Nasty hydraulic oil

I changed the fluid in transmission yesterday. The fluid came out yellow and nasty as seen in the attached picture. Everything seemed to work ok before the fluid change other than some jerky operation of the hydraulics at low engine rpm. After the fluid change, things seem to work much better. I plan to put a few hours on the tractor and change the fluid again. Y'all think I should do anything else?

mvphoto19106.jpg
 
(quoted from post at 13:11:13 04/12/15) yea I think you need a bigger drain pan. have fun moving that LOL. BTDT.

The fluid was so thick that it took forever to drain. A lot of it dripped out like caramel.
 
Obviously lots of water in the oil--run and change at least....To do it right-drop the
pump, disassemble and clean..Your call
 

I parked down hill when I drained it, so hopefully a lot of the sludge came out. I'll change it again in a week or so.
 
When I changed the oil in my tractor, I waited until I could break my truck patches,
then ordered them.

That was about as hot as I could ever get the transmission oil.

Drove the old tractor straight back to the barn and immediately drained the oil, it
appeared to drain well,
However, my oil did not look that color draining out.

Have heard of some running 5 gallons of kerosene through the system for five or ten
minutes. However, I do not think I would do that, no telling what might break loose and
stop up the hydraulic pump.

Agree with your theory, get her as hot as possible and change it out again. That is
about the best you can do, unless you do a tear down, complete cleaning and pump
rebuild.
 

I'd love to break it down and do it right but I need to get this tractor to work. I have to clear brush and build a driveway so I can get my shop and house built. One the shop is built I'm going to get my father in laws 8n running, then this one is getting a full rebuild.
 
I lived in Texas most of my life[45 years],and have drank my share of Lone Star,Shiner and others,but Bud was always my
favorite.
 
I had a similar problem,but not as nasty. I removed all the old stuff,rigged a parts washer for a catch pan with a hose
run to the transmission filler.I ran diesel through the tranny first,plugged it,then through the pump drain,where some
crud came out,then ran it through the small plug at the axle for several hours. It hasn't gotten dirty since.
 
Most tractors used in warm humid climates will get milky oil in the trans and rear end. Condensation forms in the cast iron cases during swings in temperature. The oil does not get hot enough to boil out the water so it mixes with the oil and settles to the bottom where it turns to sludge. I loosen the drain plug on my tractors every couple of months and drain any water.
 
I loosen the drain plug on my tractors every couple of months and drain any water.

Heck of a good idea JT.
 

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