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E47 pump won't work

Discussion in 'Truck & Equipment Repair' started by rpmroger, Dec 8, 2010.

  1. rpmroger

    rpmroger Junior Member
    Messages: 1

    I inherited a 1979 3/4 ton plow truck with a Meyer plow. It has an E47 pump on it. I took the pump off the vehicle into the garage and changed fluid in the pump with regular plow fluid. The pump did not have a drain plug so had to turn over and let the old fluid glunk out. I do not know if the pump worked before I started. I hooked a battery to it and the pump will not go up. It spins very rapidly but nothing. I assumed that none of the solinoids needed to be hooked up for the ram to go up. Am I correct on this??? Also all of the solinoids have a magnetic pull to them when electricity is applied. Where would I investigate first if the ram will not go up. Could the pump be air locked since I changed fluids or should I look elsewhere?
  2. HEStufrthnnails

    HEStufrthnnails Senior Member
    Messages: 354

    Hey RPMroger.It' s been awhile since I plowed with a47, so I would head over to the Meyer thread there'll be someone who can help ya.
  3. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    You need to apply power to the B coil/valve (red wire) for the lift ram to extend. If it still doesn't then the valve is likely stuck. You can attempt removing it and stroking it manually with a small screwdriver in the end but if the pump has had no activity or maintenance in a long time you'll likely discover it will need most or all of the valves replaced to be reliable.
  4. festerw

    festerw Senior Member
    Messages: 986

    power straight to the motor won't make it raise. Check out the Meyer website they've got a great troubleshooting guide.
  5. purpleranger519

    purpleranger519 Senior Member
    from Kansas
    Messages: 536

    These guys give as good as a step by step as you'll find. Detailed pics and all.