Suggested tool for Shimano DA 7700 BB
11-26-16, 10:34 AM
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Suggested tool for Shimano DA 7700 BB
I am installing a (NOS) Shimano Octalink V1 and 105 (nine speed drive train) to my Guerciotti SLX. The drive side cup has six external notches (so does the adjustable lock ring on the off side). I cannot find a Park tool in my collection or their website that works. The Shimano tools looks not much better than what I have been trying and is as rare as hen's teeth and expensive. Any thoughts? I would prefer a driver to engage all six notches rather than a wrench that grabs three or five (in the Shimano tool).
J
J
11-26-16, 11:00 AM
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The Shimano external wrench TLFC-31 is similar to the HCW-5 but heavier and has five engagements but I would prefer and driver, not a wrench. Guess I have to buy a TLFC-31, though I do not like it.
Last edited by Loose Chain; 11-26-16 at 11:06 AM.
11-26-16, 10:14 PM
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11-27-16, 01:03 AM
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Brad, yes, I have the directions. It is the tools I need. As I said, I prefer a (ratchet) driver type, not a wrench. But, I have ordered the Shimano TL-FC31 wrench specified. Which is hard to find and expensive. Looks like a knuckle buster to me. And disappointingly, Parks has no equivalent driver or wrench that I can determine.
J
J
Last edited by Loose Chain; 11-27-16 at 01:19 AM.
11-28-16, 02:04 PM
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I've never taken a close look at the 7700 BB to notice that the drive side does not take the usual cartridge BB tool. Any old lockring tool from the bygone era will do. This Park HCW-5 is ~$15 on eBay. I don't know if the 3-tooth end lines up, but I spent many years securing lockrings with a single-tooth tool.
11-28-16, 07:15 PM
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I've never taken a close look at the 7700 BB to notice that the drive side does not take the usual cartridge BB tool. Any old lockring tool from the bygone era will do. This Park HCW-5 is ~$15 on eBay. I don't know if the 3-tooth end lines up, but I spent many years securing lockrings with a single-tooth tool.
I have ordered the Shimano tool. Like I said, I was hoping for a tool designed to be used with a ratchet.
J
11-28-16, 09:43 PM
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J, I posted the instructions because it doesn't look like there is a tool from an alternative manufacturer that'll substitute...I looked. I thought about a single pin wrench, but if I remember correctly, there's a bit of a rounding of the outside edge making for an unstable platform. The Shimano tool looks to be the only one to withstand the torque.
Brad
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11-28-16, 09:49 PM
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Brad, sincerely, I appreciate you efforts and everyones. I have come to the conclusion that you are correct, therefore, I ordered one. It should be here soon. Kind of a Snapon price. 
11-29-16, 08:37 AM
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It's way late in this thread to say anything but why are you using a DA Octalink? As you have discovered they use nonstandard tools and will require routine maintenance.
The Ultegra level Octalink (BB-6500) is out of production and hard to find but the 105 version (BB-5500) is still available from several dealers. Both install with conventional tools and are very durable.
The Ultegra level Octalink (BB-6500) is out of production and hard to find but the 105 version (BB-5500) is still available from several dealers. Both install with conventional tools and are very durable.
12-03-16, 08:21 PM
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I do not know, beczuse I had one I suppose. Yes, the 105 BB V1 is easier, I just installed one of those in another bike. But, the new tool came in today and it worked like a charm. The tool I mean is the Shimano TL-FC31. It had no tendency to slip off and made easy work of the Dura Ace BB. So there you go. I have one more of those DA BB Octolink V1 type.
12-04-16, 06:39 AM
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It's way late in this thread to say anything but why are you using a DA Octalink? As you have discovered they use nonstandard tools and will require routine maintenance.
The Ultegra level Octalink (BB-6500) is out of production and hard to find but the 105 version (BB-5500) is still available from several dealers. Both install with conventional tools and are very durable.
The Ultegra level Octalink (BB-6500) is out of production and hard to find but the 105 version (BB-5500) is still available from several dealers. Both install with conventional tools and are very durable.
12-04-16, 10:51 AM
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The Shimano tool is much different from the HCW-5.
The DA BB, I am not sure it is really any lighter. The bearing design is different. Other than needing a tool, I did not find it difficult to install. All the way in, back it out 1/16 turn, tighten lock ring. Having the correct tool made it easy.
But the tool, which comes with and serves double duty as a head set pair, I guess, was expensive, around $70ish.
J
The DA BB, I am not sure it is really any lighter. The bearing design is different. Other than needing a tool, I did not find it difficult to install. All the way in, back it out 1/16 turn, tighten lock ring. Having the correct tool made it easy.
But the tool, which comes with and serves double duty as a head set pair, I guess, was expensive, around $70ish.
J
