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Installing Small Earless Piston Pin Circlips?

Discussion in 'Technical Area' started by SteveSr, Dec 7, 2018.

  1. SteveSr

    SteveSr Active OPE Member

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    Hello,

    I'm stumped and could use a little creativity or prior knowledge here. I am trying to install a new piston as shown in the attached photos. So far after messing with it and a pair of jewelers screwdrivers for about 45 minutes and chasing the clip around the garage floor a couple of times I am no closer to getting it installed. The only good news is that I still have both the new and old clips! I am beginning to learn why Stihl has a special tool for this... which I, unfortunately, don't have.

    Tried some small sockets as pushers but the one that fits inside the pin bore allows the clip to ride up and over it while the next one up won't push the clip into the bore.

    What am I missing?

    Thanks,
    Steve

    IMG_6294.JPG

    IMG_6292.JPG
     
  2. Deets066

    Deets066 AKA Deetsey

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    I use a tuning screw driver with the small notch ground in the end of it
     
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  3. SteveSr

    SteveSr Active OPE Member

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    Is this just a regular small flat screwdriver or one of a multitude of tamper-proof variants? A photo would be helpful here.

    Thanks,
    Steve
     
  4. Deets066

    Deets066 AKA Deetsey

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    Regular screwdriver, just grind a small “V” in the tip.
    Oh, and try not to shove it through your thumb. It hurts when that happens
     
  5. beaglebriar

    beaglebriar "I have a potty mouth" + GFY

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    Hahaha....Yeah that's the worst.

    A flat file works good to make the notch.
     
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  6. Deets066

    Deets066 AKA Deetsey

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    Yesp
     
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  7. Termitebuffet

    Termitebuffet Home of the corn can muffler .....

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    Half decent picture[​IMG]

    Sawhawgz, ruining the internet since 2012...
     
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  8. SteveSr

    SteveSr Active OPE Member

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    So what is the technique with the notched screwdriver? Press the center of the ring down into the removal gap in the piston and then work either end down into the grove alternately a little at a time?
     
  9. SteveSr

    SteveSr Active OPE Member

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    I hate it when that happens! My thumb is still recovering from getting scissored in a double hung window when it decided to break loose. And that was a month ago!
     
  10. Wonkydonkey

    Wonkydonkey Pinnacle OPE Member

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    The way I do it is, get one end of the clip in the recess just over or about halfway round opposite the cutout. and work my way round. And have a fingertip always on the clip. So if you slip it don’t go ping. The cutout helps in getting it in the recess

    Much easier to show than type
    Cheers
     
  11. Al Smith

    Al Smith Pinnacle OPE Member

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    I made this contraption a few years ago after being frustrated trying to install the itty bitty clips for a Stihl 200T .It works pretty good------after thought --I use an ice pick to pluck out the clips and snatch them with a pair of needle nose pliers .Once they get loose they can fly a mile and you'll never see them again.
     

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    Last edited: Dec 8, 2018
  12. Al Smith

    Al Smith Pinnacle OPE Member

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  13. SteveSr

    SteveSr Active OPE Member

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    This is starting to look like the Stihl tool.
     
  14. Al Smith

    Al Smith Pinnacle OPE Member

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    It really wasn't my idea .I kind of copied what they had at work to "hand pin" the rod and piston assembly on Ford engines that were normally done by machine . I think the auto engine are 20MM and the little Stihl 200T is only around 8 mm .Being so tiny I couldn't copy the sliding sleeve that held the clip .
     
  15. Termitebuffet

    Termitebuffet Home of the corn can muffler .....

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    It's allot on what you feel comfortable with , I'll start one side then work around , or a set of goofy needle nose...but I've got the still tool now ...no more struggle...I've heard some guys put a zip lock bag around it to contain stray piston clips ...

    Sawhawgz, ruining the internet since 2012...
     
  16. beaglebriar

    beaglebriar "I have a potty mouth" + GFY

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    The bag is a great idea, never tried it.

    These little saw circlips can be very trying. Motorcycle/ATV clips are a cakewalk in comparison.

    I like to start with the closed side in and work them around. I'd really like to try the Stihl tool one of these days.
     
  17. Termitebuffet

    Termitebuffet Home of the corn can muffler .....

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    Swing by the shop you can try mine ....

    Sawhawgz, ruining the internet since 2012...
     
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  18. beaglebriar

    beaglebriar "I have a potty mouth" + GFY

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    Someday when I have an extra 10-12 hrs and feel like a drive I'll do that Randy. Lol
     
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  19. Deets066

    Deets066 AKA Deetsey

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    I put one side in, then just push it in at about 3/4 the way around
     
  20. Termitebuffet

    Termitebuffet Home of the corn can muffler .....

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    You're welcome anytime , I'll even buy you supper....

    Sawhawgz, ruining the internet since 2012...
     
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