TM 10-3930-659-34 4-34. TRANSMISSION SYSTEM PRESSURE CHECK (Con’t). 3. Install hose (5) and pressure gage (6) on quick coupler (2). 4. Warm hydraulic system to operating temperature (see paragraph 2-28). 5. Move transmission direction selector lever to N (Neutral) and run engine at 1500 rpm.  Note pressure reading on pressure  gage  (6).    Pressure  gage  must  read  213-242  psi  (1469-1669  kPa).    If  pressure  reading  is  within specification, go to step 9. 6. Move  transmission  direction  selector  leverto  F  (Forward)  a  ,d  move  transmission  speed  range  selector  leverto several different gear ranges (see TM 10-3930-659-10).  Note if pressure reading increases to within specification in any gear range. 7. Move  transmission  direction  selector  leverto  R  (Reverse)  and  move  transmission  speed  range  selector  leverto several different gear ranges (see TM 10-3930-659-10).  Note if pressure reading increases to within specification in any gear range. 8. If pressure reading is still below minimum specification, replace pressure regulator (see paragraph 4-39). 9. Remove hose (5) and pressure gage (6) from quick coupler (2). 4-144