Product Description
Load Wheel
Frequently Asked Questions
Q: What equipment types are compatible with the SU 339 load wheel?
A: The SU 339 wheel fits Yale, Hyster, and Nissan electric pallet jacks and walkie stackers manufactured 2010 and later. Wheel diameter is 7 inches with 2-inch width. The 7-inch size provides better weight distribution than 6-inch wheels on heavier-duty equipment rated above 5000 pounds.
Q: Can I upgrade from SU 329 to SU 339 wheels on my truck?
A: No. Do not attempt to use SU 339 7-inch wheels on equipment designed for SU 329 6-inch wheels. The larger wheel diameter changes the load angle and creates improper bearing alignment. This will result in accelerated wear and potential bearing seizure. Use only the wheel size specified in your equipment manual.
Q: How do I measure the SU 339 wheel to determine if replacement is needed?
A: Measure the wheel diameter at the center running surface using calipers. Factory specification is 7.000 inches. Replace the wheel when diameter drops below 6.750 inches. Inspect the tread for hardness by pressing a thumbnail into the rubber. If rubber does not indent or shows cracks, the wheel has lost grip and must be replaced regardless of diameter.
Q: What is the maximum load rating for the SU 339 wheel assembly?
A: The SU 339 wheel supports up to 5500 pounds per wheel on smooth indoor concrete. The 7-inch diameter distributes loads more evenly than smaller wheels. Do not exceed this rating and do not use on outdoor surfaces, ramps, or rough concrete as this will cause premature tire deterioration and bearing failure.
Q: Is the SU 339 wheel equivalent to any OEM parts?
A: Yes. The SU 339 is equivalent to Yale YL-588721609 and Hyster HY 1438967. All three use the same 7-inch diameter, 2-inch width, and standard axle bore. Verify your equipment serial range falls within 2010-current before ordering as earlier models use different dimensions.