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ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 Warning Compressed air used for cleaning can create airborne particles that may enter the eyes.  Pressure will not exceed 30 psig (207 kPa).  Eye protection required. CAUTION Under  no  circumstances  should  130  psi  (896.4  kPa)  transfer  pump  pressure  be  exceeded,  to prevent damage to the pump. NOTE TABLE 3-4 lists fuel delivery in cubic millimeters/stroke.  Some test benches measure fuel flows in cubic centimeters (milliliters).  To convert from mm3/stroke to CC's, use the following formula: CC's = (mm3/stroke x No.  of strokes)/1000 e. Operate  pump  at  250  pump  rpm  wide  open  throttle  (WOT)  for  ten  minutes.    Completely  dry  pump  off  using compressed air.  Observe for leaks and correct as necessary. CAUTION Never  back  out  low  Idle  screw  or  disengagement  of  throttle  lever  from  guide  bushing  could result. f. Back out high idle screw. g. Refer to TABLE 3-4 for correct sequence of test stand adjustments. h. Pressurize transfer pump inlet from 1.5 to 2.5 psi (10.3 to 17 kPa). i. Close  valve  in  fuel  supply  line.    With  pump  running  200  pump  rpm,  the  transfer  pump  must  be  capable  of creating a vacuum of at least 18 inches (45.7 cm) of mercury.  If it does not, check for air leaks between pump inlet and shutoff valve or deficiency in transfer pump. j. Fill graduates to bleed air from test stand and to wetten graduates. k. Check return oil quantity by directing return oil flow into a calibrated container for a given time.  Refer to TABLE 34 for allowable quantity and pump rpm at which to make the check. CAUTION Under no circumstances should 130 psi (896.4 kPa) transfer pump pressure be exceeded. I. Operate pump at specified speeds with wide open throttle (WOT) and observe transfer pump pressure.  Pressure should be 78 to 80 psi (537.8 to 551.6 kPa).  To adjust pressure, remove lines to transfer pump inlet connector and use a 5/32 inch hex key wrench to adjust pressure regulating spring plug.  Clockwise adjustment increases pressure.  Do no over-adjust. 3-116


 


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