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Old 08-01-2018, 03:04 PM   #15
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Oops mean helpful!!!
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Old 08-01-2018, 03:07 PM   #16
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Another rookie question. Is the air bag system part of the frieghtliner chassis?

Yes. Try leveling the coach again with the jacks and then hit the retract or store button. This will put the system back through the normal sequence and will possibly inflate the bags.
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Old 08-01-2018, 04:29 PM   #17
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Yes. Try leveling the coach again with the jacks and then hit the retract or store button. This will put the system back through the normal sequence and will possibly inflate the bags.


If that doesn’t work:

Run the coach on high idle.

Pump your brakes until your main and secondary tank gauges are below 90 psi.

Time to see how long it takes both gauges to reach back to 120 psi. You should hear the dryer purge.

The governor reads from the wet tank, not the main, and secondary tanks.
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Old 08-02-2018, 12:27 AM   #18
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Another rookie question. Is the air bag system part of the frieghtliner chassis?
Yes, it should be
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Old 08-02-2018, 07:43 AM   #19
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Have the coach weighed so you know how much air to run in the (front) tires. too much air can make the ride more harsh.
You may need new shocks too.
How old is coach and how many miles?

I don't understand the air shock comment. Does your dealer mean "air bags"? With a coach with air bag suspension you would want to have air pressure built up to 120 psi before taking off, the hiss he refers to may be the "air pop" when the air pressure reaches system cutoff pressure (120-130 psi) and the air dryer drain opens monentarily to dump any moisture.


Have the Leveling Valves checked too much air can be rough a slight move on setting can do alot
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Old 08-02-2018, 08:53 AM   #20
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Have the Leveling Valves checked too much air can be rough a slight move on setting can do alot
If you are referring to the "Ride Height" valves. It is unlikely that all three on a Freightliner would fail or go out of adjustment at the same time. If it rode fine before lowering it and leveling with the jacks, but rode rough afterwards, the problem most likely is related to the jack leveling system not reinflating the suspension air bags.
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Old 08-02-2018, 09:15 AM   #21
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check you tire pressure, make sure it is at what the coach manufacture recomends.
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Old 09-08-2018, 02:24 PM   #22
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"The dealer said..."

Well, that was possibly a mistake - finding this forum will be your redemption!
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Old 09-08-2018, 09:12 PM   #23
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I would bet your air bags are not inflated properly. Push to level and let the air out of the air bags. See how high the coach is. Strore the jacks. Start the engine and hit the store button again. Put thr engine on high idle using the cruise control. Watch to see if the coach raises from the level you had when the air was dumped for leveling. If the coach does not raise up, you have a problem. You also shoul hear a hiss when it is done, although you can hear the hiss even if the air bags do not raise the coach if the valve is not working correctly.
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Old 09-08-2018, 09:41 PM   #24
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Your air bags have a dump valve. Often it can get stuck or partially hung up. Air up. The turn everything off and go outside and listen for hissing sounds where your air bags are located.
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