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  1. #1
    Senior Member PanicDog's Avatar
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    FSA K-Force Light Crankset Syringe

    I bought an FSA K-Force Light compact crankset and I want to install it onto a frame I bought off eBay.

    The crankset came with a syringe of clear gel, but this isn't mentioned anywhere in the instructions (http://road.fullspeedahead.com/downloadfly.aspx?download=downloads/FSA+K+Force+Light%2c+SL-K+Light%2c+Team+Issue+(new)+Carbon+Crankset+Instructions.pdf).

    The instructions say to "Prepare all threaded contacts(i.e. grease the BB shell threads when installing cups, threadlock all bolts, etc.)."

    My frame already has some blue grease on the BB shell threads. Am I supposed to remove that and use the supplied clear gel instead?

    What does it mean to "threadlock all bolts"?

    Also, what does FSA mean by "etc." How can you put "etc." on installation instructions?! Are there other specific steps involving grease, loctite, etc. that I need to know about?

    Thanks!
    Last edited by PanicDog; 02-06-09 at 07:00 PM.

  2. #2
    Senior Member PanicDog's Avatar
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    I found some more information in the MegaExo FAQ. (http://road.fullspeedahead.com/downl...AQ_MegaExo.pdf)

    "An amber retaining compounded (Loctite 641) will be included with all carbon Mega
    Exo cranksets. The retaining compound should be applied to the spindle and left
    arm spindle before installing the left arm onto spindle. There should be no grease or
    oil residue in the area of splines before compound and left arm installation."

    I don't think I received that with my crankset - it seems different from the clear compound that was included in the syringe with my K-Force Light.

    I'm guessing the clear stuff in the syringe is grease. If that is the case, would it be best to remove the existing grease from the bottom bracket shell? What should I use to remove it?

    Thanks!

  3. #3
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    Here's the Loctite 641 that FSA includes: http://aebike.com/page.cfm?action=de...=30&SKU=LU4606

    The blue stuff on the bearing shells is a threadlocker that has been preapplied. Do not remove it. The sam stuff should also be on the pinch bolts or single fastening bolt for the non-drive side crankarm. Again, leave it there and install the bolts as you normally would.

    My guess is that your syringe is the Loctite 641 as the external bearing cranks don't usually require any grease for installation.

    On rereading your post, it sounds like you have some leftover blue threadlocker inside of your bottom bracket shell. I would remove as much of that as possible before installing the new cups. If the hardware supplied by FSA does not have any type of threadlocker preapplied, I would apply something like this to the threads: http://www.amazon.com/Loctite-Thread.../dp/B000XSGJKY
    Last edited by joejack951; 02-06-09 at 06:29 PM.

  4. #4
    Sledge Hammer FightingPanther's Avatar
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    oh thats the EPO just inject into arm...
    "What lies behind us and what lies before us are small matters compared to what lies within us."
    Ralph Waldo Emerson

  5. #5
    Senior Member PanicDog's Avatar
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    If grease is not required, why do the instructions say to grease the BB shell threads? I took another look at my shell. Most of the grease (I assume it is grease) is inside the shell, but not on the threads.

    Here is what everything looks like if that helps.

    Shell:


    Cups:


    Bolt:


    Syringe:

  6. #6
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    I think you got the limited edition BALCO crankset....was it signed by any former baseball players?

  7. #7
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    Quote Originally Posted by PanicDog View Post
    If grease is not required, why do the instructions say to grease the BB shell threads? I took another look at my shell. Most of the grease (I assume it is grease) is inside the shell, but not on the threads.

    Here is what everything looks like if that helps.
    If the instruction say to grease the cups, then grease the cups.

    Your shell has old grease inside of it. Since you'll be greasing the cups anyway, I wouldn't even bother trying to clean it out.

    I have no idea what's in the syringe.

  8. #8
    I have senior moments... bikinfool's Avatar
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    Well the syringe doesn't seem to have the amber Loctite 641, nor do I have an idea what's in the syringe or what should be in the syringe; might be worth a call to FSA or the shop you bought it from.

    I take it your bike frame is not new and that is just some remaining grease in your shell from the last bb installation; clean the threads of the shell thoroughly and regrease as indicated in the instructions. The bit of green substance on the cups appears to be a threadlocker and hopefully is intended to work with the greased threads in the shell. The blue stuff on the bolt is very likely a medium threadlocker (probably 242 Loctite or equivalent).

    If you want to read about thread concepts and related things like preparation and threadlockers this might be a good article http://parktool.com/repair/readhowto.asp?id=89
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
    Road bikes: TST, Trek 2300 (Carbon/Alum)

  9. #9
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    I contacted FSA through their website about the syringe - will let you know what it is for when/if I hear back.

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