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Old 07-11-2015, 11:52 PM   #1
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Winnebago Owners Club
Join Date: May 2014
Location: Bridge City Texas
Posts: 212
diffrent pressure readings on front & rear air tanks

Both gauges used to read 125 psi but about 1/2 way thru our trip to Moab the rear started reading about 15 psi less. When the compressor kicks in the both reach 125 psi but as soon as I touch the brakes the rear drops about 15 lbs. and stays there. I crawled under the edge of the rig and can't find any air leaks. There is negligible air loss over night. So what gives? any one ever had this happen? I have a Spartin chassis.

Mike, Stacy,Preston. Dutch & Artie, our German Short Haired Pointers
2018-27PE Winnebago Vista , 2015 Jeep Wrangler toad

10/18/19 Dutch has passed but still with us in our hearts :(
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Old 07-12-2015, 12:11 AM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
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Your air brakes should operate , front; off of one tank, rear : off the other.
Air suspension, and other air operated accessories, ( horns, exhaust brake) , run off one tank .
The air suspension , during it's operation in keeping the coach level in corners could easily deplete the one tank by 15 psi, before the compressor cycles to re-build the pressure.

Getting an air-system diagram for your chassis from Spartan , would be the first step. To find out what systems are operated off the tank in question.
Spartan Motor Home Support
Have your serial number handy.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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