Oil in hydraulics

[winston1]

Not saying it can't happen but has never happened with mine. Time will prove or disprove. If it continues to get milky you have something going on. Oil level going up any?

 

[Soundguy]

Had a similar situation with my engine oil. After my second spring time mowing I changed the oil and what came out was milky. This scared me good. Refilled it with fresh oil, ran it for 10 minutes and it was still milky.
I'm thinking head gasket. Sent it up to the dealer who checked it out from top to bottom, including a pressure test on the radiator. They found nothing wrong and wrote it off to condensation even though the tractor is kept indoors. I don't understand how moist air can get into a diesel engine.

oil is hygroscopic by nature.

when you shut the engine down and it cools, air is drawn in and as it continues to cool, water can condense and collect oil oily surfaces and then eventually pool and run down to he base of the sump, and if agitated, will emulsify.. some of it as a stable emulsion.. some not..

 

[Soundguy]

Not saying it can't happen but has never happened with mine. Time will prove or disprove. If it continues to get milky you have something going on. Oil level going up any?

and water level going down?

got a flap cap on the stack? there's usually some valve open in an engine..