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Old 08-25-11, 10:15 AM   #1
sisddwg
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Headset problem help

I just installed a Shimano 600 HP 6400 headset. This is the one with balls and retainer. Everything works fine as long as I don't install the lower race dust cap. If I try to use the dust cap the final adjustment will be too loose or too tight. Any suggestions will be greatly appreciated.
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Old 08-25-11, 11:35 AM   #2
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maybe the bearing cages are oriented incorrectly? are both sets of bearings the same size?
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Old 08-25-11, 11:47 AM   #3
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Excellent thought but the cages are oriented correctly. Both sets of bearings are the same size. Thank you.
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maybe the bearing cages are oriented incorrectly? are both sets of bearings the same size?
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Old 08-25-11, 12:14 PM   #4
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the dust cap will cost a little drag as any seal does .
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Old 08-25-11, 12:24 PM   #5
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the dust cap will cost a little drag as any seal does .
I agree with you but this is more than a little drag. If I adjust the headset to eliminate looseness the drag is really excessive. Perhaps using it this way for a period of time will eventually eliminate the drag. What do you think?
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Old 08-25-11, 04:57 PM   #6
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Those seal rings had to be installed oriented the proper way. There is a little lip on the outer edge and, while i don't remember which way it had to face, only one way was correct. Try turning the seal over and see if it helps.

BTW, I had that exact headset on a '92 Trek 1420 as a replacement for the OEM Tange which wore out and brinelled in 4000, miles. The HP-6400 lasted almost 20,000 miles.
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Old 08-27-11, 07:02 AM   #7
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Those seal rings had to be installed oriented the proper way. There is a little lip on the outer edge and, while i don't remember which way it had to face, only one way was correct. Try turning the seal over and see if it helps.

BTW, I had that exact headset on a '92 Trek 1420 as a replacement for the OEM Tange which wore out and brinelled in 4000, miles. The HP-6400 lasted almost 20,000 miles.
Well, that's about the only solution I can think of also. Thank you.
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