Product Description
RUBBER PRESS-ON ASSY
Specifications: 8.500 inch diameter x 4.000 inch width (8.500" x 4.000" | 8.5 x 4 wheel | 8-1/2 x 4 | 215.90mm x 101.60mm)
Specifications
Wheel Specifications
| Outside Diameter (in) | 8.500 |
| Width (in) | 4.000 |
| Outside Diameter (mm) | 215.90 |
| Width (mm) | 101.60 |
| Drive Tire Profile | Smooth Flat |
| Material | Rubber |
Frequently Asked Questions
Q: What does the SU 8.5X4X4-SF-R-A assembly include?
A: The SU 8.5X4X4-SF-R-A is a complete pre-assembled rubber drive wheel with the 8.5 inch x 4 inch smooth flat rubber tire already pressed and mounted on the hub. This is ready-to-install compared to the bare tire version. The assembly includes the hub, bearings, and pressed rubber tire as a single unit.
Q: How do I install the SU 8.5X4X4-SF-R-A assembly on my lift truck?
A: Remove the axle bolt from the lift truck frame or drive motor. Slide the wheel assembly onto the axle until the bore bore seats fully. Install and tighten the axle bolt with a torque wrench to 35 to 45 foot-pounds depending on your equipment manual. Verify the wheel spins freely and does not wobble. Check that the wheel is centered and does not rub the frame.
Q: What bolt and bearing specifications does the SU 8.5X4X4-SF-R-A use?
A: The SU 8.5X4X4-SF-R-A typically uses a 1/2 inch or 5/8 inch axle bolt depending on the lift truck model. Verify your equipment documentation for exact bolt size and torque specification. The assembly includes deep groove ball bearings on both sides of the hub. Do not over-tighten the axle bolt as this will bind the bearings and cause premature failure.
Q: Can I replace just the rubber tire if the SU 8.5X4X4-SF-R-A hub is still good?
A: Yes, if the hub and bearings are undamaged and rotate smoothly without play, you can order the bare SU 8.5X4X4-SF-R tire and press it onto your existing hub using a hydraulic wheel press. However, if the hub shows wear, corrosion, or bearing noise, replace the entire assembly. Damaged hubs can cause tire failure and safety hazards.
Q: How long does an SU 8.5X4X4-SF-R-A wheel assembly last?
A: The rubber tire typically lasts 2 to 5 years depending on floor type, load, and usage hours. The hub and bearings can last 5 to 10 years if properly lubricated and not overloaded. If the wheel is used in outdoor or wet conditions, inspect more frequently for corrosion. Replace the entire assembly if you hear grinding, squeaking, or if the wheel wobbles.
