Product Description
SU S9131-A Polyurethane Load Wheel Assembly for electric lift trucks, compatible with Superior XL platforms; features 8-inch diameter, 4-inch tread width, 97A durometer poly, steel core, and pre-installed sealed bearings. Bonded with XL3 technology for maximum heat and shear endurance. Designed for high-duty-cycle industrial use and direct replacement mounting.
Specifications: 8.000 inch diameter x 4.000 inch width (8.000" x 4.000" | 8 x 4 wheel | 8 x 4 | 203.20mm x 101.60mm)
Specifications
Material & Construction
| Polyurethane Specification | Proprietary American-formulated XL3 polyurethane |
| Core Finish | CNC-machined with anti-corrosion surface treatment |
Part Numbers
| OEM Part Number | SU S9131-A |
| Manufacturer Part Number | SU S9131-A |
| Cross-Reference Part Numbers | Replaces SU S9131-XL, SU9131-XL, SU9131XL, 9131XL |
| Equivalent Part Numbers | SU S9131-XL-A, 9131-XL-A |
Wheel Dimensions
| Material | Proprietary American-formulated XL3 polyurethane |
| Outside Diameter | 8 |
| Inside Diameter | 2.56 |
| Width Side to Side | 4 |
| Bore Depth | 0.91 |
| Bore Outside Diameter | 2.8338 |
Frequently Asked Questions
Q: What does SU S9131-A replace and what are its cross-reference part numbers?
A: The SU S9131-A replaces the SU S9131-XL variant and is equivalent to part numbers SU S9131-XL-A, 9131-XL-A, SUS9131-XL, SUS9131XL, and 9131XL. Always verify the old part number on your truck before ordering to ensure fitment compatibility.
Q: Does the SU S9131-A come with pre-installed bearings and are they sealed?
A: Yes, the SU S9131-A includes pre-installed sealed bearings, making it a complete plug-and-play assembly. The sealed bearing design eliminates the need for repacking and maintenance. Simply mount to the axle using the original fasteners. Do not attempt to disassemble bearings.
Q: What is the installation procedure for the SU S9131-A on a Superior XL platform truck?
A: Remove the axle pin or cotter pin from the old assembly. Slide the old wheel off the axle. Position the SU S9131-A and slide it onto the axle until fully seated. Reinstall the axle pin or fastener, ensuring the wheel spins freely without axial play. Do not grease sealed bearings. Check for smooth rotation before truck operation.
Q: What is the expected lifespan and failure indicators for the SU S9131-A?
A: Under normal heavy-duty use, expect 3-5 years service life. Watch for grinding noise during rotation, vibration during travel, flat spots or chunks missing from the tread, or visible cracks in the polyurethane. Once bearings fail (indicated by grinding or lock-up), the assembly must be replaced. Continued operation with failed bearings damages the axle.
Q: Can the SU S9131-A be interchanged with SU S9131-XL wheels on mixed truck fleets?
A: Yes, the SU S9131-A is the modern equivalent of SU S9131-XL and shares the same 8x4 dimensions. Both have sealed bearings and XL3 bonding. Cross-compatibility exists across Superior XL platform models, but always verify axle diameter and serial range match. Mixed wheels on the same truck are acceptable if all wheels match diameter.
