Joe:
There is an air leak somewhere in either the tank connections or the hose connections. Look at the tank and find the tube that runs from the top of the compressor to the tank (usually a brass line). grab a spray bottle and fill it with a soapy solution (dish washing soap and water is fine). Disconnect the rubber air hose from the tank (at the quick disconnect) and start the compressor. Spray the dishwashing solution on the brass line end fittings at the compressor head and the tank connection, and the quick disconnect fitting and where the quick disconnect connects to the air tank. If you see bubbles being blown, that is where your leak is. Also connect the hose to the tank and check your hose for leaks with the soapy solution. Once you find where the leak is, you can tighten the fitting or replace the faulty gasket or hose.
SOURCE: high/low pressure spring settings
Generally, the pressure switch is not adjusted more than once or twice in the life of the compressor since the discharge pressure can be adjusted with pressure regulator. However the life of the compressor can be increased if lower pressure settings are maintained. Your pressure switch was set at the factory to a setting of about 120 - 150. If your cutout pressure is higher than 150 surely lower.
STEP 1: Turn Main Calibration Screw ( center screw with large spring) clockwise to increase pressure and turn counter-clockwise to decrease pressure.
STEP 2: Turn Differential Pressure Screw (small spring) clockwise to decrease cut-in pressure and
turn counter-clockwise to increase cut-in pressure.
Differential Pressure is defined as the difference between cut-out and cut-in pressure. There should be about 7 to 12 psi difference between cut-out and cut-in.
In our shop we rarely adjust more than a couple of turns because these switches are sensitive.
Good Luck and please post again if you have other concerns about your compressor.
SOURCE: air compressor not working
If your motor is running and not the pump, the malfunction is either in the pump or the coupling between the motor and the pump.
Some of these compressors are manufactured so cheap now that there can be just a set screw that is loose and the motor shaft is spinning free inside of the crankshaft.
If you drain the oil out of the pump and take off the pump crankcase cover, you should be able to see the problem.
SOURCE: Campbell Hausfeld Air Compressor won't start
The compressor starting problem is common to most of the small portable compressors. Poor design and undersized components are to blame. If you have one of these units i suggest looking into a product called the Smart Start by Conrader Valves. It is interchangeable with the standard air filters and allows the compressor to start without fail. check it out- www.conrader.com.
SOURCE: I have a model FP209501 Air Compressor 2 Gallon,
The spray gun consumes more air volume than the compressor can deliver. You can pause painting periodically to allow the compressor to 'catch-up' or buy a larger delivered-volume compressor. The compressor that you have was intended to supply air for pneumatic nailers and staplers in an intermittent fashion. Hope this helps!
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