Product Description
Load Wheel Assembly SU S143-A by Liftsplus.com is an industrial-grade electric lift truck part featuring a polyurethane tread and high-strength steel core, designed for electric pallet jacks. Rated for 3300 lbs at a 4-inch load center with a wheel diameter of 3.25 inches and width of 4.00 inches. Includes sealed deep groove ball bearing and suits 0.87 inch axle. No cross-reference equivalents are available.
Specifications: 4.000 inch diameter x 2.750 inch width (4.000" x 2.750" | 4 x 2.75 wheel | 4 x 2-3/4 | 101.60mm x 69.85mm)
Specifications
Material & Construction
| Tread Material | Polyurethane |
| Core Material | High-strength steel alloy |
| Polyurethane Hardness | Shore A 95 ±2 |
| Finish | Electroplated core with pressed-fit polyurethane tread |
| Operating Surface | Suitable for smooth or mildly rough concrete surfaces |
Part Numbers
| Manufacturer Part Number | SU S143-A |
| OEM Part Number | SU143-A |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 4 |
| Inside Diameter | 1.875 |
| Width Side to Side | 2.75 |
| Tread Profile | 1/4 Radius |
| Bore Depth | 0.812 |
| Hub Width | 2.75 |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What is the rated load capacity of the SU S143-A wheel assembly?
A: The SU S143-A is rated for 3300 lbs at a 4-inch load center. This assumes the wheel is properly installed on a compatible electric pallet jack with the axle secured and the truck maintained per OEM guidelines. Do not exceed the load center specification.
Q: Does the SU S143-A have sealed bearings?
A: Yes. The SU S143-A includes a sealed deep groove ball bearing that provides protection against dirt, moisture, and dust ingress. The sealed design eliminates the need for routine lubrication in warehouse and light industrial environments.
Q: What surface types is the SU S143-A suitable for?
A: The SU S143-A polyurethane tread is rated for smooth or mildly rough concrete, tile, vinyl, and industrial epoxy floors. The Shore A 95 hardness provides durable performance on textured surfaces while still protecting finished floors from marking and scuffing.
Q: What is the axle compatibility for the SU S143-A?
A: The SU S143-A is designed for 0.87 inch axles. This dimension corresponds to a standard 7/8 inch axle common on electric pallet jacks and lift trucks. Verify your equipment uses a 7/8 inch axle before ordering to ensure proper fit.
Q: How do I install the SU S143-A wheel assembly?
A: Lower the pallet jack completely and block it with safety stands to prevent accidental lowering. Remove the cotter pin or bolt from the existing wheel axle. Slide the old wheel off the axle. Inspect the axle shaft for corrosion, pitting, or bending. Slide the SU S143-A assembly onto the axle until the hub is flush with the flange. Reinstall the cotter pin or bolt and verify the wheel spins freely before use.
Q: How long does the SU S143-A wheel typically last?
A: The SU S143-A typically lasts 24-48 months in intermittent warehouse and light industrial duty. Lifespan depends on floor surface roughness, load cycling frequency, and whether the truck is used for outdoor or wet environments. Inspect the wheel quarterly for tread loss, cracking, or bearing noise and replace immediately if damage is detected.