TM 9-2815-225-34&P 3-63.  FUEL PUMP TESTING AND CALIBRATION (Contd) LOCATION/ITEM ACTION REMARKS d.  Fuel Pump Run-in (Big Cam I and Big Cam III) Contd) 47. Fuel pump assembly (71) Run at 500 rpm for five This step is done to purge all air minutes. from the system.  The gear pump (47) must be able to pick up fluid at this speed without the aid of priming.  If no fluid pickup is indi- cated in the flowmeter glass tube (38), check the fuel filter screen (46) for proper installation; check that the test stand motor switch is set to the correct position; check that the test stand suction control valve is open; and check all hose connections and gear pump (47) for condition. e.  Fuel Pump Vacuum and Seal 48. Case fill plug (44) a.  Remove from fuel pump main housing (51). b.  Look on fuel pump main housing (51) and make sure fuel is present. c.  Install plug (44) on main housing (51). 49. Fuel pump assembly (71) Check mating surfaces and Replace seals as required. weep hole (94) for leaks. 3-484