Product Description
WASHER
Specifications
Product Overview
| Part Number | 00591-04491-81 |
| Product Type | Washer, Plain Steel |
Physical Specifications
| Material | Carbon Steel |
| Finish | Zinc-Plated |
| Function | Load Distribution Under Bolt Head or Nut |
| Fastener Purpose | Prevents Bearing Surface Damage and Clamping Force Concentration |
Compatibility
| Application | Drivetrain, Motor, and Transmission Fastening |
| Compatible Equipment | Toyota and Nichiyu Electric Forklifts, Reach Trucks, Pallet Jacks |
Frequently Asked Questions
Q: What is the Toyota 00591-04491-81 washer used for?
A: The Toyota 00591-04491-81 is an OEM washer for electric lift truck applications. It distributes fastener load across a wider surface area to prevent bearing surfaces from being damaged during bolt or nut assembly in motors, transmissions, and drivetrain components.
Q: Where is this washer installed on electric lift trucks?
A: The 00591-04491-81 is used in electric lift truck drivetrain, motor, and transmission assemblies. It functions as a load-distribution component under bolt heads or nuts in structural fastening applications. Exact installation location varies by truck model.
Q: What material is this washer made from?
A: The 00591-04491-81 is manufactured from steel stock appropriate for heavy-duty material handling. It provides corrosion resistance and structural support under clamping forces typical in lift truck electric motor and drivetrain assemblies.
Q: Can you install this washer under any fastener size?
A: No, the 00591-04491-81 is engineered for a specific bolt or stud size. Always verify the fastener diameter before installation. Using an incorrect washer size will not provide adequate load distribution and may allow fastener looseness.
Q: What happens if the washer is missing or damaged?
A: A missing or damaged washer concentrates clamping force into a point load, causing fretting corrosion, fastener looseness, and potential separation of drivetrain or motor components. Always replace damaged washers during reassembly.