If the pressure switch fails to shut off the air compressor at the cut-out pressure setting, the safety valve pops open to relieve the excessive air pressure. The safety valve must be replaced if it leaks or pops open.
The check valve keeps the tank air out of the pump. A failed check valve will cause high air pressure to be applied to the head of the pump preventing the motor from restarting once the tank has been filled. The check valve needs to be replaced if the motor doesn't restart when the tank is full.
When the air compressor stops, the unloader opens to let pump head pressure go down. The unloader should be replaced if it leaks air or doesn't work correctly.
Follow these steps to fix your issue:
Shut off the electricity and drain the air tank
The air compressor's power cord should be unplugged from the wall outlet. To drain the air from the tank, pull the ring on the safety valve.
Disconnect the pressure switch tube
Remove the pressure switch tube from the check valve.
Disconnect the outlet pressure tube
Remove the outlet tube from the check valve.
Remove the check valve
The check valve needs to be removed from the tank.
Install the new check valve
Attach the new check valve to the tank. Align the fitting and tighten the check valve.
Reconnect the outlet tube
The check valve has an outlet tube.
Reconnect the pressure switch tube
The check valve has a pressure switch tube.
The compressor needs to be plugged back in.
You would need the following tools:
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