How to drain hydraulic oil

Discussion in 'Mechanic and Repair' started by PsRumors, Jul 12, 2005.

  1. PsRumors

    PsRumors LawnSite Member
    Posts: 64

    I bought an old Bunton (cheap and too see if I want one for the long haul) ZTR. It is a model BBMH20. For the life of me I can not find a drain for the hydraulic system. Do I just remove a hose? Do you then have to bleed air out? I don't have an owners manual, yet, but would like to get all the fluids changed.

    Here are some pics, maybe it matches up with another manufacturers system.

    Pump

    [​IMG]

    Wheel Motor

    [​IMG]

    Reservoir

    [​IMG]

    Any help would be greatly appreciated. Any time I buy something "new" I like to get the fluids changed ASAP.
     
  2. Redneckn

    Redneckn LawnSite Senior Member
    Posts: 294

    if there is a oil res. you may check that to see if it drains there.
     
  3. PsRumors

    PsRumors LawnSite Member
    Posts: 64

    There are two oil reservoirs right above the filters. One for each side. There are no drain plugs in them. I just had a brain hiccup and realize. The filters are right below the reservoir. You remove the filter and the oil is going to run out. I guess that is the drain.

    Once drained do these things need any type of air bleeding?
     
  4. Redneckn

    Redneckn LawnSite Senior Member
    Posts: 294

    I don't think i have ever messed with a bunton before. but i would guess by looking at your photos that it will need to have the air bled off. if you can get it to crank with the wheel up. AFTER you put new oil in, move the stix foreward for a few seconds, then backward for afew. do that a few times and it if it moving the wheels, that is a good thing. when you lower it back down, take it and do that same thing a few times and it should move any air on thru.

    the filter this appears to be the best way. after looking at the picture again, i see that too. never too late to have the obvious show up.hahaha.
     
  5. fixer67

    fixer67 LawnSite Silver Member
    Posts: 2,104

    YES, there is air bleeding. Here is a link to a thread I posted to before about this. As for dumping the fluid some pumps have drain pumps on the bottom of the pumps to help drain the fluid. Remember to use only the OEM recommend fluid. Using other fluid can cause you a lot of problems. Good luck

    http://www.lawnsite.com/showthread.php?t=77649&highlight=hydro
     

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