Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Jd140 H3, Hydrostat Oil Foaming

hydrostat oil foaming transmission loss of forward power

  • Please log in to reply
7 replies to this topic

#1 andersonJD140H3 OFFLINE  

andersonJD140H3
  • New Member
  • Member No: 39836
  • 2 Thanks
  • 3 posts
  • Location: Tuscola IL

Posted July 05, 2013 - 12:26 PM

I started having problems after towing it across the yard with my truck after head gasket blew.  Being new to Garden tractors I didn't know there was a bypass vavle under the seat so I may have done some internal damage.  I have checked the bypass since and it is fully closed but the hydrostat oil foams up and starts pumping out the fill tube after about 10-15 minutes now.  Any assistance would be greatly appreciated, it appears to have a pre 15 series hydrostat in it.  Model 90-2052

 

I have not been able to locate any kind of service manual for this particular hydrostat.

 

 

Attached Thumbnails

  • IMG_20130704_203941_782.jpg
  • IMG_20130704_180610_156.jpg
  • IMG_20130704_203814_038.jpg

  • A.C.T. said thank you

#2 olcowhand ONLINE  

olcowhand

    Red Tractor Nut & Diesel Addict

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Sponsor
  • Contributor
  • Member No: 20
  • 35,605 Thanks
  • 29,834 posts
  • Location: South Central Kentucky

Posted July 05, 2013 - 01:21 PM

Go HERE for a Bush Hog JB Manual.  It has the identical hydro/diff unit, except control shaft is on top with the Bush Hog instead of out the bottom of the hydro pump.  It's a simplistic manual, but does have a schematic for the hydro unit.  Not sure why it would foam after pulling???

 Manual calls for type A trans fluid, but Dexron III works fine.  If oil looks milky, then likely just water contaminated & an oil change is due. 



#3 andersonJD140H3 OFFLINE  

andersonJD140H3
  • New Member
  • Member No: 39836
  • 2 Thanks
  • 3 posts
  • Location: Tuscola IL

Posted July 05, 2013 - 03:04 PM

Just drained it and the oil is milky looking.  Gonna fill her back up and try again.  Cross my fingers and see what happens.  Thanks for the suggestion and the manual link olcowhand. I'll post an update later tonight or tomorrow.


  • olcowhand said thank you

#4 andersonJD140H3 OFFLINE  

andersonJD140H3
  • New Member
  • Member No: 39836
  • 2 Thanks
  • 3 posts
  • Location: Tuscola IL

Posted July 05, 2013 - 07:41 PM

Filled it up with fresh ATF and it did the same thing again.  I also noticed a small leak coming from the pto shaft.  I wonder if there is a pickup tube that may have a crack in it or something.


Edited by andersonJD140H3, July 05, 2013 - 07:57 PM.


#5 JDBrian OFFLINE  

JDBrian

    Super Moderator

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2507
  • 9,574 Thanks
  • 14,136 posts
  • Location: Hubley, Nova Scotia - Canada

Posted July 05, 2013 - 07:48 PM

Check to see that you don't have a control valve stuck on float or stuck in the on position.  Did you measure the fluid going in because sometimes they will get air locked and appear full when they aren't. I'm just clutching at straws here. Is there a vent that could be blocked? I hope it's an easy fix. I don't think parts are as easy to find for those units as the newer style Dana rear end. 



#6 olcowhand ONLINE  

olcowhand

    Red Tractor Nut & Diesel Addict

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Sponsor
  • Contributor
  • Member No: 20
  • 35,605 Thanks
  • 29,834 posts
  • Location: South Central Kentucky

Posted July 05, 2013 - 08:50 PM

I've never had any type hydro foam & puke the oil, so I'm at a loss on this one.



#7 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted July 05, 2013 - 09:32 PM

Foaming usually comes from air going thru the pump. I think you have to have air getting to the pump somehow. Did you check all the fittings for tightness on all of the lines to and from the hydro?


  • twostep said thank you

#8 A.C.T. OFFLINE  

A.C.T.

    Another Classic Tractor

  • Senior Member
  • -GTt Supporter-
  • Member No: 11085
  • 2,363 Thanks
  • 2,496 posts
  • Location: Dalbo Minnesota

Posted July 08, 2013 - 01:30 AM

untitled welcome.png

 

Sorry to hear of your mishap. Hope everything works out ok. Would like to see more pics of the H3. I own a 1971.







Also tagged with one or more of these keywords: hydrostat, oil foaming, transmission, loss of forward power

Top