Red Seal Heavy Duty Equipment Technician Practice Exam

What is the primary function of a filter in hydraulic systems?

1. To increase fluid pressure

2. To remove contaminants from the fluid

3. To cool the hydraulic fluid

4. To monitor fluid levels

The correct answer is: To remove contaminants from the fluid

The primary function of a filter in hydraulic systems is to remove contaminants from the fluid. In hydraulic systems, the fluid must be kept clean to ensure optimal performance and to prevent damage to components such as pumps, valves, and actuators. Contaminants like dirt, metal shavings, and other impurities can cause wear and tear on these components, leading to decreased efficiency, potential failure, and costly repairs. By filtering the hydraulic fluid, the system maintains cleanliness, which results in smoother operation, improved hydraulic efficiency, and prolonged life of the equipment. Regular maintenance and checking of filters are essential tasks in hydraulic system management to ensure that contaminants are effectively removed, keeping the system functioning properly.