BigMouse

Just wondering if anyone knows was type of seals are used in our Audis' power steering system. MIL-H-5606 fluid used in aircraft hydraulic systems is mineral based fluid that seems very similar to Pentosin, and is only $20 or so a gallon. 1/4 the price of Pentosin from the dealer. This fluid is compatible with the o-ring materials listed here: http://www.efunda.com/designstandards/oring/oring_chemical.cfm?SM=none&SC=MIL-H-5606

Can anybody confirm that this will work in our cars?<ul><li><a href="http://www.wicksaircraft.com/catalog/product_cat.php/subid=1561/">http://www.wicksaircraft.com/catalog/product_cat.php/subid=1561/</a</li></ul>

MikTip

Its used to "preserve" hydraulic components, until they can be placed in service. Normally we use Mil-H-83282, Type II. However its specificly designed for certain operating enviroments, and seals. Place it in your car, and it will eventually eat thru the seals...

20VT90q

The actual fluid for the hydraulics is usually red I think too?

MikTip

Yes, its a fire retardant...

BigMouse

Most military and all transport category planes use Skydrol which isn't flammable. 5606 is used in GA planes because it is cheaper, although flammable. I've serviced many oleos and brake systems on small Cessnas with 5606 per the manufacturer's instructions.

BigMouse

5606 is red.

MikTip

Try it in your powersteering...let us know how it do....

BigMouse

You've rebuilt this stuff before. Do you know what material the seals are made of in the rack?

20VT90q

I meen you just purchased a new rack. Why would you want to take the risk of ruining it? The pentosin to fill the system would probably be $5x, if you use the aviation stuff you would probably save $40 at the most? Now is that money worth it if you have to buy a new rack and other associated parts that will add up big time in the long run? In my and I think Miktip's opinion I think not... Just go with what you know works.

BigMouse

Don't worry, I'm not going to put it in there. Just thought I would bring up the thought of a sub.