Quote:
Originally Posted by mackwrench
OP .....you get things figured out?
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I took it to Four Star Freightliner last week.
They were very courteous and eager to help me.
We camped their parking overnight and the next day a tech asked me about all the air related probems thar we were having. He originally suspected an issue with a check valve. He spent 3 hours under the coach, checking things in front and in back. I saw that he bypassed the new dryer at one point. He also connected shop air to it a couple of different ways.
After he had run it for awhile it would fail to build pressure. It even got to a point where he could hold his thumb over the output hose directly from the compressor.
Finally, his assessment was that either the compressor reed valve or unloader are causing the problem. I asked if there was evidence of any debris in the system and he said no, that any debris from the fibrous component that failed in the original dryer would have been caught by the filter. I remember that when the mobile tech temporarily removed one of the water drain valves the screen on it was shiny and clean as new.
Unfortunately Freightliner has no idea when they will be able to get a new compressor. They have it on order, but said that it may take as long as 2 months to get here. My motorhome is now sitting in their lot awaiting parts. The new compressor, installed, is going to cost $7200, and I had already spent $3000 on the air dryer and diagnostics before I took it to Freightliner.
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