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Rebuild or replace MM2 SEHP?

Discussion in 'Truck & Equipment Repair' started by foxt, Apr 25, 2008.

  1. foxt

    foxt Junior Member
    Messages: 5

    Truck caught fire with the plow on it, and I couldn't disconnect it to get it away from the heat. Everything truck-side is gone. Looks like the paint is ok on the power pack, so I am hoping that the motor is ok. Seal is shot on the lift ram, I don't know about the side rams but they don't look like they got very hot either. The valve assembly cover partially melted, and I haven't gotten it apart yet but I suspect that needs to be rebuilt. I have an identical 95 dodge to move the push plates to so I am considering my options:

    1. buy a new power pack along with everything truckside and off I go (somewhere in the neighborhood of $1800 for new parts)
    2. try to rebuild the power pack I have, hope that it's just the lift ram seal and valve assembly that need to be replaced (maybe $800 - $1000 new parts including the truckside stuff?)
    3. convert to something other than fisher SEHP (use the blade/frame/mount with some other setup). No idea what this would cost or what is involved or what the options are.

    I am also keeping an eye out for used parts to lessen the pain. Opinions / advice? Rebuild or replace?

    Tom
     
  2. foxt

    foxt Junior Member
    Messages: 5

    Got a chance to disassemble everything today, but didn't have a chance to bench test anything. After scraping off the melted remnants of what's left of the valve assembly cover, I pulled apart the cartridge valves and coils. Valves still seem to freely move, and coils checked out with an ohm meter, so tomorrow I'll play with a 12v supply and see what I've got.
     
  3. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Fox, since it only got hot enough to deform the plastic valve cover I wouldn't hesitate to reseal it and use it again. Aluminum dissipates heat fast so I doubt it got hot enough to distort or damage it beyond rebuild capability.

    Your checking the correct things so far....and in addition be sure to replace EVERY seal and O-ring and it should provide you years of dependable service.
     
  4. foxt

    foxt Junior Member
    Messages: 5

    Thanks for the reply B&B. Had a chance to bench test the valves and the motor, all seem to operate. I think you're right, should be able to get away with changing seals/fluid.

    Now I need to deal with finding replacements for the truck and plow side harnesses, lights, and the joystick. Since I am starting over, do I try to find a relay system or the newer solid state control system? I need a source for used parts. Heck, can I just build a replacement for the relay system myself?
     
  5. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    What make/model is the truck that this plow is on/going on Tom?
     
  6. foxt

    foxt Junior Member
    Messages: 5

    '95 Dodge 2500
     
  7. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    You could do any of your options you mentioned Tom. If you look around you should be able to find an older relay harness new...this would be the least expensive route.

    You could make a new harness from scratch but until you bought the correct connectors and used your time to hand build it it would cost more that a new replacement relay style harness.

    New style Iso style harness setup would also be an option, but of course it would be the most expensive route to take.
     
  8. foxt

    foxt Junior Member
    Messages: 5

    Thanks for the reply. Been looking around for the parts, but was wondering if there are other guys besides what google finds (CPW, stuff4trucks, mills supply, etc) that I should check? Is there some other obvious go-to vendor to try, or is CPW the answer?
     
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    In addition to the ones you listed, Angelo's and Equipment Specialist are worth a look as well Tom.