Product Description
Load Wheel Assembly
Specifications: 3.250 inch diameter x 3.125 inch width (3.250" x 3.125" | 3.25 x 3.13 wheel | 3-1/4 x 3-1/8 | 82.55mm x 79.38mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 3.125 |
| Tread Profile | 1/4 Radius |
| Bore Depth | 0.968 |
| Hub Width | 3.125 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What does the SU S818-A load wheel assembly include?
A: The SU S818-A is a complete pre-assembled unit that includes the SU S818 Cushothane XL wheel core (3.25 x 3.125 inches, 82.55mm x 79.38mm), sealed tapered roller bearings, retaining rings, and preload spacers. The assembly arrives pre-lubricated and ready to install as a bolt-on replacement. Do not disassemble; if bearings fail, replace the entire assembly.
Q: What is the difference between the SU S818 wheel and the SU S818-A assembly?
A: The SU S818 is the wheel core alone requiring separate bearing installation. The SU S818-A assembly includes pre-fitted sealed bearings and spacers, reducing installation time by 60 percent and eliminating bearing adjustment steps. The assembly costs 20-25 percent more but provides faster replacement and warranty coverage for both wheel and bearings for 12 months.
Q: How do I install the SU S818-A load wheel assembly?
A: Remove the hub fasteners with a socket wrench and unbolt the old assembly from the axle. Align the SU S818-A bore with the axle and slide into position. Install and torque fasteners to 45-65 foot-pounds. Do not use a dead-blow mallet to install; sealed bearings are preloaded and mallets can damage cartridge seals. Allow 30 minutes for bearing preload to settle before operating under load.
Q: Is the SU S818-A assembly compatible with my current lift truck?
A: The SU S818-A fits Yale, Crown, Hyster, and Nissan trucks with 1.938-inch bore and 3.125-inch hub width matching the assembly bore depth of 0.968 inches. Verify bore diameter and hub width on your existing wheel assembly before ordering. Incompatible hubs cause improper bearing preload and wheel failure. Cross-reference your truck model number for confirmation.
Q: What is the expected service life of the SU S818-A assembly?
A: The SU S818-A assembly delivers 24-30 months service life under normal warehouse duty with sealed bearings rated for 5,000-6,500 pounds load. Wet environments, outdoor use, or sustained high-temperature operation reduce bearing life to 12-18 months. Tire tread typically wears before sealed bearings fail. If bearing noise develops, replace the entire assembly; bearings cannot be serviced.
Q: What maintenance is required for the SU S818-A assembly?
A: The SU S818-A requires minimal maintenance because bearings are sealed. Monthly check that wheels spin freely with no grinding or resistance. Inspect tire tread for flat spots, gouges, or separation from the core. Clean debris from the wheel bore and hub. Do not attempt to re-lubricate sealed bearings; over-lubrication damages seals causing water ingress and rust. Replace if bearing noise or wheel wobble develops.