Does anyone have the procedure and the fluid capacity?

I did our old 740 PS at the rack. As I recall, I jacked the car so both front wheels hung loose. Partly removed the bolt thru the banjo fitting on the return line (soft hose) until fluid was draining. I didn't start the engine as I remember. My dad moved the steering wheel rack to rack and topped off the pump. Repeated about 3 times until fluid was bright red. It's a mess and requires jacking the car and putting on jack stands. I did our 850 via the tried and true turkey baster method as Klaus recommends. For added protection, install a magnafine filter in the return line (the soft line) and you'll be set. Just make sure you install it with the fluid flow in the right direction.

bl

We did start the engine to flush the rack which about requires two people. With the wheels hanging free, we started the engine, I loosened the banjo fitting until fluid started to drain. Dad moved the steering wheel lock to lock after which I tightned the bolt. He topped off the PS fluid and we repeated about 4 times. However the turkey baster technique is about as good and not nearly the hassel. Potential problems by draing the rack include getting air in the system and or running the pump low on fluid

bl

.85 quart of ATF is all there is. There is no "flush" like the tranny, you will have to pump out what you can, refill it with fresh ATF, run the steering through a few turns, and do it again. Once the fluid is nice and pink, you are done.

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

Hi Klaus, going back to my 940 days, I think we had a procedure that actuall got the fluid out of the rack by cracking the wheel left and right and adding fresh fluid. Can't do the same somehow on the 855?

Probably too late, but, check this:

http://www.matthewsvolvosite.com/chat/phpBB2/viewtopic.php?t=8644

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

This is the same procedure. Like brake lines, air in the steering system would be dangerous, and there are no bleeder nipples for PS.

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

It is pretty easy to get the air out.

Park the car with its front on a stack of 3 or 4 pieces of cardboard (so that they turn easier) and turn the wheels fully to each side several times. That will get most of the air out, the rest will come out by itself.

Although I admit that I drove slowly across an empty parking lot turning the wheels fully to both sides to be sure after I installed a rebuilt rack on out '90 744 TI.
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'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 415,000 miles put on 9 bricks

When you say ' pump out what you can" how do you do that?

Cheap turkey baseter? Mighty Mac vacuum pump?

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

Procedure: Pull out what's in the resevior, start car, turn left, turn right, turn off, pull out again from resevior and repeat a couple more time?

Never run the steering pump without the reservior filled!

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

Seems like we'd want to dump the return to the reservoir into a container and keep loading fresh into the reservoir..... Are we saying we can't remove the return?

I have been advised that the fluid pumps out faster than you can pour it in. That also takes 2 people, and getting the hose off and back on without subjecting it to leakage is risky.
Seldom is the PS fluid so bad that you need to replace it completely. A half quart will refresh 75%.

Klaus
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1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi

I've never found the 850's to ever really need a ps flush but if you were going to do it just do it like you would do a red engine car. Crack the PS return line loose down at the rack, place a drain pan underneath of it, start the car up and pour in fresh fluid as it barfs out the old fluid into the pan. Run a quart or two through it and it should be good to go. Running the power steering pump without fluid in it is not the best thing you can do for it but it is not catastrophic. I cannot tell you how many leaky systems I have repaired and not replaced pumps on them. If you remove the return line entirely it will probably barrel the fluid out faster than you can pour it in so a little trial and error maybe called for here. If the fluid is not pump out into the bucket fast enough the loosen the line a little.

Mark

On the Rack, which one is the Return line?

The return line is the tube which goes into the bottom righ hand side of the reservoir.

I have replaced my rack twice due to leaks and I recommend a "flush and a filter" to avoid doing that 'orrible job again.
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Tek

http://www.brickboard.com/RWD/index.htm?id=576783