*A Close Look at Changing the Tire of a Caterpillar 990 Wheel Loader*
Today’s video offers an up-close view of a complex operation: changing the tire on a Caterpillar 990 wheel loader right at its worksite. This massive machine requires specialized equipment and a skilled team to handle the job safely and efficiently. From lifting the loader to removing the tire and installing a replacement, each step is handled with precision. Here, we’ll walk through the process and take a look at the specs that make the Caterpillar 990 such a formidable piece of equipment.
*Caterpillar 990 Wheel Loader: Key Specs*
The Caterpillar 990 is built for heavy-duty operations, capable of handling demanding tasks in mining, construction, and material handling. Here are some key specifications that highlight its power and capacity:
Operating Weight: Around 80 tons (160,000 pounds). This weight gives the 990 the stability needed for handling heavy loads but also makes it a challenge to lift and move when maintenance is required.
Bucket Capacity: Typically between 11-13 cubic yards. This high-capacity bucket allows the 990 to move large volumes of material efficiently, making it a valuable asset on large-scale sites.
Engine Power: The Caterpillar 990 is equipped with a powerful Cat 3516B engine that delivers approximately 699 horsepower. This power allows the loader to handle demanding terrain and loads without straining.
Tire Size: 45/65-45. The massive tires are designed to support the loader’s weight and navigate rugged terrain, but they’re heavy and require specialized handling for any replacements or repairs.
*Step 1: Preparing the Caterpillar 990 for Lifting*
The first step in replacing the tire on a machine as large as the 990 is safely lifting it off the ground. Given its 80-ton weight, a precise, controlled approach is essential. The team uses industrial-grade hydraulic jacks to raise the back of the loader, positioning them carefully under reinforced points to keep the loader stable. The goal is to lift the machine just enough to safely remove and replace the tire while keeping everything balanced.
Once lifted, the loader is stabilized to prevent any movement during the process. The crew verifies that all points are secure before moving on to remove the tire, ensuring safety for both the machine and the team.
*Step 2: Removing the Tire*
With the Caterpillar 990 securely lifted, the team begins the task of removing the worn or damaged tire. Each of the loader’s tires can weigh thousands of pounds, so this step requires specialized tools and caution. A pneumatic impact wrench is used to loosen the large lug nuts that keep the tire in place.
After removing the lug nuts, the team carefully maneuvers the tire away from the loader. This typically involves using a forklift or crane to handle the tire’s weight safely.
*Step 3: Sending the Tire for Repair and Installing a Replacement*
Once removed, the tire is transported to a repair facility where it will be inspected, patched, or reinforced as necessary. Heavy equipment tires are designed for repairs to extend their lifespan, which is cost-effective and efficient for large operations.
While the original tire is being repaired, a replacement tire is installed on the loader. The team positions the replacement tire, aligning it with the wheel hub. Using the pneumatic wrench, they tighten the lug nuts to ensure a secure fit, checking each one for proper torque.
*Step 4: Lowering the Loader and Final Checks*
After securing the replacement tire, the team carefully lowers the Caterpillar 990 back to the ground. The jacks are removed slowly to ensure a smooth, controlled descent.
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