Hydro Problem... Help Guys, I need some guidence!!

Discussion in 'Mechanic and Repair' started by intrigue12, May 27, 2010.

  1. intrigue12

    intrigue12 LawnSite Member
    Messages: 93

    Hello, Everyone. I have a great dane super surfer series II with about 850 Hours. Probably for the last hundred hours or so I have been dealing with a funny right side hydro. At the start it pulsates, vibrates, kinda makes a grinding sound and is jumpy. I also have to give it more forward pressure to keep up with the left side at the start. It just seems to not have the power it used to have. Also the reverse is also weak on the right side as well.

    I checked all the adjustments and they are fine. Also the fluid looks clean but has never been changed. I always just top it off when it needed it a couple times.

    After a going a couple feet forward it catches up then has as much power as the left side. I have been going crazy trying to figure this out. I put a new belt on also thinking that maybe the belt was bad. Also I tighted up the tensioner but it didnt seem to help. The pulsating and vibrations are especially noticeable when going up a hill or cutting across a hill with the bad hydro side on the bottom.

    If you guys have any ideas please let me know.
  2. Shoreline

    Shoreline LawnSite Member
    Messages: 55

    Sounds to me like an internal issue with the right side hydro pump.
  3. johnwon

    johnwon LawnSite Senior Member
    Messages: 299

    Hi, does your mower have two pumps or one shared pump? I have a friend with a Great Dane and it only has one pump being shared for both wheel motors.
  4. intrigue12

    intrigue12 LawnSite Member
    Messages: 93

    it has two seperate pumps..... Also while riding it is possible to see the hydrobelt. While riding and looking down I can see it moving forward and backward very fast. Almost like there is play in it. However the tensioner is really all the way tight
  5. ricky86

    ricky86 LawnSite Silver Member
    Messages: 2,135

    Get an extendable magnet, and check the bottom of the hydro tank for debris (metal particles). If you got debris, you got big problems.
  6. intrigue12

    intrigue12 LawnSite Member
    Messages: 93

    would debris is the tank mess with both pumps? Or would that mean that pieces of my right hydro are now in the tank? I have no idea about hydros thats why im asking.
  7. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,337

    Usually the fluid flows from the pumps to the hydro tank. The fluid in the tank goes to the filter, and then the filtered fluid goes to the pumps. If the filter gets clogged, the pumps will cavitate and get damaged.

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