Komatsu WB140-2 Backhoe Loader

[MikePhua]

Introduction
The Komatsu WB140-2 backhoe loader, a product of Komatsu Ltd., is a versatile machine designed for various construction and excavation tasks. Manufactured between 1999 and 2006, the WB140-2 has been widely used in urban construction, road maintenance, and agricultural applications. Its robust design and reliable performance have made it a popular choice among operators worldwide.

Engine and Performance
The WB140-2 is equipped with the Komatsu S4D106-1FH engine, a 4-cylinder turbocharged diesel engine. This engine delivers a net power output of 86 horsepower (64 kW) at 2,200 rpm, providing ample power for demanding tasks. The engine's displacement is 4.412 liters, with a bore and stroke of 106 mm and 125 mm, respectively. The maximum torque is 330 Nm at 1,400 rpm, ensuring efficient operation under load. The engine is designed for durability and fuel efficiency, making it suitable for long hours of operation.

Hydraulic System and Loader Specifications
The WB140-2 features a closed-center load-sensing hydraulic system, providing efficient power distribution and responsive control. The hydraulic pump delivers a flow rate of 165 liters per minute, with a relief valve pressure of 3,200 psi (221 bar). The front loader is equipped with a standard bucket with a capacity of 0.95 cubic meters (1.25 cubic yards) and a bucket width of 2.355 meters (7 feet 9 inches). The loader's breakout force is 12,790 lbs (5,801 kg), and the lifting capacity at maximum height is 8,270 lbs (3,751 kg). The loader's design allows for better tensile strength distribution and parallel movements when lifting and lowering the bucket.

Backhoe Specifications
The backhoe is designed for deep excavation tasks, with a maximum digging depth of 4.875 meters (16 feet). The backhoe's dipper digging force is 8,825 lbs (3,925 kg), and the bucket breakout force is 13,515 lbs (6,005 kg). The backhoe's design features a rounded profile and a reinforced structure built with cast ends, allowing 180° rotation while maintaining high rotation torque. The boom design reduces the number of greasing points, enhancing maintenance efficiency.

Dimensions and Transport
The WB140-2 has a transport length of 6.125 meters (20 feet 2 inches), a width of 2.355 meters (7 feet 9 inches), and a height of 3.5 meters (11 feet 6 inches). The machine's operating weight is approximately 7,525 kg (16,600 lbs), making it suitable for transportation without the need for special permits in many regions. The turning radius at the outer edge of the front tire is 4.3 meters (14 feet 1 inch) without brakes and 3.4 meters (11 feet 2 inches) with brakes, allowing for maneuverability in confined spaces.

Transmission and Drivetrain
The WB140-2 is equipped with a synchronized mechanical 4-speed gearbox and a power shuttle for smooth directional changes. The transmission system allows for efficient power transfer and control in various operating conditions. The machine features an electro-hydraulic system for switching between 2WD and 4WD, providing enhanced traction when needed. The front axle is equipped with heavy-duty planetary reduction gears in the wheel hubs, and the rear axle features a differential lock controlled by an electro-hydraulic system.

Operator Comfort and Features
The WB140-2 is designed with operator comfort in mind. The cabin is spacious and features adjustable joysticks, providing comfort during extended work hours. The machine's design emphasizes ease of use, with intuitive controls and good visibility, enhancing operator productivity and safety. The cabin is equipped with a heating and ventilation system, ensuring a comfortable working environment in various weather conditions.

Maintenance and Durability
Regular maintenance is crucial to ensure the longevity of the WB140-2. Operators should adhere to the manufacturer's recommended service intervals for engine oil changes, hydraulic fluid checks, and filter replacements. The machine's durable construction and quality components contribute to its reliability over time. The design of the front loader allows for better tensile strength distribution and parallel movements when lifting and lowering the bucket, reducing wear and tear on components.

Conclusion
The Komatsu WB140-2 backhoe loader stands out for its powerful performance, versatile capabilities, and operator-friendly design. Its specifications make it a valuable asset for various construction projects, offering efficiency and reliability to meet the demands of the industry. With proper maintenance and care, the WB140-2 can provide years of dependable service, making it a wise investment for contractors and operators alike.