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  1. #1
    Elite Member
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    Sep 2009
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    4,324
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    Murray, KY
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    265 MF / JD 310B Backhoe

    Default Are all O-Rings Created Equal?

    The major oil leak on the side of the transmission housing of our JD 310B BH was due to a dried out O-Ring. It occurred the first time I used the new thumb but I do not think it was related.

    Did not make it to NAPA before they closed and did not try the other guys since I need other lines and seals too so I can get those future failure points address while I am under it greasy and the tools spread out.

    My question are there different grades/qualities of O-Rings like there are for belt and hoses?

  2. #2
    Platinum Member pjbci's Avatar
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    Feb 2012
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    712
    Location
    Summit. Ms
    Tractor
    JD 4840, 450j, 310, komatsu D31px22, IH 1486, MF 135, MHF TO35

    Default

    Im positive there is a difference in the ones you might get @ napa versus the junk stores like autozone, advance auto, and oriellys.

  3. #3
    Gold Member Kioti Tom's Avatar
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    Jan 2012
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    483
    Location
    Industry, Pa- - 5 mi. north of Ohio River
    Tractor
    Kioti DS4510, Ford '48 8N, Ford '53 Jubilee, Power King 1614

    Default Re: Are all O-Rings Created Equal?

    No, All O-rings are not equal.. Oh Yes! There are many differences.If you want to really get confused go to
    google "parker o-rings" and bring up the catalog. Materials, fluids uses will stagger the imagination.
    Kioti 2012 DS4510 with FEL
    Ford 1948 8N
    Ford 1953 Jubilee
    Power King 1614
    Various 3 pt. equipment
    Sold: Ford 1946 2N, Kioti 2011 DS3510

  4. #4
    Veteran Member Combustix's Avatar
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    May 2011
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    1,493
    Location
    NW WA
    Tractor
    Kubota B2710

    Default Re: Are all O-Rings Created Equal?

    The O ring on my kegarator for the tap is still as good as the day I bought it 14 years ago. All others pale in comparison. Just saying

  5. #5
    Super Member crazyal's Avatar
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    Dec 2003
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    6,017
    Location
    Northern Vermont

    Default Re: Are all O-Rings Created Equal?

    I often deal with o-rings that could barely fit around your pinky finger that cost $400 or more. So yes there is a wide range of o-rings depending on what chemicals the are going to be exposed to, static seal vs dynamic, elasticity, heat ranges, and more.

    Even the basic Viton o-rings come in different varieties. Lately we've been seeing some plastics that work very well and are cheap entering the market. My guess is in 5 to 10 years you'll see them take over for the generic Viton and Buna o-rings.

    As far as what you'll get at the local parts store, it's anyone's guess. But it'll probably last as long as the original o-ring.
    Kubota L4240,Case 580K backhoe, Case 450 Dozer

  6. #6
    Elite Member
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    Sep 2009
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    4,324
    Location
    Murray, KY
    Tractor
    265 MF / JD 310B Backhoe

    Default Re: Are all O-Rings Created Equal?

    http://www.parker.com/literature/ORD...g_Handbook.pdf

    I see what some of you are saying. The Parker info shows the differences are many.

    First I will start with NAPA and tell them the application and judge the info.

    What bites it looks like someone had removed this main valve body feeding both the hoe and FEL circuits that boths directly to the transmission case before and replaced one of the two. One looks new like and the other one now is very undersize, pale in color and broken. The valve body is held on by three bolts and only two look OEM.

    I will replace both while there as well as the hose to the hoe since the wire layers are already loose and snagging on roots, etc.

    The BH is 29 years old and still has a lot of the OEM hoses it seems.

  7. #7
    Elite Member Baby Grand's Avatar
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    Nov 2007
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    4,095
    Location
    Windsor, CT.
    Tractor
    Kubotas: L3240GST B2320HST B5100D & G5200H

    Default Re: Are all O-Rings Created Equal?

    Are all O-Rings Created Equal?

    No.
    A lot of attention was focused on O-rings in the wake of the last flight of the Space Shuttle Challenger. Seal design and material selection depends on what type of fluids you are trying to seal and in what environments. Parker publishes what I consider to be the O-ring gospel:

    http://www.parker.com/literature/ORD...g_Handbook.pdf
    That's the problem with trouble.
    It always starts out as such fun."
    - Randall Brown

  8. #8
    Platinum Member
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    Apr 2010
    Posts
    975

    Default Re: Are all O-Rings Created Equal?

    I got a couple sets of o-rings from HF. They seem to last pretty well.

  9. #9
    Veteran Member varmint's Avatar
    Join Date
    Mar 2003
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    1,388
    Location
    Northern Maryland
    Tractor
    Kubota B8200, then a Kubota L3130 HST, now a Kubota L3400 HST

    Default Re: Are all O-Rings Created Equal?

    I can say from experience with my solar heating system that O rings are not all equal. The standard buna O rings will swell up and soften when exposed to the synthetic oil used as a heat transfer liquid. Viton works fine, but some gaskets, like the ones that came with circulator pump flanges, must be buna, because they have to be replaced with whatever comes close in viton. My biggest problem is with the expansion tank- the bladder material is not compatible, and I can't find viton bladdered tanks like the original ones from the late 70's. Always something.

  10. #10
    Platinum Member
    Join Date
    Feb 2011
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    828
    Tractor
    Furakawa 351

    Default Re: Are all O-Rings Created Equal?

    "O" rings are a bottomless pit of innovations and improvement. I worked on Class eights, and never threw out any "O" rings they all have different characteristics and uses some are made to swell. Cat was a great source.
    When in doubt get the right one, and pay the extra dollars, that is the best chance you do not have to do the job multiple times.

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