TO 00591-76089-81

Frequently Asked Questions

Q: What are the specifications of the TO 00591-76089-81 lock washer?
A: The TO 00591-76089-81 is a Toyota OEM lock washer manufactured from hardened spring steel. Lock washers are designed to resist vibration loosening by providing continuous spring tension on fasteners in dynamic applications such as wheel assemblies and structural fastening on electric lift trucks.

Q: Which Toyota electric lift truck models use this lock washer?
A: The TO 00591-76089-81 lock washer is compatible with various Toyota electric lift truck models including platform trucks and stackers in the 8-series family. Verify your specific equipment model against Toyota documentation to confirm fitment with your wheel assembly or fastening application.

Q: Why is spring steel used for this lock washer?
A: Hardened spring steel provides elastic deformation and memory, which creates consistent clamping force even as fasteners experience vibration and thermal cycling. This material composition resists permanent set degradation over extended service life, making it ideal for high-vibration equipment like electric lift trucks.

Q: How does this lock washer prevent fastener loosening?
A: The TO 00591-76089-81 lock washer uses spring tension to maintain pressure on fasteners during equipment operation. As the fastener attempts to back out due to vibration, the spring steel resists the motion and provides constant resistive force, significantly reducing the risk of fastener loss in material handling operations.

Q: What is the expected service life of this lock washer?
A: Under normal electric lift truck operating conditions, the TO 00591-76089-81 lock washer can provide 3-5 years of service life before spring characteristics degrade. Inspect lock washers annually for permanent deformation or loss of tension. Replace whenever fasteners show signs of rotational movement or if maintenance logs indicate extended equipment age.

Q: Are there equivalent cross-reference part numbers?
A: No cross-reference part numbers are available for TO 00591-76089-81. This is a Toyota OEM-specific lock washer. Substitute washers must match the spring steel material, hardness specification, and inner and outer diameter dimensions to provide equivalent vibration resistance.