Product Description
Technical specification for SU 684-XL-A (L500684ASSY1) 8x4 inch XL polyurethane load wheel assembly with integral bearing, designed for electric lift trucks and heavy-duty material handling applications. Manufactured by Superior (Liftsplus.com), this idler caster wheel provides durable performance in industrial environments.
Specifications: 8.000 inch diameter x 4.000 inch width (8.000" x 4.000" | 8 x 4 wheel | 8 x 4 | 203.20mm x 101.60mm)
Specifications
Application
| Compatible Equipment | Electric lift trucks, material handling equipment |
Part Numbers
| Manufacturer Part Number | SU 684-XL-A |
| Alternative/SKU | L500684ASSY1 |
Wheel Dimensions
| Material | |
| Outside Diameter | 8 |
| Inside Diameter | 2.25 |
| Width Side to Side | 4 |
| Tread Profile | |
| Bore Depth | 0.63 |
| Hub Width | |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What is the bore specification and cross-reference part number for the SU 684-XL-A?
A: The SU 684-XL-A is an 8 x 4 inch XL polyurethane load wheel assembly with a 3.149 inch bore diameter and 0.63 inch bore depth. The bore outside diameter measures 2.4404 inches. The alternative SKU is L500684ASSY1. This assembly includes integral bearings designed for direct replacement on electric lift trucks and material handling equipment from multiple manufacturers.
Q: Which electric lift truck and material handling equipment brands does the SU 684-XL-A fit?
A: The SU 684-XL-A is compatible with electric lift trucks and material handling equipment from Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, Linde, Clark, Mitsubishi, CAT, and BT. This assembly is a direct drop-in replacement for OEM load wheels on compatible models. Always verify that your specific truck model accepts an 8 x 4 inch wheel assembly and matches the bore specifications before ordering.
Q: What does the integral bearing design mean for installation and maintenance?
A: The integral bearing design means the bearing is permanently sealed within the wheel assembly and cannot be serviced separately. During installation, you remove the old wheel and bearing assembly as a single unit and replace it with the SU 684-XL-A complete assembly. This design eliminates bearing adjustment and field lubrication tasks. When the bearing fails or becomes loose, you replace the entire SU 684-XL-A assembly rather than attempting to service individual components.
Q: How do I install the SU 684-XL-A load wheel assembly on my electric lift truck?
A: Lift the truck and secure it on jack stands or a hoist. Remove the snap ring or bolt retaining the old wheel assembly. Slide the old assembly off the axle shaft. Clean the axle shaft with a wire brush to remove rust and debris. Align the bore of the SU 684-XL-A with the axle shaft and slide it into position until fully seated. Reinstall the snap ring or bolt and verify the wheel rotates smoothly. Test the installation before returning the truck to service.
Q: What maintenance is required for the SU 684-XL-A during its service life?
A: Monitor the wheel monthly for debris accumulation, cracks in the polyurethane, or unusual noise during rotation. Clean the wheel and surrounding mounting area with a brush or damp cloth to remove dirt, salt, and oils. Listen for grinding or clicking sounds that indicate bearing wear or play. The integral bearing design requires no field lubrication or adjustment. Replace the entire SU 684-XL-A assembly when bearing movement becomes visible, tread flattens significantly, or cracks appear in the wheel material. Expected service life is 18-30 months with normal use.