07-04-2025, 06:08 PM
The auxiliary hydraulic system failure on a John Deere 320D skid steer can impact the machine's work efficiency, especially when using attachments that require additional hydraulic power. The auxiliary hydraulics are typically used to power various attachments, such as buckets, breakers, and other tools. When this system malfunctions, it can prevent attachments from functioning properly. Below is a troubleshooting guide and solutions for the auxiliary hydraulic system not working on the JD 320D.
1. Check Hydraulic Fluid Level and Quality
One of the most common causes of hydraulic system issues is low hydraulic fluid levels or poor-quality fluid. Start by checking the hydraulic fluid level to ensure it is within the normal range. If the fluid is low, add the appropriate amount. Additionally, inspect the hydraulic fluid's quality to ensure it has not become contaminated or degraded. If the fluid is dirty or old, it is recommended to replace it.
2. Inspect Fuses and Electrical Circuits
The auxiliary hydraulic system on the JD 320D is controlled by electrical circuits, so electrical faults can prevent the system from functioning. Check the fuses and electrical circuits related to the hydraulic system to ensure there are no broken or shorted connections. If a fuse is blown or the wiring is damaged, replace the faulty components promptly.
3. Check Hydraulic Pump and Control Valve
The hydraulic pump and control valve are the core components of the hydraulic system. If the pump is not operating correctly or the control valve is stuck, the auxiliary hydraulic system will not work. Inspect the hydraulic pump to confirm it is producing sufficient pressure. Check the control valve to ensure it is not stuck or malfunctioning. If issues are found, repair or replace the faulty parts.
4. Inspect Hydraulic Hoses and Fittings
Hydraulic hoses and fittings may experience wear, leakage, or loosening over time, leading to inadequate hydraulic pressure or system failure. Inspect all hydraulic hoses and fittings to ensure they are free from cracks, leaks, or looseness. If any hoses are damaged, replace them, or tighten any loose fittings as necessary.
5. Check Auxiliary Hydraulic Control Switch
The auxiliary hydraulic system on the JD 320D is typically operated via a control switch. If the control switch is malfunctioning, the system will not activate. Inspect the control switch to ensure it is responsive and free from any issues like sticking or damage. If the switch is defective, it should be repaired or replaced.
6. Use Diagnostic Tools
If the issue cannot be identified through the standard checks, it is recommended to use diagnostic tools to read fault codes. Diagnostic tools can help monitor the system's operation in real-time and pinpoint the cause of the failure, allowing you to take targeted corrective actions.
Conclusion
The auxiliary hydraulic system failure on the JD 320D skid steer can be caused by low hydraulic fluid, electrical issues, hydraulic pump or control valve malfunctions, hose leakage, or a faulty control switch. By checking the hydraulic fluid, electrical circuits, hydraulic pump, control valve, hoses, and the control switch, you can effectively troubleshoot and resolve the issue. Regular maintenance and the use of diagnostic tools will help maintain the hydraulic system's functionality and extend the equipment's service life.
1. Check Hydraulic Fluid Level and Quality
One of the most common causes of hydraulic system issues is low hydraulic fluid levels or poor-quality fluid. Start by checking the hydraulic fluid level to ensure it is within the normal range. If the fluid is low, add the appropriate amount. Additionally, inspect the hydraulic fluid's quality to ensure it has not become contaminated or degraded. If the fluid is dirty or old, it is recommended to replace it.
2. Inspect Fuses and Electrical Circuits
The auxiliary hydraulic system on the JD 320D is controlled by electrical circuits, so electrical faults can prevent the system from functioning. Check the fuses and electrical circuits related to the hydraulic system to ensure there are no broken or shorted connections. If a fuse is blown or the wiring is damaged, replace the faulty components promptly.
3. Check Hydraulic Pump and Control Valve
The hydraulic pump and control valve are the core components of the hydraulic system. If the pump is not operating correctly or the control valve is stuck, the auxiliary hydraulic system will not work. Inspect the hydraulic pump to confirm it is producing sufficient pressure. Check the control valve to ensure it is not stuck or malfunctioning. If issues are found, repair or replace the faulty parts.
4. Inspect Hydraulic Hoses and Fittings
Hydraulic hoses and fittings may experience wear, leakage, or loosening over time, leading to inadequate hydraulic pressure or system failure. Inspect all hydraulic hoses and fittings to ensure they are free from cracks, leaks, or looseness. If any hoses are damaged, replace them, or tighten any loose fittings as necessary.
5. Check Auxiliary Hydraulic Control Switch
The auxiliary hydraulic system on the JD 320D is typically operated via a control switch. If the control switch is malfunctioning, the system will not activate. Inspect the control switch to ensure it is responsive and free from any issues like sticking or damage. If the switch is defective, it should be repaired or replaced.
6. Use Diagnostic Tools
If the issue cannot be identified through the standard checks, it is recommended to use diagnostic tools to read fault codes. Diagnostic tools can help monitor the system's operation in real-time and pinpoint the cause of the failure, allowing you to take targeted corrective actions.
Conclusion
The auxiliary hydraulic system failure on the JD 320D skid steer can be caused by low hydraulic fluid, electrical issues, hydraulic pump or control valve malfunctions, hose leakage, or a faulty control switch. By checking the hydraulic fluid, electrical circuits, hydraulic pump, control valve, hoses, and the control switch, you can effectively troubleshoot and resolve the issue. Regular maintenance and the use of diagnostic tools will help maintain the hydraulic system's functionality and extend the equipment's service life.
