TM 9-2815-225-34&P 3-63.  FUEL PUMP TESTING AND CALIBRATION (Contd) LOCATION/ITEM ACTION REMARKS h.  Throttle Leakage (Contd) 66. Throttle lever (48) Move to full fuel position, and Count "ON" light (16) press start count button (15) to should light up. start the fuel count. 67. Dumping lever (5) Push in when No. 1 burette (6) By operating count selector for is full to dump fuel collected. one cycle before measuring fuel flow, the inside of the burette will be wet.  This makes a more accurate reading possible. 68. Count selector switch (17) Turn to "1000" position. CAUTION Do not hold the fuel pump throttle lever in the idle position any longer than necessary to complete the tests.  The pump may overheat since fuel flow is used to cool and lubricate the pump. 69. Throttle lever (48) a.  Move to idle position until Allow No. 1 burette (6) to fill. pressure gauge (8) stabilizes at lowest reading. b.  Press start count button (15). 3-494