Product Description
POLY LOAD WHEEL ASSY
Specifications: 5.000 inch diameter x 3.875 inch width (5.000" x 3.875" | 5 x 3.88 wheel | 5 x 3-7/8 | 127.00mm x 98.42mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 5 |
| Inside Diameter | 2.188 |
| Width Side to Side | 3.875 |
| Tread Profile | 3/8 Radius |
| Bore Depth | 0.67 |
| Bore Outside Diameter | 2.4384 |
Frequently Asked Questions
Q: What is included in the SU S458-A poly load wheel assembly?
A: The SU S458-A is a complete assembled unit that includes the polyurethane load wheel (5 inch diameter x 3.875 inch width), the bearing, and all mounting hardware. This is a drop-in replacement assembly. If only the wheel tread is worn and the bearing is still good, you can order just the SU S458 wheel separately to save cost.
Q: Is the SU S458-A equivalent to wheels from other manufacturers like Yale or Hyster?
A: The SU S458-A may be equivalent to load wheel assemblies from other brands if the bore diameter (2.188 inches), width (3.875 inches), and mounting configuration match. Cross-reference the exact part numbers for Yale, Hyster, or other brands against these dimensions. Do not assume equivalence based on appearance alone—bore diameter mismatch is the most common installation error.
Q: What is the installation procedure for the SU S458-A assembly on my electric lift truck?
A: Jack the truck safely off the ground or support it on jack stands. Locate the wheel to be replaced. Remove any retaining pin, cotter pin, or washer securing the old assembly to the axle shaft. Slide the old assembly off the shaft. Position the SU S458-A assembly on the axle, ensuring it sits flush against any mounting flange. Reinstall the retaining hardware. Rotate the wheel by hand to confirm smooth operation before lowering the truck.
Q: How do I diagnose if the SU S458-A bearing is failing versus the wheel being worn?
A: Spin the wheel by hand. A worn wheel will not have smooth tread but the bearing will spin freely. A failing bearing will produce grinding or squealing noises, resistance to rotation, or play when you rock the wheel side to side. If the bearing is the issue, replace the entire SU S458-A assembly. If only the wheel tread is worn, you can replace just the SU S458 wheel and reuse the bearing.
Q: What is the proper maintenance schedule for the SU S458-A assembly?
A: Inspect every 500 operating hours. Clean the wheel weekly to remove dirt and debris that can grind into the bearing and accelerate wear. Apply light machine oil or bearing grease to the bearing every 1,000 hours if the assembly is not sealed. Never apply water or pressure washers to the bearing area. If the wheel or bearing shows any play, grinding noise, or flat spots, remove and replace the assembly immediately.