Volvo L90G Wheel Loader: Performance, Challenges, and Maintenance Insights

[MikePhua]

The Volvo L90G is a part of Volvo's G-Series of wheel loaders, widely known for their excellent performance, versatility, and durability. With its compact size, strong lifting capabilities, and powerful engine, the L90G has found its place in various industries, including construction, mining, and agriculture. However, like any heavy machinery, operators must be vigilant about maintenance and troubleshooting to ensure optimal performance. In this article, we’ll dive into the essential features of the L90G, common challenges users face, and some maintenance insights based on user experiences.
Overview of the Volvo L90G
The Volvo L90G is a mid-sized wheel loader equipped with a powerful 6-cylinder engine that delivers impressive lifting capacity and operating efficiency. The loader features an advanced hydrostatic transmission, allowing for smooth operation and the ability to handle a variety of tasks, from material handling to earth-moving.
With an operating weight of around 15,000 kg (33,000 lbs), the L90G is capable of lifting heavy loads, making it suitable for a wide range of tasks, including roadwork, excavation, and site clearing. Its articulating frame offers exceptional maneuverability, and the hydraulics system provides smooth lifting and digging motions. Additionally, the spacious and comfortable cabin makes it a popular choice for long shifts.
Despite its robust features, the L90G has some common issues and challenges that operators need to keep in mind for maintenance and troubleshooting.
Common Issues Faced by Operators of the Volvo L90G
1. Hydraulic System Performance
The hydraulic system is one of the most crucial components of any wheel loader. In the case of the Volvo L90G, hydraulic issues are frequently reported by users. Slow response times, inconsistent lifting, or sudden drops in pressure can affect the loader’s efficiency and performance.

• Possible Causes:
  • Hydraulic Fluid Contamination: Contaminated hydraulic fluid can lead to poor system performance and, in some cases, total failure. This is often caused by dirt and debris entering the hydraulic lines, or the fluid breaking down over time.
    
  • Worn Seals or Hydraulic Pump Failure: Worn seals or a malfunctioning hydraulic pump can result in pressure loss and affect the lifting capability.
    
  • Overheating: If the hydraulic fluid overheats, it can lead to degraded performance, system failure, or even severe damage.
    
• Solutions:
  • Regularly replace hydraulic filters and clean the hydraulic system.
    
  • Monitor fluid levels and replace them periodically.
    
  • Keep the hydraulic components clean to avoid contamination.
    

2. Transmission and Power Issues
Another issue reported by operators is transmission or power system problems. This can result in difficulty moving, shifting gears, or uneven power delivery, causing performance to lag, especially under load.

• Possible Causes:
  • Low or Contaminated Transmission Fluid: If the fluid level is too low or contaminated, it can prevent proper gear engagement and smooth operation.
    
  • Faulty Torque Converter: A faulty torque converter may affect the transmission system, especially when starting or shifting gears.
    
  • Worn or Broken Drive Belts: Over time, drive belts may wear out, leading to power loss or difficulty shifting.
    
• Solutions:
  • Keep an eye on transmission fluid levels and cleanliness, replacing it when necessary.
    
  • Inspect belts regularly for wear and replace them as needed.
    
  • Have the torque converter checked to ensure proper functioning.
    

One operator reported that a slow-moving transmission issue on a Volvo L90G was traced to low fluid levels and a dirty filter. Once these were replaced, the loader's performance was restored, highlighting the importance of regular maintenance checks.
3. Electrical System Issues
Electrical problems are another common issue that can impact the performance of the L90G, especially given its reliance on modern technology and electrical components for optimal operation. Symptoms can include malfunctioning lights, erratic behavior of dashboard indicators, or the inability to start.

• Possible Causes:
  • Battery Problems: A weak or discharged battery can lead to starting issues, especially in cold weather.
    
  • Loose or Corroded Wiring: Over time, electrical connections may become loose or corroded, leading to intermittent failures or complete shutdowns.
    
  • Faulty Alternator: A faulty alternator may prevent the battery from charging properly, causing the loader to lose power.
    
• Solutions:
  • Regularly check the battery condition and charge levels.
    
  • Inspect wiring and clean or replace any corroded connections.
    
  • Test and replace the alternator if necessary.
    

Several users have shared stories of electrical failures in their Volvo L90G machines, often linked to the alternator and faulty wiring. Routine checks and replacing aging components helped restore reliable performance.
4. Cooling System Failures
A critical issue to watch for is overheating, especially in a machine like the L90G, which is often used in demanding environments. Overheating can cause engine damage, hydraulic system failure, and other long-term issues.

• Possible Causes:
  • Low Coolant Levels: A common cause of engine overheating is a low coolant level, which can prevent the engine from cooling effectively.
    
  • Clogged Radiators: Dirt, debris, and dust can accumulate in the radiator, reducing airflow and causing the engine to overheat.
    
  • Faulty Thermostat: A malfunctioning thermostat may cause the cooling system to operate inefficiently, leading to overheating.
    
• Solutions:
  • Ensure coolant levels are topped up regularly.
    
  • Clean the radiator to remove dirt and debris, ensuring optimal airflow.
    
  • Test and replace the thermostat if it is not functioning correctly.
    

An operator recounted how they experienced overheating on their L90G after a day of heavy use. A quick inspection revealed a clogged radiator, which was cleaned, allowing the machine to cool properly and resume work.
Maintenance Tips for the Volvo L90G
To avoid the common issues mentioned above and keep the Volvo L90G in good working condition, operators should focus on a few key maintenance practices:

1. Daily Inspections: Perform a quick daily inspection before use. Check fluid levels, tire pressures, and the condition of hydraulic hoses, belts, and wiring.
   
2. Regular Lubrication: Lubricate the machine’s moving parts regularly to reduce wear and tear, especially the lift arms and bucket pivots.
   
3. Fluid Replacement: Replace engine oil, hydraulic fluid, and transmission fluid at the manufacturer-recommended intervals to maintain optimal performance.
   
4. Monitor Cooling System: Regularly inspect the radiator and cooling system to prevent overheating. Clean any debris from the system before it becomes an issue.
   
5. Electrical System Maintenance: Periodically check the electrical system, ensuring that all connections are tight and free from corrosion.
   

Conclusion
The Volvo L90G is a dependable and efficient wheel loader that delivers impressive performance across a variety of tasks. However, like any heavy equipment, it requires regular maintenance and occasional troubleshooting to keep it running at its best. By addressing common issues such as hydraulic performance, transmission problems, electrical malfunctions, and cooling system failures, operators can extend the life of their L90G and avoid costly downtime. Regular maintenance, timely repairs, and proper usage will ensure that the Volvo L90G continues to serve its purpose for years to come.