Product Description
SU S9631 Poly Load Wheel Assembly: 2 x 4 x 1.375 inch polyurethane load wheel with sealed ball bearing, suitable for electric lift truck and pallet jacks. Cross-referenced as SU 9631-A. Built with high-durability poly tread and precision steel core.
Specifications
Material
| Tread Material | Polyurethane, molded |
| Core Material | Machined carbon steel |
| Finish | Natural polyurethane tread, steel core with corrosion inhibitor |
Part Numbers
| Cross-Reference Part Numbers | Replaces SU 9631, SU-9631-A; equivalent to Liftsplus.com SU S9631 |
| Manufacturer Part Number | SU 9631-A |
| OEM Part Number | SU S9631 |
Frequently Asked Questions
Q: What are the wheel dimensions and load capacity of the SU S9631?
A: The SU S9631 is a 2 x 4 x 1.375 inch polyurethane load wheel assembly with a sealed ball bearing. It is designed for use on electric lift trucks and pallet jacks. The polyurethane tread provides durable contact with floor surfaces while the machined carbon steel core ensures structural integrity under load.
Q: Is SU S9631 the same as SU S9631-A?
A: Yes. SU S9631-A is the manufacturer part number and is equivalent to the OEM part number SU S9631. Both SKUs represent the same load wheel assembly and can be used interchangeably. Verify your equipment documentation to confirm which part number your jack requires.
Q: Does the SU S9631 sealed ball bearing require maintenance?
A: The sealed ball bearing in the SU S9631 is maintenance-free under normal operating conditions. The seal prevents dirt and moisture ingress. If the wheel begins to wobble, make noise, or resist rotation, inspect the bearing for damage. Replace the wheel assembly if bearing damage is confirmed; the bearing cannot be serviced separately.
Q: Can the SU S9631 be used in cold storage or wet environments?
A: The SU S9631 uses standard polyurethane tread and is suitable for general warehouse and indoor applications. For extended use in cold storage (below 32 degrees Fahrenheit) or wet floors, consider the SU S9631-EZ, which features a High Traction polyurethane compound designed for those conditions. The standard S9631 may reduce grip and accelerate wear in those environments.
Q: How do you install the SU S9631 load wheel assembly?
A: Installation is plug-and-play on compatible jacks. Remove the axle bolt or pin that secures the old wheel. Slide the SU S9631 wheel onto the axle, ensuring the bearing bore aligns with the axle. Reinstall and tighten the axle fastener to manufacturer specifications. Do not overtighten, as this can bind the bearing. Verify smooth rotation before placing the jack back in service.
Q: What wear indicators suggest the SU S9631 needs replacement?
A: Replace the SU S9631 when you observe flat spots, cracks, or chunks missing from the polyurethane tread; excessive wobble during load transfer; grinding or noise from the bearing; or visibly reduced tread depth that compromises floor grip. Worn wheels increase stopping distance and reduce jack stability under load.