My 5 hp Campbell Iron Horse 20 gallon air compressor doesn't have pression. Put new regulator on it but didn't help. Checked for water in tank-nothing came out. Doesn't seem to have any holes in the air hose. Any ideas?

Take a look on amazon for it: Amazon com iron horse air compressor parts. I hope I helped. regards. John

http://www.chpower.com/manualsearch/
You can get a wiring diagram from them directly

Check Valve in the tank where the air
enters from the tubing leaving the compressor

Call Campbell & get a new one
They are good to talk to on the phone
& you can order parts without all the internet hassle

Mobile synthetic 10-30 , Craftsman compressor oil if K-mart or Sears are near by. You can also use a non-detergent 10 - 30 motor oil , I use Mobile or Craftsman in mine. I have three - one is a Campbell Hausfeld this oil is per their book - (minus the Craftsman)

Don F

http://www.chpower.com/manualsearch/

Try chpower.com. This is Campbell- Hausefeld's website.

The issue suggests that the head gasket is blown between the two cylinders or the reed valves are not seating or broken. The only other condition that would cause this is a leak. Here are a couple of simple tests. For leak spray soapy water on all connections and fittngs including the pressure regulator and the bottom of the pressure switch while unit is running. Repair as needed. If no leak is found, run compressor untill it reaches 60 or stops increasing and feel for suction at the air filter intake. The best way to check for suction is to remove the air filter and feel for suction at intake port-hole. The suction should be very strong. When valves are leaking it almost feels that the air is blowing out thru intake. If little or no suction, remove head and valveplate and replace parts as needed. Parts are available at www.chpower.com or www.toolpartsdirect.com. Good luck and post again if you have other question.

Dear,
Please check the Valve assembly, Also check the Cylender and Piston for any scraches.
Regards
Ashfaq

clean fuel tank, and lines. just do a standard tune up. check every componet for wear or rust.

there is a tiny O-ring on the adj. knob you will need to replace it .hope this help's