Product Description
O-RING
Frequently Asked Questions
Q: What is the HY 39381 o-ring used for on Hyster electric lift trucks?
A: The HY 39381 is an OEM o-ring seal for Hyster electric lift trucks. It is used in hydraulic and pneumatic assemblies to create fluid-tight seals at connection points. This part prevents leakage of hydraulic fluid or pressurized gas in various truck components.
Q: What material is the HY 39381 o-ring made from?
A: Hyster OEM o-rings are typically manufactured from NBR (nitrile rubber) or FKM (fluorocarbon) elastomer compounds. NBR is standard for general hydraulic systems, while FKM offers superior resistance to high temperatures and aggressive fluids. Verify material specification for your application before ordering.
Q: How long does an HY 39381 o-ring typically last before replacement is needed?
A: O-ring lifespan depends on operating conditions, fluid type, temperature, and pressure. In normal electric lift truck service, o-rings typically remain functional for 3-5 years. Premature failure occurs if the truck operates in extreme cold storage, high temperatures, or with contaminated hydraulic fluid. Replace immediately if leakage appears at sealed connection points.
Q: Will the HY 39381 o-ring work on non-Hyster lift trucks?
A: The HY 39381 is an OEM Hyster part designed for Hyster equipment. Cross-compatibility depends on matching inside diameter, outside diameter, and thickness specifications. Before ordering for Crown, Toyota, Raymond, or other brands, confirm your equipment dimensions match the HY 39381 specifications. Measure the groove cavity width and o-ring groove depth to ensure proper fit.
Q: What inspection should be done before installing a replacement o-ring?
A: Inspect the o-ring groove for cracks, debris, or fluid residue. Clean the groove with appropriate cleaner if contaminated. Check the groove dimensions to confirm the HY 39381 fits correctly. Verify the mating part surfaces are not damaged, scratched, or worn. A damaged groove requires replacement of the component, not just the o-ring.