Quantcast g.  Governor Cutoff RPM Check

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TM 9-2815-225-34&P 3-63.  FUEL PUMP TESTING AND CALIBRATION (Contd) LOCATION/ITEM ACTION REMARKS g.  Governor Cutoff RPM Check 54. Fast button (25) Depress until pump speed is Make sure flow control valve (37) 2100 rpm as indicated on is open and selector valve (36) tachometer (7). is set at the ROTAMETER posi- tion. 55. Flow control valve (37) Adjust to 470 pph. Fuel pump throttle lever (48) should remain in wide-open posi- tion and be secured by a spring. 56. Fast button (25) While watching fuel pressure Pressure should drop when gauge (2), gradually increase reading on tachometer (7) is pump speed until pressure between 2130 and 2150 rpm.  If drops slightly instead of governor cutoff point (as indicated rising. by the tachometer) is not within above limits, do steps 57 through 60.  If governor cutoff point is within limits, go to step 61. 3-488


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