Unit 2 Construction of Internal
In the preceding chapter, you learned how the internal combustion
engine operates. You also learned how the basic moving parts of an
engine move in a timed relationship to one another during engine
This lesson provides information on the many stationary and moving
parts of an internal combustion engine. As a CM, you should be concerned
with how these parts are made, what materials they are made of, and
their relationship to one another for smooth and efficient operation of
an internal combustion engine.
The information provided is to help you diagnose malfunctions of an
engine and ways to correct them. Since the gasoline and diesel engines
used in construction equipment of today are basically the same
internally, the majority of information provided applies to both.
In this unit you learn to recognize the differences in the types, the
cylinder arrangements, and the valve arrangements of internal combustion
2-1 Engine Construction
Learning Objectives: Recognize operating principles and functions of
stationary and moving parts within an internal combustion engine.
Describe techniques used in valve reconditioning and timing gear
2-2 Engine Adjustment and Testing
Learning Objectives: Describe the techniques used in adjusting
engine valves. Recognize basic engine testing procedures and