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Old 05-03-2013, 02:07 PM   #41
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Really imo which take it or leave it, if you have "air dryers" on your coach which most if not all of them do, you shouldn't have to drain your tanks ......

All you have to do is maintain your filter and heater.

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Old 05-03-2013, 02:10 PM   #42
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And for the discussion about home non portable air compressors they make a simple little gadget that automatically purges air from tank......
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Old 05-03-2013, 02:16 PM   #43
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i think the freightliner tech has overly simplified it... the wire loops used to drain the tanks release pressurized air as it drains the tanks as well. the fast air is going to blow any water into fine droplets that you may not be able to see with your eyes and in most cases, it won't land on the ground in drops. if you captured the exhaust from the tanks with a glass jar or similar, you will see that there is some moisture being expelled.
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Old 05-04-2013, 01:53 PM   #44
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I like your attitude. I hope to run out of money and be a burden to my children for a few years. They owe me. Ha. Really the best you can hope for is to die in your sleep (broke).

Absolutely. I'm working real hard on the broke part. I've already told my kids not to expect anything, because whatever might be left goes to Wounded Warrior Project and St Jude's in Memphis.

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Old 05-05-2013, 08:14 PM   #45
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No Tank Blowing Mechanism Evident

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i think the freightliner tech has overly simplified it... the wire loops used to drain the tanks release pressurized air as it drains the tanks as well...
I called Freightliner, and they gave me directions to find the wire loops. Looked carefully, and I don't have anything vaguely resembling that. Hopefully I have the automated drier system. I guess they'll show me in June 2013 at the Camp Freightliner course or at the maintenance shop down the road when I have my first service appointment in Gaffney, but my chassis was built in March 2012, and the tanks have never been blown.
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Old 05-06-2013, 01:26 AM   #46
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I just had to take my 2011 Berkshire in for service on the air dryers. Lost air when pulling into camp and had to call for service to get going. At Freightliner in Jerome Id. They replaced the purge valve. I was told when in cold weather pull lines each week to remove moisture and prevent freezing. Under normal weather to pull once a month. Will do that it looked easy. Better safe than sorry when out of warrenty. Also had problems with coolant leaking...had to replace clamps in the front of the coach. Coolant was leaking on the generator.. Hopefully all is well now.. Very nice service department. Recommend them. In and out in 2 1/2 hours. Purge valve under warrenty, coolant clamp replacement and testing..replacing coolant $68.00. Fair price I thought...
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Old 05-06-2013, 01:57 AM   #47
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I called Freightliner, and they gave me directions to find the wire loops. Looked carefully, and I don't have anything vaguely resembling that. Hopefully I have the automated drier system. I guess they'll show me in June 2013 at the Camp Freightliner course or at the maintenance shop down the road when I have my first service appointment in Gaffney, but my chassis was built in March 2012, and the tanks have never been blown.
front wheel wells... look on the frame for a wire look that looks like this:



after parking and shutting the engine off, pull the loop till air stops coming out.
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Old 05-06-2013, 09:06 AM   #48
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I found three loops. One behind drivers side front wheel and two behind curb side front wheel. Is that all of them? Also is it ok to do this anytime when parked regardless of whether leveling jacks are down? And is it safe to start the motor when parked and leveled with jacks down if air pressure in the tanks is needed to be built up to use the front air fitting to inflate car tires or water toys, etc?
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Old 05-06-2013, 11:51 AM   #49
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Air Blowdown

Himcules: Thanks for the pix on the wire loop location - worth 10K words, as they say! I haven't looked yet, but I'm sure I'll find them now. BTW, Freightliner says that the bag pressure is independent of the tank pressure, so the coach will not settle while the air system is being blown (and you are "under the bus", as they say).

Mjracsj: Fill all those toys and your tires too, with the jacks down. In fact, you are supposed to start the engine and allow the air pressure in the bags to fill before retracting the jacks, otherwise the coach will settle down on the empty bags with the engine off. Then, when you start up, you will hear a popping noise as the empty bags inflate from a "squashed down" position. This is not good for them - it will cause an undue amount of wear or possible damage; however, we've all done this once or twice.

You cannot deploy (lower) the jacks, or auto-level with the ignition ON - the system won't allow it. Also, while we're on the subject of jacks, do not move the jacks up or down while the slides are out, because the slides and their adjustments are less tolerant of the resulting, small amounts of torque (twisting) than the chassis frame is. I also NEVER TOUCH THE E-BRAKE OR GEAR SELECTOR until physically checking that I am completely unhooked, the jacks are UP, and I have carefully gone through the Freightliner checklist at the Driver Info Center EVERY TIME - NO EXCEPTIONS.

Happy motoring
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Old 05-06-2013, 12:15 PM   #50
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Originally Posted by mjracsj View Post
I found three loops. One behind drivers side front wheel and two behind curb side front wheel. Is that all of them? Also is it ok to do this anytime when parked regardless of whether leveling jacks are down? And is it safe to start the motor when parked and leveled with jacks down if air pressure in the tanks is needed to be built up to use the front air fitting to inflate car tires or water toys, etc?
yes, you have 3 tanks and those 3 loops are the releases of those tanks.

yes, you can clear the air tanks anytime the engine is off (jacks up or down). as stated by others, the air bag suspension is independent (with the exception that the leveling computer has access to them as well).

+1 to what Hallen01 said above.
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