Manual for Emglo Air Mate Compressor

I just rebuilt my Emglo AM78 4CHV, new pressure switch, unloaded, check valve, aftercooler, and changed the #30 oil, It takes 4oz.
Runs like new after not cutting in/out correctly and purging air before reaching 125 psi. Kicked it down to 115 max psi via main spring setting. Don't need 125 for trim nailing and siding.
FYI don't use cheaper generic 125 psi pressure switch from Amazon!!
use Jenny M4-1247 (140-1074-01)

There is a motor reset button, here is a link to the manual

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDAQFjAC&url=http%3A%2F%2Fdocuments.dewalt.com%2Fdocuments%2FEnglish%2FInstruction%2520Manual%2FN366419%2CE810-4V.pdf&ei=PCjRVIe5Iou5oQTG94FQ&usg=AFQjCNEIjOIcd1H8HDUuCL4iq-jZps_gIA

There are four screws that hold the end cap on the pump. The fifth screw at the bottom, middle of the cap is the oil drain plug.

Normally the value is about 10-15 MFD/400 Volt.

Need to use air compressor oil it is available at you local hardware store in the tools department.

Try at eReplacementParts.com : Power Tool Parts and Tool Repair Diagrams.

If you need more help come back.Post / thumbs / testimonial are welcome!

I had the same problem. Replace the motor capacitor. small white cilinder part with two wire plugs conected to it. This will have a single bolt holding it to the frame casing, you will find it under the black plastic shroud that covers the motor. Take it into any electrical or compressor shop and they will check it for you. costs about $35.00.

use sae 30 non detergent oil in this compressor let me know if you got any other qeustions

Emglo airmate compressors are set from the factory to shut off at around 125psi. There is an adjustment (remove cover to pressure switch) that will controll the cut-off pressure but it is not recommended changing the factory setting. There is also a safety valve installed that will open at about 160psi. It is a small brass device with a pull ring. When things go wrong with the pressure switch (rectangular box with power cord coming out of one side) the safety will pop open. There is a pressure regulator with round knob on panel that will lower the pressure to the tool, however this regulator does not control the pressure switch. Let you compressor run untill it shuts off and verify pressure to be about 125, if it is then all as well. Good Luck

The switch is bad, replace it, this should solve the problem.