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The dryer cycles as it should per meritor manual (about 4 or 5 minutes) if i turn the engine off while the. After the system purges, there is a slow but steady air leak from the purge valve
Shut the truck off and it still leaks While the air pressure is building, there is no leak, as soon as the dryer purges it starts leaking from the purge valve again and continues to leak until the compressor kicks in again It will loose down to 60 psi in about 45 minutes, and is completly depleted in about 1.5 hours
I change the purge valve, but that didn't help.
The air dryer leaks out the purge valve lightly, until the compressor sends pressure down the control line, then it dumps and stops leaking Without the control line attached, the purge valve leaks lightly continuously. In this video, ryan will share with you a quick fix for air dryer purge valve leaking issue Hope it will help you on the road
A leaking air dryer purge valve is a serious issue that needs immediate attention Air dryer constantly leaks air cause Constant hissing or leaking sound, rapid loss of air pressure Remove and inspect the purge valve
To troubleshoot a truck air dryer, first, check for air leaks and inspect the dryer cartridge for damage
Verify the purge valve and governor are working correctly, and ensure the air dryer heater functions Examine the desiccant for saturation and check for blockages in delivery lines. Air dryer diagnostics dryer is leaking from purge valve during compressor loaded cycle Excessive compressor cycling or failure to build air pressure may occur
Possible cause purge valve is frozen open due to cold temperatures Debris, such as particles from the fitting or air inlet line, under the purge valve seat. Purge valve washer oriented with flange pointed down as shown. I have a 2014 peterbilt 579, mx13 motor
The air dryer is a bendix ad is
When the air pressure goes a little below 100 psi, the compressor kicks in
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