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  1. #1
    Click avatar for tech links/info, donation request K447's Avatar
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    Arrow Domestic engine - What is the thread size for the main crank case studs?

    I was about to remove the long case studs from my crank case and realized I did not have the correct matching sized nuts to jam together and extract the studs. What is the specified thread size for those studs?

    Any tips for removing those studs without causing extra grief for myself or the studs?

    Thanks in advance.


  2. #2
    Measure the height that the studs stick above the case before removing them so you will know how far to thread them in when reinstalling them. When I threaded the studs in on my pro 1200 case I applied a small amount of torque on them and ran them in too far. When I put the cylinder on there wasn't enough thread showing so I had to back them out some. I don't think the threads went all the way to the bottom of the hole in the case so when I was torqueing down the studs I was also extending the thread length. So it wasn't easy backing the studs out because the threads were screwed up.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Hi Keith. Welcome back !!!!!


    M10 X 1.25

  4. #4

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    Quote Originally Posted by K447 View Post
    I was about to remove the long case studs from my crank case and realized I did not have the correct matching sized nuts to jam together and extract the studs. What is the specified thread size for those studs?

    Any tips for removing those studs without causing extra grief for myself or the studs?

    Thanks in advance.
    a little heat to soften the locktite and chase the theads

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by xlint89 View Post
    Hi Keith. Welcome back !!!!!


    M10 X 1.25
    Xlint information

    Thanks.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Loctite guidelines for heat removal of thread locker compounds

    Quote Originally Posted by rr44red View Post
    a little heat to soften the locktite and chase the theads
    Define 'little heat'

    http://www.loctite.com.au/cps/rde/xc...L.htm#item3290

    Quote Originally Posted by Loctite Australia web site
    The application of heat is needed to remove a fastener that can't be removed with a hand tool. Temperatures of 325F and above is needed to break down a standard anaerobic, 500F for high temperature Anaerobics.

    A heat gun or propane torch is commonly used to do this process, and careful disassembly should occur while parts are still hot.

    Once apart, and cooled, use methylene chloride (Chisel #79040) to remove cured excess material.

    Always wipe down the fasteners with clean up solvent to remove the wax film that Chisel leaves on the surface.
    Two step chemical cleaning process; Chisel 79040 to remove the thread locker stuff, then a regular solvent to remove the Chisel residue.

    Loctite Chisel MC-Free Gasket Remover

  7. #7

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    i used a torch to heat the case then removed the stud one at a time.when cooled placed on a piece glass to make sure nothing twisted.it worked for me

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