What are the key parameters to evaluate when inspecting a used piece of construction equipment for potential hydraulic system problems before purchase?

When inspecting a used piece of construction equipment for potential hydraulic system problems before purchase, several key parameters should be evaluated. These parameters provide insight into the condition of the hydraulic system and can help identify potential issues that could lead to costly repairs. First, visually inspect all hydraulic components for leaks. Check hydraulic cylinders, hoses, fittings, pumps, valves, and the hydraulic reservoir for any signs of leakage. Leaks indicate worn seals, damaged components, or loose connections. Second, check the hydraulic fluid level and condition. The fluid level should be within the specified range in the reservoir. The fluid should be....