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Plow goes left and right but struggles to go up.

Discussion in 'Truck & Equipment Repair' started by gtmustang00, Sep 4, 2013.

  1. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    I have a plow that goes left and right ok. Goes up fine til the slack is out of the chain then it won't lift the plow up. Any suggestions? I have to buy a new resoivor as it's rusted. We thought it was just low on fluid but that wasn't it. Any suggestions?
     
  2. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,526

    possible weak pump but flying blind without pressure gauge.
     
  3. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    I would hate for it to be the pump. That's 300 bucks! Where do i connect a gauge?
     
  4. leigh

    leigh PlowSite.com Addict
    from CT
    Messages: 1,997

    Mine did that when the quill was out of adjustment.MM2 Sounded like it was trying to lift a house! Turned left and right just fine, struggled on the way up and would go halfway up.
     
    Last edited: Sep 5, 2013
  5. brad96z28

    brad96z28 PlowSite.com Addict
    Messages: 1,526

  6. leigh

    leigh PlowSite.com Addict
    from CT
    Messages: 1,997

    Just realized you didn't mention which brand plow?
     
  7. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Fisher mm2 7'6. After i put the new reservoir on i'm going to turn screws in and 1 turn out (what donovan's told me). If that's not it they will test the pump for me.
     
  8. rjigto4oje

    rjigto4oje PlowSite.com Addict
    Messages: 1,296

    make sure the pump filter is not clogged the pressure should be 1500 to 1800 look online at Western plow website also the motor may be weak
     
  9. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Filter was not clogged. Adjusting the screws had no effect. Having the pump tested tomorrow.
     
    Last edited: Sep 5, 2013
  10. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,691

    What condition is lift cylinder in? Has anyone tried to adjust, replace or tighten the gland nut?
     
  11. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Lift cylinder is in good shape. No leaks.
     
  12. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,691

    Have you checked S3 valve for debris?
     
  13. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Did my threah get moved? I thought i posted it in the Fisher section as it's about a Fisher plow.

    Anyways 600psi on the pump! Bought a new one. Hope to install tonight.
     
  14. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,691

    Hope it fixes it for ya. Thumbs Up
     
  15. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Like brand new now!