Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What bearing type does SU 359-A assembly use?
A: SU 359-A includes tapered roller bearings rated for 9,000 pound static load capacity. The bearings are pre-packed with grease and sealed to prevent contamination. Do not attempt to repack or replace bearings yourself without a bearing puller and press. Damaged bearings require full assembly replacement.
Q: Is SU 359-A a direct replacement for the Yale 582-EL-20 load wheel assembly?
A: SU 359-A and Yale 582-EL-20 share the same bolt pattern and hub diameter, making SU 359-A a compatible cross-reference. However, verify axle length on your truck before ordering. Yale trucks manufactured after 2015 may have different fastener specifications. Confirm part number with your truck manual or contact the manufacturer.
Q: How long does it take to install SU 359-A assembly?
A: Installation takes 30 to 45 minutes. Lift the truck on blocks, remove the axle fasteners, slide out the old assembly, and install the new SU 359-A unit. Torque fasteners to 45 foot-pounds in a star pattern and lower the truck. Allow 10 minutes of operation before heavy loading to ensure bearings are properly seated.
Q: Can I mix SU 359-A assemblies with SU 375-A on the same truck?
A: No. Mixing different assembly sizes causes uneven load distribution and steering instability. All front wheels must be the same type and all rear wheels the same type. Always replace assemblies in pairs (front or rear) to maintain truck balance and control.
Q: What causes premature bearing wear in SU 359-A assemblies?
A: Bearings fail prematurely from water contamination, impact damage during strikes or curb hits, or over-torqued fasteners. If bearings make a grinding or clicking noise, replace the entire assembly immediately. Continuing operation with bad bearings will seize the wheel and cause loss of truck control.
Q: Is SU 359-A rated for outdoor or wet-floor use?
A: SU 359-A uses sealed tapered roller bearings that tolerate occasional wet floors but are not rated for extended outdoor or high-pressure wash exposure. Excessive water ingress will degrade grease and cause corrosion of bearing races. For outdoor trucks or wet environments, specify sealed stainless-steel bearing assemblies during procurement.