SU S9129-A

Frequently Asked Questions

Q: What is the difference between SU S9129-A Load Wheel Assembly and a bare SU S9129 wheel?
A: SU S9129-A is a pre-assembled wheel unit that includes the wheel body, sealed bearing, retaining clip, and axle adapter all installed and tested at the factory. A bare wheel requires you to install the bearing and clip yourself. The assembly is recommended for field technicians who need a plug-and-play solution. The bare wheel is recommended if you are rebuilding a unit or need only the wheel body as a spare.

Q: What electric lift truck models is SU S9129-A designed for?
A: SU S9129-A is specified by the manufacturer for light-duty electric lift trucks including walk-behind pallet jacks, narrow-aisle stackers, and compact indoor material handlers. The assembly conforms to OEM specifications for fitment and load rating. Verify your truck model in the manual or contact the manufacturer with the truck serial number to confirm compatibility; do not rely on wheel size alone.

Q: Can I install SU S9129-A without special tools and how long does installation take?
A: Yes, installation requires only a wrench or clip removal tool to disassemble the old wheel and install the new assembly. Typical installation time is 10-15 minutes per wheel. Slide the assembly onto the 20mm axle and secure with the retaining clip. Do not over-tighten the clip, as excessive force can crack the wheel body. Ensure the wheel spins freely with no wobble; if wobbling occurs, remove and re-seat the assembly.

Q: When should I replace the bearing vs. the entire SU S9129-A assembly?
A: If the wheel body remains undamaged but the sealed bearing is noisy or gritty, replacement of the entire assembly is required, as the sealed bearing is not user-serviceable. Do not attempt to open the sealed bearing or apply lubricant. Replace the entire SU S9129-A assembly when bearing failure is detected. Sealed bearing lifespan is typically 24-48 months depending on usage intensity.

Q: What is the rated load capacity of SU S9129-A and how do I verify it for my truck?
A: Load capacity is typically 600 to 1000 pounds per wheel depending on truck model and axle configuration. The assembly specification sheet or OEM manual will list the exact rating. Do not exceed the rated load by installing the assembly on a larger or heavier-duty truck. Overloading can cause bearing failure, axle damage, and loss of steering control.

Q: How long does SU S9129-A last in typical warehouse use and what are the replacement indicators?
A: Lifespan is typically 24-36 months in moderate-use warehouses, 12-24 months in high-impact environments. Replace when you observe wheel cracking, flat spots, bearing noise, or steering wobble. If the wheel no longer rolls smoothly or requires excessive force to push the truck, the bearing inside the assembly has failed and replacement is required. Do not delay replacement; continuing to operate with a failed bearing increases risk of sudden steering loss.