Part of the Kubota Repair Manuals.
OEM #9Y011-02702 covers one engine family: the 3.8L four-cylinder direct-injection diesel that powered dozens of machines. Its 142 pages cover servicing specifications, clearance data, and tightening torques, with detailed coverage of the cylinder block, E-CDIS center direct injection system, and dynamic balancer assembly. A full troubleshooting section and maintenance schedule run from the initial 50-hour break-in through every 3,000-hour major service. Torque the M10 cylinder head screws to 77.5 to 90.2 N·m, then confirm compression sits above the 2.90 MPa allowable limit before the head goes back on. With the engine apart on the stand, pull the factory number instead of guessing. Section bookmarks drop you straight onto torques, clearances, or troubleshooting, and keyword search finds any spec in seconds.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety First | 3-5 | Danger, Warning, Caution, Important, Note, Before Servicing and Repairing, Safety Starting, Safety Working |
| Specifications | 6 | Model, Number of Cylinder, Type, Bore X Stroke, Total Displacement, Iso Net Continuous, Iso / Sae Net Intermittent, Sae Gross Intermittent |
| Performance Curves | 7-8 | V3800DI-E2B Performance Curves (Brake Horsepower, Engine Speed, B.S.F.C., Torque, Net Intermittent Torque, Net Continuous Torque, Gross Continuous Torque, Gross, Overload, Continuous) |
| Dimensions | 9 | Unit of Measurement, V3800DI-E2B Dimensions, V3800DI-T-E2B Dimensions |
| General | 10-49 | Engine Identification (Model Name and Engine Serial Number, Cylinder Number), Maintenance Check List |
| Mechanism | 50-64 | Feature, Engine Body (Cylinder Block, Half-Floating Head Cover, Cylinder Head, Center Direct Injection System, Piston, Built-In Dynamic Balancer), Lubricating System (Oil Cooler) |
| Troubleshooting | 66-69 | |
| Servicing Specifications | 70-76 | |
| Tightening Torques | 77-79 | Tightening Torques for General Use Screws, Bolts and Nuts, Tightening Torques for Special Use Screws |
| Checking, Disassembling and Servicing | 80-142 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil capacity | 13.2 L (3.49 U.S.gals) | p. 6 |
| Cooling water capacity | 11.0 L (2.91 U.S.gals) | p. 6 |
| Compression Pressure (Allowable Limit) | 2.90 MPa (29.6 kgf/cm², 421 psi) | p. 70 |
| Fan Belt Tension (Factory Spec) | 10.0 to 12.0 mm / 98 N (10 kgf, 22 lbs) | p. 75 |
| Thermostat Valve Opening Temperature (Factory Spec) | 74.5 to 78.5 °C | p. 75 |
| Injection Timing (Factory Spec) | 0.21 to 0.24 rad (12° to 14°) before T.D.C. | p. 76 |
| Injection Pressure (1st stage, Factory Spec) | 18.63 to 19.61 MPa (190 to 200 kgf/cm², 2702 to 2845 psi) | p. 76 |
| M10 Standard Screw Tightening Torque | 39.2 to 45.1 N·m (4.0 to 4.6 kgf·m, 28.9 to 33.3 ft·lbs) | p. 77 |
| Valve Stem to Valve Guide Clearance (Intake, Factory Spec) | 0.055 to 0.085 mm | p. 71 |
| Piston Ring Gap (Top Ring, Factory Spec) | 0.30 to 0.45 mm | p. 74 |
