SU 627-A

Frequently Asked Questions

Q: What cross-references are available for SU 627-A and what makes them equivalent?
A: SU 627-A is equivalent to SU 627-XL-A and compatible with select aftermarket replacement models for lift truck and pallet jack applications. These parts share identical dimensions (3.25 inch OD x 2.0 inch width), bore specifications (0.75 inch ID with precision bearings), and 800 lb rated load capacity. When sourcing replacements, verify the specific bore diameter and bolt pattern match your equipment. Contact the original equipment manufacturer if cross-reference documentation is unclear.

Q: Is the SU 627-A compatible with my electric pallet jack that originally used a different wheel assembly?
A: Compatibility depends on three factors: bore diameter must be 0.75 inch ID, wheel width must be 2.0 inches, and bolt hole pattern must match. The SU 627-A is designed for electric pallet jacks and lift trucks using these specifications. Measure your existing wheel bore with calipers and count the bolt holes. If the original wheel is stamped with a part number, cross-reference it against SU 627-A compatibility databases. When in doubt, consult the original equipment manual or manufacturer.

Q: What does the 800 lb rated load capacity mean for SU 627-A and how is it calculated?
A: The 800 lb rated load capacity is the maximum sustainable load per wheel under normal duty cycle conditions (8 to 10 hours daily on smooth concrete). On a four-wheel truck, total safe load is approximately 3200 lbs. Capacity varies with duty cycle intensity. Under severe duty (continuous operation, rough surfaces, frequent shock), derate capacity to 600 to 650 lbs per wheel. Calculate your application load by dividing total truck load by the number of wheels and compare to the duty cycle rating.

Q: How do I diagnose bearing wear on SU 627-A wheels and when should they be replaced?
A: Bearing wear symptoms include grinding or clicking sounds when the wheel rotates, lateral wobble at the wheel edge despite a tight axle nut, or the wheel feeling gritty when spun by hand. Test by lifting the truck on a jack, spinning the wheel, and listening for noise. Feel for smoothness. Bearing replacement requires pressing out old bearings and pressing in new 0.75 inch ID precision bearings. SU 627-A wheels typically need bearing service every 24 to 36 months depending on duty cycle. Replace the entire wheel assembly if bearing replacement is not cost-effective.

Q: What installation steps are required to fit SU 627-A wheels on my electric pallet jack?
A: Installation takes approximately 15 minutes per wheel and requires a wrench or socket, jack, and wheel blocks for safety. Lift the truck with a floor jack under the frame, not the wheel well. Block the truck with wheel blocks to prevent rolling. Remove the axle retaining nut, slide off the old wheel, position the SU 627-A wheel onto the axle, and reinstall the retaining nut hand-tight. Verify the wheel spins freely without binding. Tighten the nut securely. Repeat for all four wheels. Lower the truck and test handling before resuming normal operation.

Q: What maintenance extends the service life of SU 627-A wheels to maximum lifespan?
A: Clean wheels monthly with a dry brush to remove dust, debris, and contaminants. Inspect tread quarterly for visible cracks, chunks, or separation. Check bearing function by spinning each wheel and listening for grinding. Rotate wheels every 6 to 8 months to equalize wear. Lubricate bearing seals with light machine oil annually, but do not over-grease as excess lubricant attracts dirt. Replace wheels when tread wear reaches 1/8 inch remaining or when bearing noise indicates seal degradation. Proper maintenance typically extends service life to 24 to 36 months.