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  1. #1
    car dodger norskagent's Avatar
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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?
    1989 Schwinn Paramount OS
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    "I've consulted my sources and I'm pretty sure your derailleur does not exist"

  2. #2
    Senior Member miamijim's Avatar
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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.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  3. #3
    car dodger norskagent's Avatar
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    Yes I made sure both ball rings were open side down, but I wasn't sure about the o-rings.
    1989 Schwinn Paramount OS
    1980 Mclean/Silk Hope Sport Touring
    1983 Bianchi pista
    1976 Fuji Feather track
    1979 raleigh track
    "I've consulted my sources and I'm pretty sure your derailleur does not exist"

  4. #4
    Senior Member RobbieTunes's Avatar
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    How'd it go?

    Robbie ♪♫♪...☻

    I'm not a doctor, but I watch them on TV.

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  5. #5
    car dodger norskagent's Avatar
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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!
    1989 Schwinn Paramount OS
    1980 Mclean/Silk Hope Sport Touring
    1983 Bianchi pista
    1976 Fuji Feather track
    1979 raleigh track
    "I've consulted my sources and I'm pretty sure your derailleur does not exist"

  6. #6
    Bianchi Goddess Bianchigirll's Avatar
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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.
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo SOLd, '86 Volpe, '89 Axis SOLD, '79 Mixte SOLD, '99 Mega Pro XL Ti SOLD, '97 Ti Megatube, , '90 something Vento 603,

    Others but still loved,; '80 RIGI, '80 Batavus Professional, '87 Cornelo, '86 Bertoni (sold), '09 Motobecane SS, '98 Hetchins M.O., '09 K2 Mainframe SOLD, '89 Trek 2000, '?? Jane Doe (still on the drawing board), '90ish Haro Escape

  7. #7
    Senior Member miamijim's Avatar
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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
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  8. #8
    car dodger norskagent's Avatar
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    ^ That was it! Thanks!
    1989 Schwinn Paramount OS
    1980 Mclean/Silk Hope Sport Touring
    1983 Bianchi pista
    1976 Fuji Feather track
    1979 raleigh track
    "I've consulted my sources and I'm pretty sure your derailleur does not exist"

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