TA cyclotourist chainring nut wrench?
I'm trying to take apart a TA cyclotourist crank and neither of my chainring nut wrenches work. I don't have a screwdriver that works on these either. I imagine there was once a special nutwrench for the chainring bolts. Will the Park CNW 2 chainring nut wrench work? Is there another solution out there?
https://www.parktool.com/product/cha...t-wrench-cnw-2 https://cimg3.ibsrv.net/gimg/bikefor...2029c6e1a1.jpg |
I think the last time I took mine apart, I used a suitably large screwdriver to hold the lock bolt.
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Yeah, it has to be a thick screwdriver with a long handle, good square edges and fully as wide as the slot. Bear down hard on it while you're torquing the hex head on the other side -- clamping the crank/chainring in a vice helps steady it. And it'll still probably jump out on you.
...And, it'll work only for the three that aren't half-hidden under the crank. :notamused: |
I just bought that Park tool yesterday. It doesn't work very well on my Sugino AT crank. These screws are really stuck. I managed to get two off, but the other three are really stubborn. I just want to change a 50t ring to a 52. Should have been a 10 minute job, I'm into day 2. After two penetrating oil soakings and the new tool, still no go. The tool keeps slipping which screws up the little slots in the back. I've always been able to fake it with a large flat screw driver. Since these were so tight, I thought I'd try the right tool. No joy yet. Good luck with yours.
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If and when you get it apart, velo orange sells much better screws for those. I use the velos on a t.a. and an ancient shimano deore 50.4.
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Originally Posted by 52telecaster
(Post 21002532)
If and when you get it apart, velo orange sells much better screws for those. I use the velos on a t.a. and an ancient shimano deore 50.4.
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Originally Posted by conspiratemus1
(Post 21002426)
Yeah, it has to be a thick screwdriver with a long handle, good square edges and fully as wide as the slot. Bear down hard on it while you're torquing the hex head on the other side -- clamping the crank/chainring in a vice helps steady it. And it'll still probably jump out on you.
...And, it'll work only for the three that aren't half-hidden under the crank. :notamused: |
Originally Posted by bikemig
(Post 21002764)
Is there a tool designed to work on these chainring bolts? There must be an old tool designed for the TA cyclotourist.
I confess I've never seen this tool in the flesh. http://www.os2.dhs.org/~john/ta-toolkit.jpg |
Originally Posted by JohnDThompson
(Post 21002792)
Maybe the #24 "Special key for 5 pins chainwheel bolts?"
I confess I've never seen this tool in the flesh. http://www.os2.dhs.org/~john/ta-toolkit.jpg I've never fooled with a TA crankset before. It is a good looking crankset on a vintage bike and chainrings are still available. |
Originally Posted by bikemig
(Post 21002795)
I'd love to have that tool bag with all those old tools . . . .
I've never fooled with a TA crankset before. It is a good looking crankset on a vintage bike and chainrings are still available. |
Yes, love that old crank. (Congrats to the OP for getting the nuts off.) They were wonderful for 1970s-style loaded camping-touring. 48T outer, some convenient middle, 26T inner, what's not to like? Rings lasted a long time, still have them. Sadly, pedal broke out of the eye of the left crank during my last year commuting before I retired in '16, just as I stood up to climb an overpass. Ouch that pavement is hard. Fortunately no cars behind me and no injury. (The fractured bits show the usual old surface + new surface appearance so it was likely a fretting crack that propagated into the crank until pop---> splat!)
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The first shop I worked in had a complete TA case, and we built up TA cranks to suit all the time, yet I don't think we had one of those #24 tools. Maybe we did; it's been a long time.
Chainring bolts freezing shut was always an issue even BITD. I quickly learned to always use generous amounts of grease on them, but not everyone did. 40+ years later, of course there will be even more hassle. Anyway, I would search for a big screwdriver that fits the slot well, and then square up the end with a grinder or file. Soak well with your favorite penetrant beforehand, and proceed carefully. |
Originally Posted by JohnDThompson
(Post 21002792)
Maybe the #24 "Special key for 5 pins chainwheel bolts?"
https://live.staticflickr.com/2480/4...c0388d10_z.jpg https://live.staticflickr.com/2441/5...c7df310f_b.jpg |
I just finished getting the chain ring bolts off my Sugino AT with help from my old Workmate's wooden jaws. I clamped the Park tool hard against the messed up nut slots on the back side, and used a 90° angled hex driver on the front. I can usually get by with a large flat blade screw driver, but these were really stuck, so I bought the Park tool. This was a swap meet crankset that I bought 3 years ago, and never needed to remove the rings. I decided to try a 52t in place of the 50. What should have been a 10 minute job took three days, includng a couple of PB Blaster soaks. Turns out the screws were stuck with what looks like red Loctite. Now I need to find new chain ring bolts.
https://cimg3.ibsrv.net/gimg/bikefor...e5e12ff98e.jpg Park tool clamped hard against back side nut. https://cimg9.ibsrv.net/gimg/bikefor...6341d86965.jpg 90°hex driver just cleared crank arm. https://cimg1.ibsrv.net/gimg/bikefor...b976f40c46.jpg Red Loctite evidence? |
The current VAR chainring nut wrench is really good, it has two slightly different sides. Whenever the Park/Campy/whatever brands don't work that thing always grabs without slipping, one side of it will anyway.
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Originally Posted by wesmamyke
(Post 21006448)
The current VAR chainring nut wrench is really good, it has two slightly different sides. Whenever the Park/Campy/whatever brands don't work that thing always grabs without slipping, one side of it will anyway.
https://www.vartools.com/en/chainrin...d-var-p644.php I may need to order one. |
Originally Posted by bikemig
(Post 21006456)
Are you talking about this tool?
https://www.vartools.com/en/chainrin...d-var-p644.php I may need to order one. It's a bit longer than any of the standard ones, that might help as much as it fitting better. |
Originally Posted by bikemig
(Post 21006456)
Are you talking about this tool?
https://www.vartools.com/en/chainrin...d-var-p644.php I may need to order one. https://www.vartools.com/images/phot...1041_335_G.PNGhttps://www.vartools.com/en/combined-tool-for-chainring-bolts-var-p828.php |
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