TM  10-3920-638-24&P 3-5. ENGINE MAINTENANCE (cont) a. Engine Tune-up (cont). (3)  Fuel  Injection  Pump  Adjustments  (cont). STEP LOCATION ITEM ACTION REMARKS ENGINE IDLE SPEED ADJUSTMENT (cont) 2 e. Idle speed screw Cut and remove (cont) wire seal f. Lock nut Loosen g. Idle speed screw Adjust Adjust 1/2 turn at a time and recheck engine idle speed. Repeat until engine idles at 825-850 RPM NOTE Turn idle speed screw out (counterclockwise) to decrease engine speed.  Turn  idle  speed  screw  in  (clockwise)  to  increase  engine idle  speed. h. Lock nut Tighten While  holding  idle  speed  screw i. New wire seal Install and seal On idle speed screw ENGINE  NO-LOAD  GOVERNED  SPEED  ADJUSTMENT 3 Fuel  injection a. High speed screw Check Check if high speed screw is against the pump injection pump boss while an assistant fully  depresses  the  accelerator  pedal.  If screw  is  not  against  pump  boss,  adjust accelerator  cable  ball  joint  (para  2-15i) b. Engine Warm-up Start engine and operate until normal operating temperature is reached 3-36