Reinforcing the Cornerstone: Practical Application Case of LiuGong's 71A0016 Drive Axle Main Transmission

I. Project Background: Transmission System Challenges Under Heavy-Load Operations

2024 In the second quarter of the year, a major infrastructure company added new capabilities in its heavy material handling projects. 8  Tai Liu Gong ZL50CN Loader. The project operates in an extremely challenging environment: job sites typically feature rugged dirt roads littered with loose gravel, and the terrain often includes steep slopes with frequent changes in gradient—reaching as high as a maximum incline of 15° ); The equipment needs to operate continuously on a daily basis 10  For more than an hour under heavy load, the weight of materials carried in a single trip often reaches the rated payload. 1.1  Moreover, it places extremely high demands on the load-bearing capacity and stability of the drive system.

Previously, some of the company's older equipment frequently experienced failures such as gear wear and abnormal bearing noises, primarily due to insufficient load-bearing capacity and poor impact resistance in the main transmission components of the drive axles. As a result, each piece of equipment averaged monthly downtime for repairs caused by transmission system issues. 2-3 Next, each maintenance takes a certain amount of time. 4-6 Hours not only lead to high maintenance costs—on average, the monthly repair cost per unit exceeds 1.5  (Ten thousand yuan), also severely slowing down the project's construction progress.

The LiuGong technical team, prior to equipment delivery, combined the project's heavy-load requirements and challenging road conditions to tailor solutions specifically for… 8 All Taiwan loaders are equipped with 71A0016 Drive Axle Main Transmission The main drive features high-strength carburized alloy gears, with a tooth surface hardness reaching HRC 58–62 Meanwhile, the bearing layout design has been optimized, resulting in a rated input torque that is significantly higher than that of conventional main drives. 18% , which can precisely match ZL50CN The loader's power output requirements specifically address the challenge of ensuring reliable transmission system performance under heavy-load conditions.

II. Application Process: Real-World Performance Testing of the Drive Axle Main Transmission

(1) Installation Compatibility: Precise Matching to Original Manufacturer Standards

After the equipment arrived, the LiuGong-authorized service team meticulously followed the original factory's technical specifications to complete the task. 71A0016 Installation and debugging of the drive axle main transmission. This main transmission is associated with ZL50CN The fit of the loader's drive axle housing reaches 99.9% , secured by dedicated locating pins and high-strength bolts, ensuring that the transmission shaft alignment deviation is kept within 0.1mm Within limits, to avoid additional stress concentrations caused by installation deviations. After installation, proceed with 24  Short-hour no-load trial run, with the main drive operating noise remaining stable at 75  Below the decibel level, far exceeding the industry average 85  The decibel standard lays the groundwork for subsequent heavy-load operations.

(II) Operational Performance: Real-World Highlights of Three Core Capabilities

During the为期 4 During months of continuous heavy-load operations, 71A0016 The drive axle main transmission demonstrates stable and reliable performance thanks to its outstanding structural design and material advantages.

1. Superior load-bearing capacity, designed to handle heavy-duty impacts. : Facing a single instance 1.1 Material handling requirements involving twice the rated load—this high-strength alloy gear in the main drive effectively distributes the load, keeping the tooth surface contact stress within a controlled range. 800 MPa Within (the industry's average for similar products is 950MPa ), preventing failures such as gear surface galling and pitting. Compared to an older loader equipped with a conventional main transmission in the project, 71A0016 The gear wear rate of the drive axle's main transmission is reduced. 70% , Running 4  After one month, the gear tooth thickness wear amount is only 0.12mm , far lower than 0.3mm The replacement threshold.
2. Impact resistance and stability, designed for challenging road conditions. In rugged dirt roads and steeply sloped operational environments, frequent equipment starts, stops, and turns can impose instantaneous impact loads on the main drivetrain. 71A0016 The drive axle main transmission, through its optimized bearing preload structure and flexible connection design, can absorb instantaneous impact loads. 30% Above, to prevent issues such as bearing fractures and journal deformation. Actual operating data shows that this main drive performs well even on inclines. 15° When climbing steep slopes under heavy road conditions, the transmission efficiency remains stable at 96% Above, there is no significant power decay, whereas the conventional main drive achieves a transmission efficiency of only 90%-92% , and bearing noises are likely to occur.
3. Low-temperature adaptability ensures all-weather operation. : The project work coincided with winter, and nighttime temperatures dropped as low as - 15℃ 。 71A0016 The drive axle main transmission uses low-temperature anti-wear gear oil, paired with a built-in oil temperature heating device, enabling operation even when the ambient temperature drops below - 10℃ At that time, 30  Raise the oil temperature to within minutes. 20℃ Above, ensure the lubricant maintains fluidity and provides effective lubrication. Even during cold-start conditions, the main transmission operates smoothly without any sticking or seizing, and after startup… 10  It can return to normal operation within minutes, whereas traditional main drives have a success rate of only 80% , and once started, it requires 30  It takes more than a minute to run stably.

III. Application Outcomes: Dual Enhancement of Reliability and Cost-effectiveness

As of 2024 At the end of the year, 8  Equipped with a Taiwan 71A0016 The loader equipped with the drive axle's main transmission has accumulated over 1.5  Achieving significant breakthroughs in transmission system protection and project cost control—over 10,000 hours!

• Maintenance costs significantly reduced : The frequency of drive axle main transmission-related failures (such as gear wear and bearing damage) has been decreasing monthly 2.5 Decreased to 0.1  Next, the average monthly maintenance cost for the transmission system per unit decreased from 1.5  Ten thousand yuan drops to 1800  Yuan, with a decline of up to 88% ; Meanwhile, with the reduction in main-drive failures, the frequency of failures in other components of the entire drive system—such as half shafts and differentials—has also declined. 60% , further reducing overall maintenance expenses.
• Equipment availability has significantly improved. : Unplanned downtime caused by transmission system issues has decreased from monthly 12 Hours reduced to 0.5  Hours, the overall equipment availability remains stable at 99% Above, an improvement compared to the project's initial stage 5  Percentage points effectively ensured the project progressed on schedule, preventing delays and losses caused by equipment downtime.
• Energy Consumption and Lifespan Optimization ： 71A0016 High transmission efficiency of the drive axle's main gear (averaging up to 95% (Above), enabling the loader to reduce fuel consumption during heavy-load operations. 2.5% , the hourly fuel consumption of a single device decreases from 17.5L Drop to 17.1L , annual operation 2200  Hourly calculations show that a single unit saves over in annual fuel costs. 2000  Yuan; meanwhile, the main transmission is designed for a service life of 1.2  Ten thousand hours, compared to traditional main drives 8000  Hourly improvement 50% , which can reduce the number of main drive replacements throughout the equipment's entire lifecycle, thereby lowering equipment upgrade costs.

During the annual project review, the head of equipment management stated: “ Liugong 71A0016 The reliability of the drive axle's main transmission has far exceeded expectations, consistently delivering stable performance even under heavy loads, in challenging road conditions, and in low-temperature environments—providing a solid foundation for continuous equipment operation. It is an indispensable core component for heavy-duty loaders. ”