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Old 08-16-2019, 09:22 AM   #1
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02 Kountry Star air brake problems

Went out to start and check the MH out this morning and the Low Air warning will not go off. Front air gauge works like it is suppose to but the back gauge goes to full as soon as I turn the key on. What do I need to look at sure check for this. There are no air leakage that I can hear when I shut it off and go around the outside. The back gauge has done this a couple of times but then it has went to working. Any advice is greatly appreciated. TIA
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Old 08-16-2019, 09:48 AM   #2
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Freightliner chassis ?
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Old 08-16-2019, 10:18 AM   #3
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Yes. Sorry I didn't list it. It is a Freightliner chassis.
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Old 08-16-2019, 10:28 AM   #4
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Your 02 F/L will probably need the repair listed in these pdfs.
Attached Files
File Type: pdf Freightliner gauges operation , testing.pdf (127.9 KB, 19 views)
File Type: pdf Freightliner VDC_Repair FL VDU (1).pdf (235.5 KB, 12 views)
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Old 08-16-2019, 11:32 AM   #5
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Locate your VDU , probably in the engine compartment and make sure the two wiring plugs are tight and and wiggle the airline connections to see if that might silence your warnings.
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Old 08-16-2019, 12:33 PM   #6
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Buzzers?

Will the buzzer stay on if you have the levelers down ? Will my air gauges read incorrect if the tanks have moister in them ?
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Old 08-16-2019, 12:35 PM   #7
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Will the buzzer keep going if it is running ?
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Old 08-16-2019, 03:18 PM   #8
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I don’t think moisture would have any affect on the pressure transducer which is part of the VDU (vehicle data unit). When your coach was produced Freightliner got some VDU units that had some bad soldered joints that have caused some of the symptoms you posted.
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