Engine Dies When Using Hydraulics: Troubleshooting and Solutions

[MikePhua]

In heavy machinery, the hydraulic system plays a vital role in performing various tasks. However, in some cases, when operating the hydraulic system, the engine may stall or lose power. This issue typically indicates a problem with the hydraulic system that is affecting the engine’s normal operation. This article will analyze the possible causes of this problem and provide solutions to resolve it.
Common Causes

1. Hydraulic System Overload
   When the hydraulic system is overloaded, the engine may not be able to provide enough power to support the hydraulic system’s operation, causing the engine to stall. Hydraulic system overload is often related to blockages, leaks, or damaged components within the system, which disrupt the smooth flow of hydraulic oil and prevent the system from working efficiently.
   
2. Low or Contaminated Hydraulic Fluid
   Low hydraulic fluid levels or poor-quality oil can prevent the hydraulic pump from getting enough flow, causing the system to malfunction. Contaminated hydraulic fluid increases friction in the system, overloading the hydraulic pump, which in turn affects the engine’s performance and can ultimately lead to stalling.
   
3. Engine Fuel Supply Issues
   If there are problems with the engine’s fuel supply system, such as a clogged fuel filter or a faulty fuel pump, the engine may not receive enough fuel to operate properly. When the hydraulic system requires additional power, the engine may fail to supply enough fuel, resulting in a stall.
   
4. Electrical System Failure
   In some cases, electrical system issues may cause the engine to stall. Insufficient battery voltage, loose wiring, or faulty electrical components may prevent the engine from running properly. Electrical issues may become more apparent when operating the hydraulic system, leading to the engine stalling.
   

Troubleshooting and Solutions

1. Check the Hydraulic System
   The first step is to inspect the hydraulic system for blockages, leaks, or damaged components. Check the hydraulic fluid quality and level to ensure it is clean and sufficient. If the fluid is contaminated or low, replace it and clean the system’s filters.
   
2. Inspect the Engine Fuel System
   Inspect the fuel filter and fuel pump to ensure the fuel system is functioning properly. If issues are found, replace the fuel filter or repair the fuel pump as necessary. Additionally, ensure the fuel supply system is providing adequate fuel to avoid engine stalling.
   
3. Examine the Electrical System
   Check the battery voltage to ensure it is sufficiently charged, and inspect the wiring and electrical components for any loose connections or corrosion. If there are electrical issues, repair or replace the faulty components to ensure stable power supply to the engine.
   
4. Adjust Hydraulic Load
   If the hydraulic system is overloaded, causing the engine to stall, check the load on the hydraulic equipment. Avoid operating the equipment beyond its capacity. If necessary, adjust the hydraulic system settings or replace damaged components to ensure the system operates within the proper load range.
   

Preventive Measures

1. Regular Hydraulic and Fuel System Inspections
   Regularly inspect the hydraulic and fuel systems to ensure all components are functioning properly. Replace hydraulic fluid and fuel filters as needed, and avoid oil quality issues that could lead to hydraulic or engine failures.
   
2. Maintain the Electrical System
   Keep the electrical system in good condition by periodically checking the battery, wiring, and electrical components. Prevent electrical issues from causing engine stalls by ensuring the system is operating correctly.
   
3. Proper Use of Hydraulic Equipment
   Avoid overloading the hydraulic system during operation. Ensure the system works within its designed load capacity. Regularly check the system’s pressure and flow to maintain optimal performance.
   

Conclusion
Engine stalling when using the hydraulic system is typically caused by hydraulic system overload, poor oil quality, insufficient fuel supply, or electrical system issues. Regular maintenance of the hydraulic, fuel, and electrical systems, along with early detection and repair of problems, can prevent engine stalls. Proper use and maintenance of the equipment are essential for ensuring smooth and efficient operation.