F U E L S Y S T E MFINDING TOP CENTER COMPRESSIONPOSITION FOR NO. 1 PISTONTools Needed:5P7307 Engine Turning Tool Group.3/8-16 NC Bolt.No. 1 piston at top center (TC) on the compres-sion stroke is the starting point for all timing pro-cedures.1. Remove the valve cover.2. Remove plug (1).NOTE: The engine is seen from the flywheel endwhen direction of crankshaft rotation is given.3. Remove the starter motor and install 5P7307Engine Turning Tool Group.4. Turn the flywheel clockwise approximately 60°.L O C A T I O N O F P L UG1. Plug.5.6.7.TM 5-3805-258-24-1TESTING AND ADJUSTINGNow turn the flywheel counterclockwise untila 3/8" 16 NC bolt (2) can be put through hole(3) and installed in the timing bolt hole in theflywheel.Look at the valves for No. 1 cylinder (the twovalves at the front of the engine). The intakevalve and exhaust valve for No. 1 cylinder mustbe closed. If they are closed, you will be able tomove both rocker arms up and down by hand.If the intake valve and exhaust valve for No. 1cylinder are not closed, remove bolt (2). Turnthe crankshaft counterclockwise 360° and in-stall bolt (2). Both valves are now closed. Thisis top center (TC) compression position forNo. 1 piston.I N S T A L L I N G B O LT2. Bolt. 3. Hole.NOTE: If the flywheel bolt hole is turned beyondhole (3) and bolt (2) can not be installed, turn theflywheel clockwise approximately 60°. Then, turnit counterclockwise until bolt (2) can be installed.The reason for this step is to be sure the play is re-moved from the timing gears when the engine is puton top center.4-13/4-14 (blank)
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