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2 Questions regarding Dura Ace 7700 crank arms.(4 posts)

2 Questions regarding Dura Ace 7700 crank arms.James
Apr 15, 2002 7:11 PM
1. Does anyone know the torque for the crank arms in foot or inch pounds. 2. On the non-drive side, there is a creek when I apply pressure(alot), coming from where the crank arm meets the BB. Everything is newand greased. Someone told me that I need to seat the crank arm correctly??? Any advice would be great. Thanks...........James
re: 2 Questions regarding Dura Ace 7700 crank arms.TJeanloz
Apr 16, 2002 4:12 AM
You have correctly guessed that you probably have a torque issue, either with the bottom bracket or the crankarm bolt. I can only get you half way there, in that I only know the spec in Newton meters; 70 Nm for the bottom bracket, 50 Nm for the crankarm bolt. In laymans terms, as tight as you can get them with a long wrench.
re: 2 Questions regarding Dura Ace 7700 crank arms.JimP
Apr 16, 2002 8:56 AM
The crankarm torque is 50 nm (37 ft.lbs, 435 in.lbs), the crankarm cap is 7 nm (5 ft.lbs, 60 in.lbs), and the BB is 70 nm (51 ft.lbs, 608 in.lbs).
re: 2 Questions regarding Dura Ace 7700 crank arms.curlybike
Apr 16, 2002 11:33 AM
Before you torque up the crank arms, remove the BB and wrap the cup threads with teflon tape. This will tighten the fit up and keep the cups from squeeking in the frame. Reduce the cup torque to avoid stripping the frame threads or the cup threads. The teflon tape makes the threads slippery and reduced torque gets everything tite enuff. I stripped an Al. frame bb thread this way and I knew better. Duh.