Piston
Marking in zone "a": piston orientation.
1. Aluminum alloy piston.
2. Upper refractory compression ring of trapezoidal cross-section.
3. The lower compression ring is conical in shape!.
4. Oil scraper ring with trapezoidal section spring.
Piston pin
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Note: The piston pins are installed freely in the connecting rod heads and in the pistons and are secured with retaining rings.
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