Part of the Kubota Repair Manuals.
This Kubota workshop manual covers the BG-series diesel engines used in standby power generators, spanning 16 model codes from the D905-BG and D1005-BG up to the V3300-BG and V4702-BG. Its 81 pages gather the specifications, dimensions, features and servicing data for the whole BG family in one PDF.
You get full specifications and dimensional drawings for each engine, the governor and fuel system description, SAE flywheel and housing details, and the servicing specifications for the engine body, lubricating, cooling, fuel and electrical systems. Maintenance intervals and gear case disassembly close out the book.
Because these engines are grouped by series rather than by single code, this manual is the reference for confirming clearances, torque and adjustment values across BG variants. Whether you are chasing hard starting, overheating or low compression, download the PDF and use it on any device.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Instructions | Safety First, Danger, Warning, Caution, Important, Note, Safety Servicing and Repairing | |
| Specifications | D905-Bg-Sae, D1005-Bg-Sae, V1205-Bg-Sae, V1305-Bg-Sae, D1105-Bg-Sae, V1505-Bg-Sae, D1403-Bg-Sae, D1703-Bg-Sae | |
| Dimensions | D905-Bg, D1005-Bg, D1105-Bg, V1205-Bg, V1305-Bg, V1505-Bg, D1403-Bg, D1703-Bg | |
| Feature | Main Features of "Bg" Type Engines (Quite Power, High-Capacity Governor and Largesize Flywheel, Economical Fuel Consumption, Low Maintenance Cost, Quick and Easy Starting, Sae Standard Housing and Flywheel, Kubota Diesel Engine for Standby Power Generator, Usable Both at 50 Hz and 60 Hz, Clean Exhaust Gas, Large-Capacity Alternator, Easy to Operate) | |
| Fuel System | Governor, General, Governor Regulation | |
| General | Applications (General, Direct Connection to Housing, Operating Mechanism, Supporting Method, Covering), Sae Flywheel & Flywheel Housing for "Bg" Type, Servicing Specifications | |
| Servicing Specifications | Series (Engine Body, Lubricating System, Cooling System, Fuel System, Electrical System) | |
| Maintenance Interval (Engine Oil and Oil Filter Cartridge) | Changing Engine Oil, Changing Oil Filter Cartridge, Lubricating Oil | |
| Engine Body | Disassembling and Assembling (Gear Case, Speed Control Plate, Fork Lever, Mm Stroke Series, Governor Spring and Speed Control Plate) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| D905-BG, D1005-BG, D1105-BG, V1205-BG, V1305-BG, V1505-BG | ||
| Oil filter cartridge replacement interval (Initial) | 50 hrs | p. 77 |
| Oil filter cartridge replacement interval (Regular) | Every 300 hrs | p. 77 |
| Glow plug resistance (D905-BG, D1005-BG, D1105-BG, V1205-BG, V1305-BG, V1505-BG) | 1.0 to 1.2 Ω | p. 57 |
| Fan belt tension (D905-BG, D1005-BG, D1105-BG, V1205-BG, V1305-BG, V1505-BG) | 7 to 9 mm/10 kgf (0.28 to 0.35 in./10 kgf, 22.1 lbs.) | p. 56 |
| Radiator cap air leakage (D905-BG, D1005-BG, D1105-BG, V1205-BG, V1305-BG, V1505-BG) | 10 seconds or more (0.9→0.6 kgf/cm², 88→59 kPa, 13→9 psi) | p. 56 |
| Thermostat's valve opening temperature | 69.5 to 72.5°C (157.1 to 162.5°F) | p. 56 |
| Temperature at which thermostat completely opens | 85°C (185°F) | p. 56 |
| D1403-BG, D1703-BG, V1903-BG, V2203-BG, V2003-T-BG, F2803-BG | ||
| Glow plug resistance (D1403-BG, D1703-BG, V1903-BG, V2203-BG, V2003-T-BG, F2803-BG) | 0.8 Ω | p. 63 |
| Fan belt tension (D1403-BG, D1703-BG, V1903-BG, V2203-BG, V2003-T-BG, F2803-BG) | 10 to 12 mm/10 kgf (0.394 to 0.472 in./22.1 lbs.) | p. 62 |
| Radiator cap air leakage (D1403-BG, D1703-BG, V1903-BG, V2203-BG, V2003-T-BG, F2803-BG) | 10 seconds or more (0.9→0.6 kgf/cm², 88→59 kPan2, 13→9 psi) | p. 62 |
| D905-BG, D1005-BG, V1205-BG, V1305-BG, D1105-BG, V1505-BG, D1403-BG, D1703-BG, V1903-BG, V2203-BG, F2803-BG, V2003-T-BG, V3300-BG, V3300-T-BG, D3502-BG, V4702-BG | ||
| Governor Regulation | Less than 5% | p. 6 |
| Cylinder Head Surface Flatness (Allowable Limit) | 0.05 mm | p. 52 |
