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low <br /> Troubleshooting . <br /> Your air driven double diaphragm pump has been tested at the factory at 110 psi (7,5bars) for pumping efficiency and suction <br /> lift. Most difficulty in making the pump perform properly is caused by faulty installation. The following chart will help you <br /> isolate the problem and give specific corrective action. Locate the symptom in the left column. We have listed the most com- <br /> mon causes first, so perform the first test for cause on the same line as the symptom. Then proceed with each succeeding test <br /> until the fault has been located. <br /> Possible Cause In <br /> Symptom Order Of Probability Test for Cause Correction <br /> PUMP 1. Air supply is off. 1. Take air supply off pump. Check 1. Turn air supply on. <br /> WILL NOT airflow. <br /> CYCLE <br /> 2. Air supply is inade- 2. Increase air pressure to 100 psi. 2. Use higher air pressure. <br /> quate. (6,8 barn and see if pump cycles. <br /> 3. Air inlet filter may be 3. No test. 3. Remove air supply line. Inside <br /> clogged. the air inlet Is an O-ring and filter <br /> disc. Remove, clean with a solvent <br /> and reinstall. <br /> 4. Pump discharge is 4. Repeatedly turn air supply full on, 4. Remove discharge at pump. 1f <br /> closed or blocked. then full off. When air is turned on, pump cycles, clean out discharge <br /> center section of pump should notice- hoses or discharge valve. <br /> ably move to one side or the other In- <br /> dicating chamber is being pressur- <br /> ized. <br /> 5. Diaphragms ruptured. 5. Check pump discharge. If sub- 5. Replace both diaphragms. <br /> stantial pressured air is in discharge, <br /> diaphragm is ruptured. <br /> 6. One of the following S. Remove muffler. If a large amount 6a. Disconnect air supply, remove <br /> three seals may be dam- of air is leaking, one of the three air valve. See page 7 for air valve <br /> aged: seals listed is damaged. maintenance Instructions. <br /> a. Air Valve lip seals 6 b, and 6c. Disconnect air supply, <br /> b. Diaphragm lip seals remove manifold/elbow assemblies <br /> c. Pilot spoof spacer and diaphragm assembly. See page <br /> 0-rings. 6 for instructions on pilot spool and <br /> diaphragm rod seal maintenance. <br /> 7. Exhaust Icing. 7. Disassemble muffler cap. If muf- 7. Add deicer to air supply, such <br /> fler screen is covered with ice, re- as, ethanol (ethyl alcohol). <br /> move and clean. <br /> ERRATIC OR 8. Diaphragm ruptured. 8. Check pump discharge for sub- 8. Replace diaphragm. <br /> UNEVEN stantial pressurized air. <br /> CYCLING g Air trapped in outer 9. Fully open discharge to cause 9. Periodically open-discharge valve <br /> chamber with discharge pump to stroke rapidly several cy- to remove entrapped air. <br /> 80% closed. cles. <br /> PREMATURE 10. Abrasive particles in 10. Reduce air pressure or reduce 10. Operate pump at a lower air <br /> RUPTURE OF fluid are cutting through di- the flow rate using a valve. Monitor pressure or slower speed. <br /> DIAPHRAGMS aphragms. diaphragm wear. <br /> LEAKAGE AT 11. Air pressure is too 11. Rotate band clamps and reduce 11. Operate pump at lower air pres- <br /> THE BAND high (condition appears air pressure. Check to see if pump sures. <br /> CLAMP most often at elevated continues to leak. <br /> temperatures). <br /> Page 3 Z48 0257aQ <br />