Bigben89 Posted January 4, 2016 Share Posted January 4, 2016 Hello all,I was driving my B Model around this weekend when I heard a huge whoosh of air. I correctly assumed I blew an air leak somewhere in the system and slowed down to stop with what remaining pressure I had left and limped back home. However I have been through the entire system and I am not able to find the leak. Additionally, the system won't pressurize from the compressor on the engine. Does this mean my problem is a bad compressor? Is there a way to reverse pressurize the system or fill it with something to help me find the leak. First timer with this problem thanks! All advice welcomed as always. Quote Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/ Share on other sites More sharing options...
theakerstwo Posted January 4, 2016 Share Posted January 4, 2016 You need to get a kid out there to help you.They may be able to hear better.But remember this if there is no pressure you will not hear a leak.And if there is a bad leak you cant build pressure.Best thing or simple thing is find the # 1 tank and pull a fitting and air it up with shop air.With shop air the engine is not running and you may hear a leak.Best place to air the system is remove the discharge line on the compressor and air it up.That ia a rough way of checking but its better than guessing and start replacing parts. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318628 Share on other sites More sharing options...
Gmerrill0516 Posted January 5, 2016 Share Posted January 5, 2016 I had taken a bunch of dead air stuff off of my truck and then had to assemble it enough to move it and had the same issue. I dug around and found it by looking but what theakerstwo said above is right. Pull a fitting and hook up shop air and you will find something for sure....no pressure, no sound. Quote Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318630 Share on other sites More sharing options...
Freightrain Posted January 5, 2016 Share Posted January 5, 2016 Must be a bad leak. The compressor on the truck doesn't have enough CFM to make enough pressure to make enough noise to find it. Like mentioned, put some shop air in the tank and see where it makes noise. Might be the main line off the compressor that blew? Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318681 Share on other sites More sharing options...
Quickfarms Posted January 5, 2016 Share Posted January 5, 2016 All of my trucks have a quick disconnect on one of the tanks. This is usually used to air up tires. With a double ended fitting we can air up most of the system. It will not air up the the wet tank but will allow us to test the rest of the system Quote Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318689 Share on other sites More sharing options...
Bigben89 Posted January 5, 2016 Author Share Posted January 5, 2016 Much appreciated everyone! That was my biggest issues was there's just to much damn noise to find anything and if I can't build pressure can't find a leak so making pressure from the opposite end makes sense. Case closed and thank you. -B Quote Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318712 Share on other sites More sharing options...
220cummins Posted January 6, 2016 Share Posted January 6, 2016 Is the discharge line from the compressor supplying air? Disconnect and check to see if the compressor is building air. Quote Link to comment https://www.bigmacktrucks.com/topic/43381-61-mack-b-model-air-system/#findComment-318797 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.