Catd6c

milky look is a sign of water mixed in the oil

Will normal condinsation cause this milky look?

have you been working in water? i had friends that got a d7g stuck in a creek, they recovered the following day but water was flowing around the transmission case and the final drives, one final drive was full of water, one final drive had no evidence of water and the transmission had some water ingression, enough to turn the oil milky, no damage as a result. if the breather is plugged, and you run it in water, the rapid cooling of the caseand the vapour within the case can cause a pressure drop and "suck water in past the shaft seals.

I just got this Dozer and learning about it. First the shifter was hard to find neutral. It goes from first to reserve too easy. Then I pulled the top trans cover off and saw the milky color and the top plate looked like elmers glue. I was told all fluids and filters were changed when I bought it. Haven't run over an hour.

Kind of sounds like the seller pulled one on you there...

Kind of sounds like the seller pulled one on you there...

I have also had this problem with moisture in the oil. Once it is in there it is hard to get out. A machine that is worked occasionally for short periods is particularly prone to this problem. If a machine it worked for long hours day after day any moisture will evaporate out. An occasional use machine will just get hot enough for the moisture to collect on the inside of the casing where it will eventually finish up back in the oil. Changing the oil does not all ways immediately solve the problem due to amounts of moisture laden oil remaining after draining oil. Filling the case with Kerosene and driving around for a while helps but may have to be repeated until what is drained comes out clean. Kero will mix with oil and water.
In an effort to save costs I have had some success with draining milky oil into a clean container and heating gently over a gas ring and simmering until golden brown. Here we pay around $100 for 20 litres of oil and with most tractors needing 40 or more litres of oil it is disappointing to change the oil and to re check later and find it a similar color as previously encountered. As the previous owner said he changed the fluids if the case was not washed properly this would be your problem. When you do get it right keep the tractor in a shed.
Just my thoughts on this.
Andrew K.

[quote="Andrew"]I have also had this problem with moisture in the oil. Once it is in there it is hard to get out. A machine that is worked occasionally for short periods is particularly prone to this problem. If a machine it worked for long hours day after day any moisture will evaporate out. An occasional use machine will just get hot enough for the moisture to collect on the inside of the casing where it will eventually finish up back in the oil. Changing the oil does not all ways immediately solve the problem due to amounts of moisture laden oil remaining after draining oil. Filling the case with Kerosene and driving around for a while helps but may have to be repeated until what is drained comes out clean. Kero will mix with oil and water.
In an effort to save costs I have had some success with draining milky oil into a clean container and heating gently over a gas ring and simmering until golden brown. Here we pay around $100 for 20 litres of oil and with most tractors needing 40 or more litres of oil it is disappointing to change the oil and to re check later and find it a similar color as previously encountered. As the previous owner said he changed the fluids if the case was not washed properly this would be your problem. When you do get it right keep the tractor in a shed.
Just my thoughts on this.
Andrew K.[/quote]


Thanks you for the info. So the best way to clean the tranny out is to drain fluid, fill with Kero and drive for a while... How long? Will this hurt the tranny? Then drain and refill with correct fluid. Thanks