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Unit 2 Construction of Internal Combustion Engines

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 operation.

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 engines.

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 installation.

2-2 Engine Adjustment and Testing

Learning Objectives: Describe the techniques used in adjusting engine valves. Recognize basic engine testing procedures and required tools.

David L. Heiserman, Editor

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Revised: June 06, 2015