GW L20

Frequently Asked Questions

Q: What are the key specifications of the GW L20 load roller?
A: The GW L20 is a 3.25-inch diameter load wheel assembly with a 3.875-inch width. It features a steel hub with black polyurethane tread, sealed 6204RS precision ball bearings, and a non-marking outer surface. The polyurethane material provides low rolling resistance and does not leave marks on clean floors. This assembly is rated for standard manual pallet jack applications in general warehouse environments.

Q: How does the GW L20 differ from the GW L21?
A: The GW L20 has a 3.25-inch diameter and 3.875-inch width, while the GW L21 is smaller at 3 inches diameter and 3.75 inches width. Both use polyurethane treads and 6204RS bearings. The GW L20 is suitable for standard 27-inch by 48-inch fork platforms. The GW L21 is designed for compact or narrower jack configurations. Do not interchange them; verify your jack frame dimensions before ordering.

Q: What is the 6204RS bearing in the GW L20 and can it be replaced separately?
A: The 6204RS is a sealed, deep-groove ball bearing with 2RS seals on both sides to keep contaminants out. The RS designation means the seals are permanently affixed and provide a sealed environment for the bearing races. In most manual jack applications, the GW L20 assembly is replaced as a complete unit rather than servicing the bearing alone. Attempting to disassemble the sealed bearing will destroy the seals and void the assembly.

Q: When should I replace the GW L20 and what are the warning signs?
A: Replace the GW L20 if the polyurethane tread shows deep cracks, significant flat spots, or uneven wear. If the roller makes a grinding or squeaking noise, or if it does not spin freely by hand, the bearing or tread may be failing. If the jack pulls to one side or the load sits uneven, inspect all load rollers and replace any with visible damage. Non-marking surface wear that leaves black residue on floors indicates the tread is separating and replacement is needed soon.

Q: Can the polyurethane tread of the GW L20 be cleaned or restored?
A: Yes. Clean the polyurethane tread with a damp cloth and mild detergent to remove dirt and floor residue. Dry thoroughly. This restores grip and reduces rolling resistance. However, deep wear or cracks cannot be repaired and require replacement. Do not use abrasive cleaners or solvents, which can damage the polyurethane. Regular cleaning extends tread life and improves jack performance.

Q: Is the GW L20 suitable for all floor types?
A: The GW L20 polyurethane non-marking tread is best suited for clean, smooth concrete and polished floors common in modern warehouses and clean rooms. It performs well on sealed asphalt. On rough concrete, gravel, or outdoor surfaces, the tread wears faster and rolling resistance increases. For rough environments, consider a harder compound roller. The non-marking feature makes it ideal for food, pharmaceutical, and electronics facilities where floor marking cannot be tolerated.