Videos Guide How to Change 19.5 Load Range G Tires
Changing a 19.5 Load Range G tire can be a challenging task due to its unique characteristics, including the weight of the assembly, the thick bead, and the non-compliant sidewall. However, with the right tools and techniques, the process can be made much easier and safer. In this guide, weโll walk you through the step-by-step process of changing a 19.5 Load Range G tire using the ย Coats MAXX 80 Rim Clamp Tire Changer with the MAXX Wheel Lift and a steel duckhead.
Understanding the Challenges of 19.5 Load Range G Tires
The Unique Nature of Load Range G Tires
Load Range G tires, particularly in the 19.5 size, are known for their durability and heavy-duty performance. These tires are often used on commercial vehicles, making them essential for businesses that rely on transportation. However, their robust design also makes them difficult to change, especially without the proper equipment.
Why the Coats MAXX80 Tire Changer?
The Coats MAXX 80 Tire Changer is specifically designed to handle the toughest tires, including the 19.5 Load Range G. Equipped with the MAXX Wheel Lift, this machine allows for safe and efficient tire changes, reducing the physical strain on the operator and ensuring a secure and precise fit.
Step 1: Inspecting the Tire and Wheel Assembly
Before beginning the tire change process, itโs crucial to inspect the tire and wheel assembly. Look for any signs of damage or abnormalities on both the tire and the wheel. This step helps identify any issues that could complicate the tire change or affect the safety of the vehicle.
Removing the Valve Core
Ensure the valve core is removed, and all air pressure has been released from the tire. This step is vital for preventing accidents and making the tire easier to handle during the bead loosening process.
Step 2: Loosening the Bead
Using the side-mounted bead loosener on the Coats MAXX 80, carefully loosen the bead of the tire. For the 19.5 Load Range G, itโs best to take several small bites rather than trying to loosen the bead in one go. This method reduces the risk of damaging the tire or the wheel.
Step 3: Placing the Tire and Wheel on the Tire Changer
Utilizing the MAXX Wheel Lift
The 19.5 Load Range G tire is heavy, so using the MAXX Wheel Lift is highly recommended. This tool not only makes it easier to place the tire and wheel on the machine but also enhances safety by reducing the risk of injury from lifting heavy assemblies manually.
Clamping the Wheel
Once the tire and wheel are on the machine, itโs essential to clamp the wheel from the outside in. For 19.5 wheels, this technique ensures a secure grip and prevents the wheel from slipping during the tire change process. The Coats MAXX 80 Tire Changer is equipped with Grip Max 2 Jaws and traditional steel jaws, both of which can be used to clamp the wheel securely.
Step 4: Using the Robo Arm and Roller
The Coats MAXX 80 features a Robo arm and Robo roller, which are invaluable tools for changing tough tires like the 19.5 Load Range G.
Positioning the Robo Roller
The Robo roller helps to push down the sidewall of the tire, creating enough space to adjust the duckhead and ensuring the top bead is properly lubed. This tool also makes it easier to insert the tire tool under the duckhead, facilitating a smoother dismounting process.
Step 5: Dismounting the Top and Bottom Beads
Top Bead Dismounting
With the tire tool in place under the duckhead, use the Robo arm to push down on the tireโs sidewall. This action allows the tire to slide into the drop center, making it easier to pull the top bead over the duckhead. Rotate the tire clockwise to complete the dismounting of the top bead.
Bottom Bead Dismounting
The bottom bead can be tricky due to the weight and rigidity of the 19.5 tire. If the tire is too heavy to hold into the drop center manually, use the hook on the Robo arm to lift the tire into position. Once the bottom bead is lifted over the duckhead, rotate the tire clockwise to dismount the bottom bead completely.
Step 6: Mounting the New Tire
Applying Quality Paste Lube
Before mounting the new tire, apply a good-quality paste lube to both the inside and outside of the tire beads. Additionally, apply some lube to the drop center of the wheel. This step is crucial for ensuring that the tire mounts smoothly and without damage.
Mounting the Bottom Bead
Position the bottom bead of the tire over the duckheadโs tail and under its head. This alignment is critical for a successful mount. The Robo roller and Robo arm will again be used to control the tire during the mounting process.
Mounting the Top Bead
To mount the top bead, start by setting the Robo roller to hold the tire up over the duckโs tail. Then, use the Robo arm to push the tire into the drop center. As the tire rotates, gradually relieve pressure on the Robo arm and lift the Robo roller to ensure the tire bead stays in place. Continue rotating until the top bead is fully mounted.
Step 7: Final Steps โ Seating the Beads and Inflating the Tire
With the tire mounted, the final step is to seat the beads and inflate the tire. Begin by using the tire machineโs inflation system to seat the bead. However, the rest of the inflation process should be done in a proper restraining device to ensure safety.
Changing a 19.5 Load Range G tire may seem daunting, but with the right equipment and techniques, it can be done efficiently and safely. The Coats MAXX 80 Tire Changer, combined with the MAXX Wheel Lift and Robo arm tools, makes this process much more manageable.
For more tips and tutorials, make sure to view the rest of our Coats Tough 2 Change Series on YouTube and subscribe to our Channel. If you need assistance or service, visit coatscompany.com/contact or call 1-800-688-6359.
Disclaimer: Always follow safety guidelines and refer to the user manual for specific instructions related to your equipment.