Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What is the equivalent part to the SU 631-EZ-A Load Wheel Assembly?
A: The SU 631-EZ-A is the complete assembly unit. If you need only the wheel, the SU 631-XL is the matching load wheel for this assembly. Cross-check your serial range and model year; SU 631-EZ-A fits Yale and Hyster-Yale models built between 2012 and 2020.
Q: Is the SU 631-EZ-A compatible with all electric lift truck models?
A: No. The SU 631-EZ-A is designed for Yale and Hyster-Yale electric pallet jacks and walk-behind stackers with a 24V electrical system. Do not use on combustion models or 36V systems. Always verify the truck nameplate voltage and check your parts manual for your specific model code.
Q: How do I know if the SU 631-EZ-A assembly needs replacement?
A: Symptoms include flat spots on the wheel, wobbling during movement, squealing bearings, or reduced load capacity. If the truck pulls to one side or the wheel will not spin freely, the assembly is likely worn. Check for cracks or chunks missing from the polyurethane tire.
Q: What tools do I need to install the SU 631-EZ-A?
A: You will need a 5/16 hex wrench, a rubber mallet, and bearing grease. The assembly bolts directly onto the axle shaft. Remove the cotter pin, slide off the old assembly, clean the axle shaft, and slide the new SU 631-EZ-A on. Ensure the bearing preload nut is hand-tight plus 1/8 turn. Grease through the zerk fitting before returning to service.
Q: What is the load capacity and wheel size of the SU 631-EZ-A?
A: The SU 631-EZ-A supports up to 3500 pounds per wheel on tandem-wheel trucks. The wheel diameter is 5 inches with a 2-inch polyurethane tire. Maximum sustained load is 2000 pounds for single-wheel models. Operating temperature range is 14 to 140 degrees Fahrenheit.
Q: How often should the SU 631-EZ-A be serviced?
A: Grease the wheel assembly every 40 operating hours or monthly, whichever comes first. Apply grease through the zerk fitting until grease appears around the wheel axle. Inspect for wear every 500 hours. The tire will last 18 to 24 months under normal warehouse use. Replace the assembly as a unit if the tire is worn below 1/2 inch depth.