Troubleshooting Skyjack Lift Issues: A Comprehensive Guide

[MikePhua]

Skyjack lifts are widely used in construction, maintenance, and industrial sectors for accessing heights safely and efficiently. However, like all machinery, they can experience issues that hinder their performance. This article covers a detailed look at common problems that can occur with Skyjack lifts and provides troubleshooting tips to help resolve these issues effectively.
Overview of Skyjack Lifts
Skyjack is a popular brand known for its high-quality aerial work platforms (AWPs), including scissor lifts, boom lifts, and vertical mast lifts. These lifts are commonly used in construction sites, warehouses, and other industrial settings to provide workers with a safe and stable platform for reaching elevated areas.
Skyjack lifts are known for their durability, ease of use, and powerful lifting capabilities. However, like any mechanical equipment, they require regular maintenance and occasional troubleshooting.
Common Issues with Skyjack Lifts
Skyjack lifts, while reliable, can sometimes develop faults. These issues range from simple electrical failures to mechanical problems that require significant repairs. Some common problems include:

1. Lift Not Moving or Not Raising Properly
   
2. Battery Issues
   
3. Hydraulic Problems
   
4. Electrical Malfunctions
   
5. Faulty Controls or Wiring
   

Let’s break down each of these issues and their possible solutions.
Lift Not Moving or Not Raising Properly
A common issue with Skyjack lifts is when the lift mechanism fails to raise the platform, or the platform raises only partially. This could be caused by various factors:
Potential Causes:

• Low Battery Charge: If the lift is running on a low battery, it may not have enough power to raise the platform.
  
• Hydraulic System Failure: The hydraulic system, which powers the lift's movement, could be malfunctioning due to low fluid levels, leaks, or worn-out seals.
  
• Faulty Pump or Motor: If the pump or motor that drives the hydraulic system fails, the lift won’t move.
  
• Control Valve Issue: A malfunctioning control valve could cause the lift to fail to raise properly.
  

Solutions:

• Charge the Battery: Ensure the lift’s battery is fully charged, as a low battery is one of the most common reasons for the lift failing to rise. Check the battery terminals for corrosion and clean them if necessary.
  
• Check Hydraulic Fluid Levels: Inspect the hydraulic fluid levels and ensure that there are no leaks in the system. If the fluid is low, top it up with the recommended type of hydraulic oil.
  
• Inspect the Pump and Motor: If the battery and hydraulic fluid levels are sufficient, but the lift still won’t move, check the pump and motor for any signs of failure or damage. These components may require replacement if they are worn out.
  
• Inspect the Control Valve: Check the control valve for blockages or damage. If faulty, it may need to be repaired or replaced.
  

Battery Issues
Battery problems are common in electric-powered Skyjack lifts. These problems may cause the lift to not start or operate intermittently.
Potential Causes:

• Corroded Battery Terminals: Corrosion on the battery terminals can interfere with the electrical connection, leading to power failure.
  
• Dead or Weak Battery: Batteries naturally degrade over time and may need to be replaced after a few years of use.
  
• Charging Problems: If the charging system is malfunctioning, the battery may not receive the proper charge, even if it is connected to a power source.
  

Solutions:

• Clean Battery Terminals: If corrosion is present, clean the battery terminals with a mixture of baking soda and water. Scrub the terminals with a wire brush and reattach the cables tightly.
  
• Replace the Battery: If the battery is old or damaged, replace it with a new one. Ensure the new battery matches the specifications for your specific Skyjack model.
  
• Check the Charging System: Ensure the charging system is working properly. Test the voltage output from the charger and inspect the wiring for any damage.
  

Hydraulic Problems
Hydraulic system failures are a common cause of lift malfunction. Since the hydraulic system controls the movement of the platform, any issues in this system can prevent the lift from functioning.
Potential Causes:

• Hydraulic Leaks: Leaking hydraulic fluid is one of the most common causes of poor performance. Leaks can occur in the hoses, fittings, or hydraulic cylinders.
  
• Dirty or Contaminated Fluid: If the hydraulic fluid is dirty or contaminated with debris, it can clog filters and reduce the efficiency of the system.
  
• Worn-out Seals: Seals and O-rings within the hydraulic system can wear out over time, causing leaks and poor performance.
  

Solutions:

• Check for Leaks: Inspect the hydraulic hoses and fittings for leaks. Replace any worn or damaged hoses. Tighten loose fittings.
  
• Replace Hydraulic Fluid: If the hydraulic fluid is contaminated, replace it with fresh fluid. Be sure to use the correct type of fluid recommended by the manufacturer.
  
• Inspect Seals: Check the hydraulic seals for wear and replace any that are damaged.
  

Electrical Malfunctions
Electrical malfunctions are common in modern Skyjack lifts, especially in the control systems that manage lift movement, alarms, and safety functions.
Potential Causes:

• Blown Fuses: A blown fuse can prevent the lift from starting or cause the lift to operate erratically.
  
• Faulty Wiring or Connections: Loose or corroded wiring connections can cause power interruptions or intermittent faults.
  
• Control Module Failure: The control module that regulates electrical functions could be malfunctioning, leading to problems with the lift’s operation.
  

Solutions:

• Inspect Fuses and Replace: Check the lift’s fuse box for any blown fuses and replace them with fuses of the correct rating.
  
• Check Wiring and Connections: Inspect all electrical connections for loose or corroded wires. Tighten or clean connections as needed.
  
• Test the Control Module: If the electrical system seems to be functioning erratically, consider testing or replacing the control module.
  

Faulty Controls or Wiring
Another potential issue could arise with the lift’s controls, which may become faulty due to wear, poor maintenance, or electrical issues. This can lead to problems such as the lift not responding to inputs or operating unpredictably.
Potential Causes:

• Worn or Dirty Joystick Controls: The joystick controls that manage the lift’s movements may become dirty or worn over time, causing them to malfunction.
  
• Corroded Electrical Contacts: Electrical contacts within the control panel may become corroded, preventing proper communication between components.
  
• Loose Connections in Control Circuit: If there are loose connections or wiring issues in the control circuit, it can cause erratic behavior.
  

Solutions:

• Clean the Joystick Controls: Disassemble the joystick control and clean any dirt or debris that may be interfering with its function.
  
• Check the Control Panel: Inspect the control panel for signs of corrosion or loose connections. Clean and secure all connections to ensure proper operation.
  
• Replace Faulty Controls: If cleaning doesn’t resolve the issue, consider replacing worn-out controls or switches with new ones.
  

Conclusion
Skyjack lifts are powerful tools that significantly enhance productivity, but they require proper maintenance and occasional troubleshooting to ensure they operate smoothly. By regularly inspecting key components like the battery, hydraulic system, and electrical wiring, you can avoid common issues that may lead to costly repairs and downtime.
If you encounter issues with your Skyjack lift, always start by conducting a thorough inspection to identify the cause. Whether it’s a dead battery, hydraulic leak, or electrical malfunction, addressing the root cause promptly can help restore the lift to optimal performance.
Remember, regular maintenance is key to extending the life of your lift and avoiding unexpected breakdowns. Following these troubleshooting tips can help you keep your Skyjack lift running efficiently and safely.