Product Description
Caterpillar GWK-NPP60-LW-XL Load Wheel Kit features 97A polyurethane wheels with steel cores, sealed bearings, and Grade 8 hardware for high duty cycle service on Caterpillar NPP60 electric pallet jacks.
Compatibility: Fits pallet jacks made by Caterpillar, model NPP 60. Alternate model: NPP60. SKU: GWK-NPP60-LW-XL
Specifications
Material & Construction
| Wheel Material | 97A polyurethane tread over steel core |
| Core Material | Carbon steel, ASTM 1045 |
Part Numbers
| Manufacturer Part Number | GWK-NPP60-LW-XL |
| OEM Part Number | CAT GWK-NPP60-LW-XL |
| Compatible Models | Caterpillar NPP60 Electric Pallet Jack |
Performance
| Polyurethane Hardness | 97A (ASTM D2240) |
Frequently Asked Questions
Q: What is the core material in the GWK-NPP60-LW-XL wheels, and why does it matter?
A: The GWK-NPP60-LW-XL wheels have 97A polyurethane tread bonded over a carbon steel core (ASTM 1045). The steel core prevents wheel deflection and flat-spotting under heavy load, critical for high-duty applications. This design provides superior load-carrying capacity compared to solid polyurethane wheels.
Q: What pallet jack models are compatible with the GWK-NPP60-LW-XL?
A: The GWK-NPP60-LW-XL fits Caterpillar NPP60 and NPP 60 electric pallet jacks. It is the heavy-duty variant for the same jack platform. Do not use this kit on NPP40 or any other model. Verify the model on your jack nameplate before ordering.
Q: What is the hardness difference between the standard 95A and the XL 97A wheels, and what does it mean for performance?
A: The XL variant uses 97A hardness (measured per ASTM D2240) compared to the standard 95A. This 2-point durometer increase means the XL wheels are slightly harder and more resistant to tread degradation. The trade-off is marginally reduced grip on wet or oily floors. Use 97A for long-duty applications; use 95A for mixed floor conditions.
Q: What fastener grade is used in the GWK-NPP60-LW-XL kit?
A: The GWK-NPP60-LW-XL includes Grade 8 hardware. Grade 8 fasteners provide higher tensile strength and are less prone to loosening under vibration compared to Grade 5. Inspect fastener tightness monthly on high-duty equipment, as prolonged operation can cause minor relaxation.
Q: How do I know if I need the XL kit instead of the standard GWK-NPP60-LW?
A: Choose the GWK-NPP60-LW-XL if your operation runs more than 6 hours daily, handles maximum rated loads consistently, or if you notice rapid tread wear on standard wheels (less than 12 months). The steel-core design and 97A compound will extend service intervals in high-duty scenarios.
Q: What is the expected lifespan of the GWK-NPP60-LW-XL wheels in high-duty service?
A: In high-duty operation (8+ hours daily), the steel-core 97A wheels typically deliver 24 to 36 months of service. The steel core prevents premature flat-spotting that shortens standard wheel life. However, continuous overloading or rough flooring will still degrade wheels faster. Rotate wheels side-to-side every 12 months if wear appears uneven.
