Back by popular demand, the general all-things Road forum!
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ProTech
- Posts: 286
- Joined: Sat Nov 26, 2005 1:53 pm
- Location: Montreal
by ProTech on Sat Apr 29, 2006 3:01 am
durarace wrote:Wogamax,
As far as torque goes, I did a search on weightweenies and read in several threads that with ISIS BB you tighten until it bottoms out. That is what I did.
Not so...
Usual torque values of the crankarm bolts on ISIS interface are ~ 57.00 n/m for steel bolts and 59 n/m for Alu.
Basic torque wrench: 50.00$ , 8mm Allen driver: $5.00 ,it a small price to pay when instralling $400 cranks.
A torque wrench comes in handy on all fasteners especially Ti and Aluminum as long as the part is installed using anti-seize compound or medium strenght locktite (blue), the torque values are then accurate.
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MGS9500
- Posts: 194
- Joined: Sat Oct 23, 2004 2:53 pm
- Location: Cincinnati, Ohio
by MGS9500 on Tue May 02, 2006 1:36 am
As noted, FSA sells a self extracting bolt, but now does not recommend it's use. I put one on an FSA compact crank and pulled the extractor out withoug removing the crank. I ended up stripping the treads on the crank just like you did.
The good news is I took it to my LBS where I bought the cranks. He was able to extract the crank but using a standard crank extractor which he was able to get into the treads of the stripped threads. He really bottomed it out before extracting the cranks. Then, he gave me a brand new set of FSA cranks. However, not with the self extracting bolts.
For the Pulsion cranks, I use the FSA BB which comes with the aluminum and steel bolts. I have discarded the Pulsion bolts and will never use self extracting bolts.
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flying
- Posts: 2864
- Joined: Mon Dec 19, 2005 9:16 am
by flying on Tue May 02, 2006 1:42 am
Yeah I just use one of these to pull cranks
It is the Park CCP-4 cheap & easy
Also I use a steel bolt to put them on. I am afraid of the stress it takes to seat the arms on a ISIS BB all the way. Then remove the bolt & use the lighter alum one.
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FreaK
- Posts: 852
- Joined: Sat Aug 27, 2005 5:57 am
- Location: mOntreal
by FreaK on Tue May 02, 2006 3:38 am
all these stories about aluminum self extractors sucking has me a bit surprised, the self extracting portion on my Race Face Diabolus is alu, and it works perfectly, but then the arm comes off pretty easy too. Perhaps the key is deeply engaging threads, it's a machined part on my cranks.
it's actually possible to come to the conclusion even before realising it makes no sense at all
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tymon_tm
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durarace
- Posts: 140
- Joined: Thu Apr 29, 2004 7:26 pm
by durarace on Tue May 02, 2006 5:22 am
Flying ---- the Park puller you pictured won't fit the Pulsion cranks. The Pulsion cranks have a way bigger area that the puller threads onto. What puller do Pulsion cranks use besides self extractors?
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yourdaguy
- Posts: 2204
- Joined: Thu Mar 17, 2005 3:25 am
- Location: Southern Indiana USA
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by yourdaguy on Tue May 02, 2006 5:36 am
I have been a tandem owner and a memeber of the tandem listserve for years. Many new tandems come with the self extracting FSA bolts and there are no reports of problems. Our tandem came with FSA cranks and FSA self extracting bolts on both cranks. We have never had a problem. Is it possible that there is a compatability problem between the self extracting bolts and your specific cranks? I have installed FSA self extractig bolts on many 9 speed systems with no problems so far. All of them have been Octalink, by the way. It never hurts to grease the splines. When I build a bike every fastner either gets grease or Locktite as well as surfaces such as splines.
For certain parts stiffer is more important than lighter.
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Erez_Pinarello
- Posts: 1206
- Joined: Sat Jan 15, 2005 10:39 pm
- Location: Israel
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by Erez_Pinarello on Tue May 02, 2006 6:30 am
here is how to pull the crank off
use a traingular shapped metal item that you put between the crank arm and the BB/frame
now just tap on it with a hammer.
the expanding part that will go downards will push you crank arm off.
if you are riding a carbon frame its recomended to put something between the traingular item and the frame so it wont scratch
I made a drawing for you
enjoy
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Attachments
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flying
- Posts: 2864
- Joined: Mon Dec 19, 2005 9:16 am
by flying on Tue May 02, 2006 6:53 am
durarace wrote:Flying ---- the Park puller you pictured won't fit the Pulsion cranks. The Pulsion cranks have a way bigger area that the puller threads onto. What puller do Pulsion cranks use besides self extractors?
I did not know that. I use FSA Carbon Pros.
Maybe Juanmoretime will chime in or others that use the Pulsions.
Sorry
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TimT
- Posts: 78
- Joined: Sat Apr 16, 2005 1:44 am
- Location: New Orleans Louisiana USA
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by TimT on Tue May 02, 2006 11:35 am
There are 2 differant Park crank pullers. Just make sure you get the right size.
Tim
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MGS9500
- Posts: 194
- Joined: Sat Oct 23, 2004 2:53 pm
- Location: Cincinnati, Ohio
by MGS9500 on Tue May 02, 2006 11:43 am
I use the small Pedro crank extractor. Easy to carry on a trip. Works with the Pulsion cranks.
I mount the cranks with the steel bolt and then switch to the aluminum.
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