Product Description
Load Wheel Assembly
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
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 difference between SU 143-XL and SU 143-XL-A?
A: The SU 143-XL-A is a complete wheel assembly, not a wheel alone. It includes the hub core, bearing provisions, and pre-assembled wheel. The SU 143-XL is the wheel component only. Use the SU 143-XL-A when replacing a failed assembly unit. The dimensions remain identical at 4.000 inches diameter by 2.750 inches width.
Q: Can I install the SU 143-XL-A assembly directly onto my existing lift truck axle?
A: The SU 143-XL-A assembly can be installed on standard 1/2-inch and 5/8-inch axles common to electric lift trucks. Verify your axle diameter before ordering. The assembly mounts with a retaining pin or E-clip. Do not force the bore onto the axle. If the fit is loose, confirm you have the correct bore specification.
Q: What maintenance does the SU 143-XL-A assembly require?
A: The SU 143-XL-A assembly includes sealed bearings and requires minimal maintenance. Do not attempt to repack or disassemble bearings. Clean the wheel surface monthly and inspect for axial play. If the assembly rotates with grinding noise or exhibits side-to-side movement, replace the assembly rather than attempting bearing repair.
Q: Is the SU 143-XL-A equivalent to any competitor wheel assemblies?
A: Cross-reference and equivalent part numbers for the SU 143-XL-A are not currently available in published sources. Do not assume compatibility with assemblies from other manufacturers without verifying bore diameter, hub width, and bearing type. Contact the supplier with your truck model and serial number for compatibility confirmation.
Q: What symptoms indicate the SU 143-XL-A assembly needs replacement?
A: Replace the assembly if you observe: (1) grinding or squealing noise during rotation, (2) excessive lateral play at the wheel rim, (3) visible tread loss greater than 25 percent, (4) flat-spotting or chunking of the wheel tread, or (5) difficulty rotating the wheel under light hand pressure. Do not continue operation with a damaged assembly as it creates safety hazards and accelerates wear on the axle.
Q: How long does the SU 143-XL-A assembly typically last in warehouse service?
A: Lifespan varies by floor surface, load weight, and usage frequency. On smooth concrete floors with moderate use, expect 18 to 36 months before replacement. Rough floors, outdoor use, or heavy loads reduce lifespan to 12 to 24 months. Preventive maintenance and regular inspection extend service life.