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Old 12-14-2015, 03:15 PM   #1
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Steering gearbox leak class A diesel pusher

On my last trip, I noticed the reservoir dropped about an inch on my 98 Beaver Ticonderoga. On parking at the end of the trip, I noticed a puddle of fluid which had come from the power steering gearbox under the drivers side of the coach. I have used engine degreaser to clean off the gearbox, and had the steering racked side to side, but am unable to see any signs of leakage. the casing is damp up near the top where the drive shaft from the steering column enters and where one of the fluid hoses attaches, but there is nothing obvious. I have used a flashlight and mirror, so had a pretty good look. I have it scheduled to go into the local freightliner service center in 2 days for them to get a look. Does anyone have any ideas before I start shelling out big bucks?

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Old 12-14-2015, 03:53 PM   #2
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Take a look a this site

TroubleShooting Tech Tips

there are several references as to what might cause a leak.

Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 12-16-2015, 06:15 PM   #3
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Here is what I have for a Ride Height Control Valve.
Here is a link to the Hadley site

You can find them listed on Ebay
Torque Air Height Leveling Control Valve Replaces Mack MAK20QE3126 H00450CE | eBay

I've never had one fail, there is also a link assembly that you can adjust, I do carry a spare of these.
Attached Files
File Type: pdf 1 Ride Height Control Valve.pdf (51.7 KB, 11 views)
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 12-22-2015, 01:03 PM   #4
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I once had a DP that would leak steering fluid only on cold startups. Some investigating determined that the leak was coming from the return line. When it was cold and I turned the steering wheel the high pressure line would force oil through the steering box, no problem. But pushing 40 feet of cold stiff oil through the return line, caused it to swell to the point of leaking just a little. Never lost enough to show in the oil level. Just enough mess up the driveway.
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leak, diesel, class a, steering

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