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-   -   HOW TO: Flush/change your tj's power steering fluid (http://www.wranglerforum.com/f210/how-to-flush-change-your-tjs-power-steering-fluid-23600.html)

4.0l sahara 11-30-2008 04:08 PM

HOW TO: Flush/change your tj's power steering fluid
 
Okay today i flushed my power steering fluid. Mine was the original fluid from 99 it was nasty and has about 112k miles on it.The ps fluid seems to be neglected on most vehicles. By changing it you can help extend the life of your pump and box.

The stuff you will need will be 2 quarts of ps fluid. Later tj's use ATF so check to see what you have. It can be synthetic or not. You will also need a catch pan/bucket,pair of pliers and i used a suction gun but it isn't needed.

http://i74.photobucket.com/albums/i2...n/DSC01154.jpg
http://i74.photobucket.com/albums/i2...n/DSC01153.jpg
http://i74.photobucket.com/albums/i2...n/DSC01152.jpg

Next pop the hood and remove the power steering cap.
http://i74.photobucket.com/albums/i2...n/DSC01155.jpg
Then i used a suction gun to suck out what was in the resivor.
http://i74.photobucket.com/albums/i2...n/DSC01159.jpg
There are two lines the high pressure feed line and the low pressur return.
we are only deeling with the reurn line. It runs from the box (the one i'm pinting to) to the back of the resivor.
http://i74.photobucket.com/albums/i2...n/DSC01151.jpg
http://i74.photobucket.com/albums/i2...n/DSC01147.jpg
Now we need to make somthing to plug up the hole on the resivor when we remove the line. I used a small pieace of hose and a wire nut.
http://i74.photobucket.com/albums/i2...n/DSC01162.jpg
Then use the pliers and slide the hose clamp back.
http://i74.photobucket.com/albums/i2...n/DSC01163.jpg
Then remove the hose and put the plug on the nipple of the resivor. The faster you are the less mess you will make.
http://i74.photobucket.com/albums/i2...n/DSC01164.jpg

next post

4.0l sahara 11-30-2008 04:18 PM

Then rout the return line down in front of the axle over your bucket.
http://i74.photobucket.com/albums/i2...n/DSC01166.jpg
Then top off the pump with new fluid.
http://i74.photobucket.com/albums/i2...n/DSC01168.jpg
Now you will need 2 people. Have one person sit in the jeep and start it while the other watches the fluid come out when the flow starts to slow or you start to hear the pump cavitate shut it off. Then top it off again and repeat. It will take 3 to 4 times and you will have nice clean fluid coming out of the hose.
http://i74.photobucket.com/albums/i2...n/DSC01169.jpg
Now put the hose and clamp back on the pump and fill the pump up to the fill mark. Start the jeep and cycle the wheel from lock to lock a few times to help purge all air. Check the level again and take it for a test drive. I would check it one more time after that. Then your all done.:D

Jerry Bransford 11-30-2008 04:35 PM

It was all great until you said to start the Jeep to cycle the steering back & forth to bleed the air out. The engine should not be started until the system is bled or the the pump vanes can be damaged from the resulting cavitation you may or may not be able to hear.

To bleed the air out, jack up the front end so the tires are off the ground and then cycle the steering fully back & forth 25-40 times, adding fresh PS fluid as needed. Then you can start the engine. :)

jpdocdave 11-30-2008 04:35 PM

nice right up, that is the most neglected fluid, next would be brake fluid.

just gotta make sure not to run that pump when the fluid is out, like you said.

4.0l sahara 11-30-2008 06:59 PM

Quote:

Originally Posted by Jerry Bransford (Post 287444)
It was all great until you said to start the Jeep to cycle the steering back & forth to bleed the air out. The engine should not be started until the system is bled or the the pump vanes can be damaged from the resulting cavitation you may or may not be able to hear.

To bleed the air out, jack up the front end so the tires are off the ground and then cycle the steering fully back & forth 25-40 times, adding fresh PS fluid as needed. Then you can start the engine. :)

Well i heard it cavitate once when i let it run 1 sec to long but i would think when you go to bleed it as long as the res is filled and you keep it filled while bleeding i would think it would be fine because any air will just come out the return and bubble up and not go in the pump. I heard no cavitation when i was bleeding.:)

Jerry Bransford 11-30-2008 07:04 PM

Regardless of what you think is ok, you should definitely not start the engine before you're finished bleeding the power steering system free of air bubbles. :)

4.0l sahara 11-30-2008 07:08 PM

Ok i'll have to remember that for next time. Thanks

dj_chizzle 12-01-2008 03:47 PM

nice write up, thanks

4.0l sahara 12-01-2008 04:05 PM

:DYa it isn't hard just a pain.

Weeeee 04-06-2009 08:51 AM

Any chance on getting the picture links fixed?

nater344 04-06-2009 09:00 AM

Good info....thanks! I believe that is the only fluid in my Jeep that hasn't been changed this year.

luckyAD80 02-03-2012 04:30 PM

Why are the pics not there? Bummer. I really need to do this before the sun goes down

CoyoteOn2 02-03-2012 06:54 PM

O/P most likely deleted them from, or closed out his Photo Bucket Account. OR the other reason they won't show up, is he moved them to another Folder in his P/B Account, which would render the Link invalid.
After 3 years, it's the most logical reason.
So it appears your left with "Flying by the Seat of YOUR PANTS, on this one."

Moxley_Sorrel 11-21-2012 08:37 PM

While Jerry Bransford may know a few things he is absolutely wrong in this case. The write up is correct as the MANUFACTURER recommends starting the engine and allowing it to run for a few seconds to purge the air. You want to fill the reservoir and then wait at least 2 minutes prior to starting your engine and letting it run for a few seconds to allow the air to escape then turning it off and rechecking the fluid level. Repeat until the fluid level is stable. Once the fluid level is stable then you raise the front wheels off the ground and cycle the wheel lock to lock at least 20 times. Afterwards lower the vehicle back to the ground before starting the engine once more to see if the fluid level is stable and there is no foam or milky appearance.

Nothing beats a good manual not even youtube

Jerry Bransford 11-22-2012 11:39 AM

You can of course do it that way, that is how the FSM (which I for several model year TJs) describes the procedure.

However, doing it that way also increases the odds of damage to the power steering pump impeller from cavitation from the presence of air bubbles present before the bleeding procedure is complete. Doing the procedure I described is a more conservative method which removes that potential because it will be bled before it is first operated. Do enough power steering work and you'll understand after hearing that screeching from cavitation by not having bled it before starting the engine.


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