Product Description
Load Wheel Assembly
Specifications: 4.000 inch diameter x 3.625 inch width (4.000" x 3.625" | 4 x 3.63 wheel | 4 x 3-5/8 | 101.60mm x 92.07mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 4 |
| Inside Diameter | 1.875 |
| Width Side to Side | 3.625 |
| Tread Profile | Angle |
| Bore Depth | 0.623 |
| Hub Width | 3.625 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What is included in the SU S645-XL-A load wheel assembly?
A: The SU S645-XL-A is a complete load wheel assembly designed for tandem wheel configurations on electric lift trucks. It includes the 4 inch diameter x 3.625 inch width polyurethane wheel over a steel core, with precision ball bearings pre-installed and sealed. The assembly is ready to mount directly onto the equipment axle without additional bearing installation or setup.
Q: How does the SU S645-XL-A differ from the SU S645-XL wheel-only version?
A: The SU S645-XL is the wheel only, while the SU S645-XL-A is a complete assembly that includes precision ball bearings pre-installed. The assembly version eliminates the need to source and install separate bearings. Choose the wheel-only version if your equipment already has serviceable bearings; choose the SU S645-XL-A assembly if you need a complete replacement unit ready for immediate mounting on a tandem wheel configuration.
Q: What is the rated load capacity and operating duty for the SU S645-XL-A?
A: The SU S645-XL-A is designed for high-cycle electric lift truck applications in tandem configurations. Refer to your equipment manual for the total load rating, as the per-wheel capacity depends on whether the truck is single-wheel or tandem-wheel setup. The assembly is constructed to withstand continuous duty warehouse operations. Do not exceed the equipment manufacturer load limits, as overloading will accelerate bearing wear and reduce wheel lifespan.
Q: Is the SU S645-XL-A a plug-and-play replacement for tandem wheel equipped lift trucks?
A: Yes, the SU S645-XL-A is designed for plug-and-play installation on compatible tandem wheel equipped equipment. Remove the old wheel assembly from the axle and slide the new SU S645-XL-A assembly onto the axle, ensuring it seats fully. Reinstall retaining hardware such as cotter pins or clips. If both wheels in the tandem set are being replaced, install identical assemblies to maintain even load distribution and balanced operation.
Q: How should I maintain and inspect the SU S645-XL-A assembly during routine service?
A: Inspect both wheels in the tandem set monthly for tread wear, cracks, or flat spots. Verify that both assemblies rotate freely without grinding, squealing, or clicking sounds that may indicate bearing wear. Clean debris from both wheels and axles. Ensure that retaining pins or clips are secure on both sides. The sealed ball bearings require no lubrication. If either wheel develops bearing noise or restricted rotation, replace the entire assembly to maintain balanced tandem operation.
Q: What should I do if one of the SU S645-XL-A assemblies in a tandem set fails during service?
A: Replace both wheels in the tandem set with new SU S645-XL-A assemblies to maintain balanced load distribution and even wear patterns. Operating with only one new assembly will cause uneven tracking and accelerated wear on the remaining old wheel. Mismatched wheels in tandem configuration will compromise equipment stability and reduce the lifespan of both wheels. Always replace tandem wheels as a matched pair.