Which of the following components is NOT included in the 15-gpm hydraulic circuit?

The hydraulic circuit designed for a 15-gpm system is specifically configured to optimize performance and ensure the safe operation of cranes and similar machinery. Among the components listed, the hydraulic swivel is typically not included in a basic hydraulic circuit for this flow rate.

The hydraulic swivel is used to allow for rotation in systems where hoses could become twisted or kinked, which is more common in larger or more complex hydraulic applications. In a 15-gpm circuit, the focus is generally on essential components like the priority valve, which directs hydraulic flow where it is needed most, outriggers for stability, and relief valves to prevent overpressure conditions. These components are critical for maintaining operational integrity and safety.

While hydraulic swivels offer added flexibility in certain applications, their absence from the circuit does not hinder the fundamental functionality required at the specified flow rate. Understanding this helps in recognizing how basic hydraulic systems are designed for efficiency and reliability, particularly when specific components are not necessary for the intended operation.