1980 xs1100 rear master cylinder rebuild

[yellowjacket]

I took the rear master off and cleaned it thoroughly. I can see through all the holes. I put the rebuild kit in and I can't get it to pump the brake fluid. I must have something out of order. I have searched for a picture of the order of parts on the shaft but can't find one. The service manual is not that clear. Does someone have a picture to share that would help. Thanks.

[2WheelFun]

You need to bench bleed it. Basically making a seal with your finger while pumping it to prime it. The seal can be made at any of the line joints but the closer to the master the better.

[yellowjacket]

OK. I still need to get the order of the parts.

[Ranger_xs1100]

sorry, don't have a picture, but will this help you at all?

Rear MC rebuild - sequence of parts - XS11.club Forums

[cajun31]

I took the rear master off and cleaned it thoroughly. I can see through all the holes. I put the rebuild kit in and I can't get it to pump the brake fluid. I must have something out of order. I have searched for a picture of the order of parts on the shaft but can't find one. The service manual is not that clear. Does someone have a picture to share that would help. Thanks.

Bleeding the brakes is a much easier job if you would invest in a mity vac or something similar. Much easier to just pull the fluid through versus trying to get the air out. Especially works well on the front brakes.

[LenB]

After filling the master cylinder reservoir and pumping the (bad word) out of the brake pedal to no avail, I realized that the necessary vacuum could not be created without priming EVERYTHING. Stripped the MC down AGAIN and used a kid's large liquid antibiotic syringe to inject brake fluid directly into the plunger cylinder and the caliper. Now, with brake fluid in the critical parts of the system, I finally felt some pressure at the pedal and successfully bled the air out of the system. And, yes, I too incorporated a simple hand-operated pumping system which greatly helped the bleeding process. If all parts are installed proprely, it's time to celebrate when you feel good pressure at the pedal!

[yellowjacket]

Thanks for the replies. I now have rear brakes. Put the master back together with the above listed order. Primed the caliper with brake fluid. Attached a long hose to the bleeder bolt and primed with my mouth on the other end while I pumped the master. Worked great. Slowly coming together.

[Radioguylogs]

... Attached a long hose to the bleeder bolt and primed with my mouth on the other end while I pumped the master. Worked great. ...

I do this too!