What is the first step you should take before removing a reservoir plug or cap on a PTT assembly?

Before removing a reservoir plug or cap on a Power Trim and Tilt (PTT) assembly, extending the rams all the way out is an important first step. This action ensures that the hydraulic system is at its minimum working state, which prevents a sudden influx of fluid or air that can happen if the rams are not fully extended.

Extending the rams helps to relieve pressure within the system, minimizing the risk of fluid spilling or causing a mess when the reservoir is accessed. It also allows for a more accurate assessment of the fluid level and condition within the reservoir, facilitating better maintenance practices. Taking this precaution is crucial for safe and effective servicing of the hydraulic system.

While disconnecting the battery could be beneficial for safety in certain situations, it is not specifically necessary before servicing the PTT assembly as long as precautions are followed. Draining hydraulic fluid is typically done later in the servicing process when needed, and inspecting for leaks might be a good routine check but does not address the immediate step necessary before removing the reservoir cap.