Cummins engine valve adjustment sequence

1, cylinder by cylinder adjustment method:?

The cylinder-by-cylinder adjustment method only needs to rotate each cylinder to be adjusted to the top dead center of the compression stroke of the cylinder, so that the valve clearance of the cylinder can be adjusted. This method needs to find the top dead center of each cylinder compression stroke and remember the power sequence of various engines.

2. Two adjustment methods:?

The twice adjustment method is to adjust all valves on the engine twice. The method has simple operation and high efficiency. No matter how many cylinders there are, they can only be adjusted twice.

Extended data

The valve consists of a valve head and a stem.

The temperature of the valve head is very high, and it also bears the pressure of gas, the force of the valve spring and the inertia force of the transmission assembly. Its lubrication and cooling conditions are poor, which requires the valve to have certain strength, stiffness, heat resistance and wear resistance.

Generally, alloy steel is used for intake valves and heat-resistant alloy is used for exhaust valves.

Sometimes in order to save heat-resistant alloy, the exhaust valve head is made of heat-resistant alloy and the valve stem is made of chromium steel, and then the two are welded.

References:

Baidu encyclopedia-valve clearance adjustment