Product Description
Load Wheel Assembly
Frequently Asked Questions
Q: What is included in the SU 9129-A load wheel assembly?
A: The SU 9129-A is a complete pre-assembled wheel kit that includes the 3.00 inch polyurethane tread wheel, the hub, the 20 mm sealed precision bearing, and mounting hardware. This assembly reduces installation time because the bearing is already installed and aligned in the hub. You only need to slide the entire unit onto the truck axle and secure with the retaining nut and bolt.
Q: Can I install the SU 9129-A assembly on any electric pallet truck?
A: The SU 9129-A fits trucks with axle diameters that match the 20 mm bearing bore and axle lengths of 3 to 4 inches. Before ordering, verify your truck axle specifications using the model number or part diagram. The assembly bolt hole pattern must also match your truck frame. If your truck uses a different bearing bore size or axle length, the assembly will not fit without modification.
Q: Does the SU 9129-A assembly include lubrication, or do I need to add grease?
A: The bearing in the SU 9129-A assembly arrives pre-lubricated and sealed from the factory. Do not add additional grease to the bearing. However, lubricate the axle contact surfaces lightly with general-purpose machine oil or chassis grease before sliding the assembly onto the truck axle. This reduces friction during installation and protects the axle from corrosion.
Q: How long does the SU 9129-A assembly last before I need to replace it?
A: Expected lifespan is 2000 to 4000 operating hours or 1 to 3 years of typical warehouse use, depending on floor surface and load cycles. Polyurethane tread wears faster on rough concrete or outdoor surfaces. Monitor for tread wear, bearing noise, or axial play. Once tread is worn to one-half original thickness or bearing play is visible, replace the assembly. Sealed bearings cannot be serviced; if the bearing fails, replace the entire SU 9129-A assembly.
Q: What is the installation time for the SU 9129-A compared to replacing individual wheel components?
A: Installation time for SU 9129-A assembly is approximately 15 to 20 minutes per wheel, compared to 30 to 45 minutes for replacing individual wheel and bearing components. The assembly is faster because the bearing is pre-installed and aligned. You eliminate bearing installation, alignment, and torque verification steps. This reduces labor cost and reduces risk of bearing misalignment.
Q: Is the SU 9129-A assembly interchangeable with the standard SU 9129 wheel?
A: Yes and no. The wheel diameter and tread specifications are identical. However, SU 9129-A is a complete assembly, while SU 9129 is typically the wheel only. They both mount to the same axle bore (20 mm) and fit the same trucks. You can install either one, but the assembly version is pre-configured and faster to install.