C609T Posted March 17, 2016 Share Posted March 17, 2016 Got a 1961 B81 that takes atleast 5 minutes to build 90 pounds. I took the line that goes to dryer off and it seems to be supplying air well. There are no leaks anywhere so were is the air going. Could it be a problem with dryer or something simple like the governer ? Quote Link to comment https://www.bigmacktrucks.com/topic/44365-air-compressor-problem/ Share on other sites More sharing options...
stuie56 Posted March 17, 2016 Share Posted March 17, 2016 air up the truck with shop air to wet tank listen with truck off you should find leak it might hehp to get a kid to listen ,,,i know i have trouble hearing any leaks Quote Link to comment https://www.bigmacktrucks.com/topic/44365-air-compressor-problem/#findComment-327679 Share on other sites More sharing options...
Hobert62 Posted March 17, 2016 Share Posted March 17, 2016 I read on here somewhere that some of the air compressors have there own metal screen filter. It gets gunked up and needs cleaned. Just an idea to check out. Good luck. Quote Link to comment https://www.bigmacktrucks.com/topic/44365-air-compressor-problem/#findComment-327700 Share on other sites More sharing options...
Freightrain Posted March 18, 2016 Share Posted March 18, 2016 What happens when you bypass the drier? If it is getting good air to it then I would remove it and see if it works fine without it. If the drier is anything like we have on our compressor at work it has a disectant(sp) filter that could be clogged. If we run the old compressor it pumps lots of oil and it will clog the filter til hardly any air gets through the filter so I have to bypass the filter if I have to run it. The unloader valve in the compressor could be leaking back and not actually making good pressure. Or the governor is holding it open? Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/44365-air-compressor-problem/#findComment-327797 Share on other sites More sharing options...
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