2001 Grasshopper 725k

Discussion in 'Mechanic and Repair' started by Yard Slave, Apr 28, 2014.

  1. Yard Slave

    Yard Slave LawnSite Member
    Messages: 4


    I recently picked up a 2001 Grasshopper 725K with 500 hours on it. Should I flush the transmissions & change fluid & filters? I have seen people mention flushing the system. What does that entail? How do I do it?
    Thank you
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    No flushing required for general maintenance, Only when a pump or wheel motor fails and contaminates the system with metal shavings.

    Just drain the oil and change the filters.....

    Always fill new filter(s) with oil if possible before installing, Once the system is re-filled raise and block the drive wheels off the ground. Start the engine and run about 3/4 throttle, Move the controls full forward then full reverse slowly 10 to 12 times then re-check fluid level.

    Set the unit on the ground and test run. I use this method on all brand units with no problems.
  3. Yard Slave

    Yard Slave LawnSite Member
    Messages: 4

    Would you recommend an oil & filter change with 500 hours? Which oil would you recommend? Which filter? I am thinking of picking up another machine that I know has slow hydro's and would still appreciate info on how to flush a system.
    Thank you in advance!
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Yes, If these are Hydro Gear units they recommend 500 hrs and 20W50 engine oil. Any filter that's for your machine application will work, The only way I'd consider a machine with a weak hydro system is if it runs good (engine for something else) and is nearly given away.......
  5. Mowingman

    Mowingman LawnSite Platinum Member
    from Texas
    Messages: 4,721

    Hydros could be slow due to bad tension idlers on pump belts, bad pump belts, low oil level, plugged filters. However, you can dump a lot of money into these hydros if it is serious. Are you looking at a machine with the older Gemini (Eaton), hydros? If so, I would pass on that, unless it is nearly free, as Restrorob mentioned. Eatons are almost impossible to rebuild, super expensive to replace and some of those trans. are no longer available at all.

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