Product Description
SU S400-XL-A is a polyurethane wheel part with 97A durometer, designed for electric lift truck applications and identified by OEM/manufacturer number SU S400-XL-A. No cross-reference part numbers are available at this time.
Specifications: 3.346 inch diameter x 4.331 inch width (3.346" x 4.331" | 3.35 x 4.33 wheel | 3.346 x 4.331 | 84.99mm x 110.01mm)
Specifications
Part Numbers
| Manufacturer Part Number | SU S400-XL-A |
| OEM Part Number | SU S400-XL-A |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.346 |
| Inside Diameter | 1.938 |
| Width Side to Side | 4.331 |
| Bore Depth | 0.7875 |
| Hub Width | 4.331 |
| Bore Outside Diameter | 2.1648 |
Frequently Asked Questions
Q: What is the SU S400-XL-A and does it have any cross-reference equivalents?
A: The SU S400-XL-A is a polyurethane wheel assembly with 97A durometer tread and aluminum hub, sized 3.346 x 4.331 inches. No cross-reference part numbers are currently available. This part number may be specific to a particular lift truck manufacturer or distributor. Verify your truck documentation lists this exact SKU; if not, consult your supplier for the correct replacement wheel part number.
Q: Are the SU S400-XL and SU S400-XL-A the same wheel?
A: The S400-XL and S400-XL-A are equivalent in function and specification; both are 3.346 x 4.331 inch wheels with 97A durometer and aluminum hubs. The -A suffix likely indicates a revised design or supplier designation but does not change mechanical compatibility. Either part number is acceptable as a replacement for the other on compatible trucks. Check your truck parts manual to confirm your truck specifies one of these numbers.
Q: What are the exact bore dimensions of the SU S400-XL-A?
A: The SU S400-XL-A has a 1.938 inch inside diameter (ID) and a 2.1648 inch bore outside diameter (OD), with a bore depth of 0.7875 inch and hub width of 4.331 inches. These dimensions must match your truck axle pin size and hub mounting style. Measure your existing wheel bore or consult the truck manual to confirm compatibility before ordering.
Q: Can the SU S400-XL-A be used in drive or load wheel positions?
A: Yes, the SU S400-XL-A is suitable for both drive and load wheel applications on compatible lift trucks. Drive wheel duty requires more frequent replacement due to higher stress. Load wheel duty typically provides longer service life. Inspect both positions quarterly and replace wheels in the load position when flat-spotting or cracks develop, as a failed load wheel can cause sudden load drop.
Q: What is the proper procedure to replace the SU S400-XL-A?
A: Place the truck on jack stands under the frame rails only. Remove the axle bolt and retainer clip. Slide the old wheel off the axle. Align the hub bore of the new S400-XL-A with the axle and slide it on. Reinstall the bolt and clip. Torque the bolt to 25-35 ft-lb (verify in your truck manual). Spin the wheel to confirm free rotation and zero lateral play. Do not operate the truck until the bolt is fully secure.
Q: How long will the SU S400-XL-A wheel last in service?
A: The SU S400-XL-A typically lasts 2-4 years depending on position (drive wheels wear faster) and warehouse conditions. Lifespan is determined by floor type, load cycles, and inspection frequency. Inspect visually every 6 months for cracks, flat-spotting exceeding 0.25 inch, or bearing play. Clean wheels monthly to remove debris. Replace immediately if the wheel fails to spin freely or if the hub separates from the axle during operation.