Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the SQ-1120, SQ-1150, SQ-3140, SQ-3200, and SQ-3300 diesel generators in both STD and AUS versions, built around the D1703-EBG, V2203-EBG, and V3300-EBG engines. It is a 171 page PDF you download once and keep on any device.
The manual is split between the generator end and the engine. You get specifications, dimensions, tightening torque tables, and a maintenance check list, followed by full disassembly and servicing for the stator, rotor, exciter, AVR, and control panel, then the engine body, lubricating, cooling, fuel, and electrical systems.
With it you can chase down voltage faults, service the injection pump and nozzles, set valve clearances, and work through the factory troubleshooting charts with the correct clearances and torque figures in hand.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Instructions | 3-6 | Safety First, Before Servicing and Repairing, Safety Starting, Safety Working, Avoid Fires, Ventilate Work Area, Prevent Acid Burns, Dispose of Fluids Properly |
| Specifications | 7-10 | Sq-1120-Std, Sq-1150-Std, Sq-3140-Std Specifications, Sq-3200-Std, Sq-3300-Std Specifications, Sq-1120-Aus, Sq-1150-Aus, Sq-3140-Aus Specifications |
| Dimensions | 11 | Dimensions Overview, Generator Dimensions Diagram, Model Dimensions Table |
| Servicing General | 46-55 | General Identification, Lubricants, Fuel and Coolant, Troubleshooting |
| Tightening Torques | 69 | Tightening Torques Overview, Tightening Torques for Special Use Screws, Bolts and Nuts, Tightening Torque Table |
| Maintenance Check List | 70 | Maintenance Check List Overview, Service Interval Table, Maintenance Schedule |
| Check and Maintenance | 71-73 | Check Points of Daily, Check Points of Initial 50 Hours, Check Points of Every 100 Hours, Check Points of Every 200 Hours, Check Points of Every 400 Hours |
| Special Tools | 74-84 | Valve Seat Cutter Set, Diesel Engine Compression Tester, Oil Pressure Tester, Press Gauge, Special-Use Puller Set, Connecting Rod Alignment Tool, Red Check, Flywheel Puller |
| Generator Disassembling and Assembling | 85-86 | External Component, Cover, Panel, Control Panel and Bonnet, Generator, End Bracket, Stator Assembly |
| Generator Servicing | 87-93 | Terminal Voltage for Each Part During Normal Periods, Stator Coil, Rotor Coil, Exciter Coil, Initial Excitation Method, Control Panel, Emergency Relay Activates |
| Engine Body | 94-147 | Checking and Adjusting, Disassembling and Assembling, Servicing |
| Lubricating System | 148-150 | Checking, Disassembling and Assembling, Servicing |
| Cooling System | 151-153 | Checking (Fan Belt, Radiator, Thermostat), Disassembling and Assembling (D1703 V2203, V3300) |
| Fuel System | 154-158 | Checking and Adjusting (Injection: Pump, Nozzle), Disassembling and Assembling (Injection: Nozzle, Pump Assembly) |
| Electrical System | 159-171 | Checking, Disassembling and Assembling, Servicing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Standard Screw and Bolt (Grade 4) M6 | 7.9 to 9.3 N-m | p. 70 |
| Standard Screw and Bolt (Grade 4) M8 | 17.7 to 20.6 N-m | p. 70 |
| Engine oil checking interval | Daily | p. 70 |
| Engine oil changing interval | Initial 50 hours, Every 200 hours | p. 70 |
| Generator Frequency | 50 Hz | p. 7 |
| Regulated Voltage Value | 1.5 % | p. 56 |
| Cylinder Head Surface Flatness Allowable Limit | 0.05 mm | p. 58 |
| Camshaft Alignment Allowable Limit | 0.01 mm | p. 61 |
| SQ-1120-STD, SQ-1120-AUS, SQ-3140-STD, SQ-3140-AUS | ||
| Engine oil capacity (SQ-1120-STD, SQ-1120-AUS, SQ-3140-STD, SQ-3140-AUS) | 5.6 L (5.92 U.S.qts., 4.93 Imp.qts.) | p. 47 |
| SQ-1150-STD, SQ-1150-AUS, SQ-3200-STD, SQ-3200-AUS | ||
| Engine oil capacity (SQ-1150-STD, SQ-1150-AUS, SQ-3200-STD, SQ-3200-AUS) | 7.6 L (8.03 U.S.qts., 6.69 Imp.qts.) | p. 47 |
| D1703-EBG, V2203-EBG | ||
| Compression Pressure Allowable Limit | 2.55 MPa / 250 rpm | p. 58 |
| Valve Clearance Factory Spec | 0.18 to 0.22 mm | p. 58 |
