hydraulic fan oil and filter

[timvasqz]

I think that is overkill. I bet caution is because the tank reservoir
is where the expansion takes place and the cold oil airspace leaves
room for condensation. when you mix water with the hydrolic oil you get
a foam. the foam air can pack airpressure in the lines and screw with
the pump and rams. (the steering gets spongy) the fan pump and oil also
runs the steering on the pt's.--- In
WanderlodgeForum@yahoogroups.com, "maureyroad" wrote:
>
> Why should the hydraulic fan oil be changed every six months as
> directed by the owner's manual? Thanks
>
> Dan Williams
> 88WB38
> Jackson, MS
>