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General Category >> Rubber Side Down! >> rebuilding brakes- question about union bolt
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Message started by sbaugz on 02/27/11 at 15:01:49

Title: rebuilding brakes- question about union bolt
Post by sbaugz on 02/27/11 at 15:01:49

So I took my brakes completely apart and cleaned them. Replaced the pads and am now getting ready to put it all back together. My question is regarding the union bolts - there are two of them. One attaches the brake line to the master cylinder and the other attaches it to the caliper. My question is regarding how they line up with the brake line. The union bolt is hollow and has two exit holes along the threads. The brake line fittings also have corresponding holes too. How do you make sure these line up when you tighten them down?

Title: Re: rebuilding brakes- question about union bolt
Post by MotoBuddha on 02/27/11 at 15:45:02

If you look at the inside of the banjos on the ends of the brake line, you'll see they're concave. That means you don't need to worry about lining anything up. Fluid will come out the holes in the master cylinder bolt, flow around the inside of the banjo to the brake line, down to the banjo on the caliper end where it flows into the banjo, into the holes in the bolt, then into the caliper. So just tighten the bolts (assuming the copper washers are in good shape) and then bleed the system.

Title: Re: rebuilding brakes- question about union bolt
Post by sbaugz on 02/27/11 at 16:39:43

ahh, thanks. Makes sense.