Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the WG1605-E3 industrial engine in its gasoline, LPG, and natural gas versions. Across 160 pages it documents the engine from the cylinder block up, along with the identification, maintenance, and servicing information needed to keep it running.
The Engine section details the cylinder head, crankshaft, pistons, camshaft, and valve train, while the Servicing section carries troubleshooting for gasoline and gaseous fuel, service specifications, and tightening torques. You get exact figures for valve clearance, compression pressure, oil pressure, spark plug gap, and dozens of torque values.
It also covers engine identification, the maintenance check list, three way catalyst and emission requirements, and full wiring diagrams for each fuel configuration. Delivered as an instant PDF download, it opens on any device and prints cleanly for shop use.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Workshop Manual | 1-8 | Gasoline, Lpg, Natural Gas Engine, Wg1605-E3, Kubota |
| Information | 9-33 | Safety First (Before You Start Service, Start Safely, Operate Safely, Prevent a Fire, Keep a Good Airflow in the Work Area, Discard Fluids Correctly, Prevent Acid Burns, Prepare for Emergencies) |
| General | 34-66 | Engine Identification (Engine Model Name, Code Number and Engine Serial Number, Cylinder Number, Catalytic Muffler / Converter), Maintenance Check List |
| Engine | 67-91 | Engine Body (Cylinder Block, Positive Crankcase Ventilation System, Pcv Valve, Cylinder Head, Crankshaft, Piston and Piston Ring, Connecting Rod, Camshaft, Gear Shaft, PTO Shaft, Rocker Arm Assembly, Inlet and Exhaust Valves, Flywheel) |
| Troubleshooting | 92-95 | Troubleshooting for Gasoline Fuel, Troubleshooting for Lpg / Natural Gas Fuel |
| Service Specifications for Engine | 96-100 | |
| Tightening Torque | 101-102 | Tightening Torques of Screws, Bolts and Nuts for Special Use, Tightening Torques for General Use Screws, Bolts |
| Checking, Disassembling, and Servicing | 103-160 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head screw torque | 63.7 to 68.6 N·m | p. 101 |
| Connecting rod screw torque | 41.2 to 46.1 N·m | p. 101 |
| Engine oil capacity | 6.0 L (1.6 U.S.gals) | p. 14 |
| Checking engine oil level | Every 8 hrs (Daily) | p. 42 |
| Checking and fill coolant | Every 8 hrs (Daily) | p. 42 |
| Spark Plug Gap | 0.70 to 0.80 mm | p. 14 |
| Valve Clearance (Cold) | 0.145 to 0.185 mm | p. 96 |
| Compression Pressure | 1.27 MPa (13.0 kgf/cm²) | p. 96 |
| Fan Belt Deflection | 7.0 to 9.0 mm | p. 49 |
| Engine Oil Pressure (At idle speed) | 49 kPa (0.50 kgf/cm²) | p. 99 |
| Thermostat Valve Opening Temperature | 69.5 to 72.5 °C | p. 75 |
| Spark Plug Tightening Torque | 24.5 to 29.4 N·m | p. 101 |
