Porter Cable Compressor CPLC7060V 220V

[Erick68]

I purchased this used right before Christmas 07 and just hooked it up this weekend. I have about a 40 ft run from my main service panel to a sub panel using a no. 6 wire that I run my welder, from there I added a box with 2 - 20 amp breakers and ran a no. 12 wire about another 45 ft to a 20 amp recepticle and from the recepticle I used the existing plug off the compresser motor, looks to be a no. 14 wire.
Here is my probe, the air compresse starts up and run fine until it get to about 20 psi and it starts bogging down and the after about 1 minute the over load kicks out.

Any ideas?

[cmoorejack]

Hey eric68,
It sounds like you have adequate power supply..you may have a bad check valve on the air compressor and it is letting air back out of the tank and then back in to the pump head..also make sure you don't have anything else running on the same circuit by mistake..also make sure it is 220 and not 110..anyhoo..to check if it is the check valve just undo the the fitting[make sure you have some air in the tank] on the small copper tube going to your pressure switch and see if it leaks..if it doe's that is the problem..
hope this is helpful..
Craig

[Erick68]

Ok I ordered an new check valve took about 2 weeks to get here and replaced it. It starts and runs up to 40 psi and just keeps running. Does not want to go above 40 psi. What next?

[cmoorejack]

Make sure your drain cock is fully closed..[bottom of the tank]..check all your air fittings/nuts are all tight..while the air comp is running move your hand over the fittings to check for air leaks..sometimes it is hard to hear leaks over the air comp noise..
Craig

[Erick68]

I put this off for several months,still having troubles, I replaced the head gaseket and the assembly valve plate and previously relaced the check valve in the tank and toqued the head bolts to 250 in pounds. Turned it on and when the compressor got up to about 40 psi I noticed air blowing back out of the head out of one of the valves. Do I now need a need a new compressor head?

[cmoorejack]

Hey Eric,
Sorry to hear you are still having problems...are you sure you you reinstalled the valve plate assy correctly? The ports have to align up so they draw and push the air the right way..recheck the parts breakdown to confirm..if it is installed [backward] it will blow air out..also make sure you check all your fittings and allow enough time for the compressor to recharge the tank..[some pumps have a cold start valve in the head that doesn't close until it exceeds 30 to 40 psi..] with the pump running you should feel a suction where your air filter is [check it with the filter removed]..if it is blowing out the plate needs to be turned around to the other side ..
hope this helps and good luck..?!
Craig

[Erick68]

I double checked the plate and ran the compressor without the cylinder head wondering if the compressor was heating up and siezing up, did not appear to be a problem.Put everything back together and started it up again. The air coming out of the top of the head is coming from a 3/16 dia hole in the to cylinder head. It appears that the air may be coming out of the crandcase? Blow by because the rings are not sealing properly?? Not sure why the compress would get up to about 40 psi and tax the motor and stop running.

This thing has got me puzzled.

[cmoorejack]

Hey Eric,
Holy moly..It still sounds like you have a valve problem..you may try to re-install the plate assy the other way..just rotate it so the valves are on the other side of the pump..[180 degrees] just to see what happens.. it wont damage anything and you should see a major change..good or bad.. uh..that's all I got left on this one...
cmoorejack

[faron]

IM having the same trouble as eric68