Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the SQ-1120B-AU-B, SQ-1150B-AU-B, SQ-3140B-AU-B, SQ-3200B-AU-B and SQ-3300B-AU-B diesel generators, built around Kubota's D1703-EBG, V2203-EBG and V3300-EBG engines. It runs 181 pages in English (publication 9Y111-16030) with servicing specifications, tightening torques, checking procedures and troubleshooting.
The manual is organized into Information, General, Engine, Generator and Servicing sections, covering the diesel powerplant and the generating end (stator, exciter, rotor and AVR). Owners, standby power installers and independent mechanics can diagnose no output and voltage faults, service the engine, set injection and valve specs and confirm the correct torque and capacity values for each SQ model. It downloads as a fully searchable PDF you can read on any device or print by section for field service.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 3-12 | |
| General | 13-38 | Handling Precautions for Electrical Parts and Wiring, Lubricants/Fuel/Coolant, Tightening Torques, Maintenance Check List |
| Servicing Specifications | 42-50 | Troubleshooting, D1703-EBG/V2203-EBG Specs, V3300-Ebg Specs, Injection Pump, Tightening Torques |
| Checking and Adjusting | 51-60 | Engine Body, Lubricating System, Cooling System/Fan Belt, Fuel System (Injection Pump/Nozzle), Electrical System (Starter/Glow Plug/Alternator) |
| Disassembling and Assembling | 61-85 | Fuel System, Lubricating System, Electrical System |
| V3300-Ebg Disassembly | 86-103 | Cylinder Head and Valves, Gear Case, Piston and Connecting Rod, Flywheel and Crankshaft, Injection Nozzle, Injection Pump Assembly |
| Engine Servicing | 104-109 | Cylinder Head Servicing Specs, Timing Gear and Camshaft Clearances |
| Piston and Connecting Rod | 110-115 | Piston Ring Clearance, Connecting Rod bend/twist, Pin Bore Wear Limits |
| Crankshaft | 116-124 | Cylinder Bore, Oil Pump, Crankshaft Journal Wear Limits, Bearing Clearances |
| Fuel Feed Pump | 125-132 | Starter, Oil Pump, Cylinder Bore, Alternator, Fuel Gauge |
| Generator | 133-159 | Generating Method (Principle of Operation), Structure (Stator, Exciter, Rotor, Avr), Avr Connection Diagram, Stator Coil Winding, Wiring Diagrams |
| Servicing | 160-181 | Engine Circuit Troubleshooting, External Component, Stator/Rotor/Exciter Coil Specs, Initial Excitation Method, Control Panel |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SQ-1120B-AU-B, SQ-3140B-AU-B | ||
| Engine oil capacity (SQ-1120B-AU-B, SQ-3140B-AU-B) | 5.6 L | p. 22 |
| SQ-1150B-AU-B, SQ-3200B-AU-B | ||
| Engine oil capacity (SQ-1150B-AU-B, SQ-3200B-AU-B) | 7.6 L | p. 22 |
| Cooling System Capacity | 7.4 L | p. 22 |
| SQ-1120B-AU-B | ||
| Generator Output, SQ-1120B-AU-B | 11.2 kVA (11.2 kW) | p. 10 |
| SQ-3300B-AU-B | ||
| Generator Output, SQ-3300B-AU-B | 30 kVA (24 kW) | p. 10 |
| Engine Oil Capacity, SQ-3300B-AU-B | 13.2 L | p. 22 |
| All Models | ||
| M10 Bolt Tightening Torque (No-grade or 4T) | 40 to 45 N·m | p. 23 |
| Fuel Injection Nozzle Injection Pressure Factory Specification | 13.73 to 14.71 MPa | p. 49 |
| Alternator Regulating Voltage Factory Specification | 14.2 to 14.8 V | p. 50 |
| D1703-EBG, V2203-EBG | ||
| Cylinder Head Surface Flatness Allowable Limit | 0.05 mm | p. 45 |
| Valve Clearance Factory Specification | 0.18 to 0.22 mm | p. 45 |
| Starter Commutator O.D. Factory Specification | 30.0 mm | p. 50 |
