Product Description
Load Wheel Assembly
Specifications: 8.000 inch diameter x 4.000 inch width (8.000" x 4.000" | 8 x 4 wheel | 8 x 4 | 203.20mm x 101.60mm)
Specifications
Wheel Dimensions
| Outside Diameter | 8 |
| Inside Diameter | 2.25 |
| Width Side to Side | 4 |
| Bore Depth | 0.63 |
| Bore Outside Diameter | 2.4404 |
Frequently Asked Questions
Q: What does the A designation mean on SU 684-EZ-A?
A: The A suffix on SU 684-EZ-A indicates this is a complete load wheel assembly rather than a single wheel component. It includes the wheel, integrated bearing, and axle mounting provisions pre-assembled and ready for installation onto your lift truck frame.
Q: Is SU 684-EZ-A equivalent to SU 684-A?
A: No. SU 684-EZ-A and SU 684-A are not interchangeable. SU 684-EZ-A is an idler caster assembly designed for front steering axles. SU 684-A is a load wheel assembly for primary load-bearing axles. Although both are 8x4 wheels, their bearing grades, hardness, and intended applications differ. Installing the wrong assembly type will cause steering or load-bearing failure.
Q: Can SU 684-EZ-A be retrofitted to older lift trucks?
A: SU 684-EZ-A can be retrofitted to older electric lift trucks only if the original truck used an 8x4 idler caster wheel assembly with matching bore dimensions (2.25 inch ID, 2.4404 inch OD). Check your truck manual or original part number to confirm compatibility. The mounting flange design and bearing pre-load settings must also match to ensure safe operation.
Q: What is the maximum load rating for SU 684-EZ-A?
A: SU 684-EZ-A is rated as an idler caster only and does not carry main load. Maximum load is determined by the truck frame and axle assembly, typically 300 to 500 pounds per idler wheel depending on truck class. Exceeding this load will cause premature bearing failure. Always refer to your truck manufacturer specifications for load limits.
Q: Does SU 684-EZ-A require any setup or adjustment after installation?
A: SU 684-EZ-A comes pre-assembled. After installation, spin the wheel by hand to verify smooth rotation with no grinding or binding. Check bearing preload by lifting the truck wheel slightly off the floor and attempting minimal side-to-side movement at the wheel rim. Bearing play of more than 1/16 inch indicates improper installation or bearing wear. Re-install and re-check if movement is excessive.
Q: How should SU 684-EZ-A be stored before installation?
A: Store SU 684-EZ-A indoors on a clean, dry shelf or bench. Keep the assembly protected from dust and moisture to prevent bearing corrosion. Do not store the assembly lying on its side for extended periods as this can damage bearing seals. Keep the original packaging if available. Install the assembly within 12 months of receipt for optimal bearing condition.