Product Description
SU 9139-EZ-A is a load wheel assembly for electric pallet trucks, featuring a polyurethane tread over a carbon steel core with sealed ball bearings. Wheel dimensions are 2.75 inches diameter by 3.50 inches width. Supplied as a full assembly, compatible with select lift truck models requiring these specifications.
Specifications
Material
| Tread Material | Polyurethane molded over steel core |
| Core Material | Carbon steel |
Part Numbers
| Manufacturer Part Number | SU 9139-EZ-A |
| OEM Part Number | SU 9139-EZ |
Frequently Asked Questions
Q: What are the physical dimensions of SU 9139-EZ-A?
A: SU 9139-EZ-A wheel dimensions are 2.75 inches in diameter and 3.50 inches in width. Verify these dimensions match your pallet truck before ordering. Incorrect size will not mount or will cause poor performance and bearing stress.
Q: Is SU 9139-EZ-A equivalent to SU 9139-A?
A: Yes. SU 9139-EZ-A is listed as a cross-reference to SU 9139-A for Crown GPW Series electric pallet trucks. Both feature polyurethane tread over a steel core with sealed ball bearings. Parts are interchangeable for compatible truck models.
Q: What material is the core and how does it perform?
A: SU 9139-EZ-A uses a carbon steel core for strength and wear resistance. Carbon steel resists deformation under load and provides a stable platform for the polyurethane tread. The core does not corrode if the wheel rim seal remains intact. If exposed to moisture, light surface rust is normal and does not affect performance.
Q: Can I replace just the tread or must I buy the full assembly?
A: SU 9139-EZ-A is sold only as a complete full assembly. The polyurethane tread is bonded to the steel core and cannot be separated or replaced. If tread is worn or damaged, you must purchase a new complete wheel.
Q: What happens if I use the wrong wheel diameter or width?
A: Using incorrect dimensions causes improper load distribution, accelerates bearing wear, reduces truck maneuverability, and may void the manufacturer warranty. Wrong-sized wheels can shift under load and create safety hazards. Always measure your old wheel or consult your truck manual before replacement.
Q: How do I verify SU 9139-EZ-A bearings are functioning properly?
A: Spin the wheel by hand and listen for grinding or scraping sounds. Bearings should spin freely for at least 3 to 5 seconds with minimal resistance. Any grinding, clicking, or immediate stop indicates bearing failure. If you hear noise, do not operate the truck. Replace the wheel immediately to prevent axle damage.