Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: How does the SU S9139-A differ from other SU S9139 variants?
A: The SU S9139-A designation indicates a standard configuration load wheel assembly. Without the XL or EZ suffix, this variant may have different hub material or bearing type than XL-A (aluminum hub) or EZ (composite hub) versions. Always cross-reference your lift truck manual or the original part number on the wheel itself before substituting with a different suffix variant.
Q: Is the SU S9139-A a plug-and-play replacement?
A: The SU S9139-A is plug-and-play only if it matches the bore size, diameter, and width of your original wheel. Measure the existing wheel width and hub bore before ordering. If the mounting bolts do not align or the wheel does not sit flush on the axle, do not force installation. Return the part and confirm the correct suffix variant with the lift truck manufacturer.
Q: What tools are needed to replace the SU S9139-A load wheel?
A: You need a hex key or wrench set for the hub bolts (size depends on truck model), a jack to lift the truck (always use a rated industrial jack, not a car jack), and possibly a wheel puller if the wheel is press-fit to the axle. Do not attempt removal on a truck under load or without proper support. Consult your lift truck service manual for torque specifications and bolt size.
Q: What is the typical lifespan of the SU S9139-A before replacement?
A: Lifespan depends on warehouse conditions and load cycles. In normal warehouse use with moderate loads and smooth floors, expect 12 to 24 months before tread wear becomes noticeable. Heavy-duty or continuous-shift operations may require replacement in 6 to 12 months. Inspect tread depth and bearing condition every quarter to catch wear early.
Q: Can I repair a damaged SU S9139-A or must I replace the entire assembly?
A: The SU S9139-A is not repairable. If the tread is damaged, the hub is cracked, or bearings are worn, replace the entire assembly. Attempting to weld, glue, or patch the tread creates an imbalanced wheel that will cause vibration, steering issues, and potential safety hazards. Assembly replacement is faster and safer than repair attempts.