Product Description
The Toyota TO 00591-31352-81 Pin Weldment is an OEM structural component engineered for use in specified Toyota electric lift truck models. Constructed from SAE 1045 forged steel and manufactured in compliance with AWS D1.1 weld standards, this pin weldment is heat treated to a nominal Rockwell C32 core and finished to a 32 µin Ra surface quality. Designed as a permanent weld attachment, the part delivers reliable structural integrity as part of the lift truck frame assembly. All dimensional and
Specifications
Material & Construction
| Material Specification | SAE 1045 medium-carbon steel |
| Finish/Coating | Uncoated as-welded finish or clear oil per OEM practice |
Mechanical Specifications
| Pin Material | Forged steel per OEM specification |
| Weld Specification | Manual arc weld, compliant with AWS D1.1 |
| Surface Finish | Machined to 32 µin Ra maximum |
Part Numbers
| OEM Part Number | 00591-31352-81 |
| Manufacturer Part Number | TO 00591-31352-81 |
Frequently Asked Questions
Q: What is the TO 00591-31352-81 pin weldment and what does it do?
A: The TO 00591-31352-81 is an OEM structural pin weldment engineered for Toyota electric lift truck frame assemblies. It serves as a permanent weld attachment providing critical structural integrity in the lift truck chassis or mast support structure.
Q: What are the material specifications and weld standards?
A: This pin weldment is constructed from SAE 1045 medium-carbon forged steel, manufactured to OEM specification. The weld is manual arc welded and compliant with AWS D1.1 weld standards. The part is heat treated to a nominal Rockwell C32 core and machined to 32 microinch Ra maximum surface finish for optimal fit and durability.
Q: Which Toyota lift truck models use the TO 00591-31352-81?
A: This pin weldment is designed for specified Toyota electric lift truck models. The part number references specific model years and frame designs. Verify your equipment model and serial range against Toyota OEM documentation before ordering to ensure compatibility.
Q: Why is the Rockwell C32 hardness specification important?
A: The Rockwell C32 heat treat specification provides optimal balance between strength and toughness. This hardness resists deformation under heavy repetitive loading while maintaining enough ductility to prevent brittle fracture in high-impact scenarios typical of lift truck operation.
Q: What maintenance or inspection is required for this component?
A: As a permanent weld-attached structural component, this pin weldment requires regular visual inspection for crack initiation, corrosion, or signs of fatigue. Check for surface rust, corrosion penetration, or visible cracks in the weld zone. Replace if cracks develop or if equipment frame exhibits misalignment or movement that suggests weld failure.
Q: Can this pin weldment be repaired if damaged?
A: As a permanent weld attachment, this component is not field-repairable. If the pin weldment cracks, fractures, or shows signs of weld degradation, the entire assembly must be replaced. Attempting field repair compromises structural integrity and creates a safety hazard under load.