Product Description
Toyota OEM load wheel axle, part number 00591-52316-81, designed for electric lift truck applications. Manufactured from SAE 1045 case hardened carbon steel with a phosphate finish. Supersedes part 00591-53115-81 and interchangeable with Crown 370046 and Yale DS223474 for compatible pallet trucks. Provides axial support for load wheels; features nominal 0.75 inch shaft diameter and 3.25 inch overall length. OEM torque specification for mounting is 45 ft-lbs.
Specifications
Material & Construction
| Axle Material | Case hardened carbon steel, SAE 1045 |
| Hardness | Rockwell C45 minimum |
| Finish | OEM phosphate surface treatment |
Part Numbers
| OEM Part Number | 00591-52316-81 |
| Cross-Reference Part Numbers | Toyota 00591-53115-81; Crown 370046; Yale DS223474 |
| Supersedes/Replaces | Supersedes Toyota 00591-53115-81 |
| Equivalent Part Numbers | Interchange: Crown 370046; Yale DS223474 |
Performance
| Service Factor | Design factor 1.15, continuous load |
Frequently Asked Questions
Q: What are the dimensions and material of the TO 00591-52316-81 axle?
A: The TO 00591-52316-81 load wheel axle features a 0.75 inch shaft diameter and 3.25 inch overall length. The axle is manufactured from SAE 1045 case hardened carbon steel with a phosphate finish. Case hardening provides superior wear resistance and durability for load-bearing applications in electric lift trucks.
Q: What are the cross-reference and equivalent part numbers for this axle?
A: The TO 00591-52316-81 supersedes the older Toyota part number 00591-53115-81. This axle is interchangeable with Crown 370046 and Yale DS223474 for compatible lift truck models. Verify that your equipment model matches these cross-references before ordering to ensure proper fit.
Q: What is the proper torque specification for mounting this axle?
A: The OEM torque specification for the TO 00591-52316-81 is 45 foot-pounds. Proper torque ensures secure load wheel mounting without overtightening, which could damage the shaft or bearing surfaces. Use a calibrated torque wrench when assembling this component.
Q: Why is case hardening important for this load wheel axle?
A: Case hardening creates a hard outer surface on the SAE 1045 carbon steel shaft while maintaining a tough, ductile core. This combination provides excellent resistance to wear from load wheel rotation and bearing contact, extends axle service life, and prevents shaft deformation under heavy loads. The phosphate finish adds corrosion protection.
Q: Will this axle fit Crown and Yale lift trucks with the equivalent part numbers?
A: The TO 00591-52316-81 is mechanically equivalent to Crown 370046 and Yale DS223474 based on shaft diameter, length, and material specifications. However, verify mounting flange configuration and bearing bore dimensions on your specific equipment model before ordering. Dimensional compatibility does not guarantee mounting bracket fit.
Q: How often does this load wheel axle require replacement?
A: Under normal operating conditions, the case hardened SAE 1045 steel axle is a long-life component. Replacement is necessary only if the shaft bends, spins in the hub, exhibits cracks, or develops excessive wear that prevents load wheel rotation. Proper load handling and equipment maintenance significantly extend axle lifespan.