Not pumping up to capacity, motor and compressor working fine,
The tank does not get up to full charge of about 115 psi. this is a four gallon, twin tank design. Oilless, compressor. My pressure gauge pumps up to desired psi directly off the compressor unit. check valve/
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Re: not pumping up to capacity, motor and compressor...
If your pump is shutting off before it reaches it's max psi. then you need to adjust you switch. Under the black case there are two adjustment screws. One is the high\low adjustment, the other is high pressure cut off. The first will change when the pump turns on and off for your low psi setting and the high setting simultaneously. The second will allow you to raise or lower just the high setting. There should be a diagram under the black cap to show which is which. Adjust the high side only and just a 1\4 turn then run the compressor and see if that takes care of the high setting.
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Check if air intake is clogged. Check if drain valve on tank bottom is open or closed. Look at pressure gauge and see if pressure is zero. Adjust pressure so tank will hold 80-120 psi. Check air lines between compressor and tank to see if they are leaking. Listen for leaking air while motor is running.
I think I follow you... the adjuster over the large screw is used to set your tank pressure but also sets the cut-in/cut-off pressure. You have another regulator to control the pressure to and thru your hose but that doesn't insure that you won't exhaust the tanks supply and use more air than your pump can produce. It doesn't matter what pressure you set it at if your pump can't produce enough cubic feet per minute of air to keep up with your output. If your air use/output is within the pumps output, your idea will work just fine and you can set the hose regulator just below the cut-in pressure but Remember, even a little airbrush uses a lot of compressed air but sanders, grinders, sprayers and impacts use a Ton so don't try this without having somebody monitor the compressor periodically while you try it. It all depends on your air demand.
Sounds like the pressure regulator has gone bad. That controls how much PSI your system is aloud to have. If this fails it will not fill to max capacity. I would replace that and all will work just fine.
Model Number: SS3J5.5GH-WB Manufacturer: Ingersoll Rand Tank Size: 8 Gallons Engine Engine HP: 5.5 HP Engine Type: Honda GX 160 Fuel Tank: .8 Gallon Pump CFM @ 90 PSI: 11.8 Max Pressure: 135 PSI Certification: UL/CSA/ASME Overview Dimensions: 43" x 18" x 26" Product Weight: 175 lbs this can be a reference.
2 gallons is small to begin with u need to buy an in line pressure adjuster/regulator their a few bucks and can be attached to the paint gun or line and will keep the pressure at ur adjustment the regulator on the tank sets the tank pressure at 50 so when u us it will let it drop down to about 45 than start up to build the pressure up to 50 than shuts off than repeats it self the inline keeps pressure steady even if tanks are at 200 psi
You stated that the compressor started up fine. I'll assume it reached it's max psi then cut out. Then upon reaching it's cut-in psi the motor ran slowly for a few seconds, then kicked off. I also assume you mean check valve when you refer to the non return valve. If this sounds about right then. The first thing I would do is bleed out all the air from both the tank and the pump supply line leading from the pump head to the tank's check valve. You can do this by simply loosening the fitting that attaches the line at the head or the check valve. Once done try running the compressor again. The purpose of this is to check the unloader valve. This valve bleeds off the pressure that remains in the compression cylinder and the supply line up to the check valve. When functioning normaly it will bleed off this pressure once the motor shuts off. If it is not working correctly then when your compressor starts back up (once it is already been filled) the piston will be working against a psi close to the max psi.
If the problem reoccurs only after the compressor has reached it's max psi, then the unloader valve is most likely the problem. If however it will not start up at all even after a complete bleed then it has to be something internal to the pump and\or motor.
Please try this and let me know (or repost) your findings. If it's the unloader valve I should be able to explain how to repair this valve. Good luck.
Here are the specs on your compressor: Electric Single Stage Air Compressor, Motor Running Power 5.0 HP, Free Air Flow @ Maximum Pressure 16.1 CFM, Free Air Flow @ 90 psi 18.0 CFM, Maximum Pressure 135 PSI, Phase Single, Voltage Rating 230 Volts, Current Rating 21.5 Amps, Tank Capacity 60 Gallons, Tank Type Vertical, Height 71 Inches, Length 20 Inches, Width 30 Inches, NPT Outlet (F) 1/2 Inch, 60 Hz
Good luck with your new comressor.