Why can two identical tractors fail for completely different reasons? And more importantly, why do some engine problems keep coming back on Kubota, John Deere, and New Holland machines, even with regular maintenance? The truth is that many issues are known… but often misdiagnosed. In this article, we uncover the most frequent engine failures your technicians encounter—without always knowing the real cause.
Modern agricultural engines are powerful and reliable… yet highly sensitive. Emission systems, electronics, sensors, engine management—everything is interconnected.
Time required without advanced tools: several hours, sometimes days
Time with Jaltest INFO Web: 30 to 60 minutes to identify the true problem
Difficulty level: High without technical data, guided and manageable with Jaltest
The most common engine failures
1. Emission System Issues (DPF / SCR / EGR)
Brands affected: Kubota, John Deere, New Holland
Symptoms: power loss, limp mode, excessive fuel consumption
Actual causes: 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 (Pressure, Temperature, Air Flow)
Very common on Common Rail engines.
A single sensor can trigger a false “serious engine fault.”
👉 Jaltest allows technicians to compare real vs. expected values, avoiding unnecessary replacements.
3. Partially Clogged Injectors
Particularly common on John Deere and New Holland
Symptoms: hard starting, power loss, vibrations
Common mistake: replacing all injectors without testing
👉 Jaltest guides the technician through targeted testing, injector by injector.
4. Fuel Pressure Issues
Clogged filter, worn low-pressure pump, air intake leaks
Often confused with electronic problems
👉 Jaltest INFO Web provides fuel system schematics and precise check points.
5. Engine Electronic Control (ECU) Faults
Missing software updates
Inconsistent engine parameters
👉 Jaltest detects software errors often invisible without manufacturer-level tools.
Step-by-Step: How to Diagnose Correctly with Jaltest INFO Web
- Connect to the tractor via the diagnostic port
- Read all engine fault codes
- Guided analysis for each code
- Direct access to schematics, component locations, and procedures
- Targeted interventions (no unnecessary disassembly)
- Final validation with live data readings
💡 Result: fewer errors, less time lost, higher reliability
What You Gain
- Reduced repetitive failures
- Time savings on each diagnosis
- Technician skill development
- Clear engine history for each machine
Engine failures on Kubota, John Deere, and New Holland are not inevitable. Today, the difference is not just experience—it’s having the right technical information at the right time. With Jaltest INFO Web, your technicians stop guessing and start diagnosing with certainty.
🚜 Want to see how Jaltest detects these failures in real conditions?
👉 Request your free demo now and discover how to turn engine diagnostics into fast, reliable, and profitable interventions.
