Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What does the SU S423-A load wheel assembly include compared to the SU S423 wheel only?
A: The SU S423-A is a complete wheel assembly that includes the 3.25 x 4 poly load wheel pre-mounted on an axle or hub assembly with bearing hardware, ready for installation. The SU S423 is the wheel only and requires existing axle and bearing components. Order the SU S423-A when your axle is damaged, bearings are worn, or you need a ready-to-install assembly. Both the SU S423 and SU S423-A wheels are identical in diameter, width, and poly material—only the assembly completeness differs.
Q: How do I install the SU S423-A wheel assembly on my lift truck?
A: Raise and support the lift truck safely using jack stands or blocks under the frame. Remove the cotter pin and axle nut from the wheel location where you will install the SU S423-A. Use a bearing puller to remove the existing wheel assembly if necessary. Slide the SU S423-A assembly onto the axle stub, align it with the equipment frame and suspension, and insert the axle nut. Tighten securely and install a new cotter pin. Verify the wheel spins freely and check all fasteners before operating. Repeat for all wheels that require replacement to maintain load balance.
Q: Is the SU S423-A compatible with all lift truck models that use 3.25 x 4 wheels?
A: The SU S423-A is designed for equipment that specifies a 3.25 x 4 wheel assembly in the documentation. However, bearing housing design, axle configuration, and equipment frame geometry vary by manufacturer. Verify the SU S423-A is compatible with your specific equipment model before installation. Compare part numbers, measure the axle stub diameter and length, and confirm the bearing housing bolt pattern and size match. If your equipment manufacturer does not reference the SU S423-A, contact technical support to confirm fitment.
Q: What maintenance is required for the SU S423-A wheel assembly?
A: Inspect the SU S423-A monthly for wheel damage, bearing noise, or grease leakage from the bearing housing. Rotate the wheel by hand to confirm smooth, free rotation without grinding or squeaking. Lubricate the bearing according to your equipment manual—do not over-lubricate, as excess grease attracts dirt and accelerates bearing wear. Clean the wheel and bearing housing with a dry cloth to remove debris. Check that all fasteners remain tight, especially the axle nut and any bearing housing bolts. Replace the assembly if the bearing is noisy, damaged, or leaks oil.
Q: How long does the SU S423-A wheel assembly typically last, and what warranty coverage applies?
A: The SU S423-A assembly typically lasts 3 to 5 years with routine maintenance and moderate use. High-duty warehouse applications may require replacement every 1 to 2 years. The wheel material and bearing lifespan depend on equipment load capacity, hours of weekly operation, and floor surface conditions. Warranty coverage varies by supplier and conditions—review your purchase documentation for terms. Damage from misalignment, overloading, improper installation, or lack of maintenance may void warranty coverage. Replace the assembly immediately if you observe safety hazards or mechanical failure.