Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What does the A designation mean and how is the SU 151-XL-A different from the SU 151-XL?
A: The A designation indicates a complete assembly (wheel, hub, bearings, and axle hardware pre-installed). The SU 151-XL-A is a drop-in replacement that does not require bearing installation or pressing. The SU 151-XL is the wheel only. Use the 151-XL-A for fastest replacement or if bearings are worn; use the 151-XL if you are reusing the existing hub and bearing assembly.
Q: Is the SU 151-XL-A assembly a plug-and-play replacement or does it require modification?
A: The 151-XL-A assembly is designed to be plug-and-play if your truck originally used a 151-XL configuration. Simply remove the old axle assembly and slide the 151-XL-A assembly onto the axle. Secure the axle bolt and cotter pin. Do not force the assembly onto the axle. If it does not slide smoothly, verify bore diameter and axle cleanliness. No cutting, drilling, or modifications should be required.
Q: What tools and how much time does it take to install the SU 151-XL-A assembly?
A: Installation typically requires a socket wrench, cotter pin removal tool, and a jack or lift to raise the truck. Time required is 15 to 30 minutes per wheel depending on axle bolt tightness and corrosion. Loosen the axle bolt, pull the old assembly off the axle, slide the new 151-XL-A assembly on, tighten the bolt firmly, and secure with a new cotter pin. Never work under a lifted truck without safety blocks in place.
Q: How do I diagnose if the bearings in the SU 151-XL-A assembly are worn?
A: Lift the truck and spin each wheel by hand. A worn bearing will feel rough, gritty, or stuck. Listen for squeaking, grinding, or clicking while rotating the wheel. If the wheel has excessive play (moves up and down on the axle), bearing races are damaged. If any symptom appears, replace the entire 151-XL-A assembly. Bearing repair requires specialized pressing equipment and replacement is usually more cost-effective.
Q: What is the service life of the SU 151-XL-A assembly and what maintenance extends its lifespan?
A: Under normal operation (8 to 10 hours daily on dry floors), expect 3 to 5 years of service before replacement. To extend lifespan, inspect wheels quarterly for cracks, keep the floor clean and dry, and avoid overloading. Do not store the truck in wet or cold environments when not in use. Replace the assembly immediately if sidewall cracks appear, if the wheel no longer rounds smoothly, or if bearing noise develops.