pictures of charge pump i've been having problems with

Discussion in 'Mechanic and Repair' started by grass disaster, Jul 7, 2007.

  1. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583

    follow link

    http://www.lawnsite.com/showthread.php?t=192448

    as you can see it's pretty pitted up.

    i ordered the charge pump for about $200.

    the boss on the face plate was a little pitted as well(pic a little blurry)
    i may try hone it with a stone lightly. they want $1600 for the whole face plate assembly.

    edited.JPG
     
  2. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583

  3. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583

  4. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583

    and another of the face plate the charge pump butts up against

    edited2.JPG
     
  5. tomo

    tomo LawnSite Senior Member
    Posts: 660

    hello,
    replace inner and outer gears .
    surface main casing with wet and dry [with a hard flat block]
    The removed casing could be machined depending on what bolts to it
    --the clearances to the outer and inner gears is very important

    As u r aware having a dedicated transmission is expensive ,particularly if not designed well eg the majority of Kubota ZD transmissions
    IMO fix this issue and trade machine 4 later unit or completely different brand
    Unfortunately the issues seem to strike zd owners randomly
    Good luck

    tomo:waving:
     
  6. Eric D

    Eric D LawnSite Senior Member
    Posts: 295

    Grass Disaster,

    Let me start with I have no experience with your model Kubota ZD. However, I do have many years of experience with gerotor pumps. From the looks of your photos it looks like you had some type of contaminant in the fluid or a major heat problem. If you end up rebuilding or replacing the pump, every line, hose, reservoir and any other components the fluid runs through will need to be flushed or the problem will come back in very short order.

    If you have the filter yet, I would suggest cutting it open and find out what is inside it. Some other component may have failed causing the particle to destroy the pump.

    Best of luck and keep us posted on what you find,

    Eric D
     
  7. razor1

    razor1 LawnSite Bronze Member
    Posts: 1,985

    "As u r aware having a dedicated transmission is expensive ,particularly if not designed well eg the majority of Kubota ZD transmissions
    IMO fix this issue and trade machine 4 later unit or completely different brand
    Unfortunately the issues seem to strike zd owners randomly" tomo


    The above is sad but true. I bought 2 ZD's at the same time. The one went bad while the other one is still going strong with about 2000+ hrs.

    grass disaster, I didn't realize you already started working on the trans. (if that's your Kubota in the pics?)
     
  8. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583


    yes those are my parts.

    i ordered a new charge pump with gears and housing it was about $200

    i am going to call the rep on monday
     
  9. grass disaster

    grass disaster LawnSite Silver Member
    Posts: 2,583

    yes it could possibly be machined if the face plate is easy to get off.

    i have access to a surface grinder i could possibly take it off and shave off a couple thousants of an inch. i believe the whole boss could be ground and the clearances would remain the same.
     
  10. tomo

    tomo LawnSite Senior Member
    Posts: 660

    hello, surface by hand the case with shaft sticking out ,unless u want to stip tranny totally .
    Housing with gears [photo] can be machined and sleeved as required .
    If the parts are seriously grooved it does indicate other issues in transmission and with out full strip down problem will reoccur :cry: .Full flush out and clean will be needed as other posters have mentioned
    I seriously do feel 4 you i almost purchased a zd28 pro ,i am happy i did not.
    Although my toro has a combined hydraulic set up this will be seperated after warranty is finished.

    Best of luck

    tomo:waving:
     

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