SOURCE: My EC12 builds up pressure, but then releases all but about 10 psi.
The non-return valve is sticking and it's an easy fix. First, for safety, unplug the electric power to the unit and release any pressure in the tanks. Then unscrew the cap of the non-return valve (between the compressor and the tanks). Inside you should find a tapered rubber plug which is probably sticking in the valve housing. Sand down the diameter of the large end of the plug, being careful not to damage the flat face at the narrow end (which is the sealing surface). For sanding try 400 or 600 grade wet-or-dry paper and sand until the plug just moves freely in the housing. Reassemble and the compressor should work. Incidentally it's an oil-type unit, and quite durable. Make sure it has enough oil.
SOURCE: My EC12 builds up pressure, but then releases all but about 10 psi.
Bruno2
This was a great find, been having this problem for a while, but your suggestion worked. Thanks so much.
twodogs2
SOURCE: The compressor relief valve keeps popping, compressor runs
What pressure is it popping off at? You might have to adjust the pressure switch to a lower setting.
SOURCE: keeps stalling out
It sounds like you will have to adjust the governor system to hold the throttle on the motor open more so it doesn't bog the motor down. There should be an adjustment screw at the carb to perform this.
Hope this helps
SOURCE: I have a quincy 350 and the relief valve on the
It won't be rings. You may have solved the main issue with the valve replacement, but still have a weak safety valve, especially if it was popping a lot before your repair.. I'd try replacing the safety valve before going much further.
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