S80 Power Steering Fluid Flush

[trill2ride]

Hey Guys,

I have a 2000 Volvo S80 2.9 and its leaking from the reservoir and the hose connection. It has ATF in it right now (never been flushed) and I was thinking I should flush the system when I replace the reservoir and the hose.

Volvo says I should use ATF but I read that ATF causes leaks. I was thinking I should use Pentosin CHF 11S this time around. What do you guys think?

Also what is the best method to remove all ATF and replace with CHF11S? Several people just replace the fluid in the reservoir, drive for a while and replace again, but with this method there will still be some ATF in the system.

I read that it is bad to mix ATF and CHF 11S so I want to remove all ATF and replace with CHF11S.

Any input will be much appreciated. Thanks!

[matt5112]

If you look at BMW posts, there are people who are doing just fine on just ATF.

ATF is hydraulic fluid.

Different viscoscities, additives etc.

If you remove the return hose to the reservoir, put that in an empty container. Then either cap the return line nipple on the reservoir, or insert the feed tube into a bottle of new fluid.

[hovonogila]

I would not mix fluid types, or change the fluid type in this rack and pump. Follow the manufacturers recommendation. I just changed out the rack in a v70 (did not do the job myself).