Product Description
Load wheel SU S542, from Liftsplus.com, designed as an electric lift truck part; constructed with abrasion-resistant polyurethane tread and cast iron core, press-fit ball bearing, nominal dimensions 3.00 inch diameter x 2.00 inch width x 20 mm bore. Compatible with electric pallet trucks requiring SU S542 spec load wheels.
Specifications: 4.000 inch diameter x 2.875 inch width (4.000" x 2.875" | 4 x 2.88 wheel | 4 x 2-7/8 | 101.60mm x 73.02mm)
Specifications
Material & Construction
| Finish | Machined iron core with polyurethane tread |
Part Numbers & Compatibility
| OEM Part Number | SU S542 |
| Manufacturer Part Number | SU S542 |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 4 |
| Inside Diameter | 1.875 |
| Width Side to Side | 2.875 |
| Tread Profile | Angle |
| Bore Depth | 0.75 |
| Hub Width | 2.875 |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What is the exact bore diameter and what axle sizes fit the SU S542?
A: The SU S542 has a 1.875 inch inside bore diameter with a bore depth of 0.75 inches. The bore outside diameter is 2.4404 inches. This wheel is designed for 20mm metric bore axles and common 3/4 inch imperial shafts. Always verify your equipment manual before ordering. A loose or tight fit will cause premature failure.
Q: Is the SU S542 equivalent to any Yale or Hyster wheels?
A: The SU S542 specifications (4.000 inch diameter x 2.875 inch width, Cushothane XL tread, cast iron core) are equivalent to Yale YL-5421847 and certain Hyster part numbers for electric pallet trucks. However, always cross-reference the bore diameter and width tolerance before substituting. Core material and tread hardness must match the original specification.
Q: Can the SU S542 be press-fitted or does it require a keyed fit?
A: The SU S542 uses a press-fit design with no keyway or retention pin. Do not attempt a loose fit. Use an arbor press at 2 to 5 tons pressure and press straight onto the axle. The hub is 2.875 inches wide, so press against the inner hub face only. Crooked installation causes binding and premature bearing wear.
Q: What is the maximum load rating for the SU S542 wheel?
A: The SU S542 is a load-bearing wheel rated for 1500 to 2500 pounds per wheel depending on the truck model and suspension setup. Do not exceed the total platform load rating listed in your equipment manual. Overloading causes tread cracking, bearing failure, and axle bending.
Q: What surface finish is used on the SU S542 core and why?
A: The SU S542 has a machined iron core with Cushothane XL polyurethane tread applied by bonding. The machined finish ensures the tread sets evenly and prevents delamination. Do not sand or grind the bore or hub faces as this reduces the press-fit grip. If the hub surface is damaged, replace the wheel.
Q: How do I diagnose if the SU S542 bearing is failing?
A: Symptoms of bearing failure include loud grinding or squealing from the wheel, side-to-side play greater than 0.125 inches when pushed by hand, or the wheel spinning slowly when the truck is lifted. If any symptom is present, replace the wheel immediately. Running on a failed bearing will score the axle shaft.