How to adjust the valve clearance of excavator engine correctly.

Turn the crankshaft counterclockwise according to the normal rotation direction of the engine until the timing indicator and the scale on the pulley are aligned. Remove the cover of the valve mechanism and check whether all valves of 1 cylinder are closed. If both are closed, this position is the compression top dead center of 1 cylinder. Adjustment of valve clearance: Before checking or adjusting the valve, tap the valve rocker arm with a soft hammer to ensure that the stem of the valve lifter is close to the base circle of the camshaft. The sequence of valve inspection and adjustment is as follows: