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Stihl 044 Oiler Mod

Discussion in 'Chainsaws' started by huskihl, Oct 30, 2017.

  1. huskihl

    huskihl Sausage Lives Matter

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    Several people have asked about modifying oil pumps for more flow so they can run a longer bar. @dolmarkid sent me 2 oilers for a Stihl 044 and I thought I'd take a few pics along the way to help show others how I do it. This mod will allow an 1128 series to run a 32-36" bar and oil it sufficiently. I'm sure it'll work for other models too.


    As received

    20171030_003512.jpg

    After a trip through the parts washer

    20171030_003559.jpg

    1st, I push the control bolt inward to remove any tension on the roll pin.

    20171029_163344.jpg

    This is where the roll pin is located. I punch out the roll pin with an appropriately sized punch.

    20171029_163350.jpg

    Or in this case, a perfectly sized drill bit. I set my vise jaws about 1/4" apart and center the pin in the gap. Then tap the pin out

    20171029_164018.jpg
     
  2. Dub11

    Dub11 Saw R skeery GoldMember

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  3. huskihl

    huskihl Sausage Lives Matter

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    Once the roll pin is tapped out, grab your flashlight and shine around on the floor and find it. I tap the pin about half way out while holding onto the punch, and then hold one hand underneath and tap it the rest of the way out.

    Next, you need to remove the control bolt. I wiggle it back and forth while prying up with a screwdriver. There are rubber o rings that are holding it in there

    20171029_164648.jpg

    Once the control bolt is removed, the oil pump shaft can be removed

    20171029_165338.jpg

    Be careful when removing the shaft, as there are 2 washers with a spring between them. The inner washer almost always wants to stick inside the pump

    20171029_165346.jpg


    Note the offset on the end of the bolt. This is what controls the movement of the pump shaft, along with the ramp on the shaft, back and forth

    20171029_170508.jpg

    Here are the 2 pieces as they are oriented inside the housing. When you adjust the control bolt, you are controlling how much the pump shaft can move back and forth due to which part of the concentric end of the bolt is touching the shaft.

    20171029_165744.jpg
     
  4. huskihl

    huskihl Sausage Lives Matter

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    In order for the pump to flow more oil, I like to give the piston more stroke. To do this, find the lowest part of the ramp

    20171029_165932.jpg

    and measure how far it is from the end

    20171029_171014.jpg

    I've found .015-.020" more ramp to be sufficient. I do this with a cut-off wheel and a diamond burr to polish it

    20171029_172129.jpg

    You'll also need to remove that same .015" from the corresponding area of the end of the control bolt where it's in the "max oil" position
    20171029_172343.jpg
     
    Last edited: Oct 30, 2017
    redpete79, pavel408, mettee and 22 others like this.
  5. beaglebriar

    beaglebriar Peanut gallery

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    Fool....shouln't you outta be sleepin' n stuff?
     
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  6. huskihl

    huskihl Sausage Lives Matter

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    On the opposite end of the pump shaft, you'll notice a cupped area. This is what grabs the oil and allows it to be pumped out. I like to make this area a little bit larger. So measure where the edge is

    20171029_172429.jpg

    And cut it a little bit bigger

    20171029_172837.jpg

    I also do this with a Dremel cut-off wheel. Make sure there aren't any rough edges on the shaft that could score up the inside of the pump


    Now it's time to reinstall the shaft with the washers and spring. I hold tension on it against the spring so I can install the control bolt

    20171029_173052.jpg

    Install the control bolt by twisting it back and forth. I spray some oil on the bolt to aid with assembly.

    Next, tap the pin back in

    20171029_174423.jpg

    And you're done

    20171029_173133.jpg
     
    Last edited: Oct 30, 2017
  7. huskihl

    huskihl Sausage Lives Matter

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    Soon.
     
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  8. Dub11

    Dub11 Saw R skeery GoldMember

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    Move along nothing to see here husky man.
     
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  9. beaglebriar

    beaglebriar Peanut gallery

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    Lol.. I work on a lot of ms290's that could benefit from this.
     
  10. Cracker Boy

    Cracker Boy Fl cracker

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    Great thread kevin but im still gonna let you do it when im on my feet thanx for sharing
     
  11. huskihl

    huskihl Sausage Lives Matter

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    ***NOTE***
    After doing this to my 066, it will now occasionally run the bar oil tank dry before it runs out of gas. This can be rectified by either not turning the screw all the way to max, or by not filling the gas tank completely full
     
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  12. Cracker Boy

    Cracker Boy Fl cracker

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    You read my mind was bout to ask that question .can you do 036 and 064 as well?.i meant to ask you that the other day.
     
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  13. huskihl

    huskihl Sausage Lives Matter

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    064, yes. And i would believe so on an 036, though I've never done one
     
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  14. Cracker Boy

    Cracker Boy Fl cracker

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    I may have to be your guinni pig.im sure you could.i do know 036 064 take the same oil line kit with the hose behind the clutch thats a pain in the azz.
     
  15. Dub11

    Dub11 Saw R skeery GoldMember

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    Is something like this possible on a fix oiler say of a 026?
     
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  16. drf256

    drf256 Dr. Richard Cranium (“RC” to Muh pals) GoldMember

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    Great job Kevin.

    I’m wondering on an o36 as well. We can make em strong enough to pull a 28, but oiling it is another problem.
     
  17. mdavlee

    mdavlee Hillbilly grinder

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    Any stihl oiler will be the same from what I've seen. I don't even touch the control bolt. Just the piston. Seems to not drain before the fuel. Factory HO is only .2mm longer stroke so .008" is all
     
  18. T.Roller

    T.Roller Mastermind Approved!

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    Great thread Kevin. I've been meaning to do this to my hybrid for awhile now. The oilers on these saws are pitiful.
     
  19. Onan18

    Onan18 OPE Sponsor GoldMember

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    HOORAY 288 & 395!
     
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  20. drf256

    drf256 Dr. Richard Cranium (“RC” to Muh pals) GoldMember

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    Can an 046 oiler be modded to fit an 044?

    Something inherently not sexy about oilers. Kinda like brakes on a hot rod, we do all we can to get more go when the STOP is what matters more.
     
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