Hydraulic Excavator (HYEX) 12N Practice Test 2026 - Free HYEX 12N Practice Questions and Study Guide

The transmission system is not considered a basic component of a hydraulic excavator. Hydraulic excavators primarily operate using hydraulic power to perform tasks such as digging, lifting, and moving materials. The main components of a hydraulic excavator include the undercarriage, boom, and hydraulic system.

The undercarriage is essential for mobility, providing support and stability for the excavator when it is operating. The boom is a crucial part of the excavator’s arm, extending away from the machine and holding the bucket or other attachment; it is integral to the excavator’s ability to reach and excavate materials. The hydraulic system powers the various functions of the excavator, utilizing hydraulic fluid to create motion and force needed for operations like lifting and digging.

In contrast, while some heavy machinery does incorporate transmissions for transferring engine power, it is not a fundamental aspect of hydraulic excavators, which rely on hydraulics rather than a traditional transmission system to function effectively.