Product Description
SU 663 Polyurethane Load Wheel for electric pallet trucks manufactured by Liftsplus.com. Features a 3.00 inch diameter, 3.66 inch width, 20 mm sealed precision bearing bore, and durable non-marking polyurethane tread (Shore A 92–97) with a machined cast iron core. Designed for straight axle mounting and suitable for heavy-duty industrial use on electric lift trucks.
Specifications
Material
| Tread Material Specification | Polyurethane (ISO/DIN industry grade) |
| Core Material Specification | Cast iron, machined finish |
Part Numbers
| Manufacturer Part Number | SU 663 |
| OEM Part Number | SU S663 |
Frequently Asked Questions
Q: What are the dimensions and specifications for the SU 663 load wheel?
A: The SU 663 is a 3.00 inch diameter by 3.66 inch width polyurethane load wheel. It features a 20 mm sealed precision bearing bore. Material is non-marking polyurethane with Shore A hardness rated 92 to 97. Core material is machined cast iron. The wheel is designed for straight axle mounting and heavy-duty industrial electric lift truck applications.
Q: What does non-marking polyurethane mean and when should I use it?
A: Non-marking polyurethane does not leave black rubber marks or streaks on floors, making it ideal for clean environments like food processing plants, pharmaceutical warehouses, or retail stores. The tread is formulated to minimize discoloration transfer to the floor. If your facility requires clean floor appearance or has specific marking restrictions, the SU 663 non-marking formulation is required. Standard black polyurethane may mark light-colored floors.
Q: Is the SU 663 compatible with my existing 3-inch diameter lift truck wheel mounting?
A: The SU 663 is a 3.00 inch diameter wheel with a 20 mm sealed bearing bore. Before ordering, measure your existing wheel and verify the bore size is 20 mm. A 3-inch wheel is not interchangeable with 5-inch wheels. Verify your lift truck model and axle specification in the maintenance documentation. Mismatched wheel sizes can affect lift truck performance and handling.
Q: What is the OEM part number and cross-reference information for the SU 663?
A: The manufacturer part number is SU 663. The OEM part number is SU S663. This wheel is used in Raymond, Hyster, and other lift truck brands that specify 3-inch wheels with 20 mm bearing bores. When ordering replacement wheels, always provide your lift truck model and current part number for verification. Cross-reference with your lift truck manual to ensure exact compatibility.
Q: What maintenance and inspection schedule is recommended for the SU 663?
A: Inspect SU 663 wheels monthly for tread wear, cracks, or chunks missing from the tread surface. Listen for bearing noise during operation. Check bearing movement by grasping the wheel and applying side pressure, there should be no play. The sealed bearing does not require lubrication. Replace wheels when tread is worn to 50 percent or less of original depth, typically every 600 to 1000 operating hours depending on use intensity.
Q: How do I install the SU 663 wheel and what tools are required?
A: The SU 663 slides onto a straight 20 mm axle shaft. The sealed bearing is preinstalled and requires no additional bearing installation. Mount the wheel by sliding it onto the clean, dry axle shaft until it seats against the axle shoulder. No pressing is required as the bearing bore is designed for easy axle fitment. After installation, verify free rotation with no grinding noise and no lateral wobble.