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  • #16
    Originally posted by Willy View Post
    After looking at the 7410 SKF oil seal that Captain K found and your compressor, I thought it all looked too familiar.
    I have a Speedaire twin cyl. compressor that I bought new in the late 70s that I had to replace the oil seal on shortly after I got it, probably about 1980 I think. Got to looking at my seal collection and I still have a couple of the National replacements. The National seal I put in at the time is still working great after all these years so I never needed the extras.

    If I remember correctly I sourced them at the time from an automotive parts supplier in Hooterville Canada, so if I can get them from a hick town auto parts store you shouldn't have too much trouble sourcing them locally.
    Of course that was 40 some years ago when folks actually fixed things and having a working inventory wasn't considered bad business practice.
    I went back to straight 30 weight non detergent oil, ran it hard all day yesterday and I don't see any seepage. I can't believe switching to straight 30 made all the difference.

    Parts stores don't stock much anymore like they used to. Neither do the hard ware stores, what's left of them. No industry left.

    JL................

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    • #17
      Just something I ran into when searching various web sites when seeking an oil seal ....
      I was looking for a seal with 1.750" OD. Well I was coming up with very few matches that
      had all my needed dimensions. Then some how I found a bunch of seals when I entered
      1.753" as my OD dimension.
      So hot tip I guess.... Seals are listed by actual seal OD size, not the bore they are supposed
      to fit into.
      ?? Is this true ??
      I did find 1 or 2 seals listed as 1.750" OD, but I found like 20 of them listed with the 1.753" OD
      dimension. Seems odd to me to list oil seals by actual measured size than the bore size they
      were intended to fit into.
      Any one else experience this ? ?

      --D
      DZER

      Comment


      • #18
        Yeah, I had the same thing when I was looking for freeze plugs. AKA soft plugs or welch plugs.
        Nope, you're not going nuts, it's a real phenomenon.

        Originally posted by Doozer View Post
        Just something I ran into when searching various web sites when seeking an oil seal ....
        I was looking for a seal with 1.750" OD. Well I was coming up with very few matches that
        had all my needed dimensions. Then some how I found a bunch of seals when I entered
        1.753" as my OD dimension.
        So hot tip I guess.... Seals are listed by actual seal OD size, not the bore they are supposed
        to fit into.
        ?? Is this true ??
        I did find 1 or 2 seals listed as 1.750" OD, but I found like 20 of them listed with the 1.753" OD
        dimension. Seems odd to me to list oil seals by actual measured size than the bore size they
        were intended to fit into.
        Any one else experience this ? ?

        --D
        25 miles north of Buffalo NY, USA

        Comment


        • #19
          And I am tired of having people try and correct me when I refer to an 1800 or 3600 rpm motor.
          I know the tag says 1750 or 1725. It is still am 1800 rpm motor. Stop trying to correct me.

          Another thing, I am looking for parts for a Dodge pickup. Not a Ram. A Dodge.
          I don't care if Dodge changed where the money goes, and call themselves Ram.
          It is a Dodge. When it was built, it is a Dodge. Still is a Dodge. Just because your parts computer
          says Ram, does not make it a Ram. It is a Dodge. STOP trying to correct me. I know what I am
          talking about. Don't try to tell me my business or I will take my business elsewhere.
          I hate people.

          -D
          DZER

          Comment


          • #20
            ZOMG you too ????
            (tell them you know the difference between apparent slip and real slip in motor applications)

            (the trick is to ask them who Ram trucks are built by)
            parts stores nowadays are completely useless, try buying a belt without having a year make and model then tell them is for a non-automotive application. Watch the brains asplode.
            All those stores are for, is for weekend parts-changers serviced by sales droids who have to fill in a database field.

            (seriously, on the truck parts, I've been having better luck on craig list lately)

            I prefer cats -- they're more logical than humans, and cleaner too.

            Originally posted by Doozer View Post
            And I am tired of having people try and correct me when I refer to an 1800 or 3600 rpm motor.
            I know the tag says 1750 or 1725. It is still am 1800 rpm motor. Stop trying to correct me.

            Another thing, I am looking for parts for a Dodge pickup. Not a Ram. A Dodge.
            I don't care if Dodge changed where the money goes, and call themselves Ram.
            It is a Dodge. When it was built, it is a Dodge. Still is a Dodge. Just because your parts computer
            says Ram, does not make it a Ram. It is a Dodge. STOP trying to correct me. I know what I am
            talking about. Don't try to tell me my business or I will take my business elsewhere.
            I hate people.

            -D
            25 miles north of Buffalo NY, USA

            Comment


            • #21
              http://www2.chicago-rawhide.com/popu...kup_457010.htm

              CR seal lookup by size, for future reference. Note SkF owns CR and Timken owns national. In general they still use CR/ National numbers.

              Comment


              • #22
                Originally posted by Doozer View Post
                Just something I ran into when searching various web sites when seeking an oil seal ....
                I was looking for a seal with 1.750" OD. Well I was coming up with very few matches that
                had all my needed dimensions. Then some how I found a bunch of seals when I entered
                1.753" as my OD dimension.
                So hot tip I guess.... Seals are listed by actual seal OD size, not the bore they are supposed
                to fit into.
                ?? Is this true ??
                I did find 1 or 2 seals listed as 1.750" OD, but I found like 20 of them listed with the 1.753" OD
                dimension. Seems odd to me to list oil seals by actual measured size than the bore size they
                were intended to fit into.
                Any one else experience this ? ?

                --D
                I've noticed that as well and it kind of threw me. The seals actually measure a few thou over the bore dimension so they seal tightly but didn't expect them to be listed by that size.

                I don't believe all mfg.'s list their seal sizes that way.

                JL...............

                Comment


                • #23
                  Originally posted by JoeLee View Post
                  I've noticed that as well and it kind of threw me. The seals actually measure a few thou over the bore dimension so they seal tightly but didn't expect them to be listed by that size.

                  I don't believe all mfg.'s list their seal sizes that way.

                  JL...............
                  I know. This internet searching stuff is handy for sure,
                  but if I would have had a PAPER copy of a seal interchange book
                  I would have seen the list of sizes down a column and noted the
                  size identification scheme they chose to use.
                  When you use a search engine, you can't tell squat.
                  I treasure paper catalogues for that reason.
                  Most people can't be bothered.
                  But I have learned SO MUCH from paper catalogues.
                  That is why McMaster Carr catalogues are so in demand.

                  --Doozer
                  DZER

                  Comment

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