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 the SU S143-XL and SU S143-XL-A?
A: The SU S143-XL is the wheel only, while the SU S143-XL-A is a complete load wheel assembly that includes the wheel, hub, and integrated bearings or bearing blocks pre-mounted and ready to install. The assembly version saves labor during installation because you do not need to separately press bearings or bushings. Both have the same 4.000 inch diameter and 2.750 inch width.
Q: Do I need tools to install the SU S143-XL-A assembly?
A: Installation of the SU S143-XL-A assembly is simplified. You need a floor jack, socket wrench, and possibly a service stand, depending on your truck. Remove the old wheel assembly, insert the new SU S143-XL-A onto the axle, and tighten the fastener. The assembly comes pre-assembled, so you do not need bearing presses or specialized tools. Spin the wheel by hand to verify smooth rotation before operating the truck.
Q: Is the SU S143-XL-A assembly compatible with my current truck?
A: Compatibility depends on axle diameter, wheel stud or pin type, and width clearance. The assembly has a 4.000 inch outside diameter and 2.750 inch width. Verify that your truck uses the same axle size and mounting configuration. Check your truck service manual or contact the OEM if you are unsure. Installing an incompatible assembly can damage the truck suspension or create clearance issues.
Q: Can I replace just the wheel or do I need the entire SU S143-XL-A assembly?
A: If your current assembly has serviceable bearings or bushings, you may be able to replace only the wheel (SU S143-XL) by pressing off the old wheel and pressing on the new one. If the bearings are worn or the assembly cannot be disassembled, you must replace the entire SU S143-XL-A assembly. Inspect the hub and bearings before deciding. If you are uncertain, order the assembly to avoid installation problems.
Q: How long does the SU S143-XL-A assembly last before needing replacement?
A: The SU S143-XL-A assembly typically lasts 2 to 5 years with normal warehouse use. Lifespan depends on load, floor surface, and maintenance. Monitor tread wear monthly. If you hear grinding noises, feel excessive vibration, or notice uneven tire wear, the bearings may be failing and the assembly should be replaced soon. Heavy daily use or outdoor operations reduce service life significantly.
Q: What specifications should I verify before ordering an SU S143-XL-A assembly?
A: Before ordering, confirm: the 4.000 inch diameter fits your truck width, the 2.750 inch wheel width has clearance on both sides, the axle diameter matches the bore size, and the mounting type (bolt vs pin) matches your truck. Review your lift truck model and serial number documentation. If specifications do not match exactly, do not order, as installation will fail or cause damage.