Product Description
Ultra-polyurethane load wheel kit (durometer 70D) for manual pallet jack applications. Kit includes dual 2.875 inch OD x 3.875 inch wide wheels pre-assembled with precision ball bearings, case-hardened alloy steel axles, and spring-steel retention roll pins. Suitable for manual pallet trucks utilizing 0.75 inch diameter axles. Wheel hub designed for non-marking use, with ultra-poly tread for enhanced durability on concrete and wood surfaces.
Compatibility: Fits pallet jacks made by Dayton, model 478N31. SKU: GWK-478N31-LW
Specifications
Material & Construction
| Wheel Tread Material | Ultra-Polyurethane, durometer 70D |
| Axle Material | Alloy steel, case hardened |
Part Numbers & Compatibility
| Manufacturer Part Number | GWK-478N31-LW |
Frequently Asked Questions
Q: What are the exact wheel dimensions for GWK-478N31-LW, and why do they matter?
A: GWK-478N31-LW wheels are 2.875 inches outer diameter and 3.875 inches wide. The 0.75 inch axle diameter is critical: this kit only fits Dayton pallet jacks with 0.75 inch diameter axles. Verify your jack model number and axle diameter before ordering. Using wheels with the wrong axle fit will cause excessive wheel play, poor steering, and risk of wheel detachment. Measure the axle diameter with calipers if the model number is unclear.
Q: What material are the axles, and do they resist corrosion?
A: GWK-478N31-LW includes case-hardened alloy steel axles. Case hardening creates a very hard surface that resists wear from bearing races. These axles are more durable than standard steel but are not stainless and will rust if exposed to moisture or salt spray. If your jack is used outdoors or in a humid environment, inspect axles quarterly for surface rust. If rust develops, clean with a wire brush or light grinding and apply a thin coat of light machine oil.
Q: Are the retention roll pins included, and what is their purpose?
A: Yes, GWK-478N31-LW includes spring-steel retention roll pins. These pins prevent the wheel from sliding off the axle during operation. Do not omit the pins when installing. Pins should be pressed or driven into the axle hole until they are snug but do not over-drive and bend them. If a pin breaks, remove it completely and order a replacement. A missing pin will cause the wheel to shift, creating noise and uneven loading.
Q: What is different about ultra-poly tread compared to standard polyurethane?
A: Ultra-poly tread at 70D durometer is harder, more wear-resistant, and longer-lasting than standard 92A polyurethane. Ultra-poly resists flat-spotting, does not compress under heavy sustained loads, and maintains traction on concrete and wood. The trade-off is slightly less shock absorption, which is acceptable on most warehouse floors. Ultra-poly is the correct choice for Dayton jacks used in heavy-duty industrial environments.
Q: How do I install GWK-478N31-LW wheels correctly, and what is the correct load limit?
A: Installation steps: (1) Lower and secure the jack to prevent movement. (2) Remove fasteners and old wheels. (3) Press or drive the new wheels onto the 0.75 inch axles using a rubber mallet. (4) Install retention roll pins into the axle holes. (5) Tighten all fasteners to snug fit. (6) Test roll the jack freely before loading. Load capacity is determined by your Dayton jack model, not the wheels. Check the nameplate. Do not exceed rated capacity.
Q: What symptoms indicate that GWK-478N31-LW wheels are failing?
A: Replace wheels if you experience dragging or resistance when rolling freely, visible flat spots or cracks in the tread, squeaking or grinding noise, or excessive play when you move the wheel side-to-side by hand. Test each wheel by hand-spinning it. A healthy wheel spins freely for 5+ rotations with no noise. If rotation stops quickly or you hear grinding, the bearing is failing. Order a replacement wheel assembly for that position.