Introduction
This manual provides essential information for the installation, operation, and maintenance of your Arnold MTD Genuine Parts 13-inch Replacement RZT Caster Wheel. This wheel is designed to ensure optimal performance and durability for compatible zero-turn mowers. Please read these instructions carefully before proceeding with installation or use.
Product Overview
The Arnold MTD Genuine Parts 13-inch RZT Caster Wheel is a direct replacement part engineered for specific zero-turn mower models. It is designed to restore proper maneuverability and support to your equipment.
- Compatibility: Fits RZT mowers with 50-inch and 54-inch decks, specifically those using 13-inch x 5.00-6-inch front wheels.
- OEM Replacement: Directly replaces original equipment part numbers 634-04711-0911 and 634-04321A-0911.
- Durable Construction: Features a grease-fitting tubeless tire with durable nylon bushing for extended service life.
- Dimensions: Measures 12.5 inches x 4.75 inches.
- Hub and Axle: Equipped with a 0.75-inch hub diameter and a 0.75-inch axle diameter.
Image 1: The Arnold MTD Genuine Parts 13-inch RZT Caster Wheel. This image displays the complete wheel assembly, including the tire and hub, ready for installation.
Installation Instructions
Before beginning installation, ensure the mower is turned off, the spark plug wire is disconnected, and the parking brake is engaged. For safety, wear appropriate personal protective equipment, including gloves and eye protection.
- Prepare the Mower: Park the zero-turn mower on a flat, stable surface. Use a jack or appropriate lifting device to safely raise the front of the mower, allowing the caster wheel to hang freely. Secure the mower with jack stands to prevent accidental lowering.
- Remove the Old Wheel: Locate the axle nut or retaining pin securing the existing caster wheel. Use appropriate wrenches or tools to remove it. Carefully slide the old wheel off the axle. Note the orientation of any washers or spacers for correct reassembly.
- Inspect the Axle: Clean the axle and inspect it for any damage or wear. Apply a thin layer of grease to the axle for easier installation and future maintenance.
- Install the New Wheel: Slide the new Arnold MTD Genuine Parts caster wheel onto the axle. Ensure any removed washers or spacers are reinstalled in their original positions.
- Secure the Wheel: Reinstall the axle nut or retaining pin. Tighten the nut securely, but do not overtighten, as this can damage the bearings or bushing. If a cotter pin was removed, install a new one.
- Inflate the Tire (if necessary): The tire may require inflation to the recommended pressure, typically found on the tire sidewall or in your mower's owner's manual.
- Lower the Mower: Carefully remove the jack stands and lower the mower to the ground.
- Test Operation: Reconnect the spark plug wire. Slowly move the mower to ensure the new wheel rotates freely and functions correctly.
Note: Some customer reviews mention the grease fitting might be on the opposite side of the air nozzle. Be aware of this during installation and future lubrication.
Operation Considerations
Once installed, the caster wheel operates as part of your mower's steering and support system. No specific operational steps are required for the wheel itself beyond ensuring it is properly installed and maintained.
- Regularly check the tire pressure to ensure it matches the manufacturer's recommendations.
- Inspect the wheel for any signs of damage, excessive wear, or loose components before each use of the mower.
- Avoid operating the mower on excessively rough terrain or at high speeds over obstacles, which can prematurely wear out the caster wheels.
Maintenance
Proper maintenance extends the life of your caster wheel and ensures safe operation of your mower.
- Lubrication: The wheel features a grease fitting. Periodically (e.g., seasonally or every 25 operating hours, refer to your mower's manual for specific intervals), apply grease using a grease gun to the fitting until a small amount of fresh grease appears around the bushing. This lubricates the nylon bushing and helps prevent wear.
- Tire Pressure: Maintain the recommended tire pressure. Under-inflation can lead to poor handling and increased wear, while over-inflation can reduce traction and ride comfort.
- Inspection: Regularly check the tire tread for wear and damage. Inspect the wheel hub and axle for any looseness, cracks, or signs of corrosion. Ensure all fasteners are tight.
- Cleaning: Keep the wheel and surrounding area free of grass clippings, dirt, and debris, which can interfere with proper rotation and accelerate wear.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Wheel does not spin freely. | Axle nut overtightened, lack of lubrication, debris in bushing. | Loosen axle nut slightly, apply grease to fitting, clean debris from around the bushing. |
| Excessive wobble or play in wheel. | Loose axle nut, worn bushing, damaged axle. | Tighten axle nut, inspect bushing for wear and replace if necessary, check axle for damage. |
| Tire loses air pressure quickly. | Puncture, faulty valve stem, improper bead seating. | Inspect tire for punctures and repair, check valve stem, ensure tire bead is properly seated on the rim. |
Specifications
| Model Number: | 490-325-M027 |
| Wheel Size: | 13 inches |
| Item Diameter: | 13 inches |
| Hub Diameter: | 0.75 inches |
| Axle Diameter: | 0.75 inches |
| Material: | Nylon (bushing) |
| Item Weight: | 5.88 pounds |
| Replaces OEM Part Numbers: | 634-04711-0911, 634-04321A-0911 |
| UPC: | 037049955206 |
Warranty and Support
For specific warranty information, please refer to the documentation included with your purchase or visit the official Arnold or MTD website. For technical support or replacement parts, contact Arnold customer service through their official channels. Always use genuine replacement parts to ensure compatibility and maintain product warranty.
You can visit the Arnold Store for more information: Arnold Store on Amazon
