TM 10-3930-664-24 NOTE Fuel   pump   may   rotate   slightly   during shaft  nut  installation.    Slight  rotation  is acceptable  as  long  as  pump  is  free  to move   on   flange   slots   and   crankshaft does not move. 4. Install nut (20) and washer (21) onto fuel pump shaft (22).  Torque nut to 11-15 ft-lbs (15-20 N•m). 5. Align fuel pump (4) as follows: a.    If reinstalling original fuel pump (4),  rotate pump to align scribe marks. b.    If installing a new or rebuilt fuel pump  (4) without scribe marks, take up gear lash by rotating pump against  direction  of  drive  rotation.  Mark  pump flange to  match mark on gear housing. 6. Torque nuts (23) to 18 ft-lbs (24 N•m). 7. Loosen  lockscrew  (7).  Position special washer (8) behind lockscrew head as shown in figure.  Torque lockscrew to 15 ft-lbs (20 N•m). 8. Disengage timing pin. 3-66