Power steering fluid flush?
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Mountain Pass
Joined: Jan 2008
Posts: 193
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Power steering fluid flush?
Seems like a lot of people complain of their power steering pumps/racks going up on aerostars. I hear mine whining too, not necessarily in a bad way, but it made me think there might be value to flushing out the 11 year old fluid. Anyone else do this? Sound like a good idea? I was thinking I could take a turkey baster and suck out most of the old fluid out of the filler and then drain the rest out of the various lines connecting to the rack (manually turning the front wheels all the way in both directions to help pump out the old stuff trapped in the cylinders). Then tighten every thing up and refill with a good synthetic. What do you guys think? Anyone else already done this? Never heard of anyone flushing PS fluid so not sure if it's a dumb idea or not.
Elder User
Joined: Apr 2005
Posts: 882
Likes: 0
From: Wichita
Just cut the return line. I used one of their standard transmission filters
Magnefine--Magnefine Filter Installation Instructions
Magnefine--Magnefine Filter Installation Instructions
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
search the aero forum for ps system flush.
use a quality synthetic ATF Mercon such as Mobil1
put front end on jack stands
pull the ps return line off off reservoir, into drain, run engine and turn steering wheel back and forth while adding ATF. turn engine on and off to pump out and refill.
repeat until clean ATF comes out.
use a quality synthetic ATF Mercon such as Mobil1
put front end on jack stands
pull the ps return line off off reservoir, into drain, run engine and turn steering wheel back and forth while adding ATF. turn engine on and off to pump out and refill.
repeat until clean ATF comes out.
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Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
I think I'll get one of those as well. I need to change my fluid again, it has gotten water in it. I'll go with a good synthetic ATF. The source of the water getting in has been resolved too.
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Elder User
Joined: Dec 2006
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From: Kitchener,Ontario,Canada
Aeroman.
P.S. The whine you can hear is normal for a Ford Aerostar pump. It is related to engine speed & pump load, it goes away when engine revs increase above about 1.5-2k Revs.
Elder User
Joined: Apr 2005
Posts: 882
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From: Wichita
I asked the vendor about this before I ordered mine. They have a bypass so the won't block up. Still, you need to change them.
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Mountain Pass
Joined: Jan 2008
Posts: 193
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Thanks everyone, this site is fantastic. Tons of great info that makes me feel confident I can keep my cherrystar going for a zilliion miles. So I should use ATF, and Mercon V type synthetic would be best? How much will I need for a full flush/replacement? Also when I go to cut the return line and insert the filter, is the line steel reinforced or is it just nylon reinforced so I can cut it pretty easily with a razor?
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