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Stihl 075 Oiler seals

Discussion in 'Chainsaws' started by NPKenny, Nov 8, 2018.

  1. NPKenny

    NPKenny Well-Known OPE Member

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    Saw is an 075AV.

    I’ve searched and found many threads on the oiler, but am uncertain about which seals are the culprit for bar oil feeding into the crankcase.

    Would someone please ID which seal and possibly the part # is what I am looking for? The actual pump is pictured below.

    Thank you!



    A34518C1-E9EE-4E33-B6F8-E387E1B47382.jpeg 5263CF05-ECFB-453B-989B-AF9A5C7E6F20.jpeg
     
  2. DND 9000

    DND 9000 Super OPE Member

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    I`m not 100% sure if I`m right, but as I see it, it can be the

    oil pump sealing ring in your pic 1111 647 9001,
    gasket between the cranckcase halves 1111 029 0501

    maybe someone other chimes in and can say you more.
     
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  3. NPKenny

    NPKenny Well-Known OPE Member

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    Thank you. For clarification, is the sealing ring the common-looking o-ring or the rubber sleeve? Neither look terrible nor as if they would allow as much oil into the crankcase as was there. I was expecting a more substantial break or larger port to be sealed.
     
  4. DND 9000

    DND 9000 Super OPE Member

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    I mean with "sealing ring" the part on the top of the oil pump with the hole in it. I think you call it rubber sleeve. But I`m no expert with these pumps.
     
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  5. Chainsaw Jim

    Chainsaw Jim #fartedinthebandwagon

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    The oil pump shouldn't leak into the crankcase if the o rings are blown. It'll leak everywhere else though.
    I suspect you have a case gasket problem or loose case bolts. If the bar oil is leaking heavily on a leaky crank seal then I suppose it could vacuum some in, but a seal that loose would likely prevent the saw from ever running.
     
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  6. NPKenny

    NPKenny Well-Known OPE Member

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    This makes sense to me and is a root of why I’m posting. Threads across multiple sites claim the 041, 051, 075 / 076 feed bar oil into the crankcase this way due to the placement of the pump. Almost all of the threads end with the recommendation to replace the seals and no follow-up.

    Obviously, this is not a series of saw I am familiar with.
     
  7. kfd518

    kfd518 Well-Known OPE Member

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    3E6EC775-C43E-4371-8842-8A26173AA77F.png I beg to differ on this. The Oiler shaft goes into the crank case behind the oil seal the oils seal actually seals on the Oiler worm gear on these saws and the o ring #6 is known for leaking on these pump shafts mine did it as well. There is a Viton oring available, dimensions are 7mmx1.5mm can get at MOST parts stores.
    The larger rubber sealing ring #9 or #10 can be found online as well please check your machine serial number per the ipl page pictured as it will show you which one to get. The o rings #1 and #2 should also be replaced at the same time.
     
    Last edited: Nov 12, 2018 at 1:34 PM
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  8. NPKenny

    NPKenny Well-Known OPE Member

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    This IPL and the dealer IPL show the "rubber ring" (part #9 and #10) without the foot (see picture of actual ring in first post). The local dealer was not confident in ordering the correct rubber ring as either of the part numbers listed. Will the 1111 647 9000 ring without the foot work on this model?

    For reference, the 041 ring has the foot but is much thicker and appears to have incorrect dimensions to transfer to the 1111 series saws.

    I have come across a few discussions on this, but no updates on what works.

    Thank you!
     
  9. kfd518

    kfd518 Well-Known OPE Member

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    The part you need is dependent upon your serial number as shown on the ipl page I posted a picture of. After the serial number noted in the photo you need #9, before that serial number you need #10.
    Your dealer likely has the latest ipl which only shows the later changes I don’t know why Stihl does this but the old paper pile show the changes much better and had previous part numbers also
    Edit
    From what I can tell your part is#10
     
    Last edited: Nov 13, 2018 at 1:57 PM
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  10. NPKenny

    NPKenny Well-Known OPE Member

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    Thank you!
     
  11. kfd518

    kfd518 Well-Known OPE Member

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    Please see the edit in the last line of my last post I believe you have#10

    Edit
    The one with the foot (9)actually sat above the roll pin iirc. The solid one(10), the pin goes through the rubber ring.
     
  12. NPKenny

    NPKenny Well-Known OPE Member

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    Excellent. This saw doesn't have a serial number. The unpainted area is blank and looks factory milled where the serial number should be. I think this had a replacement PTO side case at some point.

    The case half is 9 1111 020 2910 if that is helpful in confirming.

    I am going to make an order for #10.
     
  13. kfd518

    kfd518 Well-Known OPE Member

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    I can’t help you in the blank sn part but I would guess you are correct that it is a replacement case half
     
  14. Chainsaw Jim

    Chainsaw Jim #fartedinthebandwagon

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    Somehow I'm trying to remember another seal in there that isn't pictured in the ipl. But I'm probably just mixed up with another model. I have one that's pretty stripped down, so I'll have a look to figure out why I said that.
     
  15. kfd518

    kfd518 Well-Known OPE Member

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    They are all pictured in the IPL. But when you look at it the crank case oil seal seals against the oil pump drive worm not the crank shaft. The pump drive shaft and threads of the worm are behind the crank case oil seal on these. Most of the newer dated IPL’s don’t show previous discontinued parts just the newer ones.
     
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