Help with seized rear MC

[Buetra19]

Any tips for getting the metal column inside unstuck and out so I can rebuild. I've only managed to push it in further. 80 gs1000g. Thanks!!

[Guest]

Any tips for getting the metal column inside unstuck and out so I can rebuild. I've only managed to push it in further. 80 gs1000g. Thanks!!

Assuming you have already removed the circlip & associated plunger rod, you can try using compressed air - point your air gun into the port the banjo screws into...

Be carefull though, hold a rag over the opposite end to catch the piston when it fires out.

I use this method to remove all my stuck MC & caliper pistons - works quite well most of the time...

[Guest]

Usually if they are stuck they are junk.

[Guest]

grease gun

[Creekwalker]

Stuck caliper pistons

I recently experienced stuck brake pistons that would not come out with compressed air. I will post some pics of what I came up. with. A bolt about 1/2 inch long that will screw into the banjo bolt hole. I then drilled a small hole length wise through the bolt. I then drilled and tapped the top of the bolt. Be sure that you do not go to deep here. I didn't have the correct tap for the hole that I drilled that was the right one. I used the closest metric tap that I had and screwed the grease zerk into the hole in top of the bolt. Worked fine. Pistons came out easily with no drama. A lot of grease to clean up but all confined to one area. I prefer compressed air but using the grease gun made an impossible job possible.IMG_20140704_132614357 - Copy

[850 Combat]

Usually if they are stuck they are junk.

Unfortunately

[78550GS]

Just last week, my neighbor and his Goldwing dropped by with a stuck MC.

I used air to release it, and rebuilt it.

If you decide to use one after it is released, make sure the internals are not scored from the piston. I had to lightly smooth the edge for the snap ring once it was clean. A little deeper grove helped hold everything in anyway, so the neighbor was happy.