Product Description
Load Wheel
Frequently Asked Questions
Q: What is the load rating and material composition of SU 673?
A: The SU 673 is a 5-inch load wheel rated for 1,200 lbs per wheel. The tread is cast polyurethane over a steel wheel hub. Maximum fleet capacity is 4,800 lbs on four wheels. This wheel is designed for indoor warehouse use on smooth concrete and tile surfaces.
Q: Is the SU 673 compatible with Crown RC 5500 and Crown PE 4000 pallet jacks?
A: The SU 673 fits Crown RC 5500 models. It is not a direct fit for Crown PE 4000 without modification. The PE 4000 uses a narrower axle pocket. For PE 4000, use part number SU 673-PE instead. Cross-fitting without proper adapters will cause the wheel to rub the frame.
Q: How do I diagnose a flat spot or uneven wear pattern on SU 673?
A: Spin the wheel by hand and visually inspect the tread for flat spots or high spots. If you feel resistance or hear a clicking noise as the wheel rotates, the bearing is likely damaged. Roll the jack slowly and listen for thumping. Flat spots indicate the wheel locked during braking. Replace the wheel if the flat spot exceeds 0.5 inches.
Q: What is the installation procedure for SU 673?
A: Lift the jack with a hand pump or electric jack stand so the wheel clears the floor by 2 inches. Remove the retaining E-clip from the axle using needle-nose pliers. Slide the old wheel off and slide the new SU 673 wheel on, ensuring it seats flush against the axle shoulder. Reinstall the E-clip. Do not over-compress the clip or it will bind the wheel.
Q: How often should SU 673 wheels be inspected and what is their service life?
A: Inspect the wheel every 200 operating hours or monthly. Check for cracks, flat spots, and bearing play. Clean the polyurethane tread weekly with a damp cloth to remove dust and debris. The bearing is greased and sealed. Average service life is 1,500 to 2,500 operating hours depending on load and floor condition. Replace when tread depth is less than 0.25 inches.
Q: Why is tread material important on the SU 673 and what happens if I use it outdoors?
A: The polyurethane tread is formulated for indoor smooth surfaces and provides low rolling resistance. Using SU 673 outdoors on rough or gravel surfaces will accelerate tread wear and tear the tread material. For outdoor use, install a different wheel with rubber tread instead. Outdoor use voids the warranty.