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DuraAce Bottom Bracket Racket(12 posts)

DuraAce Bottom Bracket Racketclmbikski
Mar 20, 2002 2:31 PM
I have a D-Ace bottom bracket (BB-7700) and hollowset
cranks (FC-7701) on a Litespeed Ti frame and something
in this setup is producing an annoying creaking/clicking.
I recently removed the bb, cleaned everything up (after finding
all the bearings - they're not sealed!), repacked the bearings
and re-installed it with liberal amounts of anti-seize, and shazam!
The annoying noises got WORSE!

Someone has suggested that the source of the noise maybe too
much pre-load on the ball bearings. I'll try and back the adjustable
cup out a little to reduce the pre-load and see if that has any
effect, but if anybody has any other suggestions or similar experience,
I'd like to hear it.

Thanks,
Bryan
Teflon tape,TJeanloz
Mar 21, 2002 5:17 AM
This noise happens on almost all ti frames. The solution, as discovered by the 7-Eleven team many moons ago, is to wrap a layer of plumbers teflon tape around the BB threads before you thread it in.
Ultegra BBpmf1
Mar 21, 2002 7:27 AM
I fiddled with the DA BB on my LS Ultimate extensively and never could get it to quit making that clicking sound. Drove me crazy. It must be unique to ti bikes because I have the same BB in a carbon bike and there are no problems. I eventually just gave up and installed an Ultegra BB. I tried the teflon tape, lots of grease, ti prep, etc.

Try the tape, maybe it'll work for you. Cheaper than buying a new BB. Its the weakest desinged component in the DA group.
Ti Bikesgrzy
Mar 22, 2002 9:03 AM
I run a DA BB in my ti frame and an Ultegra triple on the wife's ti ride. I've also set up my bud's Seven with a DA. None of these bikes makes a peep, but it wasn't always that way. As pointed out by others you need to use teflon tape AND you must torque it to spec. If it still makes noise then you need to widen your investigation. Recent discoveries of noises that sound like the BB can be the seat post, stem (if quill type), crank bolts, wheels and quick release levers. Problem is a lot of thes noises are directly related to pedaling forces and they travel through the ti frame very quickly. It's both maddening and surprising to find a source other than the BB. The DA BB is not for everyone and many decide that the weight savings aren't worth the hassle.
That was my judgementpmf1
Mar 22, 2002 10:41 AM
The DA BB was just more trouble than it was worth. Unlike you, I don't enjoy working on bikes. If I had the money to pay someone to do it for me, I'd do it. I mostly do it because it often takes more time to haul your bike to a shop and pay someone than it does just to do something yourself.
Ti Bikesclmbikski
Mar 22, 2002 11:50 AM
Please excuse the ignorance, but how do you get the correct torque on the BB cups? Most of the torque wrenches I have seen are for socket drives and Park tool I have for the D-Ace BB cups is a wrench, not a socket.

Thx,
Bryan
Ti Bikesgrzy
Mar 22, 2002 12:13 PM
Well you're sort of right. The DA RHS fixed cup can use either and internal or external tool. The fixed cup is installed with the typical park splined tool which, in addition to having flats on the outside for a wrench, also has the square hole for a 3/8" socket. In any event a torque wrench can be configured to work on either one of these (you need the right sized socket for the former).

For the LHS you use both the splined BB tool and the external wrench for the lock ring. This is the part where you really can't use the torque wrench unless you come up with a "crow's foot" tool and do the offset calculation for the torque wrench on the lock ring. You need to set the cup (not too tight/not too loose) then tighten the lock ring while holding the cup fixed - do not use the torque wrench for this - you'll put too much pre-load on the bearings. At this point you have to use your judgement as to how tight to make the cup and the lock ring. I set my DA BB last year and haven't had to fiddle with it since. With an Ultegra/105 BB you simply use the torque wrench on both sides.

It's important to note that even if you set the BB to the correct torque it will often still click in a ti bike if teflon tape is not used. If you do all this and you still have clicking then you need to expand your investigation to other sources.
Ti Bikesclmbikski
Mar 22, 2002 12:34 PM
Please excuse the ignorance, but how do you get the correct torque on the BB cups? Most of the torque wrenches I have seen are for socket drives and Park tool I have for the D-Ace BB cups is a wrench, not a socket.

Thx,
Bryan
I have both the 8 and 9 speed Dura Ace BB andPaul
Mar 21, 2002 9:20 AM
have experinced clicking when standing. They were both loose by 1/3 turn. Just tighten up the bb's on both, and no clicking.
Now, on the 9 speed you just tighten up the cups till they turn with no binding. I tighten till it binds, then back off a little.
Make sure there is no build up on the bike BB shell, then tighten the sucker real good. I use the 3 prong tool for the 9 speed ring. This should be all you have to do unless the hollow BB has a small crack somewhere. Like PMF1 mentions, a lot of people just install the Ultegra. I've had real good luck with my BB (about 4 years old on the 9 speed). I weight 160 lbs.
I had a similar situation...PsyDad
Mar 21, 2002 10:35 AM
...with my Ultegra BB. Turns out that the problem was the bearings in my rear wheel. FWIW, the instructions for the installation of the Ultegra BB state not to use any grease or anything. I do not know if there are similar instructions for Dura Ace. Also, I have never had a ticking sound come from the BB with titanium frames (Merlin Extralight and Seven Axiom) and I have replaced the BB a number of times in the Merlin, as I owned it for 9 years, and once in the Seven. I do use a small amount of Phil Wood's grease when I install and a torque wrench.
Try a DA thenpmf1
Mar 21, 2002 11:28 AM
and hear what you've been missing.
re: DuraAce Bottom Bracket Racketyfoiler
Mar 21, 2002 9:05 PM
I posted a long reply to your problem but my "surf secret" software cleared my post! Cool huh?

Anyway, my problem with an identical setup is not the BB but my Ti crank bolts. Re-torque them everyday for a week and I'll bet the click click click goese away.

Hope this helps

yfoiler