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Rebuilding a SEHP pump?

Discussion in 'Fisher Engineering Discussion' started by 72gts, Jan 11, 2009.

  1. 72gts

    72gts Junior Member
    Messages: 9

    Has anyone torn thier SEHP pump down and rebuilt the entire thing? I plan on doing mine in the spring and replacing all seals, gaskets, pump and motor. Basically starting from an empty pump case. I don't know how old the pump is and now I'm having freeze up issues. I replaced the fluid in the fall but when temps go down to 15 or so I start having trouble.

    Anyway, if someone has done this rebuild and has any suggestions I would like to hear them- good or bad. Thanks. Ron
  2. Big Dog D

    Big Dog D PlowSite.com Addict
    Messages: 1,134

    We have done them before they aren't too bad to do. Here is a link to the Mechanics guide for the SEHP units it should help you out. http://www.fisherplows.com/pdf/21935_120098.pdf

    FWIW use the Fisher blue fluid when you do it it works much better than ATF or Hydraulic fluid.
  3. 72gts

    72gts Junior Member
    Messages: 9

    Thanks Big, I used the blue fluid to top it off in the fall but I suspect there is some water from condensation form the pump sitting around. Thanks for the link also. Ron
  4. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,039

    Organize, find the best possible work area and clean everything out of it before you begin. Pin up the exploded version on page 8 of the guide Big Dog just gave you over where you'll be working. I laid everything out systematically when I removed each section to assure I didn't mix anything up, and that it got put back together in the right manner.
  5. 72gts

    72gts Junior Member
    Messages: 9

    That seems to be the plan. Like rebuilding a carburetor I guess. Just hoping it will last till spring. Thanks for the help. Ron