JLG 40E: Understanding the Electric Scissor Lift

[MikePhua]

The JLG 40E is an electric-powered scissor lift that offers a great combination of height, mobility, and ease of use for a variety of tasks. With a reputation for durability, versatility, and efficiency, the JLG 40E is widely used in construction, maintenance, and warehousing. In this article, we’ll dive into the specifics of the JLG 40E, its common issues, and practical troubleshooting tips to ensure that this machine performs optimally in the field.
History and Development of JLG
Founded in 1969 by John L. Grove, JLG Industries, Inc. revolutionized the aerial work platform industry by introducing the first self-propelled boom lift. Over the years, JLG continued to innovate and expand its product offerings, which now include scissor lifts, boom lifts, and telehandlers.
The company’s commitment to designing machines that improve safety, productivity, and efficiency has made it a leader in the aerial equipment sector. The JLG 40E, part of their electric scissor lift line, is a prime example of this commitment. It is designed for indoor use and for applications that require minimal emissions, making it an excellent choice for jobs in warehouses, factories, or other enclosed spaces.
JLG 40E Features and Specifications
The JLG 40E electric scissor lift is designed to provide high-reaching capabilities while maintaining a small footprint for ease of use in tight spaces. Here are some key specifications and features of the JLG 40E:
Key Specifications

• Max Working Height: 46 feet (14 meters)
  
• Platform Height: 40 feet (12.19 meters)
  
• Width: 3 feet 10 inches (1.17 meters)
  
• Length: 8 feet 10 inches (2.69 meters)
  
• Weight: 6,250 lbs (2,840 kg)
  
• Lift Capacity: 500 lbs (227 kg) on the platform
  
• Drive Type: Electric (DC)
  
• Turning Radius: Zero turn radius for enhanced maneuverability
  
• Gradeability: Up to 25% on smooth surfaces
  

Main Features

• Electric Power: Ideal for indoor use, offering zero emissions compared to gas-powered lifts.
  
• Non-Marking Tires: The JLG 40E comes equipped with non-marking tires, making it suitable for use in sensitive environments like clean rooms and showrooms.
  
• Platform Controls: Ergonomically designed controls for ease of use. It includes joystick steering and lift control, making the machine user-friendly.
  
• Rough Terrain Capability: While it is an electric machine, it can be used on uneven terrain, making it versatile in different settings.
  

Common Issues with the JLG 40E and Troubleshooting Tips
Like any piece of machinery, the JLG 40E may experience operational issues from time to time. Below are some common issues users might face and how to troubleshoot them effectively.
1. Lift Not Moving or Slow Movement
A common problem with the JLG 40E is when the lift either doesn’t move or moves slowly. This could be caused by several factors, including power issues or mechanical malfunctions.
Possible Causes:

• Battery Issues: The JLG 40E relies on a 24-volt DC battery for power. If the battery is undercharged or faulty, the lift will have trouble moving or may move slowly.
  
• Motor Issues: A malfunction in the electric motor could cause issues with movement or slow operation.
  
• Electrical Wiring: Loose or damaged wiring could lead to electrical problems that hinder the lift's functionality.
  

Troubleshooting:

• Check the Battery Voltage: Use a multimeter to check the voltage of the battery. A healthy, fully charged battery should read about 24 volts. If the voltage is low, charge or replace the battery as necessary.
  
• Inspect the Motor: If the battery is fully charged and the lift is still moving slowly, check the electric motor for any issues. Test the motor's continuity and ensure the connections are secure.
  
• Examine Electrical Wiring: Look for loose or corroded wiring that may be preventing proper operation. Repair or replace any damaged wires.
  

2. Platform Not Raising
If the platform is not raising, the issue is likely related to the lift's hydraulic or electrical systems.
Possible Causes:

• Hydraulic System Malfunction: The hydraulic pump could be failing, or the system could be low on fluid.
  
• Controller Issues: The platform's control box or joystick may be faulty, preventing proper operation.
  
• Blown Fuses or Circuit Issues: A blown fuse or damaged electrical circuit could be causing the platform not to lift.
  

Troubleshooting:

• Check Hydraulic Fluid Levels: Inspect the hydraulic fluid reservoir and ensure it is filled to the correct level. If the fluid is low, refill it with the recommended type of hydraulic oil.
  
• Inspect the Control Box: Test the control box and joystick to ensure they are functioning properly. If the controls are faulty, they may need to be replaced.
  
• Examine Fuses: Check the machine's fuses and replace any that are blown. Inspect the circuits for signs of wear or damage.
  

3. Battery Not Charging
A common issue with electric lifts is the inability to charge the battery, which could cause operational downtime.
Possible Causes:

• Faulty Charger: If the charger is not functioning properly, the battery will not charge.
  
• Battery Issues: If the battery is old or defective, it may not hold a charge even when the charger is working.
  
• Charging Cable or Connection Problems: Loose or damaged charging cables can prevent proper charging.
  

Troubleshooting:

• Test the Charger: Use a multimeter to test the charger’s output. If it is not providing the correct voltage, replace the charger.
  
• Check the Battery: If the battery is not holding a charge, it may need to be replaced.
  
• Inspect Charging Cable: Examine the charging cable for any signs of damage. Ensure the connection between the cable and the lift is secure.
  

4. Uneven or Jerky Movement
If the JLG 40E experiences jerky or uneven movement, it could be due to issues with the drive system or the lifting mechanism.
Possible Causes:

• Damaged Tires: Worn or damaged tires can cause jerky movements, especially on uneven surfaces.
  
• Worn Drive Motors: If the drive motors are worn or malfunctioning, the machine may experience uneven movement.
  
• Hydraulic System Airlock: Air trapped in the hydraulic system can cause the lift to move unevenly.
  

Troubleshooting:

• Inspect Tires: Examine the tires for wear or damage. If necessary, replace the tires to restore smooth movement.
  
• Check Drive Motors: Inspect the drive motors for signs of wear or malfunction. Replace them if they are not functioning properly.
  
• Bleed the Hydraulic System: If airlock is suspected, bleed the hydraulic system to remove trapped air, allowing for smoother movement.
  

Maintenance Tips for the JLG 40E
To keep your JLG 40E running smoothly and prevent costly repairs, regular maintenance is essential. Below are a few tips to help you maintain the machine:

• Battery Care: Keep the battery charged and check it regularly for any signs of wear or corrosion. Clean the terminals to prevent build-up.
  
• Hydraulic System Checks: Regularly check hydraulic fluid levels and replace the fluid if it appears dirty or contaminated.
  
• Lubrication: Ensure all moving parts, including the lift arms and joints, are adequately lubricated to reduce wear.
  
• Tire Maintenance: Inspect the tires for any punctures or excessive wear, especially when used on rough surfaces.
  

Conclusion
The JLG 40E electric scissor lift is an excellent choice for high-reach tasks in indoor environments, offering power, maneuverability, and eco-friendly operation. Like any piece of heavy equipment, it is important to maintain the machine regularly and address issues promptly to ensure optimal performance. By following troubleshooting steps and preventive maintenance tips, operators can extend the lifespan of the JLG 40E and keep it performing efficiently on the job.