Product Description
Heavy-duty load wheel kit, OEM part number GWK-MJ55-N48-LW, designed for Maxx Jack MJ55-N48 manual pallet jack. Includes ultra-polyurethane wheels (70D), high-tensile steel core, ball bearings, axle, and roll pin. Wheel dimensions: 3-1/8 inch diameter x 3-1/4 inch width; bushing size 16 mm ID x 20 mm OD. Suitable for continuous manual duty material handling applications.
Compatibility: Fits pallet jacks made by Maxx Jack, model MJ55. SKU: GWK-MJ55-N48-LW
Specifications
Material & Construction
| Wheel Core Material | High-tensile steel core |
| Bearing Material | Chrome steel (SAE 52100) |
| Axle Material | Alloy steel, hardened |
Part Numbers
| OEM Part Number | GWK-MJ55-N48-LW |
| Manufacturer Part Number | GWK-MJ55-N48-LW |
| Compatible Models | Maxx Jack MJ55-N48 manual pallet jack |
Frequently Asked Questions
Q: Is GWK-MJ55-N48-LW compatible with the standard MJ55 or only N48?
A: GWK-MJ55-N48-LW is designed exclusively for Maxx Jack MJ55-N48 manual pallet jacks with 48 inch fork length and 20.5 inch fork width. Do not use on standard MJ55 or W48 models. The wheel diameter, bushing ID (16 mm) and OD (20 mm), and axle geometry are specific to N48 fork ends. Installing on the wrong model will result in misalignment and early bearing failure.
Q: What are the exact wheel dimensions for GWK-MJ55-N48-LW?
A: Wheels are 3-1/8 inch diameter x 3-1/4 inch width. Bushing size is 16 mm ID (inner diameter) x 20 mm OD (outer diameter). Material is high-tensile steel core with ultra-polyurethane (70D) molded tread. These dimensions must match your fork-end pockets exactly. If your existing wheels are different sizes, you have the wrong model jack and should verify part compatibility.
Q: Does GWK-MJ55-N48-LW include axles, bearings, and fasteners?
A: Yes. GWK-MJ55-N48-LW includes ultra-polyurethane wheels, high-tensile steel core, ball bearings (chrome steel SAE 52100), hardened alloy steel axle, roll pin, and fasteners. It is a complete load-wheel assembly replacement. If you need to retain your existing axles due to custom modifications, confirm compatibility with your supplier before installation.
Q: How do I diagnose if my N48 load wheels need replacement?
A: Symptoms of worn or failing load wheels include: flat spots visible on the tread, audible grinding or squeaking when rolling, visible bearing play (wiggle test), or polyurethane chunks missing from the wheel. If the jack is harder to push or does not roll smoothly on flat floor, wheels are likely damaged. Inspect every 6 months during routine maintenance. Replace proactively before bearing damage spreads.
Q: What is the installation process for GWK-MJ55-N48-LW?
A: Remove the jack forks from storage. Lift the jack frame safely on blocks. Remove the existing axle pin and slide off the old wheels. Press off old bearings if reusing the axle (not recommended). Install new bearings onto the new wheels, align the wheel assembly on the axle, and secure with the roll pin. Torque per manufacturer specs. Typical labor is 30 to 45 minutes per wheel if you have a bearing press. Test-roll the jack before returning to service.