1. Product Overview
This manual provides essential information for the Exmark 116-3872 Offset Hub, a genuine replacement part designed for specific Exmark lawn mower models. This hub is crucial for the proper function of your equipment's deck assembly.
Part Number: 116-3872 (Replaces previous part numbers 109-3538, 116-6211, LS0564B)
1.1 Compatibility
The Exmark 116-3872 Offset Hub is compatible with the following Exmark series and models. Always refer to your equipment's original owner's manual and serial number for precise fitment verification.
- Aerator 30
- Phazer
- Pioneer S-Series
- Quest S-Series
- Radius E-Series
- Radius S-Series
- Radius X-Series
- Specific models: ARX481CKA30000, ARX541CKA30000, SAR481KA30, SAR481KA30CA
Figure 1: Front view of the Exmark 116-3872 Offset Hub, showing the splined center bore and four studs, with a retaining nut.
2. Setup and Installation
Installation of the offset hub typically involves removing the old hub and securing the new one. Due to the technical nature of this component and its critical role in equipment operation, it is highly recommended to consult your specific Exmark equipment's service manual for detailed, step-by-step installation instructions. Improper installation can lead to equipment malfunction or damage.
2.1 General Guidelines
- Safety First: Always ensure the equipment is turned off, the engine is cool, and the spark plug wire is disconnected before performing any maintenance or installation.
- Tools: Gather all necessary tools as specified in your equipment's service manual.
- Component Orientation: Pay close attention to the orientation of the old hub during removal to ensure the new hub is installed correctly.
- Torque Specifications: Use a torque wrench to tighten fasteners to the manufacturer's specified torque values to prevent loosening or over-tightening.
Figure 2: Angled view of the Exmark 116-3872 Offset Hub, highlighting the offset design and the included retaining nut.
3. Operating Considerations
Once the offset hub is correctly installed, the equipment can be operated according to its standard operating procedures. The hub itself does not require specific operational steps beyond ensuring it is securely fastened and functioning as part of the larger assembly.
- Pre-Operation Check: Before each use, visually inspect the hub and surrounding components for any signs of looseness, wear, or damage.
- Listen for Unusual Noises: During operation, listen for any unusual noises or vibrations that might indicate an issue with the hub or related parts.
4. Maintenance
The Exmark 116-3872 Offset Hub is a durable component, but regular inspection is key to its longevity and the overall performance of your equipment. Specific maintenance schedules and procedures for this part will be outlined in your equipment's owner's manual.
4.1 Recommended Maintenance Practices
- Regular Inspection: Periodically check the hub for signs of wear, cracks, or corrosion. Ensure all fasteners are tight.
- Cleaning: Keep the area around the hub free from debris, grass clippings, and dirt to prevent buildup that could affect performance or accelerate wear.
- Lubrication: If your equipment's manual specifies lubrication points near the hub, follow those instructions carefully.
5. Troubleshooting
If you experience issues related to the wheel or deck assembly after installing or while using the Exmark 116-3872 Offset Hub, consider the following general troubleshooting steps. For specific diagnostic procedures, refer to your equipment's service manual.
- Vibration or Wobble: Check if the hub is securely fastened and if the wheel or other attached components are properly balanced and installed. Inspect for any damage to the hub itself or the shaft it mounts on.
- Unusual Noise: Investigate the source of the noise. It could indicate loose fasteners, worn bearings (if applicable to the assembly), or interference with other parts.
- Difficulty in Movement: Ensure there is no obstruction and that the hub is not binding. Verify proper lubrication if required.
If troubleshooting does not resolve the issue, contact an authorized Exmark service technician.
6. Specifications
| Specification | Detail |
|---|---|
| Part Number | 116-3872 |
| Replaces Part Numbers | 109-3538, 116-6211, LS0564B |
| Product Dimensions | Approximately 5 x 5 x 5 inches |
| Item Weight | Approximately 2.78 pounds |
| Manufacturer | Exmark |
7. Warranty and Support
As a genuine Exmark part, this offset hub is typically covered by Exmark's standard warranty for replacement parts. For specific warranty terms and conditions, please refer to the documentation provided with your original Exmark equipment or contact Exmark customer support directly.
For technical assistance, parts inquiries, or warranty claims, please contact Exmark customer service or visit the official Exmark website. When contacting support, have your equipment's model and serial number, along with the part number (116-3872), readily available.