Product Description
Heavy-duty high resilience polyurethane load wheel assembly, manufacturer part number SU 9166-A, for electric lift truck applications. Features pre-installed sealed ball bearings, industry-standard hub, and steel core construction. Engineered for pallet truck load wheel replacement and high-cycle warehouse use.
Specifications
Material & Construction
| Wheel Material | High resilience polyurethane tread over precision machined steel center |
| Center Material | Machined carbon steel core |
Part Numbers
| Manufacturer Part Number | SU 9166-A |
| OEM Part Number | SU 9166-A |
Frequently Asked Questions
Q: What is the difference between SU 9166-A and a drive wheel like SU 9164-XL?
A: SU 9166-A is a load wheel (steer or support wheel), not a drive wheel. Load wheels carry the truck weight and are mounted on the steering axle. Drive wheels move the truck. Load wheels use high resilience polyurethane to absorb shock and reduce vibration. Do not use SU 9166-A as a replacement for drive wheels. Installing the wrong wheel type will cause poor handling and premature failure.
Q: What material is the core of SU 9166-A and why does it matter?
A: SU 9166-A has a machined carbon steel core with high resilience polyurethane tread. The steel core provides structural rigidity under load cycles. Machined precision ensures consistent hub bore and runout, which is critical for load wheel performance. If the core is worn or the bore is enlarged, the wheel will not track true, causing the truck to pull or shimmy.
Q: Does SU 9166-A come with sealed ball bearings pre-installed?
A: Yes. SU 9166-A includes pre-installed sealed ball bearings, making it a ready-to-install assembly. The sealed bearings require no additional lubrication and resist contamination from warehouse dust and moisture. If bearings fail, the assembly should be replaced rather than repaired, as the cost of bearing extraction and installation often exceeds the price of a new wheel.
Q: How do I diagnose a failing SU 9166-A load wheel?
A: Symptoms include steering difficulty, vibration at speed, or a clicking sound during turns. Lift the truck and inspect the wheel for wobble or radial run-out. Spin the wheel by hand and listen for rough bearing noise. Check the tread for flat spots, cracks, or separation from the core. If tread has separated even slightly, do not operate the truck. Replace immediately to prevent wheel failure during operation.
Q: What is the load capacity of SU 9166-A per wheel?
A: The product data provided does not specify the load capacity per wheel. Contact the supplier for the rated load, maximum static load, and dynamic load specifications. Exceeding the rated load will accelerate bearing and tread wear. Always consult the truck manufacturer for total truck load rating and the distribution across all wheels.
Q: Can SU 9166-A be replaced one wheel at a time or must both load wheels be replaced together?
A: Replace both load wheels on the same axle at the same time. Mismatched wheel wear or tread hardness will cause the truck to track unevenly and put stress on the steering linkage. If only one wheel has failed, replace both to maintain balanced handling and extend the life of the steering mechanism.