Question about Air Tools & Compressors
Many small air compressors are made with ceramic internal parts, when they wear out there is no fixing them, one must buy another compressor
Posted on Oct 21, 2013
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Posted on Jan 02, 2017
SOURCE: Electric Air compressor
Is it building pressure in the tank and just not going out your air hose ? Or is it not building any pressure in the tank?If it is building pressure than the problem is narrowed down to your outgoing channels which does simplify things.(-8 Either something has got clogged in the outgoing airway, or there is a good possibility that the pressure regulator needs new parts if you can find them or just replace it. Have you tried turning the regulator output up or down? It may be stuck all the way closed which would shut off the air coming out.If your not building any pressure then the piston/s may need new rings or the cylinders are scored and need machine work. That part works basically the same as the piston/s and valves in an automotive motor. Except instead of pulling a fuel mixture in and igniting it for power and then pushing out the exhaust, it pulls in air and pushes it into the holding tank compressing it to X# of psi with the assistance of a check valve.
Posted on Nov 17, 2008
I have worked on many makita compressors and have run-across this problem on a few of them. Your compressor has a check valve that is supposed to hold tank pressure after the switch reaches set pressure. There is an unloader valve built into the pressure switch that releases the pressure in the discharge hose after the unit shuts off. The unloader allows the compressor to restart with-out any pressure in the discharge line. If the brass check valve is leaking pressure back into the system, air will leak out of the unloader valve. Follow the discharge line to the tank and you will see the brass check valve. To test valve for fault, run the compressor till it builds around 80 psi and unplug the unit from the wall outlet. Remove the 1/4" hose connector from the check valve and check for air leaking out of the valve. If it is leaking you can order form www.toolpartsdirect.com. or call the makita 1-800 number. The price is about the same. Good Luck on your repair.
Posted on Mar 19, 2009
this is probably an "oilless" compressor, it has "piston" with a thin ring of leatherlike material acting as a piston ring, the "cylinder" is an aluminum sleeve - what usually happens is the cylinder gets scratched from dirt or just wear or the leather ring deteriorates, that's why it will go only so far - the only fix for this is to replace the cylinder and the piston
Posted on Aug 18, 2009
Oil free pumps do tend to blow the piston ring (not too expensive) available at searsparts.com. Remove covers to pump and manually turn crank until piston is at top and look at the condition of the cylinder neer top, If it looks scratched, order cylinder kit with piston ring. If it looks good and shiney, could be the valve plate in the head. There are reed valves that tend to break. Run pump however with covers removed and check with soapy water for air leaks and repair as needed (air leaks under the cover will prevent unit from filling). Good luck
Posted on Nov 13, 2010
SOURCE: We have a Craftsman 15
compressor 15gal upright model 919.166442 ser 2616098346 will not pressurize greater than 30psi. Once 30psi is achieved a release sound (possible bypass) begins. Motor then runs continiously.
Posted on Jul 09, 2011
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