Why can two identical tractors break down for completely different reasons?
And more importantly, why do the same engine problems keep coming back on Kubota, John Deere, and New Holland, even with regular maintenance?
The truth is simple: many engine issues are well known… but poorly diagnosed.
In this article, we uncover the most common engine failures your technicians face every day—often without identifying the real root cause.
Modern agricultural engines are powerful and reliable, but also highly sensitive. Emissions systems, electronics, sensors, and engine management are all connected. One small fault can affect the entire machine.
- Time required without advanced tools: several hours, sometimes days
- Time with Jaltest INFO Web: 30–60 minutes to identify the real fault
- Difficulty level: High without technical data, controlled and guided with Jaltest
The Most Common Engine Failures
1. Common Engine Failures Detected with Jaltest INFO Web Engine Diagnostics
Brands affected: Kubota, John Deere, New Holland
Symptoms:
- Power loss
- Limp mode
- High fuel consumption
Real cause:
- Incomplete regeneration
- Faulty NOx sensor
- Stuck EGR valve
👉 Jaltest INFO Web identifies the exact fault code and provides step-by-step inspection and cleaning procedures.
2. Faulty Engine Sensors and Jaltest Diagnostics
Very common on Common Rail engines
A single faulty sensor can trigger a false major engine failure.
👉 Jaltest allows technicians to compare real values with expected values, avoiding unnecessary and costly part replacements.
3. Partially Clogged Injectors
Especially common on John Deere and New Holland
Symptoms:
- Hard starting
- Power loss
- Engine vibrations
Common mistake: Replacing all injectors without testing.
👉 Jaltest guides the technician through targeted injector-by-injector testing.
4. Fuel Pressure Problems
- Clogged fuel filter
- Weak low-pressure pump
- Air leaks in the system
These issues are often mistaken for electronic failures.
👉 Jaltest INFO Web provides fuel system diagrams and precise test points to quickly locate the real cause.
5. Engine Electronic Management (ECU) Issues
- Missing software updates
- Inconsistent engine parameters
These faults are often invisible without manufacturer-level tools.
👉 Jaltest detects software and parameter errors that standard tools may miss.
Step-by-Step: How to Diagnose Correctly with Jaltest INFO Web
- Connect to the tractor via the diagnostic port
- Perform a full engine fault code scan
- Use guided analysis for each fault code
- Access wiring diagrams, component locations, and procedures
- Perform targeted repairs (no unnecessary disassembly)
- Validate the repair with real-time data monitoring
💡 Result: fewer mistakes, less downtime, and higher reliability.
What You Gain with Jaltest INFO Web
- Fewer repeated engine failures
- Faster diagnostics
- Improved technician skills
- Clear engine history for every machine
Conclusion
Engine failures on Kubota, John Deere, and New Holland are not inevitable.
What makes the difference today is not experience alone—but access to the right technical information at the right time.
With Jaltest INFO Web, your technicians stop guessing and start diagnosing with confidence.🚜 Want to see how Jaltest detects these failures in real working conditions?
👉 Request your free demo now and discover how to turn engine diagnostics into fast, reliable, and profitable repairs.
