Question about Hitachi EC25E 5.5 - Horsepower Air Compressor
You need to spray the valve with WD-40 and let it soak a while. Then get on it with a pipe wrench. Home Depot has a new one. You will be able to replace it today. Try getting it out and put in a new one.
Plan B: Adjust the 'pressure switch' down to 140 PSI and maybe you can run that way for a while until you get a new pressure relief valve. Just turn the adjustment down a bit and keep trying it until it holds air.
(the pressure switch controls the air pressure by conttroling where the motor stops and starts)
If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c
Posted on Sep 20, 2009
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Posted on Jan 02, 2017
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