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Old 10-19-2012, 06:34 PM   #1
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Tag axle air suspension

Can anyone tell me what air pressure they are running in the air suspension on the tag axle... the manual does not say what the limits should be... I bought my coach used (2011 HR Endeavor) it had 75lbs on the gauge. I have lowered it to 30lbs... but somewhere there must be a guide. I have read other manuals and it says MAX. Air for tag axle suspension not to exceed 25psi. Now this was a Newel Manual but it should be approx. the same... look forward to your comments... H.
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Old 10-19-2012, 07:11 PM   #2
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You really need to take your coach to the scales and see what weights you presently have on your steer, drive and tag axle. (best to weight with full fuel, probably 1/2 full water/grey/black tanks, propane (or determine size/weight) and what you normally carry with you....clothes, food, etc.) Go on the scales and then adjust the tag pressure according to you axle capacities. Remember that the more pressure you put on the tag, the more you will be adding to the steer. At the same time you will be taking some of the weight off of the drive axle. After you adjust the tag pressure, go through the scale again and re-adjust as necessary. You should have your axle capacities on a plate somewhere in your coach and/or in your manuals. It would be best to get the individual corner weights but that is not always possible. You can also use your weights to determine how much air pressure to carry in your tires. I usually have my tag pressure set between 38 and 42 depending on what weights I am running. (05 dynasty 42)
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Old 10-19-2012, 07:26 PM   #3
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[QUOTE=The Syb;1344661]Can anyone tell me what air pressure they are running in the air suspension on the tag axle... the manual does not say what the limits should be[QUOTE]
We've owned: 98 Sig, 99 Exec, 00 Sig, & 02 Sig - 40 psi give or take. Adjust it on the scale at a truck stop is an easy way to set it.
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Old 10-19-2012, 08:00 PM   #4
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I have an 08 Holiday Rambler Imperial, 45' with a tag. After many experiments with pressures, I found 40psi on the tag to be the best for me. To much pressure loads up the front end and unloads the drive axle. To little pressure takes out the load carrying capacity of the tag. Also along the same line, I run 85 psi in my tag tires. Hope this helps.
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Old 10-19-2012, 08:52 PM   #5
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Around 40 works for us too. If weighing...Monaco techs say to dump a little air after adjusting, then let it build back up and drive several hundred yards before a re-weigh. Easy task at a big weigh station on a Sunday afternoon when the trucks aren't running heavy. Or if you go into a FJ and tell them you ahd your tag worked on and that's all you want to weigh, then run through again they are usually good about it. Just a few $$
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