TM 9-2815-225-34&P 3-72.  INJECTION TIMING (Contd) LOCATION/ITEM ACTION REMARKS b.  Injection Timing Cylinder No. CAUTION Injection timing for No. 1 cylinder requires that No. 1 piston be set at TDC.  TDC will occur during  both  compression  stroke  and  exhaust  stroke.    Injection  timing  is  performed  when piston is at TDC on compression stroke. NOTE   Adjustments to injection timing are made by altering thickness of cam follower assembly gaskets.   Injection   timing   may   be   advanced   or   retarded   by   adding   or   removing   cam   follower assembly gaskets.   Use cylinder Nos. 1, 3, and 5 to check injection timing.   Dial indicators used in injection timing must have a total travel of at least 0.25 in. (6.350 mm).   Ensure camshaft is pushed in every time crankshaft is rotated.   Use   only   the   crankshaft   to   rotate   engine.      The   use   of   gears   will   result   in   false measurements.      Gear   lash   must   be   closed   up   in   the   direction   of   normal   rotation (crankshaft rotating clockwise when facing crankshaft front pulley). 2. Two screws (18) Install on threaded holes on front The two screws (18) will be used of crankshaft (17).  See view A. for turning crankshaft (17) to locate TDC (19). 3. Crankshaft (17) Rotate clockwise to TDC (19) TDC can be determined when on compression stroke, using a both rods (9) and (11) start suitable bar between two screws moving upward.  Continue (18).  Refer to view B. rotating until piston follower rod (11) reaches its uppermost travel position.  When TDC (19) is determined, remove two screws (18) and install on locations shown in view A. 4. Piston dial indicator (16) Adjust as follows: and pushrod dial indicator (6) a.  Move both downward until seated on piston follower rod (11) in their fully compressed position. b.  Raise both approximately 0.02 in. (0.508 mm). c.  Lock in place with piston dial indicator setscrew (1) and push- rod dial indicator setscrew (4). 3-568