Which of the following is a sign of hydraulic fluid leaks?

Puddles of fluid under the machine are a clear indication of hydraulic fluid leaks. When hydraulic systems encounter issues, such as worn seals, damaged hoses, or fittings that have come loose, they may begin to lose fluid. This loss manifests as visible puddles on the ground beneath the machinery. Recognizing these puddles is crucial for maintenance and safety, as hydraulic fluid leaks can lead to decreased machinery performance, environmental hazards, and even pose safety risks to operators and nearby personnel.

In contrast, high fluid levels in the reservoir would suggest that there is no leakage, as a fluid leak would typically result in lower fluid levels. Increased machine speed is not directly related to hydraulic fluid leaks; in fact, a leak might cause a drop in machine performance. Lastly, a consistent engine temperature does not indicate the presence of leaks; it reflects the engine's ability to regulate its cooling, which can occur irrespective of the hydraulic system's condition.