A heads up for victims of pump failure...............I found the Banjo orifice plugged, and here's how I found it.
I Replaced my old pump today with the new style pump. Turned on the electric pump to check for leaks and the pressure went to 2.1 psig. But was puzzled when I turn the pump off because the pressure stayed at 2.1 psig and would not bleed down. I started the engine and with both pumps "on" the pressure climbed to 4.7 psig and would not bleed down when I killed the engine and the electric pump. I concluded that I had a stuck pressure transmitter. Upon loosening the line to the sensor however fuel sprayed out indicating that I did have pressure on the line. The pressure sensor on the Dynon dropped to 0.0 psig. I removed the banjo fitting from the return line and found debris wedged into the hole. I cleaned the orifice and all works well now. Apparently when the last pump failed it discharged material from the diaphram that stopped up the orifice. Thought I give a heads up if someone else encounters the problem in the future / might save someone from ordering a new pressure transmitter.
Happy flying
Gary Eldridge
I Replaced my old pump today with the new style pump. Turned on the electric pump to check for leaks and the pressure went to 2.1 psig. But was puzzled when I turn the pump off because the pressure stayed at 2.1 psig and would not bleed down. I started the engine and with both pumps "on" the pressure climbed to 4.7 psig and would not bleed down when I killed the engine and the electric pump. I concluded that I had a stuck pressure transmitter. Upon loosening the line to the sensor however fuel sprayed out indicating that I did have pressure on the line. The pressure sensor on the Dynon dropped to 0.0 psig. I removed the banjo fitting from the return line and found debris wedged into the hole. I cleaned the orifice and all works well now. Apparently when the last pump failed it discharged material from the diaphram that stopped up the orifice. Thought I give a heads up if someone else encounters the problem in the future / might save someone from ordering a new pressure transmitter.
Happy flying
Gary Eldridge