Technical & Reference Section > Tech and Restoration

Sugino GT Crank Problemo

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Jamroll:
Thx Radsters  :daumenhoch:
I'm gonna try a differnet axel tonight ..... and see how that goes, I assumed that as this was the one that came with the crank (NOS) that it was correct (Mother of all Fook Ups assumption  :D )
Failing that I'll give the red thread lock nut a go.........I really dont want to loctite it though... wot if i need to remove again..surely that would be a pain in the arse then????

soll36:

--- Quote from: jamroll on June 25, 2009, 09:01 AM ---Thx Radsters  :daumenhoch:
I'm gonna try a differnet axel tonight ..... and see how that goes, I assumed that as this was the one that came with the crank (NOS) that it was correct (Mother of all Fook Ups assumption  :D )
Failing that I'll give the red thread lock nut a go.........I really dont want to loctite it though... wot if i need to remove again..surely that would be a pain in the arse then????

--- End quote ---
you can get different types of thread locker mate..the red loc-tite stuff the guys are on about is summat like no.253 and is not a permanent lock like some you can get so it works enough to hold the bolt but can be removed when needed..   :daumenhoch:

MartyC:
Dare I say it, the alloy may have stretched and no longer biting on the axle fully when tightened up  :( .  Was quite common on Sugino's alloy cranks bitd.

moley:
When you do tighten it.  Is it fully tight with no play in the cranks?

If it is then it just needs something to stop the bolt coming loose.

We use Loctite 390 screw lock.   It can be hard to get bolts undone afterwards.  This is small bolts like m3-m5 but should be alright with bigger bolts.

Try loctite on the bolt and allow to dry.  DONT loctite and screw the bolt in in case it becomes stuck.

One the loctite has hardened then screw it in.  It should provide enough resistance to stop it from coming undone but still allow you to undo if need be.

Maybe some ptfe tape that plumbers use on threads.  It would work similar and provide enough resistance.

If the cranks have play when fully tightened then dont bother as you'll never get it right as its stretched!!  :(

jT Racing:
measure the thinnest and thickest part of the square taper. i'll compare it to one i have and see if it's a match. could have been a nos arms and any old BB set cobbled together.

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