Product Description
Load Wheel Assembly
Specifications: 3.250 inch diameter x 6.375 inch width (3.250" x 6.375" | 3.25 x 6.38 wheel | 3-1/4 x 6-3/8 | 82.55mm x 161.92mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 6.375 |
| Bore Depth | 0.812 |
| Hub Width | 6.375 |
| Bore Outside Diameter | 2.0467 |
| Tread Profile |
Frequently Asked Questions
Q: Is the SU S528-EZ-A assembly a direct replacement for the SU S528-A?
A: Yes, the SU S528-EZ-A and SU S528-A are interchangeable load wheel assemblies. Both are 3.25 x 6.375 inches, Cushothane XL material, and share identical bore specifications (1.938 inside diameter, 2.0467 bore outside diameter, 0.812 bore depth). They are rated for the same electric lift truck applications. Order the SU S528-EZ-A as a direct replacement for the SU S528-A without modification to the truck frame.
Q: What tools do I need to install the SU S528-EZ-A assembly?
A: Installation depends on your truck mounting system. For bolt-on assemblies, you need a wrench or socket set matching your frame bolt size, typically 3/8 inch or 1/2 inch. For press-fit hubs, you need a press tool or access to a hydraulic press. Most electric lift truck wheels are bolt-mounted. Do not use a hammer to force-fit the assembly; this damages the bore and hub surfaces. If uncertain, consult your truck service manual.
Q: How do I know if the SU S528-EZ-A is worn out and needs replacement?
A: Remove the truck from service and visually inspect the tread. Replace the assembly if you observe cracks, missing chunks of tread larger than 0.25 inches, or uniform tread wear exceeding 0.25 inches depth. Spin the wheel by hand; it should turn smoothly without wobbling. If wobble persists after confirming bolts are tight, the hub may be damaged and the assembly requires replacement.
Q: Can I replace just the wheel tread on the SU S528-EZ-A without replacing the hub?
A: No. The SU S528-EZ-A is a sealed assembly; the wheel tread is molded directly onto the hub and cannot be separated or replaced independently. When the tread reaches end-of-life, you must replace the entire assembly. This design ensures consistent performance and eliminates the risk of improper installation of separate components.
Q: What is the maximum speed rating for the SU S528-EZ-A?
A: Electric lift trucks using the SU S528-EZ-A typically operate at maximum speeds of 12 to 15 miles per hour depending on the truck model. The Cushothane XL tread is rated for continuous operation at these speeds without overheating or tread separation. Do not exceed your truck manufacturer maximum speed limit; doing so increases wear and risks hub failure.
Q: How should I store spare SU S528-EZ-A assemblies?
A: Store the assembly indoors in a cool, dry location away from direct sunlight and heat sources. Temperatures should remain between 50°F and 85°F. Do not stack heavy objects on top of the assembly as this can permanently deform the Cushothane XL tread. Store on a flat surface or hang on a wheel rack. Properly stored assemblies maintain specifications for up to 3 years before use.