TM10-3930-660-20 5-4. FUEL  TRANSFER  PUMP-  REPLACE/TEST  (Cont’d) TESTING OF TRANSFER PUMP PRESSURE AND  FLOW 1. 2. 3. PLACE AUXILIARY FUEL SHUT-OFF SWITCH IN “OFF” POSITION, TM10-3930-660-10. REMOVE FUEL LINE (4) FROM TRANSFER PUMP (3). TEST TRANSFER PUMP (3) FOR ADEQUATE VOLUME  . a. b. c. Connect test hose to pump (3) at port where fuel line (4) was removed. Position end of test hose in suitable container. Crank engine for thirty seconds. Transfer pump (3) should produce at least 0.7 U.S. quart of fuel in container during step 3c. If  fuel volume is too low, pump (3) should be replaced. Refer to removal and installation sections of this paragraph. d. Remove test hose from transfer pump  (3). 4. TEST TRANSFER PUMP (3) FOR ADEQUATE PRESSURE . a. Connect pressure gauge to transfer pump (3) at port where fuel line (4) was removed. b. Crank engine and observe reading on gauge. Transfer pump (3) should provide between 3 to 5 psi when engine is cranked. If fuel pressure is too low, transfer pump (3)  should  be  replaced.  Refer  to removal and installation sections of this  paragraph. 5. 6. 7. c. Remove pressure gauge from transfer  pump  (3). INSTALL FUEL LINE (4) TO TRANSFER PUMP (3). BLEED FUEL LINE (4). REFER TO STEP 7 OF “INSTALLATION” SECTION IN THIS PARAGRAPH . PLACE AUXILIARY FUEL SHUT-OFF SWITCH IN “ON” POSITION, TM10-3930-660-10. 5-6

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