Front Brake lock up
Road Master
Joined: Jun 2011
Posts: 974
Likes: 13
From: Chesapeake Virginia
Be sure the vent holes in the MC lid are open and venting properly. According to the service manual you should get a surge of fluid in the MC when you first pull the lever in and that shows everything in the MC is correct. Surge will break the surface of the fluid in the reservoir. If you do it hard it will squirt fluid out so be ready.
Was there moisture in both calipers. How did the puck bores look. I can't find anything in my service manual that says to grease the pins. Never liked putting grease on any brake parts that are not sealed in a rubber boot because of dirt build up and possible contamination of the pads.
Was there moisture in both calipers. How did the puck bores look. I can't find anything in my service manual that says to grease the pins. Never liked putting grease on any brake parts that are not sealed in a rubber boot because of dirt build up and possible contamination of the pads.
Thread Starter
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Road Master
Joined: Jan 2006
Posts: 918
Likes: 1
From: Bulldog Country
I think I may have found the problem. After a close check of the bore where the piston goes, found some pitting and corrosion. Guess I'll fork out a couple of hunderd bucks on a new one.
Thanks to all
Thanks to all
Stellar HDF Member
Joined: Jan 2008
Posts: 3,036
Likes: 65
From: Earth
Elite HDF Member
Joined: Sep 2007
Posts: 4,928
Likes: 69
From: Near Myrtle Beach, SC
But I can understand the point you make. Thanks
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Road Master
Joined: Jun 2011
Posts: 974
Likes: 13
From: Chesapeake Virginia
It's actually specialized brake caliper lube, not grease. And it does make a difference with the pads ability to retract by significantly reducing the amount of friction as they ride along the pin. You are correct that it is not specified in the service manual. I didn't think that was the OPs main problem though, it was just a suggestion for reduced friction and better pad retraction once he does get his main problem resolved.
But I can understand the point you make. Thanks
But I can understand the point you make. Thanks
Bigredone I have had pretty good results in the past cleaning up the MC bore with a 2 arm cylinder hone. Might want to give it a try before spending the big bucks on a new one. Since you have purchased the rebuild kit already. I have 25+ years on my Shovelheads lightly honed aluminum MC. As other posters said here be sure and check the brake light switch to be sure it is not stopping the lever travel and not allowing the piston to go all the way out. The surging comes with the first 1/8" or so of piston travel.
Good Luck