GASKET 4990368 - Caterpillar

Illustration 1 g01960893
Location of the timing hole (left side of the flywheel housing) (1) Timing indicator (2) Inspection plug
Remove inspection plug (2) that is on the left side of the flywheel housing.
Install the timing light on the engine.
Connect the power leads to the terminals to battery power.
Connect the magnetic pickup lead around the spark plug wire that is for the No. 1 cylinder.
Start the engine. Allow the engine to run at the high engine idle.
Use the timing light to check the actual ignition timing for the engine. Ensure that the actual ignition timing matches the timing that is programmed for First Desired Timing.If the actual ignition timing does not match First Desired Timing, reprogram the parameter for Desired Engine Timing Offset in order to adjust the actual ignition timing for the engine.The timing calibration is complete when the timing at the flywheel matches the ignition timing that is specified from the performance data sheet.
Restore the engine to the original configuration. Place the engine into service.