Part of the Kubota Repair Manuals.
This is the Kubota workshop manual for the V2003-T-B and F2503-T-B turbocharged diesel engines, publication 9Y011-03060, a 114-page English service reference. These engines power a range of compact machines, and the manual is written for shop-level repair rather than day-to-day operation.
It walks through engine specifications and dimensions, engine identification and the full tightening-torque tables, then checking and adjusting the engine body, lubricating, cooling, and fuel systems, and finally the electrical system with starter and alternator disassembly, testing, and service. Factory specs cover compression pressure, valve clearance, injection timing and pressure, oil pressure, and thermostat opening temperature.
Mechanics and rebuilders can use it to diagnose faults, measure parts against factory limits, and reassemble the V2003-T-B and F2503-T-B to specification.
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Instructions | 3-5 | Safety First, Before Servicing and Repairing, Safety Starting, Safety Working, Avoid Fires, Ventilate Work Area, Prevent Acid Burns, Dispose of Fluids Properly |
| Specifications | 6 | Engine Specifications (Model, Number of Cylinders, Type, Bore X Stroke, Total Displacement) |
| Dimensions | 7 | Engine Dimensions, Dimensions Table (V2003-T-B, F2503-T-B), Engine Dimensions Diagram |
| General | 34-60 | Engine Identification (Model Name and Engine Serial Number, Cylinder Number), Tightening Torques (Special Use Screws, Bolts and Nuts, General Use Screws, Bolts and Nuts) |
| Engine Body | 61-94 | Draining Water and Oil, External Components, Cylinder Head and Valves, Gear Case, Piston and Connecting Rod, Flywheel and Crankshaft, Cylinder Head, Timing Gear and Camshaft |
| Lubricating System | 95-96 | Checking (Engine Oil Pressure), Servicing (Oil Pump, Rotor Lobe Clearance, Clearance Between Rotor and Cover) |
| Cooling System | 97-99 | Checking (Fan Belt, Radiator, Thermostat Valve Opening Temperature, Radiator Water Leakage, Radiator Cap Air Leakage) |
| Fuel System | 100-103 | Checking and Adjusting (Injection Pump, Injection Timing, Fuel Tightness of Pump Element, Fuel Tightness of Delivery Valve, Injection Nozzle, Nozzle Injection Pressure, Nozzle Spraying Condition, Valve Seat Tightness) |
| Electrical System | 104-114 | Checking (Starter, Glow Plug), Disassembling and Assembling (Starter, Alternator), Servicing (Starter |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Cylinder head bolt tightening torque | 93.1 to 98.0 N-m (9.5 to 10.0 kgf-m, 68.7 to 72.3 ft-lbs) | p. 36 |
| Connecting rod bolt tightening torque | 44.1 to 49.0 N-m (4.5 to 5.0 kgf-m, 32.5 to 36.2 ft-lbs) | p. 36 |
| Lubricating oil capacity (90 mm oil pan) | 8.3 L | p. 52 |
| Lubricating oil capacity (124 mm oil pan) | 10.2 L | p. 52 |
| Flywheel bolt tightening torque | 98.0 to 107.8 N-m | p. 36 |
| Compression Pressure (Factory Spec) | 3.53 to 3.72 MPa | p. 40 |
| Valve Clearance (Cold) | 0.18 to 0.22 mm | p. 40 |
| Engine Oil Pressure (At Idle Speed, Allowable Limit) | 49 kPa | p. 45 |
| Thermostat's Valve Opening Temperature | 69.5 to 72.5 °C | p. 45 |
| Fuel Injection Pressure (Factory Spec) | 13.73 to 14.71 MPa | p. 46 |
| V2003-T-B | ||
| Injection Timing (V2003-T-B) | 0.31 to 0.35 rad. (18 to 20°) Before T.D.C. | p. 46 |
| F2503-T-B | ||
| Injection Timing (F2503-T-B) | 0.30 to 0.33 rad. (17 to 19°) Before T.D.C. | p. 46 |
