Product Description
Oil seal
Frequently Asked Questions
Q: What is the SY39004 oil seal used for in forklift applications?
A: The SY39004 is an oil seal designed to prevent fluid leakage and contamination in forklift hydraulic cylinders, mast assemblies, and transmission components. It maintains proper lubrication levels and protects internal mechanisms from dirt and moisture ingress.
Q: Which forklift brands are compatible with the SY39004 oil seal?
A: This oil seal fits forklifts from Crown, Toyota, Hyster, Raymond, Yale, Linde, Jungheinrich, and similar OEM manufacturers. Verify the bore diameter, rod diameter, and seal thickness match your equipment hydraulic or transmission component before ordering.
Q: What material composition does the SY39004 have?
A: The SY39004 is manufactured with nitrile or similar elastomeric material bonded to a steel garter spring and backup ring. This construction provides fluid resistance, temperature stability, and long-term sealing performance in industrial hydraulic environments.
Q: What is the typical replacement interval for the SY39004 oil seal?
A: Oil seals typically require replacement every 1000-2000 hours of forklift operation or when external fluid leakage is observed. Degradation symptoms include visible oil weeping, loss of hydraulic pressure, or contaminated fluid. Replace seals as part of cylinder or transmission overhaul procedures.