Product Description
SU S9144-XL-A Load Wheel Assembly for electric lift trucks and pallet jacks, constructed from high-performance polyurethane and steel core. Designed with XL3™ bonding technology for superior cut and tear resistance. Direct fit replacement for Superior XL models and compatible with select electric truck models.
Specifications: 3.250 inch diameter x 4.500 inch width (3.250" x 4.500" | 3.25 x 4.5 wheel | 3-1/4 x 4-1/2 | 82.55mm x 114.30mm)
Specifications
Material
| Core Material | Steel core with proprietary XL3™ bonding |
Part Numbers
| Manufacturer Part Number | SU S9144-XL-A |
| OEM Part Number | SU 9144-XL |
| Cross-Reference Part Numbers | Replaces Superior XL L509144, equivalent to SU 9144-XL |
| Alternate Part Numbers | L509144, SU9144XL |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 4.5 |
| Bore Depth | 0.512 |
| Hub Width | 4.5 |
| Bore Outside Diameter | 2.1649 |
Frequently Asked Questions
Q: What makes the XL3 bonding technology different from standard load wheel assemblies?
A: XL3 bonding technology involves special steel preparation and a proprietary bonding agent that creates superior cut and tear resistance compared to standard assemblies. The process includes surface finishing of the steel core before the Cushothane XL polyurethane tread is bonded. This results in a wheel that handles rough warehouse flooring and sharp objects better, reducing premature failure in demanding environments.
Q: Is the SU S9144-XL-A a direct replacement for Superior XL model wheels?
A: The SU S9144-XL-A is equivalent to Superior XL L509144 and replaces that part number. It is also interchangeable with OEM part number SU 9144-XL. However, always verify your equipment manual or contact your equipment manufacturer before substitution to ensure the 3.250 inch diameter x 4.500 inch width specifications match your electric truck configuration.
Q: What are the physical dimensions and why does size matter for replacement?
A: The SU S9144-XL-A measures 3.250 inches outside diameter by 4.500 inches width (82.55mm x 114.30mm). Incorrect wheel diameter can cause load imbalance, uneven weight distribution across all wheels, and premature bearing wear. Mismatched width affects the hub fit and can result in lateral play or wheel slippage under load.
Q: How do I know if a load wheel assembly needs replacement?
A: Replace the assembly when you observe flat spots or visible cuts deeper than 1/8 inch, excessive vibration during operation, audible grinding or squealing from the bearing, or if the tread has worn to less than 80 percent of original thickness. Test by spinning the wheel by hand; it should rotate smoothly without catching or grinding noise.
Q: What tools and precautions are needed for installation?
A: You will need a bearing puller or specialized wheel removal tool specific to your equipment model. Do not use impact tools or excessive force that can damage the hub. Always lower the truck fully and secure it with mechanical locks before removing wheels. Wear safety glasses and work gloves. Some wheels may be interference fits that require careful alignment; consult your equipment service manual for the specific installation procedure.
Q: What is the expected service life of this wheel assembly?
A: Under normal warehouse conditions with properly maintained equipment, the SU S9144-XL-A typically lasts 12 to 24 months. Life depends on floor conditions, load weight, operating hours, and whether the truck is used indoors or in wet environments. Regular inspection every 6 months for damage and bearing condition will help you plan maintenance schedules.