Hydraulic and Electric Problems on Fermec 965 (2000 Model): Diagnosis and Solutions

[MikePhua]

Introduction to the Problem
The thread discusses issues with a Fermec 965 (2000 model) machine that is experiencing both hydraulic and electrical problems. These issues are affecting the machine's performance, and the user seeks advice from other operators and technicians who may have encountered similar problems. The combination of hydraulic and electrical failures is particularly tricky to diagnose, as both systems are interdependent in modern machinery.
Symptoms of the Issue
The user reports that the Fermec 965 exhibits symptoms related to both the hydraulic and electrical systems. The machine shows a lack of hydraulic power or responsiveness at times, and the electrical system seems to intermittently fail. The combination of these issues makes it difficult for the machine to operate efficiently, especially during tasks requiring strong hydraulic performance.

1. Hydraulic Issues: The hydraulic system either lacks power or becomes sluggish after a period of use. This could result in slower operations for the boom, arm, or bucket functions, or even a complete failure of the hydraulic system to respond.
   
2. Electrical Problems: The electrical system intermittently fails, potentially affecting key components like the starter, relays, or sensors. The user mentions issues such as lights flickering or the engine struggling to start, which suggests a possible electrical fault.
   

Possible Causes of the Problem
Several potential causes for the issues were discussed:

1. Hydraulic Fluid Issues: The most common cause of hydraulic problems is a lack of hydraulic fluid, contamination, or the presence of air in the system. If the hydraulic fluid is low or dirty, it can cause the system to operate inefficiently or fail to deliver the necessary pressure to power the machine's functions.
   
2. Faulty Hydraulic Pump or Valve: Another possible issue is a malfunctioning hydraulic pump or valve. A failing pump may struggle to supply the required pressure, or a faulty valve may prevent fluid from reaching the appropriate hydraulic circuits.
   
3. Electrical Connection Problems: The electrical system might be suffering from poor connections, such as corroded or loose terminals, particularly around the battery or alternator. This can lead to intermittent electrical failures, as the voltage may fluctuate or be insufficient for the electrical components to operate reliably.
   
4. Blown Fuses or Faulty Relays: A blown fuse or malfunctioning relay could also cause electrical problems in the system, resulting in the failure of crucial components like sensors or control units. An electrical component that is failing could cause a temporary shutdown of specific functions or overall system failure.
   
5. Sensor Malfunctions or Wiring Issues: Many modern machines, including the Fermec 965, rely on sensors to control hydraulic functions. If these sensors are faulty or if there are issues with the wiring, it can affect the hydraulic operation and cause erratic behavior in the machine.
   

Troubleshooting Steps
Several troubleshooting steps were recommended to diagnose and fix the problems:

1. Check Hydraulic Fluid Levels and Quality: The first step should be to check the hydraulic fluid level and condition. If the fluid is low, it should be topped up, and if it appears dirty, it should be replaced. Additionally, ensure that there are no air pockets in the hydraulic lines.
   
2. Inspect Hydraulic Pump and Valves: If the fluid is fine, the hydraulic pump and valves should be inspected for wear and tear. A pump that is not generating adequate pressure may need to be replaced or repaired, and any faulty valves should be serviced.
   
3. Examine Electrical Connections: Inspect all electrical connections, especially the battery terminals, alternator, and fuse box. Look for signs of corrosion, loose wires, or damaged connectors. Cleaning and tightening the connections may resolve some of the intermittent electrical issues.
   
4. Test Fuses and Relays: Check for blown fuses and faulty relays. If any are found, replace them and ensure that all electrical components are getting the power they need to function properly.
   
5. Check Sensors and Wiring: If the machine has sensors controlling hydraulic functions, test these components for correct operation. Any malfunctioning sensors or wiring should be repaired or replaced.
   

Conclusion
The hydraulic and electrical issues on the Fermec 965 (2000 model) are likely caused by a combination of hydraulic fluid problems, faulty components, and electrical connection issues. By following the troubleshooting steps—checking fluid levels, inspecting the hydraulic system, ensuring electrical connections are secure, and testing fuses and sensors—operators can isolate and resolve the underlying issues. Regular maintenance and prompt attention to problems can help prevent such failures from recurring in the future.