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Old 02-17-12, 07:08 PM   #1
norskagent
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adjusting dura ace 7400 headset

I think I set the crown race and lower and upper cups correctly, they all look square to my eye. The headset has the ball retainers plus an upper and lower "o-ring". And 2 spacers (one is inset w/ the upper adjustable cup) and a locknut of course. I have both ball retainers oriented correctly. When I attempt to adjust the headset, it binds up as I tighten it, but also is too loose when I check fore/aft / side to side play. I'm pretty sure the frame is milled square. What is up, is it an O-ring thing? Should I give up and let the LBS check it out?
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Old 02-17-12, 07:42 PM   #2
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You either have one of the bearings flipped or the o-ring seals are installed wrong.

Install the two seals first, one the fork crown and the other on the upper frame cup (actually a race), they can be tricky, use a dab of grease to hold them in place. Place the lower bearing onto the fork with the 'open' side down. The upper bearing is placed 'open' side down as well.
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Old 02-17-12, 07:46 PM   #3
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Yes I made sure both ball rings were open side down, but I wasn't sure about the o-rings.
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Old 02-17-12, 08:19 PM   #4
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How'd it go?
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Old 02-17-12, 08:30 PM   #5
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How'd what go? I'm probably going to get the LBS to set the headset right, and hopefully I can do the rest of the build. Then I will post up how it went!
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Old 02-17-12, 08:53 PM   #6
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When you say "O" ring your talking about the dust seals for the upper and lower race/cone yes? It has been awhile since I fooled with one but I think they sort of snap onto the races before you put the bearings in.
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Old 02-18-12, 06:18 AM   #7
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Quote:
Originally Posted by Bianchigirll View Post
When you say "O" ring your talking about the dust seals for the upper and lower race/cone yes? It has been awhile since I fooled with one but I think they sort of snap onto the races before you put the bearings in.
+1. the seals are channeled, the channel side faces down
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Old 02-18-12, 09:28 AM   #8
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^ That was it! Thanks!
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