What should be done first when preparing to shut down a drafting operation?

When preparing to shut down a drafting operation, the first step should be to slowly decrease engine speed to idle. This is an essential practice because it allows the equipment to gradually scale down its operation, helping to ensure a smooth and safe transition to shutdown. A slow decrease in speed facilitates the proper functioning of the engine and associated systems, allowing internal components to cool down naturally and reducing the risk of damage that could occur from abrupt changes in speed or pressure.

Furthermore, maintaining a controlled reduction in speed helps to stabilize any residual water flow and pressure in the system, preventing potential damage to the hoses or fittings that may occur if the engine were stopped suddenly from a high RPM. This methodical approach not only contributes to the longevity of the equipment but also enhances safety for the operator and those nearby.

Other options, such as completely shutting down the engine immediately or leaving it in high gear, do not take these safety and operational considerations into account, which can lead to operational hazards or equipment damage.