Hydraulic fluid full of bubbles

This topic has 15 replies, 4 voices, and was last updated 9 years, 7 months ago by pedavies.

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- November 26, 2014 at 5:28 pm #37353
  DavidPrivett
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  make sure you have the correct fluid in the tractor some will foam up
- November 26, 2014 at 8:02 pm #37354
  pedavies
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  Running with AW 32. Patience seems to be the key, start it and walk away for a half hour, don't move it or use any hydraulics, just let it warm up.
  
  Paul
- November 27, 2014 at 8:57 am #37357
  DavidPrivett
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  almost makes me think that you have something causing excess turbulence (maybe a restriction) .as the oil thins it reduces its effect. but that it just a wild ass guess at best.
- September 25, 2015 at 1:46 pm #38087
  pedavies
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  Has gotten worse, happens while warming up now. Will take the line off between pump and reservoir and see if there may be anything restricting the flow. Filter is 140 micron (NAPA 1614). Pump isn't making any strange noises and once warmed up everything is working normal.
  
  Paul
- September 26, 2015 at 7:30 pm #38088
  DavidPrivett
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  if your tractors pump is internal I guess there is a chance of a suction side leak in the case. ,you would never see it. But I think most Chinese tractors have external hydro pumps. I guess that you should see a leak somewhere after the tractor is turned off if there was a suction side leak that was the cause of the bubbles in the oil. I am wondering if maybe the oil is to blame maybe it does not have the anti foaming agents it should or a bit of water might do it.
- September 26, 2015 at 11:15 pm #38089
  Tinbender
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  Wonder if it's a stuck check valve in the filter or filter housing? Quite a few years ago there was a run of these tractors with defective plastic check valves in the filter housing that would crack and cause problems. With 1,000 hours on yours maybe something like that has happened?
- September 29, 2015 at 8:17 pm #38090
  pedavies
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  Put a new filter head on tonight. Will know if that did the trick when I start it tomorrow.
  
  Paul
- October 1, 2015 at 10:07 am #38095
  pedavies
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  Well so much for that idea, still foams up. Starts building up bubbles right away, then after about 5 minutes there are enough to come out the breather hole or right out the dipstick opening if it isn't in. After a few minutes of that it stops and the bubbles gradually disappear.
  
  Paul
- October 5, 2015 at 1:43 pm #38106
  pedavies
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  Somewhere in my house I have the engine manual for the tractor but I will have to widen my search to find it. Moving often doesn't help sometimes. I discovered the bolt in the center of the hydraulic pump mounting will not tighten so my guess is that the pump shaft is doing some wobbling or this is where air is getting in. a picture would be nice so the hunt for the manual will continue unless I find one searching this site. At least I found a problem and can head towards a fix.
  
  Paul
- October 6, 2015 at 4:59 pm #38108
  pedavies
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  Found the manuals but not much use for this area of the tractor. Took the pump and driver off. End of the driver was a bit rounded, just like the photo on Ranch Hand's site. Pump seems fine but am replacing it as I can not think of anything else at this point. Was good to see how the whole thing worked. Thanksgiving weekend in Canada this weekend so between new hydraulic pump, rad, hoses and thermostat, I have some work to do.
  
  Paul
- October 6, 2015 at 9:07 pm #38111
  Tinbender
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  Hmmmmm Turkey! Happy Thanksgiving !
- October 20, 2015 at 4:07 pm #38143
  pedavies
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  New pump didn't arrive for the weekend so I took the old one apart and cleaned everything up, put it back on and presto, no bubbles or foaming. Will keep the new one for a spare.
  
  Paul
- October 20, 2015 at 6:47 pm #38146
  DavidPrivett
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  so you took it apart and found nothing that caused your problem?
- October 21, 2015 at 11:37 am #38150
  Affordable
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  It had to be loose or something causing it to suck air, glad you got it going
  
  Tommy
  
  Affordable Tractor Sales
  
  “Your Jinma Parts Superstore”
  
  http://www.affordabletractorsalesco.om
- October 24, 2015 at 6:57 am #38163
  pedavies
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  Didn't find anything and the clean up with new gaskets must have done the trick. Parts tool box that came with the tractor had the gaskets in it.
  
  Paul
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