Product Description
Load Wheel Assembly
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
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 is the difference between SU 9144-EZ-A and SU 9144-A?
A: Both are complete assemblies with pre-installed bearings and hubs. SU 9144-EZ-A is the same as SU 9144-A with an EZ quick-change hub design. The EZ-A hub allows wheel removal without tools or bolt loosening on some lift truck models. Verify your jack model supports quick-change hubs before ordering. If unsure, order SU 9144-A.
Q: Is SU 9144-EZ-A compatible with lift trucks that use bolt-on hubs?
A: No. SU 9144-EZ-A has a quick-release design that works only on lift trucks engineered for this hub type. Installing it on a bolt-on system will result in wheel detachment during operation, creating a safety hazard. Always check your lift truck manual or contact your dealer to confirm hub type before ordering.
Q: Can the quick-change hub on SU 9144-EZ-A be removed and replaced with a standard bolt-on hub?
A: No. The quick-change hub is permanently bonded to the wheel using XL3 polyurethane bonding technology. It cannot be removed without destroying the wheel. If you need a bolt-on hub, order SU 9144-A instead. Attempting to separate the hub will result in tread separation and wheel failure.
Q: What maintenance is required for the quick-change hub on SU 9144-EZ-A?
A: Inspect the quick-release mechanism for dirt, debris, or corrosion every 500 operating hours. Clean with a dry cloth. Do not apply lubricant to the release mechanism unless the manufacturer specifies it. If the wheel becomes difficult to remove or install, clean the mating surfaces. If the mechanism is damaged, the entire wheel assembly must be replaced.
Q: How do I properly install and remove SU 9144-EZ-A wheels on a quick-change hub system?
A: Installation: (1) Align the wheel hub with the lift truck axle, (2) Push firmly until you hear a click, (3) Tug the wheel to verify it is locked. Removal: (1) Press the release button or lever (location varies by truck model), (2) Pull the wheel straight off the axle. Never force the wheel on or off. If resistance occurs, stop and check alignment. Forcing can damage the quick-change mechanism.
Q: Does SU 9144-EZ-A have the same load capacity as SU 9144-A?
A: Yes. Both have 250 lb rated load capacity per wheel. The quick-change hub design does not affect load rating. Do not exceed 250 lb per wheel. The quick-change mechanism will release under overload, creating a safety hazard.