HITACHI LR140-721B Alternator

( Brand: Hitachi ), ( Manufacturer Part Number: LR140-721B ), ( Part Type: Alternator )

Review HITACHI Alternator

The Hitachi LR140-721B alternator is a heavy-duty component designed for use in construction equipment, specifically for excavators in the 140-tonne class. This alternator is engineered to deliver reliable and efficient power to the electrical systems of these large machines.

The alternator boasts a power output of 720 kVA at 400 volts, making it a powerful solution for meeting the energy demands of large construction projects. Its robust design includes a cast iron housing that is both durable and effective at dissipating heat. The alternator is also equipped with a liquid cooling system, which ensures optimal performance even during prolonged periods of heavy usage.

The Hitachi LR140-721B alternator features a brushless excitation system, which minimizes maintenance requirements and reduces the risk of downtime due to brush wear. The alternator also includes a voltage regulator that ensures stable voltage output, even in varying load conditions.

The alternator's rotor is constructed of a high-strength material, allowing it to handle the high power loads required by large construction equipment. The alternator's stator windings are made of high-quality copper wire, which provides excellent electrical conductivity and helps to ensure efficient power transfer.

The Hitachi LR140-721B alternator is designed for easy installation and maintenance. It comes with a mounting kit that allows for quick and secure attachment to the excavator frame. The alternator also includes easily accessible service points, making routine maintenance tasks simple and straightforward.

Overall, the Hitachi LR140-721B alternator is a high-performance, heavy-duty component that is ideally suited for use in large construction equipment. Its robust design, efficient cooling system, and reliable power output make it an essential component for any heavy construction project.

The Hitachi LR140-721B alternator is a popular choice for construction and heavy equipment applications due to its robust design and reliable performance. Here are some pros and cons to consider before making a purchase:

1. High Power Output: This alternator delivers a maximum output of 140 kVA at 1200 RPM, making it suitable for powering large construction equipment or industrial applications.

2. Durability: Hitachi is known for producing high-quality equipment that can withstand the rigors of heavy use. The LR140-721B alternator is no exception, with a heavy-duty cast iron housing and robust components that can handle the demands of construction sites.

3. Easy Maintenance: The alternator comes with easily accessible components, making routine maintenance tasks simple and efficient.

4. Efficient Design: The alternator features a brushless design, which reduces wear and tear on the brushes and improves overall efficiency.

5. Versatile: This alternator can be used in a variety of applications, from construction equipment to generator sets, making it a versatile investment.

1. High Cost: The Hitachi LR140-721B alternator is a premium product, and its high cost may be a barrier for some buyers.

2. Complex Installation: Installing this alternator may require specialized knowledge and tools, which could add to the overall cost and complexity of the project.

3. Heavy Weight: The alternator's robust design and high power output come at a cost - weight. It weighs over 1,100 pounds, making transportation and installation more challenging.

4. Limited Availability: Due to its high cost and specialized applications, the Hitachi LR140-721B alternator may not be readily available from all suppliers, making it more difficult to source.

The Hitachi LR140-721B alternator offers high power output, durability, easy maintenance, and efficiency, making it an excellent investment for heavy construction and industrial applications. However, its high cost, complex installation, heavy weight, and limited availability may be barriers for some buyers.

If you require a high-powered alternator for heavy construction or industrial applications and have the budget and resources to handle the installation and transportation, the Hitachi LR140-721B alternator is an excellent choice. Its robust design, reliable performance, and easy maintenance make it a worthwhile investment. However, if you have limited resources or are looking for a more affordable option, you may want to consider alternative brands or models with similar specifications.

Details:

Manufactured following strict OE standards to work like the original component. Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle. Engineered using the latest technology to ensure product lasts longer in service. Made of high-quality components for durability, reliability, and performance.

Designed specifically for trucks, trailers, and buses. Hitachi LR140-721B Alternator 12 V, 40 Amp, Clockwise Rotation, Lug Mount, Internal Fan: Part Number: Manufacturer: HITACHI.

part #: lr140721b prices

• $107.00-$129.79

specifications altnagen:

• brand: Hitachi
• mpn: Lr140-721b
• part type: Alternator

returns altnagen:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

payments altnagen:

• credit card: Visa
• other
• wallet: Apple-pay

general altnagen:

• Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > Alternators Generators
• condition: New

seller altnagen:

• rating: 99.1%
• city: Los Angeles, California
• # reviews: 64179

offer altnagen:

• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 2
• started: February 3, 2026
• availability: In Stock

shipping altnagen:

• cost: $0.00
• type: Fixed
• class: Standard
• service: Standard
• transit: 3-7 Days

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