TM 5-3895-383-24 3116/3126 CRANKSHAFT POSITIONS FOR FUEL TIMING AND VALVE LASH SETTING SAE Standard (Counterclockwise) Rotation Engines As Viewed From The Flywheel End Check/Adjust With No. 1 Piston On TC Compression Stroke* Injectors 3-5-6 Intake Valves 1-2-4 Exhaust Valves 1-3-5 Check/Adjust With No.1 Piston On TC Exhaust Stroke* Injectors 1-4 Intake Valves 3-5-6 Exhaust Valves 2-4-6 Firing Order 1-5-3-6-2-4 *Put   No   1   piston   at   top   center   (TC)   position   and   make identification for the correct stroke.  Make reference to Finding Top   Center   Position   For   No.   1   Piston.      After   top   center position for a particular stroke is found and adjustments are made  for  the  correct  cylinders,  remove  the  timing  bolt  and turn the flywheel counterclockwise 360 degrees.  This will put No. 1 piston at top center (TC) position on the other stroke. Install   the   timing   bolt   in   the   flywheel   and   complete   the adjustments for the cylinders that remain. 3116/3126 Cylinder And Valve Location Injector Synchronization Tools Needed 9U7305 Governor And Fuel System Adjusting 1 Tool Group OR 1U6680 Governor And Fuel System Adjusting Tool Group 1 1U6675 Injector Spring Compressor 1 1U6679 Indicator Group 1 1U6673 Wrench 1 6V6106 Dial Indicator 1 9U5120 Spanner (Solenoid) Wrench 1 NOTE: Tool   Operating   Manual,   NEHS0610   is   included with    the    9U7305    Governor    And    Fuel    System Adjusting  Tool  Group  and  gives  instructions  for the testing and adjusting procedure. NOTE: Either   1U6680   or   9U7305   Governor   And   Fuel Adjusting  Tool  Groups  can  be  used  for  testing and  adjusting.    The  following  procedure  is  used for the 1U6680 Governor and Fuel Adjusting Tool Group. Injector synchronization is the setting of all injector racks to a reference position so each injector gives the same amount of fuel to each cylinder.  This is done by setting each injector rack to  the  same  position  while  the  control  linkage  is  in  a  fixed position (called the synchronizing position). The  control  linkage  is  at  the  synchronizing  position  when  the injector of the No. 1 cylinder is at fuel shutoff.  Since the No. 1 injector   is   the   reference   point   for   the   other   injectors,   no synchronizing adjustment is made to the No. 1 injector. Always synchronize an injector when it has been removed and reinstalled  or  replaced.    If  the  No.  1  injector  is  reinstalled  or replaced, all the injectors must be synchronized. NOTE: This   procedure   includes   steps   to   remove   the rocker arm assemblies for the No. 1 injector and for   the   injector   to   be   checked.      Removing   the rocker arm assemblies provides greater access to the  control  linkage  and  injector  rack.    Checking valve  lash  and  fuel  timing  is  recommended  after the rocker arm assemblies are reinstalled. 6-61