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Old 09-30-2021, 02:12 PM   #1
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96 American Dream Spartan chassis power steering issue

This forum is amazing! It's helped us a lot, but we're currently in a difficult situation with the power steering on the coach. Pulled into Campground 3 days ago and power steering had been whining some but it got worse as we Pulled into theCampground, we researched this site and all our manuals, online..found that the hydraulic fluid and filter might be the problem. We had Spartan overnight the filter. (We're currently in Williams AZ, on the way to Quartzsite area to work). After replacing all that, we tested it this morning by taking several laps around the Campground. Still growling. The fan is working and accelerates when giving the coach fuel. So it's getting fluid.. not sure where the priority cartridge/valve is, or anything else to check other than power steering pump? We've been lucky to be able to extend our stay here but not sure what our next move should be. Seems like power steering pump? Is that doable if we can find one?
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Old 09-30-2021, 03:54 PM   #2
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I'm usually not a fan of additives but I have had good luck with Lucas power steering additive. It stops the whine. Depending on how large your hydraulic system is, it may take more than one bottle.

Your other alternative is to figure out if it's coming from the pump, or the steering box and rebuild it.
Best of luck!
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Old 09-30-2021, 05:59 PM   #3
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Thank you, I think we're going to try and clean the priority cartridge first and see what that does. Hadn't thought of additives.
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Old 09-30-2021, 06:03 PM   #4
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EDIT ...You were typing same time as me. Not sure the reason but at least one poster removed priority/proportioning valve and found debris hang it up.
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Old 09-30-2021, 06:08 PM   #5
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Old 09-30-2021, 06:51 PM   #6
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Good luck. Please take pictures and share your findings. Maybe it will help me one day!
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Old 09-30-2021, 07:55 PM   #7
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Not sure the pics below will PM sent, I have the plumbing diagram for steering/fan/priority valve.
The valve is mounted in the driver's side frame rail, just in front of the rear wheels

Attachment 344772Attachment 344773Attachment 344774Attachment 344775
Attached Files
File Type: pdf American Eagle Hydrolic Priority_block_inspection.pdf (1.04 MB, 53 views)
1999 American Eagle
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Old 10-01-2021, 09:37 PM   #8
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We found and removed both valves, cleaned, replaced one O ring on flo valve. Still squealing. Ordered rebuilt pump , no new ones available. Now trying to find information on how to remove and install new one, torque specs, etc.
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chassis, power, power steering pump, spartan, steering

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