Quantcast n.  No-Air Screw

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TM 9-2815-225-34&P 3-63.  FUEL PUMP TESTING AND CALIBRATION (Contd) LOCATION/ITEM ACTION REMARKS n.  No-Air Screw 102.   Slow switch (23) and fast Depress and release until pump Throttle lever (48) should be held button (25) speed is 1600 rpm as indicated at full-throttle position.  Air on tachometer (7). pressure reading on pressure gauge (8) should be 0.00 in. Hg. (0 kPa). 103.   Selector valve (36) Ensure it is set to ROTAMETER position. 104.   No-air adjusting screw (111) a.  Loosen locknut (112). and locknut (112) b.  Using no-air adjustment tool Fuel flow of 220 pph must be (113), adjust no-air adjusting screw maintained during this (111) until 39 psi (268 kPa) fuel adjustment.  Reset flow control pressure is indicated on fuel valve (37) as necessary to pressure gauge (2). maintain 220 pph. c.  When proper adjustment has been reached, tighten locknut (112). 105.   Slow switch (23) and stop When all calibration checks button (24) have been completed, slow down test stand (1) to minimum speed, then stop test stand. 3-512


 


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