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Baldwin City, KS | We have a '72 Ford L 9000 that we pull a trailer with. It started out by way over pressurizing the system and not kicking out. Put a gov on compressor and partially solved the issue. Right tank pressures up and levels off normal. Left one won't pressure up at all. I've determined that it gets supply from the right tank which appears to handle trailer supply. I cleaned up the little bypass valves and made sure air is flowing to left tank. Still can't get it to pressure up past 55#. I've aired that tank up manually with poor results as well. It seems the air is leaving that tank as it's put in. I can hear air moving in the system, but find no external leaks. Seeing as how the tanks appeared to be tied together, I'm at a loss as to how one holds good pressure, but the other won't pressurize. I'm assuming problem is downstream from left tank, but I'm not knowledgable enough on air brakes to diagnose further. Any thoughts? Thanks. | |
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Air brake trouble with older L 9000 Ford.
