[CR] Pitted Headset

(Example: Production Builders:Pogliaghi)

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From: "Mark Petry" <mark@petry.org>
To: <classicrendezvous@bikelist.org>
Date: Fri, 16 Oct 2009 16:03:28 -0700
Thread-Index: AcpOtN+Zf5w8ycH5S36298zNAESHqQ==
Subject: [CR] Pitted Headset


OK, here's the real secret. Don't repack it with Comet or Pepto Bismol. Don't add or remove balls.

When confronted with a headset that is brinelled, mark the lower cup and the crown race with a sharpie so you know the "straight ahead" position, then pop them out. Re-install the lower cup offset 90 degrees to the right, and the crown race 90 degrees to the left.

Now you've moved the two worn areas out of the way, and put fresh bearing surface in the wear position.

Now repack using some serious grease with an "EP" rating. I like Wurth CV joint grease. Molybdenum disulfide, black, very messy. And of course use loose balls in the lower race. Adjust carefully - not too tight! And it's good for another 20 years.

Mark Petry

Bainbridge Island, WA