Question about Craftsman Air Tools & Compressors
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Posted on Jan 02, 2017
Parts for coleman are available at www.mastertoolrepair.com your compressor is listed as L0502710. If however you like to tinker, you can make a pretty good reed valve out of aluminum can material or other (any ideas?). It is fairly easy to cut, does not last as long as factory stainless steel, but for short term, why not? Good Luck
Posted on Jan 10, 2009
Without knowing specifics of your unit, If there are three reeds, then two are probably for intake and one for exhaust. Intake reeds should be on the piston side of the valve plate, discharge reed should be on the head side.
There should be a divider in the head side to separate the inlet from the discharge. Make sure the valve plate is turned so that the air from the air filter side goes to the side with the intake valves, and the air from the discharge valve should go to the side with the pipe to the tank.
Posted on Oct 22, 2009
SOURCE: I have a Craftsman compressor
you must have wired the new pressure switch incorrectly .when the pressure switch opens it will release the head pressure so your compressor must be running with the pressure switch contacts open should be 4 connections 2 marked motor which is from your compressor and 2 marked line which is your power coming in
Posted on Jun 15, 2011
SOURCE: I have a craftsman air
It sounds like a bad gasket. Either the one between the valve plates or the one between the head and top valve plate. The top gasket is the most common one that fails. If the middle of the gasket is broken, where it separates the intake from the exhaust, you will get symptoms just as you described. Will only build up a small amount of pressure. Here is a link to look at the parts diagram and to order parts from.
Posted on Jul 18, 2011
Were the gaskets in fine shape? If you get a tear in the middle of the head or valve plate gasket, where it separates the intake and exhaust, then the pump will only build up pressure to the range you have or sometimes up to only the 50psi range.
Another thing to check is if it has a one way check valve that goes into the tank where the pump line/hose feeds from the compressor pump into the tank. Many of the check valves use a simple plastic cup and a spring. If they get stuck open then that will also make it not build up pressure.
The other part I can think of is the control box but usually when they fail they either won't turn on the unit or they will leak air.
The last thing to check would be the piston ring(s) and cylinder/sleeve. The oil less compressors will wear these items out far more often then an oil style will. When the oil less piston and sleeve get scored up (from dirt ingestion) then they also will not build up much pressure.
Posted on Jul 20, 2011
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