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Old 04-28-2012, 09:11 AM   #11
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Originally Posted by Superchief View Post
Does it help if you empty the air "canisters" periodically. I think your suppose to do it monthly. If I had not gone to Freightliner Camp, I wouldn't know how or why to do this.
correct thing to do is purge tanks of moisture daily when driving .
I would say every time you stop to camp would be best .
And by drain I mean pull the cord till moisture is expelled .
any air newer system have dryers that work quite well but it never hurts to check them if its easy .
BY the way these dryers need serviced once a year

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Old 04-28-2012, 01:35 PM   #12
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There are chords on the frame behind the front wheels- 2 on one side and 1 on the other (can't remember which right now). You should periodically pull the chords to bleed the tanks of any water that might have accumulated. Also, the air dryers need to have the dessicant cartridge changed every 3 years per Freightliner's maintenance schedule.

When I am going to leave the campground, after I retract the levelers and the air pressure has built up, I try to find a spot on something outside (a near by tree for example) and line it up with the bottom of the door window or something else in the coach. I then watch to make sure that the coach rises in relation to the spot I chose as the air bags fill. If it doesn't rise, I will hit the retract all again and watch the coach rise. This happens to me just about all the time so now I usually hit the retract all twice just as a matter of course.

Tom and Margaret
2014 Berkshire 390bh-60

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Old 04-28-2012, 02:24 PM   #13
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I have the same problem. It usually takes twice.
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Old 04-28-2012, 02:36 PM   #14
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I usually won't move the coach until I hear the whoosh that tells me everything is totally inflated and ready to move. That extra minute or so can save you a lot of time and even some money down the road.
2011 Berkshire 390bh
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Old 04-28-2012, 03:43 PM   #15
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Whoosh??? What whoosh??? I've never heard a whoosh..... Should I be hearing a whoosh???
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Old 04-28-2012, 06:21 PM   #16
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The whoosh, I believe is the pressure dump from the air system. It lets you know that the system has reached its upper limit threshold pressure. However, I think my system has reached that point without inflating the air bags. So, not sure that's a reliable indicator of air bag inflation.
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Old 04-29-2012, 09:24 AM   #17
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Cool Been there, Done that

The Woooooosh that you are hearing is the air dryer discharging. Your air pressure should be about 135 psi then the d2 governor will signal that your tank are up to pressure and the dryer will eject any moisture from the system. This is the same air system that is used on class 8 tractors. If all else fails and you can't get your coach up, There is an override button on the dump valve under the frame. It requires you to get under the coach but if all else goes south, it will get you back on the road !!!!!
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Old 04-29-2012, 10:16 AM   #18
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Your thinking we can fit under there with the air bags empty? I need to start dieting now. :-)

Finally completed all State visits in August 2011 with a trip to North Dakota.
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Old 05-05-2012, 07:40 AM   #19
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Air pressure

Had the same experience my first time out. Be sure before you retract jacks that your air pressure is above 75 on your two gauges. Air pressure will eventually build up but ride is very hard and you get bounced around.
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Old 05-13-2012, 11:13 AM   #20
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I had this also, so what I have figured out is depending on the sequence of retracting your jacks, it may take a long time to air up the suspension, so since I now crank up, let the pressure build up to over 100(the bar between 75 and 150), then retract the jacks, all is well. Otherwise takes a while and the suspension only airs up after the brake system is up, takes a while if driving, which can't be good for it!

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