850 power steering fluid drain and fills.

Post by **rguzz** » 17 Aug 2022, 14:20

To my surprise my power steering fluid was dirty, smelled burnt, and had metal fragments in it. It was last flushed when rack and pinion was replaced, about 5 years ago. Pump has always been a bit noisy but most people haven't noticed or commented. I did a litre of drain and fills with Redline 75w only because I had it on the shelf, according to it's specs it's compatible. Anyway, I generally don't think of PS fluid as something that needs regular service but maybe now I will keep a closer eye on it. Volvo manual says IIRC no servicing required!

crlande · Post by **crlande** » 17 Aug 2022, 14:34

Have always done the turkey baster technique on the PS fluid until she looks good. Any fluid will need to get replaced in my view.

Post by **FireFox31** » 18 Aug 2022, 10:02

The flush procedure by MadeInJapan works very well. It's a very controlled process because the fluid only circulates when the wheel is being turned. I think I ran two liters through the system before the exiting fluid was nice and red.

Post by **manovlov** » 18 Aug 2022, 11:44

Brilliant !

Post by **FlyingVolvo** » 18 Aug 2022, 17:45

My 2 cents on PS system: Clean fluid is a must, and I've also had a Magnefine inline filter on the return hose for over ten years. 333K on original rack so far. Seems to work really well. Any hydraulic system should have a filter in my opinion. Otherwise it's just an exponentially aggravating cycle of wear. I have one on the trans return line as well.

Post by **rguzz** » 18 Aug 2022, 19:14

Refresh my memory on details, install, etc. Where did you put it, inline PS pump and transmission? Thanks.