mcratchet1 Posted October 2, 2020 Share Posted October 2, 2020 I have a 2007 Mack mr688s that’s getting quite a bit of water in air tanks every day also purge valve is popping off about every 15 seconds I’m checking for air leaks now! Is this signs of air compressor failing? thanks!! Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 2, 2020 Author Share Posted October 2, 2020 Also I drain them every night I’m in Florida so still hot here. Quote Link to comment Share on other sites More sharing options...
Quickfarms Posted October 4, 2020 Share Posted October 4, 2020 When was the last time the cartridge in the air dryer was replaced? Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 5, 2020 Author Share Posted October 5, 2020 Great question and I’m not sure on so I’m going to replace it now thanks!! Quote Link to comment Share on other sites More sharing options...
Quickfarms Posted October 6, 2020 Share Posted October 6, 2020 Also replace, or rebuild, the purge valve, the spitter. They have a habit of spitting a lot when they are closed. Also check the governor and the small signal hose from the governor to the air dryer Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 7, 2020 Author Share Posted October 7, 2020 Ok I replaced air filter cartridge and purge valve will check air lines thanks!! Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 10, 2020 Author Share Posted October 10, 2020 Ok replaced governor, purge valve, air dryer cartridge, and all 3 lines coming over governor. I cannot find any air leaks but no change purge valve pops off every 10 seconds what else am I missing ? Quote Link to comment Share on other sites More sharing options...
mrgumby Posted October 10, 2020 Share Posted October 10, 2020 (edited) The unloader valve in the comp head Edited October 10, 2020 by mrgumby 2 Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 12, 2020 Author Share Posted October 12, 2020 Ok thanks I’ll check price on it Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 19, 2020 Author Share Posted October 19, 2020 Ok changed unloader valves no change at all. Still popping off every 10 seconds. The air compressor was replaced about 3 years ago. I guess it’s time to change again? Does anyone have any other idea what might be causing this type of problem? thanks!! Quote Link to comment Share on other sites More sharing options...
mrgumby Posted October 19, 2020 Share Posted October 19, 2020 I went through the same thing your going Thru one time. Did everything you did and the last thing I did cured it. Changed the air dryer and all was good. Pulled the old dryer apart and it must have froze at one time it had a crack where the filter cartridge went on it I found it by putting a torch over the whole body and in about 1 minute you could see the crack. Other than that don’t know what to tell you Quote Link to comment Share on other sites More sharing options...
mcratchet1 Posted October 20, 2020 Author Share Posted October 20, 2020 Ok thanks Quote Link to comment Share on other sites More sharing options...
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