Kubota Skid Steer DEF Issues and Solutions

[MikePhua]

When using a Kubota Skid Steer, there are common issues that can arise with the DEF (Diesel Exhaust Fluid) system. DEF is used to reduce diesel engine emissions, but during operation, DEF system failures can affect machine performance and even cause the machine to stop working. Below are some common problems and their solutions.
Common Issues

1. DEF Warning Light
   If there is an issue with the DEF system, the warning light on the dashboard will typically illuminate. Operators need to pay attention to this, as it may indicate low fluid levels, poor quality, or issues with the injection system.
   
2. Low DEF Fluid Levels
   Low DEF fluid levels are one of the most common problems. Operators should regularly check the DEF fluid level to ensure it is sufficient. If the DEF level is too low, the vehicle will display a warning and could lead to decreased engine performance.
   
3. DEF Injection System Failure
   If the injection system fails, it may cause the machine's emissions to be non-compliant, ultimately affecting the machine’s operation. Common causes of injection system failure include clogged nozzles or sensor malfunctions.
   
4. DEF Quality Issues
   DEF fluid quality issues can also cause the machine to operate erratically. Low-quality DEF fluid can clog the injection system, affecting the operation of the emissions control system.
   

Solutions

1. Check and Refill DEF Fluid
   First, the operator should check the DEF fluid level to ensure it is at the required level. If it is low, the appropriate DEF fluid should be added. Using the DEF fluid recommended by the manufacturer is crucial to ensuring proper machine operation.
   
2. Clean the Injection System
   If the injection system is malfunctioning, check the nozzles and sensors to ensure there are no blockages or damage. Regular cleaning of the nozzles helps prevent dirt and sediment buildup, keeping the injection system functioning properly.
   
3. Replace Low-Quality DEF Fluid
   If DEF fluid quality is suspected to be poor, replace the fluid immediately. Purchase certified DEF fluid to avoid using unverified sources that could potentially damage the system and impact its performance.
   
4. Check Sensors and Electrical Circuit
   If the system warning persists, check the sensors and electrical circuit in the DEF system to ensure all components are functioning properly. Faulty sensors or electrical issues should be repaired or replaced promptly.
   

Conclusion
Kubota Skid Steers may encounter DEF system issues, but most problems can be solved with regular checks, adding high-quality DEF fluid, and cleaning the injection system. Keeping the DEF system in good condition not only extends the machine’s life but also ensures its emissions meet environmental standards, reducing its environmental impact.