TM 10-3930-653-14&P (1)  Measuring the oil pressure 1. Warm  up  the  engine  and  measure  the  no-load idling speed and governed max. speed. NOTE Adjust the engine speed if incorrect. Applicable truck model No-load minimum rpm No-load maximum rpm H20PU240 (NISSAN) FG30N7 650 rpm 2950-3080 rpm 2. Block the front and rear of the rear wheels, jack up  the  truck  until  the  front  wheels  rotate  freely and support the underside of the frame securely on a stand. 3. Remove  F  or  R  plug  and  T  plug  on  the  case cover, and install an oil pressure gauge. Refer to Fig. 2-41 and Fig. 2-42. 4. The   pressure   gauges   used   for   measuring   oil pressure are as follows. Clutch oil pressure: Max. graduation 20 kg/cm² Torque converter oil pressure: Max.  graduation 10 kg/cm² 5. The oil pressures of the torque converter and the clutch must be measured at the specified engine speed    after    running    the    engine    for    a    few minutes. P  port  is  provided  on  the  valve  to  measure  the charging pump oil pressure before the oil enters the selector valve.  This port can also be used to measure the clutch oil pressure when the gears are in neutral but if this is done head loss caused by clutch leakage cannot be distinguished. 6. The   oil   pressure   must   be   checked   when   oil temperature is between 70°~90°C. 2.5.5.  STALL TEST 1.  Following items are checked in stall test 1)  Torque converter operation 2)  Engine output 2.  Tools used 1)  Engine tachometer 2)  Chuck 3)  Load nearly rated capacity 3.  Stall test procedure 1)  Warm the torque converter oil up to specified temperature. 2)  Check governed engine rpm. 3)  Pick up the load. 4)  Place wheel stoppers under the drive wheels. 4-148