Part of the Kubota Repair Manuals.
This is the factory Kubota Diagnostic Manual for the V6108-CR-TIE4 common rail diesel engine (publication 9Y110-01860), the Tier 4 powerplant used in Kubota tractors. Across 317 pages it walks a technician through the common rail system, active tests, symptom-based diagnosis, and the full DTC procedure list, so you can trace a fault to its actual cause instead of swapping parts.
The manual documents the mechanism and wiring of the fuel and intake systems, normal monitor values such as target rail pressure and SCV current, and step-by-step diagnostic routines keyed to each diagnostic trouble code. It also covers connector inspection methods for verifying wiring faults.
You get an instant PDF download you can search, print, and keep on the bench or laptop while you diagnose an engine warning light, a rail pressure problem, or a fuel leak.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Common Rail System Mechanism | 7-24 | Basic System Information, System Configuration, Fuel System, Intake and Exhaust System, Wiring Diagram, System Wiring Diagram, Available Data Monitor Signals (Level 2), Monitor Items |
| Active Test and Supply Pump Difference Learning | 43-44 | Injector Non-Injection Instruction, EGR Actuation Test, Glow Relay Actuation Test, Supply Pump Difference Learning, Operating Conditions → Specified Tool Conditions |
| Diagnosis by Malfunction Symptom | 45-86 | List of Malfunction Causes by Symptom, Engine Warning Light Comes on |
| Diagnostic Procedure by Dtc | 87-283 | Dtc List, Ne - G Phase Shift, Intake Air Temperature Built-In Maf Sensor: Abnormality, Pressure Limiter Emergency Open, High Rail Pressure, SCV Stuck, Fuel Leak |
| Inspection Procedure for Each System | 284-316 | ECU Circuit), Measure the ECU +Bp and Ground Voltage, Check the Relay Terminal Voltage -1, Check the Relay Terminal Voltage - 2, Check the Relay Terminal Voltage - 3, Check the Relay Terminal Voltage - 4, Check the Relay Terminal Voltage - 5, Check the Relay Terminal Voltage - 6 |
| Contact Information | 317 | Editor, Kubota Farm & Industrial Machinery Service, Ltd., Kubota Corporation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel filter replacement interval | every 500 operation hours | p. 306 |
| Air cleaner element cleaning interval | every 250 hours | p. 301 |
| Engine Speed (Idling) | 800 to 850 min⁻¹ (rpm) | p. 16 |
| Engine Speed (No-load Maximum Speed) | 2350 to 2400 min⁻¹ (rpm) | p. 16 |
| Boost Pressure (Approx.) | 100 kPa | p. 16 |
| Battery Voltage (Stopped) | Approx. 12.5 V | p. 16 |
| Battery Voltage (Operating) | Approx. 14 V | p. 16 |
| Target Rail Pressure (Idling) | 40 to 50 MPa | p. 17 |
| Target Rail Pressure (No-load Maximum Speed) | 95.0 to 115 MPa | p. 17 |
| Target Suction Control Valve (SCV) Current (Idling) | Approx. 1800 mA | p. 17 |
| DPF Regeneration Time Interval (High Frequency) | within 30 min. | p. 139 |
| Air Cleaner Element Cleaning/Replacement Interval | every 250 hours | p. 301 |
