Air Tools & Compressors - Recent Questions, Troubleshooting & Support

Contact Prime Air directly to request the parts diagram. Be sure to specify the model.

Air Tools &... | Answered 11 hours ago

Sounds like the pump discharge check valve. Should be located at the inlet to the tank. Drain air from tank and clean debris from valve. If it is stored in a non heated garage, the valve could have ice in it, stopping it from working.

Air Tools &... | Answered 21 hours ago

No water = no pressure. The pump fills the tank with water putting pressure against the bladder inside. Start the pump until it shuts off. Check your tank pressure. Set the tank pressure to 2psi lower than the cut-off pressure of your pumps own cut-off pressure. A tank is used to give water pressure long enough for the pump to start and build it's own pressure. When you stop using water, the pump refills the tank. Ready for the next time you turn on the faucet.

Air Tools &... | Answered Yesterday

My Emglo Air-mate manual calls for 8 oz of oil. Most all of the smaller compressors use about the same except for Dewalt that uses 12 oz.

Air Tools &... | Answered 2 days ago

The head pressure is released thru the needle unloader valve at the pressure switch. Notice a 1/4 inch plastic tube (or metal) running from the intank check valve to the pressure switch. After pressure switch reaches set pressure a small tang moves up and presses on the needle valve releasing the pressure. Only a small amount of air will be released. If however air continues to escape from the needle valve, then the check valve is bad.

Hitachi EC12... | Answered 2 days ago

This problem is usually caused by reed valves or blown gasket between head and valve plate. Easy to check. After the compressor reaches 45 to 50 psi, with compressor still running, remove the air filter and feel for good suction at the intake port. If the air seems to be blowing out of the intake, then valves are bad. If you feel good suction at the intake, then air is leaking from the discharge tubing or other fittings. Good luck

Hitachi Air... | Answered 2 days ago

The pressure regulator can easily be replaced by removing the large plastic decorative cover. The manifold behind the cover is the part where the regulator , gauges, and quick connects are attached. The manifold is fed air from the pump via a plastic hose connected to the pressure switch. The regulator sells for about fifty dollars. This part usually fails in two ways. It leaks air from the knob or no air pressure will reach the quick connects. If your problem is no air at the quick connect, you can do a temp repair by removing the safety valve and installing a tee fitting at the port. On the tee fitting reinstall the safety valve and a quick connect on the other fitting. This will give you tank pressure . Good luck.

Hitachi EC119SA... | Answered 2 days ago

The reset button is located under the cover visible from the dipstick side of the pump, however, if there is no visible button, then the reset is incorporated within the windings of the motor. The reset hidden in the windings does fail and can be eliminated with much effort. If the motor is cutting out for no apparent reason and comes back on after it cools or if the unit will not power on and all components test good, then suspect internal reset. The internal reset fails if the motor has been overheated many times by low power, or too long of an extension cord or powered by generator.

Hitachi Reset... | Answered 2 days ago

Easy to check trigger valve on Paslode 350s. Just connect air pressure to the gun and listen for air leaking from the valve. If still not sure if air is leaking from the valve, remove the trigger by removing retainer pin and spray soapy water on the valve. A very slight leak may not affect the trigger action. Most trouble for this gun is due to worn parts in the headvalve or lack of lubrication. If the gun does not fire correctly, try lubing the orings in the headvalve with white grease. If firing improves with grease, then orings or other headvalve parts are worn. Good luck

Air Tools &... | Answered 2 days ago

Most likely your pressure cut-off switch is defective. Not as common but it happens that somehow your pressure switch has been turned way out of limits and could just need to be tightened down to within specs OR...

The following is a description of the control panel indicators.
Motor Running Indicator,
Pressure Indicator
The pressure indicator shows the current operating pressure of the sprayer. It has three different indications: blinking yellow, solid yellow, and solid green.

Blinking yellow: When the pressure indicator is blinking yellow, the sprayer is operating between 0 and 200 PSI. A blinking yellow pressure indicator means:
• The sprayer is plugged in and turned "ON"
• The sprayer is at priming pressure (little or no pressure)
• It is safe to move the PRIME/SPRAY valve between positions• It is safe to change or replace the spray tip.
NOTE: If the pressure indicator begins blinking yellow when the pressure control knob is set at a higher pressure and the Prime/Spray valve is in the Spray position, either the spray tip is worn or the sprayer is in need of service/repair.

Solid Yellow: When the pressure indicator is solid yellow, the sprayer is operating between 201 and 1900 PSI. A solid yellow pressure indicator means:
• The sprayer is at the proper pressure setting for spraying stain, lacquer, varnish, and multi-colors
• If the pressure indicator goes to solid yellow when the pressure is set so that it starts at solid green, it indicates one of the following:
a.Tip wear Indicator — when spraying with latex
or at high pressure the solid yellow appears.
This means the tip is worn and needs to be

b.Tip Too Large — when a tip that is too large
for the sprayer is putin the gun, the pressure
indicator will turn from solid green to solid

c.Fluid Section wear — if a solid yellow
pressure indicator appears when using a new tip
and the pressure is set at maximum, service may
be required (worn packings, worn piston, stuck
valve, etc...).

Solid Green: When the pressure indicator is solid green, the sprayer is operating between 1901 and 3300 PSI. A solid green pressure indicator means:
• The sprayer is at the proper pressure setting for spraying oil-based and latex house paints
• The sprayer is operating at peak performance at a high pressure setting.

Motor Running Indicator: The Motor Running indicator is on when the motor is commanded to run. This indicator is used by service centers to troubleshoot motor.

Using the last ppg. about the "Motor Running Indicator"... if it is showing it then it is in the commanded mode to run continually. switch that dude to off command!

Air Tools &... | Answered 3 days ago

Unsure of your model of paint sprayer, however, mine used a 2/3 turpentine to 1/3 paint to spray without clogging. Some people unscrew the paint holder and replace it with a paint can which can hold more of the paint mixture. Hope this helps.

Graco Air Tools... | Answered 3 days ago

It appears that your internal vibrating pumping mechanism is seized. Soak the whole spraying portion in paint remover for a few days and then totally clean it out and try with hot water with strong detergent before trying with paint. Not working still = toast, sorry, mine went to recycling

Air Tools &... | Answered 3 days ago

Control the checkvalve on the tank for dirth
Sludge in the oil ? clean and refill , or the electric field can be having a thermal problem, old capacitor (deformed)

Air Tools &... | Answered 3 days ago

control the check valve on the tank for dirth or more can be an cilinderhead membrane or an broken gasket or the pressure relief will not close

Air Tools &... | Answered 3 days ago

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