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3 wire converted mm1 moving slow...?

Discussion in 'Fisher Engineering Discussion' started by bryanlaprad, Jan 20, 2012.

  1. bryanlaprad

    bryanlaprad Junior Member
    Messages: 15

    hey guys. i just hooked up my plow today and it seems like its moving slow...theres no leaks or anything. is there an adjustment on the pump to make it move a little faster? it is an older plow and it could just be me comparing it to my boss's plow that i just had hooked to my truck the last storm...any input is appreciated!
     
  2. ChrisFromBoston

    ChrisFromBoston Junior Member
    Messages: 11

    How are the fluid and filter? A clogged filter will cause very slow operation.
     
  3. bryanlaprad

    bryanlaprad Junior Member
    Messages: 15

    the fluid level is fine and should be good...i replaced it in november....i never thought of the filter...
     
  4. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,239

    I would have to agree with chris seems like the suction filter might be plugged up is it SEHP pump or and insta act pump? SEHP pump has the lift piston with the pump.Insta act has its own piston with a hydraulic line running to the pump.
     
  5. bryanlaprad

    bryanlaprad Junior Member
    Messages: 15

    I thought it was the instant-act pump but from your description it sounds like its the sehp pump. I bought a filter kit and a few quarts of oil and will do it on tomorrows rain day. Thanks for the help. I will respond with the results
     
  6. bryanlaprad

    bryanlaprad Junior Member
    Messages: 15

    well i changed the fluid and cleaned out the reservoir....when i popped the reservoir off the pump, the old filter was laying in the bottom not attached to the suction tube.....i put the new filter on and put it back together. it seemed to be about the same....maybe time for an upgrade next season
     
  7. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    If it has a removable reservoir then it's an Insta-act unit. Running it with the filter off it may have picked up debris and run it through the valve screens. So the next thing I'd recommend is pulling the valves at least and cleaning them up. Then if it's still sluggish an amp draw test is next in line and then get a pressure gauge on it to check the gear pumps health.
     
  8. bryanlaprad

    bryanlaprad Junior Member
    Messages: 15

    stupid question but how do you clean up the valve screens.....? i feel dumb asking these questions but i dont know too much about these things...i know theres not much to them but i guess we all start somewhere...lol
     
    Last edited: Jan 23, 2012