TM  10-3930-638-24&P 3-6.   FUEL   SYSTEM   MAINTENANCE   (cont) c.  Fuel  Injection  Pump  (cont). STEP LOCATION ITEM ACTION REMARKS INSTALLATION  (cont) 13 Timing  gear a. Drive shaft (15) Install On large hub side of drive gear (14) housing b. Drive gear (14) and Position In timing gear housing. Align timing mark shaft (15) mark on drive gear (14) with timing pointer on idler gear as shown below c. Lock washer (13) and Install  and Tighten nut (12) to 40-50 pounds foot nut (12) tighten torque d. Drive gear (14) Check  backlash Using dial indicator on one tooth of drive gear  (14),  measure  drive  gear-to-idler gear  backlash.  If  backlash  exceeds  0.007 inch, install new drive gear (14) and recheck.  [f  backlash  still  exceeds  0.007 inch, replace idler gear (notify general support  maintenance) e. Spring (11) and thrust Install In bore of drive shaft (15). Make sure plunger (10) plunger (10) is free to move in bore of drive shaft f. Cover plate (8) and Position On  timing  gear  housing new gasket (9) g. Seven cap screws (6) Install  and Tighten to 25-30 pounds foot torque and two nuts (7) tighten 4 Drive shaft (15) Two new seals (5) Install Generously lubricate seals with lubriplate. Install seals on sleeve tool with lips of seals  outward  (seals  back-to-back  as shown below): then slide sleeve tool over drive shaft (15) and position seals in grooves of drive shaft 3-83