Question about Senco PC2001 2 HP 4 Gallon Electric Hand Carry Air Compressor

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Compressor runs until overload release valve opens (pressure at 130 psi) and then air escapes until pressure lowers to 100 psi..Then motor begins to restart, but will not , due to 100 psi and kicks breaker if allowed to stay On... Adjustment nuts do not make any difference.... Motor will restart fine when pressure is below 80 psi.. Thanks for any suggestions.. Len

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There is a check valve between the compressor and tank, and there is also an 'unloader valve' which blows the pressure off the compressor so that it starts under little load. I think your check valve is stuck open and the unloader valve is blowing tank pressure off.. and when the compressor tries to start it's starting against the pressure in the tank.

So check/replace/thaw the check valve and you'll be good to go. It's generally at the tank where the line from the compressor head goes into the tank, it'll be between the two somewhere.

lp

Posted on Jan 02, 2011

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http://www.toolpartsdirect.com/makita-mac5200-3-0-hp-air-compressor.html
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How to reset the compressor


  1. Remove the screws from the plastic shroud on top of the compressor near the air outlet valve. Use a screwdriver to remove the screws. Lift the shroud from the compressor to reveal the upper and lower pressure limiter adjustment screws. The screw closest to you is the lower, the one farthest away is the upper.
  2. Turn the compressor on and allow it to charge. Make a note of the pressure on the pressure gauge when the compressor turns off. Pull the air release valve to release pressure from the tank. Look for a metal and plastic valve near the air outlet with a metal pull ring through it. Watch the pressure gauge and make a note of the point at which the compressor turns back on.
  3. Consult the tool manual or tool manufacturer's website for the tool you use most often. Look for the optimum pressure range. You may also find this on a printed label on the tool itself. It should indicate the best pressure for operating the tool, for example, "Works best @ 60-120 psi." Psi, which stands for pounds per square inch, is the same measurement you wrote down from the pressure gauge.
  4. Adjust the lower limiter control screw by turning it clockwise to increase the pressure, or counterclockwise to decrease it. Adjust the upper limiter control screw in the same way. Recharge the compressor, noting when it kicks off. Release pressure and note when it kicks on. Adjust the screws as needed until the compressor consistently maintains optimum pressure.
  5. Replace the shroud on the compressor. Replace the shroud screws and tighten them with a screwdriver.

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Hi, my name is John. Welcome to FixYa. Look on the pressure switch and see what the max. is. I have some notes here I will have to locate them and I will post them here if you still having problems, but it sounds like you need to replace the pressure switch. Thanks for choosing FixYa...John

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