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Changing brake lines
#305609 12/26/2008 11:14 PM
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khatt Offline OP
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I'm going to be changing my brake lines real soon with the braided steal ones. Besides replacing the pads of course what other item(s) am I going to need to do this job?


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Re: Changing brake lines
khatt #305610 12/26/2008 11:31 PM
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Is it necessary to replace the pads? I mean, I can see doing it if you're going to be working on the brakes anyway, but is it a requirement?


-Joe Merlino Boston, MA USA 1982 BMW R100 (decomissioned), 2003 America Triumph: Cool enough for The Fonz, cool enough for me.
Re: Changing brake lines
Joe_Merlino #305611 12/26/2008 11:36 PM
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Pretty much just new crush washers and some break fluid should do the trick. Easy on the banjo bolts the twist off easily.


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Re: Changing brake lines
khatt #305612 12/27/2008 12:42 AM
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I find this to be helpful: HF Brake Bleeder , it's a good deal for the dough.

The trick is to place the catch bottle high so the bubbles rise from the caliper bleed screw when you squeeze the brake lever, & close the bleed screw at the end of the lever travel so you don't backflow the bubbles into the caliper...

Remember to top off the master cylinder periodically as you purge the lines so you don't run it dry!

A third arm helps also...

Re: Changing brake lines
B02S4 #305613 12/27/2008 12:59 AM
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Same thing can be accomplished by running a piece of clear tube from the bleeder into a CLEAN glass jar with clean break fluid in it. just open the bleeder with the tube connected to the bleeder and the other end under the fluid level in the jar and slowly pump it. no need to close the bleeder until you don't see any more bubbles. Just wait a second before letting off the lever so you don't suck any bubbles back in the tube. When there are no more bubbles you should be done and just close the bleeder and remove the tube. It can be difficult to get all the air out sometimes. If your lever still feels soft tie it to the grip over night and then try the lever again the next day to see if it firms up.


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Re: Changing brake lines
The_Dog33 #305614 12/27/2008 11:51 AM
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You can also install SpeedBleeders. They replace the bleeder valves in your brakes. They have a one-way valve that opens when you squeeze the lever and closes when you let it off. No danger of back-suck.


-Joe Merlino Boston, MA USA 1982 BMW R100 (decomissioned), 2003 America Triumph: Cool enough for The Fonz, cool enough for me.
Re: Changing brake lines
Joe_Merlino #305615 12/27/2008 1:11 PM
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Speed bleeders don't work on new lines. With empty lines full of air the air compresses before the valve on the bleeder opens. Staffo had this problem a while back. Once you have most of the air out of the lines they would be fine.


I learned all I need to know about life by killing smart people and eating their brains.
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Re: Changing brake lines
The_Dog33 #305616 12/27/2008 8:11 PM
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How are you supposed to get them in there with full brake lines?


-Joe Merlino Boston, MA USA 1982 BMW R100 (decomissioned), 2003 America Triumph: Cool enough for The Fonz, cool enough for me.
Re: Changing brake lines
The_Dog33 #305617 12/28/2008 12:23 AM
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khatt Offline OP
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Thanks for the input guys. I do have another question. How much brake fluid Am I going to need?


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Re: Changing brake lines
khatt #305618 12/28/2008 12:40 AM
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Depends on your bleeding method, one of the large containers would be more than enough.


I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
Re: Changing brake lines
Joe_Merlino #305619 12/28/2008 12:44 AM
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Quote:

How are you supposed to get them in there with full brake lines?




My point exactly, you need to use the regular bleeders first or crack a banjo loose to get fluid in the lines, could even put break fluid in a jar as I described for bleeding and put the end of the line right in the fluid and pump it full then put it on the banjo bolt. That method would be rather messy though. Then once there is enough fluid in the lines to force the SpeedBleeder open they would work fine. I never said all the air needed to be out but you need to get most of it out before they will work.Same problem would happen with too much air in the caliper but you probably won't have that issue since they are already full.


I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!

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