Product Description
L/W Assy, Poly 97A Zz Brgs
Specifications: 3.250 inch diameter x 4.500 inch width (3.250" x 4.500" | 3.25 x 4.5 wheel | 3-1/4 x 4-1/2 | 82.55mm x 114.30mm)
Specifications
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 4.5 |
| Tread Profile | Angle |
| Bore Depth | 0.71 |
| Hub Width | 4.5 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What are the exact dimensions and load capacity for the SU S163-XL-A2 wheel assembly?
A: The SU S163-XL-A2 is a 3.250 inch outside diameter x 4.500 inch width (82.55mm x 114.30mm) polyurethane load wheel with 97A durometer rating. Inside diameter is 1.938 inch with a 2.0467 inch bore outside diameter and 0.71 inch bore depth. This assembly uses sealed ZZ bearings and is rated for electric lift truck applications up to the load class specified in your truck documentation. Always verify your truck model serial number before ordering to ensure compatibility.
Q: Is the SU S163-XL-A2 compatible with Cushothane XL and Yale or Hyster electric lift trucks?
A: The SU S163-XL-A2 features a Cushothane XL polyurethane compound and ZZ sealed bearings. Cross-reference compatibility depends on your truck model and serial range. Contact the manufacturer with your truck model, serial number, and current wheel part number for confirmation. Some Yale and Hyster models use equivalent assemblies under different part numbers. Do not assume interchangeability based on wheel diameter alone because wheel width, bore configuration, and bearing type must match exactly.
Q: How do I diagnose if the SU S163-XL-A2 wheel needs replacement?
A: Replace the wheel assembly if you observe flat spots or chunks missing from the tread, the wheel does not roll freely when manually rotated, bearing seals are cracked or grease is leaking, or the wheel has visible cracks in the polyurethane compound. On load wheels, check for uneven wear patterns that suggest misalignment. If the truck pulls to one side during operation, inspect both drive and load wheels for wear. A worn wheel will produce a rumbling or grinding noise during operation.
Q: What tools and steps are required to install the SU S163-XL-A2 assembly on an electric lift truck?
A: Lift the truck safely using a jack rated for your truck weight class. Remove the cotter pin and castle nut or retaining bolt securing the old wheel. Slide the old wheel off the axle and inspect the axle for damage or corrosion. Clean the axle thoroughly. Slide the new SU S163-XL-A2 assembly onto the axle, ensuring the bore is properly seated. Reinstall and torque the retaining bolt or castle nut to your truck manufacturers specification, then secure with a new cotter pin. Always use a torque wrench and do not exceed recommended torque to avoid bearing damage. Lower the truck and test that both wheels rotate freely.
Q: Does the SU S163-XL-A2 require periodic lubrication or maintenance?
A: The SU S163-XL-A2 uses sealed ZZ bearings that are pre-greased and do not require additional lubrication during normal operation. The sealed design protects against dirt and moisture. However, inspect bearings every 6 months for leakage or noise. If grease begins to leak from the bearing seals, the bearing assembly has failed and must be replaced. Do not attempt to regrease ZZ sealed bearings as this will cause pressure buildup and premature failure. Typical wheel assembly lifespan is 2-5 years depending on duty cycle and load.
Q: Can the SU S163-XL-A2 be used on rough or outdoor surfaces?
A: The Cushothane XL polyurethane compound is designed for controlled indoor environments and smooth floors. It does not perform well on gravel, dirt, or severely rough concrete. Extended outdoor use will accelerate tread wear and may cause tread chunking. If your truck operates primarily outdoors or on rough surfaces, consult the manufacturer about polyurethane wheel alternatives with higher durometer ratings (105A-110A) or elastomer options designed for rough-terrain applications.
