Adjusting Dura Ace 7400 headset
02-17-12, 07:08 PM
#1
car dodger
Thread Starter
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
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"
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"
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.
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.
02-17-12, 07:46 PM
#3
car dodger
Thread Starter
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"
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"
02-17-12, 08:30 PM
#5
car dodger
Thread Starter
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"
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"
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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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
02-18-12, 09:28 AM
#8
car dodger
Thread Starter
^ 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"
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"
05-03-20, 06:36 PM
#10
car dodger
Thread Starter
for reference, this is the bike from the original inquiry!
__________________
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"
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"
05-04-20, 11:28 AM
#11
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Beauty! Good bikes last a long time. The reason I focused on solving the same problem on an old Cannondale Criterium SR2000, is because I had an interested buyer. I just sold it off! Enjoy the Merckx in good health!
