. |
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Title: Re: Brakes!!!! Post by Mortation on 03/16/09 at 06:18:58 When replacing brake lines you have completely drained the system. To get the fluid back down the lines the easiest thing to do is go to your auto store and buy a cheap "one man" bleeding kit. Its like $5 or you can get a nice pump for $20 - $30. You need this bleeding kit or pump to suck the fluid down the lines. Make sure you don't run out of fluid while doing this or you will be starting over :) |
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Title: Re: Brakes!!!! Post by Chopped on 03/16/09 at 08:10:05 awesome... thanks for all the tips guys... I am taken a break for most of the day but will re attack later this afternoon! Will show pics of my latest creation.. the Ultimate Rat Monster! |
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Title: Re: Brakes!!!! Post by justin_o_guy2 on 03/16/09 at 10:14:47 I wonder,,, could a guy get a jar & stick 2 hoses thru the lid( have to seal that off.... one goes to the vac on the carb, the other goes to the bleeder on the front brake, fire that dude up, let the vac suck the fluid down, all YOU gotta do is keep the brake fluid reservoir full..? You spose that'd work? Yea, have to put it on prime,,,but so whut? |
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Title: Re: Brakes!!!! Post by Mortation on 03/16/09 at 10:24:02 6F7076716C6B5A6A5A62707C37050 wrote:
Theoretically that would work I guess. I wouldn't try it. $5 at auto zone is better than brake fluid in the carb :) |
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Title: Re: Brakes!!!! Post by Chopped on 03/16/09 at 10:24:23 might be worth trying! |
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Title: Re: Brakes!!!! Post by justin_o_guy2 on 03/16/09 at 10:31:10 Mort, thats the purpose of the jar, fluid would have to fill the jar before it could get in the hose to the carb. You mean $5.00 gets me a vac pump? |
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Title: Re: Brakes!!!! Post by T Mack 1 on 03/16/09 at 11:16:31 Just saw an product review on Speed Channel yesterday where they pump it from the bleeder back up to the reservoir. Sounded like a good idea to pump the air up hill. I would wonder how the pumping would affect the check valve....... hmmmm ... do we even have a check valve in the master cylinder...... |
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Title: Re: Brakes!!!! Post by Chopped on 03/16/09 at 11:29:51 GOOD QUESTION.... I would say if we didn't you could pick up a larger seringe and some tubing.... wallahhh! THERE IS YOUR PUMP! |
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Title: Re: Brakes!!!! Post by verslagen1 on 03/16/09 at 11:32:51 I don't think there's ever a check valve. You are always able to spread the pads and the fluid returns. Ok, so here's a low buck idea, walley world sells a plastic syringe ($3 something) with a length of tubing. Either use the syringe to pull a vacuum and pull fluid down from the top or fill it with fluid and push it up from the top. |
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Title: Re: Brakes!!!! Post by Chopped on 03/16/09 at 11:35:19 in the medical section right? heading there now! |
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Title: Re: Brakes!!!! Post by verslagen1 on 03/16/09 at 11:40:40 6D5A43437B5A5D5F46412F0 wrote:
Naw, RV section, it's for mixing 2 stroke oil and such. Although, the down the nose feeding tube would be longer. :P |
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Title: Re: Brakes!!!! Post by Chopped on 03/16/09 at 11:41:29 SWEET.... thanks brother! |
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Title: Re: Brakes!!!! Post by Roadie on 03/16/09 at 23:23:20 I'm a fan of the mighty vac. Sorry..... The stupid tube and bottle draining method just didn't work at all. And no amount of pumping either... I really had to suck the bugger out when I did the fronts and only the mighty vac could do that. - Roadie |
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Title: Re: Brakes!!!! Post by Chopped on 03/17/09 at 08:46:49 So... got fluid to the pads... but its still not working! think I will take the brakes off the back whell press the cylinder in and try to go from there! Hopeully that will work... Bled the lines by the way and no air that I can get out! |
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Title: Re: Brakes!!!! Post by justin_o_guy2 on 03/17/09 at 13:37:04 Front & rear are seperate. No connection. Gotta get that front right. Tell us whats happnin..How you got fluid down to the calliper, what happens when you squeeze the brake lever.Details,details,details.. |
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Title: Re: Brakes!!!! Post by Chopped on 03/17/09 at 15:19:45 Ok... Im runnin a brakeless frontend! I bled the calliper in the rear and no air is coming out... but no pressure on the brakes... its going through 3/16 steel line from the brake pedal to the rear caliper about 3.5" but that shouldn't matter as long as it has pressure in the line... which is the case cause when I bleed it comes out.... just frustrated is all! Hows that for details? |
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Title: Re: Brakes!!!! Post by SV og LS on 03/17/09 at 15:48:26 Rear brake's a bit harder to bleed. I would remove the whole thing and leave it hanging on the wall overnight (master cylinder highest). Pump the piston out and push in, tap the caliper and the line so any bubbles would rise to master cylinder. There has to be some air trapped somewhere if there's fluid but still no proper pressure. |
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Title: Re: Brakes!!!! Post by Chopped on 03/17/09 at 17:08:05 good idea... I will see if I can make that happne... might be kinda hard to get the line back out... but worth a try! |
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