Case 621F 721F Tier 4 Wheel Loader OM: A Comprehensive Overview
The Case 621F and 721F Tier 4 wheel loaders are renowned for their robustness, efficiency, and versatility in the construction and mining industries. In this detailed guide, we will delve into the specifications, features, and performance of these machines, providing you with a comprehensive understanding of what makes them stand out in the market.
Engine and Performance
The Case 621F and 721F wheel loaders are powered by Tier 4 Final compliant engines, ensuring compliance with the latest emissions standards. The 621F is equipped with a 4.5-liter engine, while the 721F boasts a 6.7-liter engine. Both engines are designed to deliver exceptional power and efficiency, with the 721F offering a higher horsepower rating of 175 compared to the 621F’s 155 horsepower.
| Model | Engine | Engine Displacement | Power Output |
|---|---|---|---|
| Case 621F | 4.5-liter | 4.5 liters | 155 horsepower |
| Case 721F | 6.7-liter | 6.7 liters | 175 horsepower |
These engines are paired with a 6-speed Powershift transmission, which provides smooth and efficient power delivery. The transmission features a lock-up torque converter for improved fuel efficiency and reduced heat generation. Both loaders offer a maximum travel speed of 23.6 mph (38 km/h), ensuring quick and efficient movement across job sites.
Load Capacity and Lift Height
The Case 621F and 721F wheel loaders are designed to handle a wide range of material handling tasks. The 621F has a maximum lift capacity of 7,500 pounds (3,402 kg) at the bucket’s edge, while the 721F can handle up to 9,000 pounds (4,082 kg). Both loaders offer a lift height of 10 feet (3.05 meters), allowing for easy loading and placement of materials.
The loaders are available with a variety of bucket options, including general-purpose, rock, and snow buckets, to suit different applications. The buckets are designed to provide maximum breakout force and durability, ensuring efficient material handling.
Hydraulic System and Controls
The Case 621F and 721F wheel loaders feature a powerful hydraulic system, providing quick and precise control of the loader’s functions. The loaders are equipped with a closed-center, load-sensing hydraulic system, which ensures optimal performance and fuel efficiency. The system provides a flow rate of 37 gallons per minute (140 liters per minute) for the main pump and 18 gallons per minute (68 liters per minute) for the auxiliary pump.
The loaders are equipped with a multi-function control handle, allowing operators to easily switch between various functions, such as bucket, fork, and dozer. The controls are designed for comfort and ease of use, ensuring that operators can work efficiently for extended periods.
Comfort and Safety Features
The Case 621F and 721F wheel loaders are designed with operator comfort and safety in mind. The loaders feature a spacious, well-lit cab with a high-back, air-suspension seat. The cab is equipped with a full set of gauges and controls, providing operators with easy access to all necessary information.
Both loaders are equipped with a standard ROPS (Roll Over Protective Structure) and FOPS (Falling Object Protective Structure) to protect operators in the event of a rollover or falling object. The loaders also feature a standard seat belt and a backup alarm for added safety.
Serviceability and Maintenance
The Case 621F and 721F wheel loaders are designed for easy maintenance and service. The loaders feature a wide opening hood, providing easy access to the engine and other components. The engine is equipped with a day tank, which allows for quick and easy refueling.
The loaders are also equipped with a centralized grease system, which simplifies the lubrication process. The system ensures that all critical components are properly lubricated, extending the life of the machine and reducing downtime
