The Cat 922 is a versatile and reliable piece of machinery, but like any piece of equipment, it has its quirks and potential problems. This guide offers insights into the Cat 922’s capabilities, common issues, and maintenance requirements, drawing from firsthand experience and expert knowledge. Whether you’re considering purchasing a Cat 922 or already own one, this information will help you make informed decisions and keep your machine running smoothly.
Understanding the Cat 922’s Capabilities and Limitations
The Cat 922’s lifting capacity is largely determined by its bucket size. While specific specifications may vary, a standard bucket can generally handle anything that fits within its confines. However, its lifting height is limited. Imagine loading a flatbed truck with 2-foot sides – that’s the ideal scenario for the 922. It can lift higher, but you’ll likely end up dumping material over the high side rather than neatly piling it in the center. The self-leveling bucket can also lead to unexpected tilting at maximum height. While you can’t point the bucket’s cutting edge directly at the sky and maintain that position while lifting, this feature prevents spilling material over the back.
Common Mechanical Issues and Solutions
One common issue with the Cat 922 is a failing CV joint in the rear axle steering knuckles. Driveline U-joints are generally less problematic; replacing them is a straightforward process of unbolting the old joint and installing a new one. However, replacing a CV joint involves removing the wheel, planetary cover, sun gear, and steering knuckle before pulling out the axle and replacing the joint. This same procedure applies to replacing oil seals in the rear. Addressing leaks in the rear axle is crucial, as oil can drip out of the CV joint ball if the axle seals are faulty.
Leaking wheel seals, both front and rear, can contaminate the brakes, which are generally not very strong to begin with. The Cat 922 has two different brake setups. The earlier system uses a complex air-assisted hydraulic valve allowing minimal manual braking at low air pressure. The later system uses a simpler air brake pedal valve actuating a single air canister that powers a master cylinder. This latter setup is generally preferred for its simplicity and ease of repair.
Steering and Drivetrain Considerations
The steering gearbox can be a significant expense if the specialized follower within the worm gear fails. This failure is more common in machines without cabs, where rainwater can enter the steering shaft and damage the gearbox. Regular maintenance of the steering gearbox, including keeping it well-lubricated, is essential.
The Cat 922 features a two-speed power shift transmission with a reverser and torque converter, along with an unsynchronized high/low range shift. It’s not exceptionally powerful when pushing; 4WD/LO range is typically necessary for most tasks. High range/2WD is best suited for travel, but be cautious at high speeds, as even minor bumps can cause instability.
Making an Informed Purchasing Decision
If you’re considering buying a Cat 922, driving it and comparing it to more modern machines is crucial. Remember, these are older machines with basic technology. Understanding their limitations and maintenance needs is key to a successful ownership experience.
Conclusion
The Cat 922, while an older machine, can be a valuable asset when its capabilities and limitations are understood. Regular maintenance, particularly of the CV joints, axle seals, and steering gearbox, is vital for long-term reliability. By understanding the nuances of this machine, owners can maximize its productivity and minimize downtime.
