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Old 11-21-2021, 04:35 PM   #1
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Air suspension Trouble

'04 Newmar Dutch Star DP
After storage for 3 months,, cranked up coach and rear air was slow to come up and alarm going off. Then next time, it came up to 65 mark on gauge, would leak down to 60 and alarm and then aired back up to 65. Next time all air is out in rear according to gauge. Front is good. Brakes are good jacks are good. Compressor is good. The air all came out of pipe shown in picture where there looks like a round hole that should have something in it. Above two white hoses. Any idea. Can't find help here in Atlanta. If it has to be towed, any idea how much for 60 miles?
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Old 11-22-2021, 06:19 AM   #2
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Have you called NIRVC in Lawrenceville?
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Old 11-22-2021, 09:31 PM   #3
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I have AAA so I can't help with the cost of a tow.

Have you taken the RV for a ride to see if it corrects itself? After sitting for a month, my rear suspension did not come all of the ways up to ride height for a few miles. Once it did, it was fine for the rest of the trip.

-B
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Old 11-23-2021, 04:19 AM   #4
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Is it a Spartan chassis? If so, reach out to them.
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Old 11-23-2021, 09:56 AM   #5
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My diesel mechanic told us the same thing about driving it and it would correct itself. And so did a repair shop. We did try that but only drove to gas station slowly and I understand the rpms have to get up around 1500. When we parked back at storage the air went down to to 60 and alarmed and then tried to come back up past 65. It would leak just a small amount and alarm and start back up again. Our son drives air suspension truck and warned us it could lock up and we would not be able to go forward or back up. Used the compressor to air up tires and air in rear dropped to zero and stayed there. Probably what messed it up. Generator would not crank and no power for portable air compressor so used the the RV one. It will not go anywhere now. Have a diesel roadside service on the way. Had to cancel our Thanksgiving vacation in Savannah. Hope it can be fixed on site and can make Mayport in January.
Thanks for wanting to help. Will let you know what happens.
Have PM from NIRVC and will be calling them if this mechanic can't fix.

Did contact Spartan but they could not help and was helpful in explaining to me an bout the system. Told us to have mechanic to call them if they need help.

I told my mechanic and RV repair shop both that I was stopping Giving out their name and number as it leaves no room for when we need work done. Mechanic is 3 months behind and repair shop will not work on anything older than 10 years due to shortage of mechanics. They said to call back if I didn't get help. Also Freightliner shop won't work on Spartan chassis. Learning a lot.

I will keep you all informed and thank you for the help.
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Old 11-23-2021, 10:01 AM   #6
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Air suspension

It did lock up. Was explained to me that the compressor couldn't put out as much as it was losing.Maybe if we hadn't depleted the tank and kept foot of the brake. It would not have locked up. I know if I hear the alarm we will stop as soon as we can and get help.
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Old 11-23-2021, 06:39 PM   #7
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With the amount of air you are losing, you should be able to hear where it is leaking.

I suspect the road side mechanic will find the issue. Motorhome chassis' are not that much different than a truck or bus chassis.

Good luck.
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Old 11-24-2021, 06:02 AM   #8
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Air suspension

Thanks Broke Down. We did find the leak and it was a lot so hard to miss. Took pictures and found mobile mechanic who came right out. It needs a leveling valve that he is looking for. He will be contacting Spartan for help. $125 an hour beats dealer prices. Just hope the part is available for '04 system. If so it should be ready after Thanksgiving. Just goes to show if you keep looking and trying, you can get help regardless of short handed dealers. Usually I find better mechanic, cheaper parts and learn a lot from this group here and from dealers willing to explain questions.
Will post the part cost if found and how long it takes to install it.
Thanks for response.
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Old 11-26-2021, 11:55 AM   #9
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I learned that system when my ride hight bracket broke.

Have him inspect the bracket that is mounted to the bottom of the air bag. It is the one that has the rod that goes to the valve that you are having replaced. The new bracket is a way better design. I found it online for $35 plus shipping.

On my 08, the ride height spec is 8.25 inches from the frame to the middle of the weld on the rear. You might check with spartan to be sure. It is a critical adjustment (+ or - 1/8). If it is out, it can put stress on the driveshaft.

-B
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Old 11-27-2021, 07:30 AM   #10
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Air suspension

Thanks Broke Down
Waiting for part. I certainly will tell him to check that. After all it was on concrete parking space for 3 months. What could make it break? Does it just go bad?
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Old 11-28-2021, 11:11 AM   #11
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Yes they can go bad just sitting. O-rings and other rubber parts dry out and shrink or crack over time, then a leak. I think at this point I have replaced all three height adjusters on mt 2003. Also mine has a mix of compression fittings and pushlock fittings. The pushlock depend on an O-ring so often have leaked over time. Might want to carefully inspect the airbags as well. I found a leak in one of my rear ones that was really puzzling. The rear was slow to reach ride height but once leveled seem fine. If I was in stop and go traffic the rear would drop, sometimes a lot. Found that at full pressure the crack would self seal and be fine but if the pressure dropped from using the brakes the crack would open and the compressor could not keep up at idle or low RPM.
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Old 11-28-2021, 11:15 AM   #12
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I would be quite surprised if there is anything "RV specific" about your ride height valve.


Very likely a parts house catering to the OTR trucks will have one in stock.


Just get the OE part manufacturer and PN off the old valve or get that info from Spartan. Spartan did NOT make the ride height valve.
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Old 11-29-2021, 09:38 AM   #13
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Air suspension

Thanks. Sounds like something I should let the mechanic handle.
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Old 11-29-2021, 10:19 AM   #14
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Quote:
Originally Posted by roadstar99 View Post
Thanks Broke Down
Waiting for part. I certainly will tell him to check that. After all it was on concrete parking space for 3 months. What could make it break? Does it just go bad?
Mine had a crack that went undetected. The original bracket was not well designed. They may need to pull the bracket off to see if it is cracked. It is held on by two bolts.
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