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Figure 3-20.—Synthetic rubber oil seals. | Up
Construction Mechanic Basic Volume 01 - Construction methods and practices | Next
Figure 3-23.—The parts of a piston. |
Piston Assembly
Figure 3-21.—Wick seals.
Pistons (fig. 3-22) are usually made of an aluminum
alloy. They are a sliding fit in the cylinders. This serves
several purposes as follows:
Transmits the force of combustion to the
crankshaft through the connecting rod.
Acts as a guide for the upper end of the
connecting rod.
Serves as a carrier for the piston rings that are
used to seal the compression in the cylinder.
The piston must withstand incredible punishment
under temperature extremes. The following are
Figure 3-22.—Piston.
3-15
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