Part of the Kubota Repair Manuals.
This is the Kubota Shop Manual for the D1703-M-DI-E4B and D1503-M-E4BG diesel engines, covering the 03-M-DI-E4B and 03-M-E4BG Series. It runs 149 pages with a full text layer, publication number 9Y111-09676.
The manual moves from engine identification and maintenance checks through the mechanism of the engine body, cooling, and fuel systems, then into detailed servicing: troubleshooting, servicing specifications, tightening torques, and step by step disassembly and assembly.
Owners and independent mechanics can use it to set valve clearance, torque the cylinder head, diagnose hard starting and power loss, and rebuild these engines to factory spec. Wiring diagrams, performance curves, and dimension data support work on both the direct injection D1703 and the E4BG variant.
What's Inside This Kubota 03-Series Diesel Engines Manual
| System | Pages | Key Topics |
|---|---|---|
| General | Engine Identification, General Precautions, Maintenance Check List, Check and Maintenance, Special Tools | |
| Mechanism | Engine Body, Cooling System, Fuel System | |
| Servicing | Troubleshooting, Servicing Specifications, Tightening Torques, Checking and Adjusting, Disassembling and Assembling, Servicing Components |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head screw | 93.2 to 98.0 N·m | p. 77 |
| Screw 1 of main bearing case | 46 to 50 N·m | p. 77 |
| Screw 2 of main bearing case | 69 to 73 N·m | p. 77 |
| Nozzle holder assembly (DI) torque | 35 to 39 N·m | p. 77 |
| Injection Pressure (1st Stage) | 18.7 to 20.1 MPa | p. 75 |
| Battery | 12 V, 60 AH (75D26R) | p. 9 |
| Regulating voltage at no load | 13.8 to 14.8 V | p. 94 |
| Compressed air pressure for cleaning | less than 210 kPa | p. 28 |
| Speed Sensor Voltage (Harness Side) | 5 V | p. 95 |
| Pump Element Fuel Tightness (Allowable limit) | 18.6 MPa | p. 75 |
| Valve Clearance (When Cold) | 0.18 to 0.22 mm | p. 69 |
