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Thread: Harely Oil Pump Tool

  1. #1
    Join Date
    Mar 2005
    Location
    Huntington, New York - American Zone
    Posts
    801

    Default Harely Oil Pump Tool

    I've been toying around with possible fixes for leaking Harley knucklehead and panhead oil pump inlet check valves. When these cast iron pumps age, many develope what appear to be corrosion-related pockets in the cast iron seat that the spring-loaded inlet check ball rests upon. This seat/ball seal is important as improper sealing allows the old from the oil tank to leak through the oil pump into the motor's lower end when the motor is not running.

    I first used a 3/8" ball bearing that I brazed to a rod as a lapping tool. I would use this tool with valve grinding compound in an atempt to lap the old seat smooth again. Aside from providing a very good cleaning of the seat area, this generally does not work, as many pitted seats need a deeper cut to get them smooth again.

    Next attempt was to use the commercailly-available aftermarket inlet seat cutter. Again, very little success. Unless mine was mis-manufactured, even when lightly turning the cutter against the inlet set manually, the cutting surfaces go dull after one use (at best). Maybe they're only supposed to be used on aluminum pumps? If so, they don't tell you that. One would also think that the cutters would be hardened - even slightly?? More hard-earned money down the drain. Very frustrating.

    Tom Cotton then suggested a burnishing tool of his own making that has worked out well for him. A very interesting concept that uses a hardened ball that is forced and twisted onto the inlet seat thereby burnishing the cast iron seat material smooth again. I tried it on my '47 FL pump with no success. Knowing of Cotton's abilities, I'm sure it works in most cases. But I must have a really damaged pump body, as the lower end still fills up with oil when it sits for a week or so and the pump shaft-to-bushing clearance isn't excessive. Unacceptable.

    I am now consdiering contacting a tool Manufacturer to cut a piloted cutter similar to the one that is currently available, but with three removable carbide blades similar to those that one might use on a boring bar.

    Another possibility is having a removable 3/8" wide, 45-degree cutting stone mounted on the piloted shaft with an upper handle that one would spin manually (similar to a valve lapping tool), thereby slowly grinding in and smoothing a new seat surface. This surface would have to be lapped afterward, as describe above. I really like this idea, but making the small stone would probably be a problem. Maybe a permanent stone using a diamond grade abrasive for long use?

    Third possibility might be to machine a pocket into the pump body and press in a seal or O-Ring upon which the spring-loaded inlet ball would sit and provide the necessary oil sealing.

    After rambling above ad-nausia, I finally get to ask my question - do any of you know of a good (and affordable) tool house that might make the tooling proposed above? Do any of you have other suggestions. No ego here - I'll experiment with whatever works.
    Bill Pedalino
    Huntington, New York
    AMCA 6755

  2. #2
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,342

    Default

    Folks!

    Please spread the word far and wide that Liberty no longer offers oilpump ballcheck burnishers,
    as the prospect of damage from application by the general public has proven to outweigh its benefits.

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

  3. #3
    Join Date
    Jul 2008
    Location
    Richmond, IL
    Posts
    195

    Default

    Same problem on my dad's servi-car.

    If your cases are sealed well - don't think it would matter - upon startup, it would refill the oil tank. Unfortunately on my Dad's the cases are not sealed and the oil is gone after it sits for a while. Never measured how long, but it is very annoying and oil is not getting any cheaper!

    The best answer and probably the most dangerous I have heard is to install a shutoff in the oil line. That was suggested to me when I was searching for answers to it draining down. Needless to say It still has the big catch pan under it.
    _____________________________________________
    D.J. Knott
    AMCA #10930

  4. #4

    Default

    Quote Originally Posted by T. Cotten View Post
    Folks!

    Please spread the word far and wide that Liberty no longer offers oilpump ballcheck burnishers,
    as the prospect of damage from application by the general public has proven to outweigh its benefits.

    ....Cotten
    Cotten
    Do you have a picture of the Liberty burnishing tool you can post?
    Mark Masa

  5. #5
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,342

    Default

    Quote Originally Posted by MMasa View Post
    Cotten
    Do you have a picture of the Liberty burnishing tool you can post?
    Mark Masa
    Mark!

    Even though the attachment manager shows a photo I have previously uploaded,
    it will not let me "drag" it for attachment to this post. And that is the only method of selecting a photo that this site's bizarre format allows.
    And it will not upload a fresh .jpg: it just sits and spins and spins.

    The problem is not in my computer, it is in the design of this site.

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

  6. #6

    Default

    Could you email me the picture directly? Mark@linkcycles.com

  7. #7
    Join Date
    Jul 2010
    Location
    Tuscola,Texas
    Posts
    263

    Default

    The only way I've found to post certain pictures is take a picture of the computer image then load that from the camera into the computer then it will post.
    If a cutter was made should it be 45* and should there be another angle like 30* to bring the seat off a possibly erroded area? Thinking the larger radius of the ball would set in the highest point of the seat.
    Kerry

    Quote Originally Posted by T. Cotten View Post
    Mark!

    Even though the attachment manager shows a photo I have previously uploaded,
    it will not let me "drag" it for attachment to this post. And that is the only method of selecting a photo that this site's bizarre format allows.
    And it will not upload a fresh .jpg: it just sits and spins and spins.

    The problem is not in my computer, it is in the design of this site.

    ....Cotten

  8. #8
    Join Date
    Aug 2004
    Location
    Beautiful Northern New Mexico
    Posts
    2,797

    Default

    You guys do know that using a hosting site eliminates all those issues, right. You just copy and paste and it is here, and in full size!
    I can download a photo to my computer, access it from the host site, copy ad paste it here, and done, in about two minutes!
    Robbie
    Robbie Knight Amca #2736

  9. #9
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,342

    Default

    Here's the wonderful thing about external photohosting, Folks.

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

  10. #10
    Join Date
    Jul 2010
    Location
    Tuscola,Texas
    Posts
    263

    Default

    That and this site is no longer available is what happens to my manuels and tech info files. When I finally learn the tricks to operating a computer they will be obsolete.
    Kerry

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