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48 Pan Check Valve Seating Problem

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  • 48 Pan Check Valve Seating Problem

    Hi Guys

    My ’48 Pan has been idle for some months and had some pints of oil in the crankcase, which I drained.

    I have the proper spring installed in the oil pump check valve (1 x 8/32” long). It seems the ball bearing is not seating, and oil appears to drip from the crankcase drain hole every 5 seconds.

    Is there a way to seat the ball, without taking the oil pump off the motor? I’ve tried tapping it with a bolt and mallet but with no discernible result.

    Thanks

    Greg


  • #2
    I did a seach of the Forum using "check ball". There's a few threads available. Then one under Panheads seem to be the most informative.

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    • #3
      Originally posted by sswaney View Post
      I did a seach of the Forum using "check ball". There's a few threads available. Then one under Panheads seem to be the most informative.
      A link would be nice, SSwaney!

      Here's one: https://forum.antiquemotorcycle.org/...ting-ball-seat

      ....Cotten
      AMCA #776
      Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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      • #4
        MMMMMnnn! - interesting, I'll have to think about this one then?

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        • #5
          Originally posted by harleygreg View Post
          MMMMMnnn! - interesting, I'll have to think about this one then?
          Do you have a lathe and a diamond dresser, Greg?

          ....Cotten
          AMCA #776
          Dumpster Diver's Motto: Seek,... and Ye Shall Find!

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          • #6
            https://forum.antiquemotorcycle.org/...mp-check-valve

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            • #7
              Thanks Cotten and sswaney, I need to check the flow rate as it seems to have reduced significantly, and check if there is any flow through the pump shaft by sealing the ball bearing hole. I've got a couple of ideas and will come back in a week or so, thanks

              Greg

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              • #8
                Let it puke. Add oil as needed.

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