20 Most Recent Ingersoll Rand 231C Ks 1/2" Super Duty Air Impact Wrench Kit With Flip Socket Set And Bit Driver Set - Page 5 Questions & Answers

MAY BE LOW ON GAS

make sure the cooler(s) are clean. Next check the airend discharge temperature switch commonly called a HAT (High Air Temp) switch. These switches will reset as the compressor cools down. I would be able to access the switch quickly. Run unit until shutdown remove wires and see if switch is open. if open you found your problem

its because the compressor is not unloading { going above 120psi} you need to check the air signal going to the unloader valve located on top of the screw, it should start putting out air at about 90psi to close the unloader. another thing is if you are getting oil in the air coming out of the front ball valve the seperator element is bad thats the filter inside the tank the pop off valave is mounted. you can check the air signal by fethering ball valve to run the machine at 90 psi the diconnect small air line on unloade to check for air signal coming from regulater

Hi, Hope I can help you. When you say intermittently hums and trips from start-up. Is this when the receiver tank is empty, or up to pressure?One of the first thing to try, you seem to have done, it is usually the check valve which can cause this.The second thing to check would be the capacitor, but you say you have replaced the motor, was the motor AND the capacitor replaced at the same time?By what you describe it does sound like a power problem, the pressure switch shouldn't be the cause of the humming. (The pressure switch simply tells it to switch on when the pressure is low, and to shut off when it is up to pressure)Do you have any other power tools or equipment plugged into the same system? It may be that you might not have enough power to run all your machines?Finally, do you have your compressor plugged into an extension lead? Vital power can be lost doing this, if so, and if you can, plug it straight into the power socket and try that. Kind Regards Carl

Ingersoll rand parts and manuals are available at www.grainger.com, or call you local grainger store, they have a very good customer service for faxing parts lists to your place. Notice: some Ingersoll rand compressors have been recalled. Check the address below. If you have general questons about a problem that you are having, post again. Good Luck

http://www.cpsc.gov/cpscpub/prerel/prhtml02/02108.html

Doosan have now taken over all Ingersoll Rand Portable Air Compressors, if you contact them they are normally very helpful.