Which of the following is NOT listed as a quarterly procedure for valve maintenance?

• A. Fluid sampling and analysis
• B. Pressure testing
• C. Component inspection
• D. Fluid level verification

Answer: (D)

Quarterly valve maintenance targets deeper condition and performance checks: assessing contamination in the hydraulic fluid, verifying the system’s ability to hold pressure, and inspecting components for wear or damage. Fluid sampling and analysis helps detect contaminants, moisture, or deterioration in the fluid that could impair performance. Pressure testing confirms that seals and joints maintain the required pressure without leaks, ensuring reliability. Component inspection focuses on wear, corrosion, or damaged parts so they can be serviced before a failure occurs. Fluid level verification, while important for safe and proper operation, is typically performed as a routine daily or shift-level check to ensure the reservoir is at the correct level, rather than as a quarterly in-depth procedure.