When conducting a pre-operation inspection for hydraulic leaks, what is the best practice for checking hydraulic hoses and connections, particularly in cold conditions?

Question: When conducting a pre-operation inspection for hydraulic leaks, what is the best practice for checking hydraulic hoses and connections, particularly in cold conditions?

Answer options:

• Quickly scan connections for large puddles or streams of fluid. ✅ Run the machine for a few minutes to warm up the hydraulic oil, then visually inspect and wipe critical connections with a rag to check for residue.
• Spray soapy water on connections to look for bubbles indicating a leak.
• Assume cold prevents leaks and focus on other inspection points.

Correct answer: Run the machine for a few minutes to warm up the hydraulic oil, then visually inspect and wipe critical connections with a rag to check for residue.

Explanation: Warming the hydraulic system allows the fluid to thin and pressure to build, making minor leaks more apparent. Wiping with a rag helps detect subtle weeping not visible from a distance, as advised by maintenance best practices.