Product Description
SU 629-XL-A Load Wheel Assembly is a heavy-duty, aftermarket polyurethane (97A) load wheel designed for Superior electric lift trucks, compatible with original equipment. Cross-referenced part numbers include SU629-XL, SU629XL, 629XL, and SUS629XLA. Technical specifications include polyurethane XL material with XL3™ bonding technology for demanding industrial applications.
Specifications: 3.250 inch diameter x 5.937 inch width (3.250" x 5.937" | 3.25 x 5.94 wheel | 3-1/4 x 5.937 | 82.55mm x 150.80mm)
Specifications
Material
| Wheel Compound | Polyurethane XL 97A |
| Material Source | American polyurethane technology with proprietary XL3™ bonding |
| Hardness Specification | 97A (Shore scale) |
Part Numbers
| Manufacturer Part Number | SU 629-XL-A |
| Cross-Reference Part Numbers | SU629-XL, SU629XL, 629XL, SUS629XLA (variant formatting, no explicit supersedes or replaces listed) |
Performance
| Duty Cycle Rating | Heavy-duty referenced, no numerical duty cycle |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 5.873 |
| Bore Depth | 0.591 |
| Hub Width | 5.873 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What is the difference between SU 629-XL-A and SU 629-XL?
A: SU 629-XL-A is a pre-assembled wheel and bearing assembly, whereas SU 629-XL may be a wheel-only component. The -A variant includes the hub, bearings, and wheel mounted and ready to install. This reduces labor time because you simply bolt the assembly onto your truck. If you do not have bearing installation tools or expertise, the -A assembly is faster and reduces installation error. Both use identical polyurethane XL compound and XL3 bonding.
Q: Are SU 629-XL and SU 629-XL-A interchangeable part numbers?
A: No, they are not fully interchangeable because SU 629-XL-A is an assembly and SU 629-XL is a wheel component. However, they are cross-referenced under the same family (629XL, SUS629XLA). When ordering replacements, verify whether your truck requires a wheel-only replacement or a complete assembly. Check your truck manual and damaged wheel configuration. Ordering the wrong type delays repairs and wastes inventory.
Q: Does SU 629-XL-A come with bearings pre-installed and lubricated?
A: Yes, the -A assembly includes bearings pre-installed in the hub. Bearings are typically pre-lubricated at the factory. Before installation, inspect the hub bore for dirt or damage. Do not over-lubricate; excess grease attracts debris and increases drag. If the assembly has been stored longer than six months, rotate the wheel by hand to distribute bearing grease. Replace bearings during routine maintenance every 24 to 36 months, depending on usage intensity.
Q: What is the Durometer hardness of the SU 629-XL-A polyurethane compound?
A: The SU 629-XL-A uses polyurethane XL 97A hardness (Shore A scale). This hardness balances grip and durability for indoor warehouse and light manufacturing environments. Higher hardness (100A+) wheels are stiffer and longer-lasting but provide less grip on smooth floors. Lower hardness wheels grip better but wear faster. The 97A rating is optimized for Standard electric lift trucks running 8 to 16 hours per day.
Q: Can I replace just the polyurethane on a damaged SU 629-XL-A assembly?
A: No, the SU 629-XL-A assembly is not field-serviceable. The polyurethane is bonded to the hub with XL3 adhesive, which cannot be removed without damaging the hub and bearings. Attempting to remove or replace the rubber voids warranty and creates safety hazards. Replace the entire assembly. After removal, send the old assembly to the manufacturer for core credit if available. This is more cost-effective than attempting field repair.
Q: What tools and torque values do I need to install SU 629-XL-A on my truck?
A: Installation requires a socket wrench, jack and jack stands, and wheel blocks. The fastener torque value depends on your truck model and axle design. Consult your truck operator or service manual for the correct fastener size and torque specification (typically 45 to 65 foot-pounds for lift truck wheel bolts). Over-tightening strips bolts and cracks hubs; under-tightening causes wheel wobble and bearing failure. Always check torque with a calibrated torque wrench after 5 hours of operation.