How to adjust the 375 natural gas valve of Yuchai engine

The natural gas valve adjustment steps of Yuchai 375 engine are as follows:

1. First, rotate the crankshaft so that the piston of cylinder 1 is at compression top dead center;

2. For a 6-cylinder engine, first adjust the intake valve and exhaust valve of 1 cylinder, exhaust valves of cylinders 3 and 5, and intake valves of cylinders 2 and 4;

3. Six-cylinder engine: Double-row-no advance means that the intake valve and exhaust valve of 1 cylinder-the exhaust valve of cylinder 5 and cylinder 3-the intake valves of cylinder 2 and cylinder 4 are not adjusted (ignition sequence1-5-3-6 -2-4). In fact, you can see which cam's base circle contacts the rocker arm, so this cam-driven valve is.