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The 1981 JLG 40G is a part of the legacy of JLG Industries, a company well-known for designing and manufacturing a wide range of aerial lifts and boom lifts. The JLG 40G, introduced in the early 1980s, remains a notable model for those who need a reliable, high-reaching aerial platform for construction, maintenance, and various industrial applications. Despite its age, this machine continues to be in use across various sectors, proving its durability and effectiveness. In this article, we will explore the key features of the JLG 40G, common issues faced by owners, and maintenance tips to keep this iconic lift running efficiently.
Introduction to the JLG 40G
The JLG 40G is a boom lift (also known as a cherry picker) that is designed to lift workers and equipment to high places. The 40G offers significant height capabilities and is often used in industries such as construction, electrical work, and maintenance. This model is equipped with a hydraulic boom that extends vertically and horizontally, allowing it to reach various heights and positions with ease.
While the JLG 40G is a durable machine, like any older equipment, it is subject to wear and tear over the years. Operators and owners of this model may face some common issues that require attention to maintain the lift’s reliability and safety.
To keep a 1981 JLG 40G running smoothly and avoid costly repairs, regular maintenance is essential. Here are some important maintenance tasks and tips to ensure the lift’s longevity and optimal performance:
A construction company that specializes in high-rise maintenance and repair found an old 1981 JLG 40G that had been sitting unused for several years. Initially, they were unsure if the lift could be restored to full working condition. However, after a thorough inspection and maintenance, the following steps helped bring the lift back to life:
Conclusion
The 1981 JLG 40G is a classic aerial lift that has proven its reliability and effectiveness over the years. While older machines may require more frequent maintenance, their durability and high performance make them a valuable asset for many industries. Regular care and attention to key systems, such as the hydraulic and engine components, can ensure the longevity of the JLG 40G and keep it running smoothly for many more years. With proper maintenance, this lift can continue to serve as a reliable tool for contractors and maintenance crews, proving that age doesn’t necessarily equate to obsolescence in the world of heavy equipment.
Introduction to the JLG 40G
The JLG 40G is a boom lift (also known as a cherry picker) that is designed to lift workers and equipment to high places. The 40G offers significant height capabilities and is often used in industries such as construction, electrical work, and maintenance. This model is equipped with a hydraulic boom that extends vertically and horizontally, allowing it to reach various heights and positions with ease.
- Model Overview: The JLG 40G has a maximum platform height of 40 feet (12.2 meters), which is relatively impressive for its class. The platform itself is designed to hold a few workers and equipment, with a capacity of around 500 pounds (227 kg).
- Key Features:
- Platform Height: 40 feet (12.2 meters).
- Horizontal Reach: Typically, the horizontal reach is around 20 feet (6 meters), allowing it to access positions that may not be directly under the machine.
- Hydraulic Power: The JLG 40G uses hydraulic cylinders for the boom movement, providing smooth and precise control over the platform’s positioning.
- Drive System: The machine is typically powered by either a gasoline or diesel engine, depending on the specific configuration. The engine provides the power needed for both the boom lift mechanism and the driving functionality.
- Platform Height: 40 feet (12.2 meters).
While the JLG 40G is a durable machine, like any older equipment, it is subject to wear and tear over the years. Operators and owners of this model may face some common issues that require attention to maintain the lift’s reliability and safety.
- Hydraulic System Leaks: The hydraulic system is responsible for controlling the boom and lifting the platform. Over time, the seals in the system can degrade, leading to leaks in the hydraulic fluid. This can reduce the effectiveness of the boom lift and may even cause the system to fail if not addressed.
- Engine Performance: Given the age of the 1981 model, the engine may require more frequent maintenance. Issues such as spark plug failure, fuel filter clogging, or poor fuel quality can affect engine performance, leading to difficulties in starting or reduced power.
- Boom Extension and Retraction Issues: The boom mechanism can sometimes become slow or unresponsive due to internal hydraulic issues or mechanical wear. Regular inspection of the boom’s hydraulic lines and mechanical parts is necessary to ensure smooth operation.
- Electrical Failures: Electrical problems can arise in older machines due to corroded wiring, blown fuses, or faulty relays. Electrical components control various systems on the lift, including the drive motor, lights, and control panels.
- Tire and Drive Train Wear: If the machine is frequently driven on rough terrain, the tires and drive train may wear out more quickly. Regularly checking the tires for uneven wear and ensuring that the drive train is lubricated and in good working condition is critical for preventing further damage.
To keep a 1981 JLG 40G running smoothly and avoid costly repairs, regular maintenance is essential. Here are some important maintenance tasks and tips to ensure the lift’s longevity and optimal performance:
- Regular Hydraulic Fluid and Filter Checks: The hydraulic system is the heart of the JLG 40G’s operation. To keep it functioning properly, check the hydraulic fluid levels regularly, and ensure that the fluid is clean and free of contaminants. Replace filters every 200-300 hours of operation or as recommended by the manufacturer.
- Engine Maintenance:
- Change Oil and Filters: Just like any internal combustion engine, the JLG 40G’s engine requires regular oil changes to ensure proper lubrication and prevent excessive wear. Follow the manufacturer’s recommendations for oil type and change intervals.
- Air and Fuel Filters: Clean or replace the air and fuel filters to ensure the engine is running smoothly. Clogged filters can lead to decreased performance and engine failure.
- Change Oil and Filters: Just like any internal combustion engine, the JLG 40G’s engine requires regular oil changes to ensure proper lubrication and prevent excessive wear. Follow the manufacturer’s recommendations for oil type and change intervals.
- Inspect the Boom Mechanism:
- Check for Wear and Tear: Inspect the boom and its components for signs of wear, particularly the pivot points, hydraulic hoses, and seals. If there is any visible damage, replace the parts immediately to avoid further issues.
- Grease Moving Parts: Lubricate the moving parts of the boom with high-quality grease to reduce friction and ensure smooth extension and retraction.
- Check for Wear and Tear: Inspect the boom and its components for signs of wear, particularly the pivot points, hydraulic hoses, and seals. If there is any visible damage, replace the parts immediately to avoid further issues.
- Electrical System Checks:
- Inspect Wiring and Connectors: Over time, wires and connectors can corrode or loosen, leading to electrical malfunctions. Inspect the wiring regularly, particularly in high-moisture areas, and clean or replace any corroded connectors.
- Test Control Systems: The control systems on the JLG 40G, including the platform controls and drive system, should be tested periodically to ensure they are functioning properly. Check the fuses and relays for any signs of failure.
- Inspect Wiring and Connectors: Over time, wires and connectors can corrode or loosen, leading to electrical malfunctions. Inspect the wiring regularly, particularly in high-moisture areas, and clean or replace any corroded connectors.
- Tire and Drive Train Maintenance:
- Check Tires for Wear: Tires can become worn or punctured over time, especially if the lift is used in rugged conditions. Regularly inspect the tires and replace them if necessary. Maintaining proper tire pressure is also important for safe operation.
- Lubricate the Drive Train: Keep the drive train lubricated to prevent unnecessary wear. Check for any loose bolts or damaged components in the drivetrain, and tighten or replace them as needed.
- Check Tires for Wear: Tires can become worn or punctured over time, especially if the lift is used in rugged conditions. Regularly inspect the tires and replace them if necessary. Maintaining proper tire pressure is also important for safe operation.
A construction company that specializes in high-rise maintenance and repair found an old 1981 JLG 40G that had been sitting unused for several years. Initially, they were unsure if the lift could be restored to full working condition. However, after a thorough inspection and maintenance, the following steps helped bring the lift back to life:
- Hydraulic System Overhaul: The team replaced the worn seals and hoses, flushed the hydraulic fluid, and replaced the filters. The lift's boom and platform movement became smoother and more responsive.
- Engine Tune-Up: The engine was given a thorough tune-up, including changing the oil, cleaning the fuel system, and replacing the spark plugs. The lift started up reliably, even after long periods of inactivity.
- Drive and Electrical Systems: The electrical connections were cleaned and inspected, and new wiring was installed where necessary. After ensuring that the drive system was fully lubricated, the lift was ready to move again.
Conclusion
The 1981 JLG 40G is a classic aerial lift that has proven its reliability and effectiveness over the years. While older machines may require more frequent maintenance, their durability and high performance make them a valuable asset for many industries. Regular care and attention to key systems, such as the hydraulic and engine components, can ensure the longevity of the JLG 40G and keep it running smoothly for many more years. With proper maintenance, this lift can continue to serve as a reliable tool for contractors and maintenance crews, proving that age doesn’t necessarily equate to obsolescence in the world of heavy equipment.
