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Hydraulic Oil Change 2011 Super Z

Discussion in 'Hustler Turf Equip (Archived)' started by Po3, May 8, 2013.

  1. Po3

    Po3 LawnSite Member
    from VA USA
    Posts: 13

    Okay, so I meant to change the hydraulic oil at the recommended 50-hr mark, but slid it out to the 62-hr mark. Looked fine when changed, bluish green color, saw a few "copper looking" metal flakes, but fairly clean. Installed OEM filter ($$), filled with Mobil-1 15W-50 motor oil, used approximately 10-qts. I might need to add a bit more, but not much, it is close to the estimated 1-in from the top level. If the tank itself holds 3-gallons (12-qts), the hydraulic oil filter evidently displaces 2-qts of that total? So it seems too that the oil in the wheel motors and maybe the aluminum air shuttle cooler may still be the original oil, meaning I have some standard oil mixed with mostly synthetic oil. I guess this okay, but concerns me a bit as I am not sure how much of the old oil remains in the system. I also started it and let it run at 2/3 power for a few minutes, then engaged the drive, and it sounded "dry", but settled to it's normal whine after a few turns, forward and reverse maneuvers. Since it seemed fine, I mowed for 2-hrs after this change without issue. While some noted a marked decrease in whine after the first change, my hydraulic whine seems about the same as before. Did I do this right or no?
  2. Sharpcut 1

    Sharpcut 1 LawnSite Senior Member
    Posts: 450

    You should be OK. You should of jacked it up and ran it with the rear wheel off the ground for about 5 minutes to purge the air out of it, but it should be out by now. Super Z pumps do have a bit of a whine to them constantly. If you don't purge the system, you stand to create an air lock in one or both pumps, which would'nt be good!
  3. Po3

    Po3 LawnSite Member
    from VA USA
    Posts: 13

    Is the air purged by running the drive mechanism while jacked up with the rear wheels off the ground? I thought about doing this, as I had the rear jacked up to change the Hydraulic oil, but decided against it, I guess I should have gone with initial instincts. Next time! Thanks for the information!

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