hemsteadc Posted June 8, 2020 Author Report Share Posted June 8, 2020 One other nagging problem, the cab air bags are still deflating with the general drop is pressure over 24 hours. None of the other bags do that. Anyone know why? I'm trying to get an answer from Sportchassis but so far it's difficult. Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted June 8, 2020 Report Share Posted June 8, 2020 10 minutes ago, hemsteadc said: One other nagging problem, the cab air bags are still deflating with the general drop is pressure over 24 hours. None of the other bags do that. Anyone know why? I'm trying to get an answer from Sportchassis but so far it's difficult. Now we can narrow a smaller leak down. It's either upstream of the cab leveling valve, downstream, or the valve itself. Were it my truck, I'd remove the air line from the input to the leveling valve, and cap it. Pressurize the system and monitor. Gauge still drops, you have a leak upstream. Gauge holds? Reconnect the input, and cap the output. Pressurize, monitor. This will test the leveling valve, itself. If it passes, then the leak has to be somewhere on the bags. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
ms60ocb Posted June 8, 2020 Report Share Posted June 8, 2020 I betting you have an cab air leak or bad connection. I had a bad cab air bag leak when the truck was 4 years old. Freightliner dealer service dept couldn't fine it. The compressor would run every 5-7 minutes. ( That isn't the only problem I had with that dealer). Stopped the I don't remember the tank leak off time but it was only a hour or so . That is when I bought my Whisper device ,cheap insurance Clay M2-106 Sport Chassis Quote Clay & Marcie Too old to play in the snow Diesel pusher and previously 2 FW and small Class C Link to comment Share on other sites More sharing options...
hemsteadc Posted June 8, 2020 Author Report Share Posted June 8, 2020 (edited) Thanks. How many mechanics does it take to find air leaks on a Freightliner chassis? All of them, but nobody can fix them. According to SC, Freightliner's spec on acceptable air loss is total loss in 6 hours. I don't know, that seems excessive. Edited June 8, 2020 by hemsteadc Quote Link to comment Share on other sites More sharing options...
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