Product Description
Relief valve spring
Frequently Asked Questions
Q: What is the YL 518818817 relief valve spring used for?
A: The YL 518818817 is a relief valve spring designed for Yale electric lift truck hydraulic assemblies. It functions as a pressure-regulating component within the relief valve system to maintain proper hydraulic fluid pressure and protect the system from overpressure conditions.
Q: Which Yale electric lift truck models are compatible with the YL 518818817?
A: The YL 518818817 is an OEM component for Yale electric lift truck hydraulic systems. Verify your specific model and serial range with the hydraulic assembly diagram to confirm compatibility before ordering.
Q: What happens if the relief valve spring becomes weak or fatigued?
A: A fatigued or weak relief valve spring may not maintain proper pressure regulation, resulting in higher-than-normal system pressure, potential hydraulic fluid leakage, or inadequate protection of downstream hydraulic components. Replacement is recommended if pressure testing indicates loss of spring tension.
Q: What is the expected lifespan of the YL 518818817?
A: Relief valve springs typically last several years under normal operating conditions. However, frequency of high-pressure cycles, contaminated hydraulic fluid, and ambient temperature fluctuations can shorten lifespan. Monitor system pressure regularly and replace if performance degrades.