Exmark (Pumps Power Loss)

Discussion in 'Mechanic and Repair' started by mustang1993, Jun 19, 2005.

  1. mustang1993

    mustang1993 LawnSite Member
    from South
    Messages: 4

    I have and Exmark Z. When the mower begins to warm up, the right rear wheel has almost no power. The left rear well work correctly. After cutting for an hour or so on hills and inclines, the left rear wheel looses some of it's power. They hydraulic tank cap has fluid around it, and on the tank. It can get so bad as to drip onto the exhaust, and cause it to smoke. I had a Lesco, and it did the same thing before buying the Exmark. I had take the mower to the dealer a year ago to have the loss of fluid looked at, and they said that was normal? I have tried the cap super tight, and snug. Still leaks!
    Has anyone had the same issue that can point me to a fix?

    Thanks for you input.
  2. Tech man

    Tech man LawnSite Member
    Messages: 55

    It sounds like the tank is over filled. The cap on that tank is vented, which is probley where all the oil is coming from.

    If you look inside the oil tank, after running the unit, does it look like it has alot of little air bubbles in it?
  3. mustang1993

    mustang1993 LawnSite Member
    from South
    Messages: 4

    According to the instructions on top of the tank, it said to fill up to the top of the baffle. That is what I have been doing. I have not yet opened the tank after running. I have normally been waiting till everything cools off. Thanks for responding.
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    I run all Dixie Choppers a 1/4" below the baffle,Seems to help with the spit-out around the cap.
    This little bit doesn't hurt a thing.
    Also check all return lines,If one is a little loose it may cause air to enter the system and foam the oil. A return line doesn't have to leak oil to cause a power loss to a pump.
  5. mustang1993

    mustang1993 LawnSite Member
    from South
    Messages: 4

    Thanks for the input. I will check the lines to make sure they are snug.
  6. vipermanz

    vipermanz LawnSite Bronze Member
    Messages: 1,773

    the fluid should be filled to the baffle line when the machine is hot, try the lines like rob said and see how that goes
  7. Expert Lawns

    Expert Lawns LawnSite Silver Member
    Messages: 2,660

    Good thread, I'm having the same exact problem. I just recently took some fluid out to bring the level down a bit. My machine seems to be losing power too. I went in and adjusted the levers on the pumps, but no help.
  8. jubiljoe

    jubiljoe LawnSite Member
    Messages: 10

    Yes, I agree air in the system would be the cause. I just ran into the problem but air was coming in the fitting for the pump. what I do every time I have a hydro problem is to a hydro flow test. this lets you check your pumps and lines. Hope this helps
  9. mustang1993

    mustang1993 LawnSite Member
    from South
    Messages: 4

    After talking to the dealer about the problem, they referred me to a few things that I should have checked! I just did not think about this for some reason, guess because I have going 24/7! lol

    The dealer instructed me to check the drive belt, and to make sure the grease fitting to the drive belt tension spring was lubed. Don't fry me for not referring to it in the correct name! It is the grease fitting that is under the seat. It keep the tension on the drive belt. He said that they are known to freeze up often if not kept lubed. He also echoed that the fluid level may just be to high. He said the fluid I see over spilling is normal under excessive filling. Who knew!

    I greased the fitting, and replaced the worn drive belt. Everything seems to be back to normal. What I think most of the problem was, was the worn drive belt. Because it was not generating the need revolutions on the pumps, they were getting under serviced. Again, this is something I should have checked. My fault! Good learning experience though.

    I was aslo having a "bucking" issue with the mower. The quadra shocks that give you resistance when steering were shot. They were $27 each. That fixed that issue as well. Thanks for your help again.

Share This Page