Measures static timing on Cummins J K N NH V-12 N-14 and L-10 series diesel engines With this tool you can determine the injector push tube travel in relation to piston travel Tool is installed with one dial indicator in the injector bore and the other on the injector push tube Turn the engine over manually to find top dead center By checking the gauges you can determine if timing is within factory specifications then make adjustments to the cam followers