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Compressor oil check

Have an older compressor with no obvious oil fill location. Runs till cylinder gets hot then stops-will add oil, dont know where to add it..... part # on cylinder is 4065237. melben products 1098607

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They don't always make them obvious. Look for a bolt in a place it shouldn't be, like on the end of the compressor, and look under it. Are you sure it is not an oiless compressor. A picture would help figure it out

Posted on Jul 18, 2009


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What causing hot air to come out of air compressor cylinder

The air is always warmer coming out of a compressor. As air is compressed it builds heat, also the mechanics (friction) of the compressor builds heat. So you add these two together and you get some rather warm air out of a compressor, especially if it runs for a while. I hope this helps.

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I have a craftsman air compressor, model 919.167620, that will start running and then after about a minute it starts running slower and slower till it stops. it doesn't seem like it runs long enough...

The nonreturn valve that lets the air into the tank is stuck or faulty and not letting the air through, so pressure is building up in the pipe and cylinder and stopping the motor. If you open the back of the valve and run the motor you will know if that is the problem. Stephen.

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Check for leaks all over the machine. Possibly the O ring on the drain valve is damaged. If the machine is oil-less, the big rubber O ring on the piston could be worn away.
When the machine is turned off can you hear air leaking from anywhere?

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I have a150 psi compresor that is 5 years old. it currently does not reach 150 psi without running for a very long time and sometimes just stays at 120 psi and wont get any higher ( the motor just keeps...

Repair all leaks to get true test of condition of cylinder / piston ring and check/reed valves. It is reccommended to know amount of time to fill tank when new and compare this time to present. Filling time is indication of wear. Another method to discover wear is to remove cover to pump and examine condition of cylinder wall close to top of cylinder (on oil-less models). If you see scratches on cylinder, air is leaking past piston seal. On pumps that use oil, very hot discharge air hose or pump head is indication of leaking valves or head gasket. Sears usually has good prices on replacement parts. Good holidays

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