Seafoam in Hydraulic System?

[fundytides]

I must have a bit of water in the hydraulic system on my 40 crawler. It was below freezing a few days ago and the hydraulics would not work. Yesterday the temp was above freezing and today the hydraulics work fine. I changed the fluid a year ago and didn't see any water at that time. I suspect there is just residual condensation in the system. Is Seafoam good for this and if so, how much?

[dtoots1]

Fundytides,
Yes definitely do use sea foam in your hydraulics....Believe that i put about 2 ounces in my jd440, which should be about same tank size as yours,
have 6 way blade on mine...It will certainly make difference...we supposed to get up to about 50 or 60 in next couple days so will help you as well....probly only need about 1 ounce, i watch it and add that when i see it changing a bit..

[fundytides]

Thanks dtoots1. I'll have to wait for the weekend for temps above freezing so I will do it then. I am putting the dozer in a heated building for the winter at that time as well so I won't have any more problem with freezing but will still use the Seafoam to alleviate the moisture problem. Several years ago when I was leaving the dozer outside all winter, I ended up with a cracked pump body. Don't want that to happen again!

[dtoots1]

i usually put some in the fuel tank as well as the engine oil...have also put some in the tranny fluid as it also gets condensation

[Ray III]

The oil has to be changed every year, trying to leave it in there just does not work. Deere actually wanted it changed every spring and fall. I also replaced my drain plug with an elbow and ball valve with the handle cut off. Now I can drop a socket down there with a long extension (to the nut on the ball valve handle) and drain the water off easily.‎