How do you effectively identify early signs of wear or damage in a crane's hydraulic system, beyond visible leaks?

Identifying early signs of wear or damage in a crane's hydraulic system beyond visible leaks requires a multi-faceted approach. This includes monitoring hydraulic fluid condition through regular sampling and analysis. Increased particle counts or unusual fluid color indicate internal component wear. Unusual noises, such as whining or squealing from pumps, signify cavitation or component distress. Monitoring system pressure and temperature gauges during operation can reveal inefficiencies or blockages within the system. Slow or erratic cylinder movement suggests internal leakage or valve problems. Finally, inspecting hydraulic hoses for bulging, kinking, or abrasion indicates potential failure points. For instance, hydraulic oil analysis revealing elevated levels of iron could indicate wear in the hydraulic pump, prompting further investigation and potential pump overhaul before catastrophic failure occurs. These non-visual clues, when detected early, allow for proactive maintenance and prevent major hydraulic system failures.