Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What is included in the SU S556-XL-A load wheel assembly and how does it differ from the component wheel alone?
A: SU S556-XL-A is a complete pre-assembled load wheel kit that includes the polyurethane wheel, steel hub, sealed ball bearings, retaining clip, and axle shaft. This assembly is a plug-and-play replacement that eliminates individual component sourcing and installation time. The assembly saves approximately 90 minutes of labor per wheel compared to sourcing and installing individual parts.
Q: Is the SU S556-XL-A assembly compatible with my existing truck chassis and axle configuration?
A: SU S556-XL-A fits all standard electric lift truck axles with a 5/8-inch shaft diameter manufactured after 2012. However, verify your truck axle bore size before purchase. If your truck has a modified chassis or non-standard bearing configuration, contact the manufacturer with your serial number. The assembly requires no machine work or modifications for standard configurations.
Q: What is the installation procedure for the SU S556-XL-A assembly?
A: Lift the truck on a level surface using a 3000-pound minimum rated jack. Remove the old wheel by sliding it off the axle shaft. Clean the axle shaft with a cloth to remove debris. Slide the SU S556-XL-A assembly onto the shaft, aligning the spline. Secure the retaining clip into the axle groove. Lower the truck and test roll 20 feet forward and backward to verify bearing function.
Q: What does the SU S556-XL-A assembly warranty cover and what voids it?
A: The assembly includes a 12-month or 2000-hour warranty against manufacturing defects in bearings, hubs, and retaining mechanisms. Warranty does not cover polyurethane wear, which is a consumable. Warranty is voided if the truck is operated beyond 30 percent grade inclines, exposed to temperatures exceeding 65 degrees Celsius, or if unauthorized modifications are made to the hub or shaft.
Q: When should I order the SU S556-XL-A assembly as a preventive replacement versus an emergency repair?
A: Order replacement assemblies when wheels show visible flat spots, when the truck begins to drift more than two inches during a 30-foot straight-line test, or when bearing noise increases noticeably. Preventive replacement extends truck operational life and avoids unexpected downtime. Plan for assembly replacement every 3 to 4 years if the truck operates 8 hours daily in warehouse conditions.