Product Description
O/H PACKING KIT
Frequently Asked Questions
Q: What components are included in the 00591-04378-81 O/H Packing Kit?
A: The 00591-04378-81 is a packing kit designed for overhead lift truck hydraulic systems. It contains replacement seals and packing materials for pump and cylinder maintenance. Confirm your specific lift truck model and serial range before ordering to ensure you receive the correct seal configuration and material grades for your application.
Q: Which electric lift truck models use the 00591-04378-81 packing kit?
A: This kit fits multiple OEM electric lift truck brands including Crown, Toyota, Raymond, Jungheinrich, and similar models from that era. Verify your truck model, year, and serial number range against the specification sheet before purchasing. Do not assume compatibility based on brand alone, as hydraulic configurations vary across production years.
Q: What is the typical lifespan of seals from the 00591-04378-81 kit?
A: Seal lifespan depends on operating conditions, load cycles, and fluid cleanliness. In standard warehouse operations, expect 3 to 5 years before replacement becomes necessary. Wet or cold storage environments, frequent load extremes, or contaminated hydraulic fluid will accelerate wear. Inspect seals annually during routine maintenance to catch degradation early.
Q: Can the 00591-04378-81 kit be installed without equipment downtime?
A: Installation typically requires draining the hydraulic system and disassembling pump and cylinder components. Plan for 4 to 6 hours of labor depending on your technician experience level and system accessibility. It is not a quick swap; schedule replacement during planned maintenance windows. Improper installation or reuse of old seals will result in leaks and system failure.
Q: What material are the seals in the 00591-04378-81 packing kit?
A: The kit contains nitrile and elastomeric seals rated for standard ISO hydraulic fluid. Verify your hydraulic fluid type matches the seal material compatibility before installation. Do not substitute or mix seal materials from different kits, as this creates pressure leakage risk and will void performance warranties.