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threads

Discussion in 'Skid Steers' started by jsmith6752james4now, Jul 3, 2020.

  1. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    Can the treads on the end of the cylinder end be chased? I had a tough time getting the seal end off and now it on goes in about 4 turns. I hope I don't have to buy a new cylinder tube. thanks
     
  2. Ct Farmer

    Ct Farmer Senior Member

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    Internal or external threads? On external I’ve often used a knife edge file to carefully clean out burrs.
     
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  3. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    It's not the gland threads it'e the tube end threads.
     
  4. Ct Farmer

    Ct Farmer Senior Member

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    Right, so is the tube threaded on the inside or outside?

    Perhaps post a picture so we can see what you are dealing with.
     
  5. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    The treads are on the inside.The gland screws into them.
     
  6. DMiller

    DMiller Senior Member

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    There are thread files available can get them from such as MSC, Grainger, I found a set with tip end files for internal threads as this at McMaster Carr. Can take a conventional Tap of that thread TPI and use it sideways as a file if the threads are boogered up.

    https://www.mcmaster.com/thread-repair-files/
     
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  7. Ct Farmer

    Ct Farmer Senior Member

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    Yup, thread files, a tap the right pitch, just carefully scrape one flute though the damaged area. I have also used a thread cutting tool from the lathe and scraped with that. Carbide is best if you have it. I’ve also got some really fine hooked jewelers files that are useful for this sort of thing.

    You probably only have one small area that is damaged right at the point it starts to hang up.

    Though not likely there is a chance the tube is no longer round or has been slightly damaged distorting the thread.
     
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  8. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    good info...thanks
     
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  9. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    How do I determine the thread size?
     
  10. Ct Farmer

    Ct Farmer Senior Member

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    You need a thread pitch gage. Depending on machine could be SAE or metric.
     
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  11. mikebramel

    mikebramel Senior Member

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  12. jsmith6752james4now

    jsmith6752james4now Well-Known Member

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    Does anyone have the torque spec for the lift boom cylinder nut on a 1840 case? I have a manual for a 1839? I need one for a 1840.....thanks