Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the OC60-E2 and OC95-E2 oil-cooled single-cylinder diesel engines across 106 pages. It is organized in three parts, General, Mechanism, and Servicing, so you can move from engine identification and maintenance intervals through to full disassembly and rebuild.
Inside you get factory servicing specifications, tightening torques, troubleshooting charts, and step by step checking, disassembling, and assembling procedures. Whether you are setting valve clearance, testing nozzle injection pressure, or measuring piston ring gap and crankshaft clearances, the values and methods come straight from Kubota.
Owners and independent mechanics use it to service the fuel, lubricating, cooling, and electrical systems correctly, keeping the E2 engine running instead of guessing at a repair.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 2-5 | Manual Overview, Safety Precautions, Engine Identification, E2 Engine Features, Lubricants and Fuel Types |
| Maintenance Schedule | 20 | Daily Checks, 25-Hour Checks, 100-Hour Checks, 500-Hour Checks, 800-Hour Checks, 1500-Hour Checks, Annual Checks, Biennial Checks |
| Check and Maintenance Procedures (General) | 21-25 | Engine Oil Level, Fuel Hose and Clamp Bands, Oil Strainer Cleaning, Air Cleaner Element, Fuel Filter, Valve Clearance, Nozzle Injection Pressure |
| Special Tools | 26-33 | Puller Set, Piston Ring Compressor, Connecting Rod Alignment Tool, Nozzle Tester, Press Gauge, Compression Tester, Oil Seal guides/installers |
| Engine Features & Body Mechanism | 35-37 | Low Noise, Lightweight Design, Fuel Economy, Balancer System, Cylinder Head, Crankcase, Cylinder Liner, Uniaxial Balancer |
| Lubricating System Mechanism | 38-39 | Trochoid Pump, Oil Strainer, Oil Pump Operation, Oil Pressure Switch Function |
| Cooling System Mechanism | 40 | Air-Cooled Cylinder Block, Oil-Cooled Combustion Area, Oil Cooler Design |
| Fuel System Mechanism | 41-48 | Fuel Flow, Injection Pump Elements, Delivery Valve, Injection Nozzle, Fuel Filter, Governor Mechanism (OC60-E2, OC95-E2) |
| Electrical System Mechanism | 49-51 | Starting System, Charging System, Key Switch, Alternator, Regulator, Wiring Diagrams |
| Troubleshooting | 53-55 | Engine No-Start, Rough Revolution, Exhaust Gas Color, Deficient Output, Oil Consumption, Fuel Mixed in Oil, Oil Pressure Issues, Overheating |
| Servicing Specifications | 56-61 | Engine Body Specs, Lubricating System Specs, Fuel System Specs, Electrical System Specs, Clearances, Pressures, Dimensions |
| Tightening Torques | 62-63 | Special Use Screws, General Use Screws, Bolt Grades, N-M, Kgf-M, Ft-Lbs Values |
| Checking and Adjusting Procedures | 64-74 | Compression Pressure, Valve Clearance, Top Clearance, Engine Oil Pressure, Injection Timing, Fuel Tightness, Nozzle Spray, Battery Voltage |
| Disassembling and Assembling Procedures | 75-92 | Draining Fluids, External Components, Cylinder Head, Valves, Injection Pump, Nozzle, Side Cover, Piston |
| Servicing Procedures (Detailed) | 93-105 | Cylinder Head Flatness, Valve Recessing, Valve stem/guide Clearance, Piston Pin Bore, Piston Ring Gap, crankshaft/camshaft Clearances, Oil Pump Clearances |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| OC60-E2 | ||
| Cylinder head screws torque, OC60-E2 | 51.9 to 56.8 N·m (5.3 to 5.8 kgf·m, 38.3 to 42.0 ft-lbs) | p. 62 |
| OC95-E2 | ||
| Cylinder head screws torque, OC95-E2 | 68.6 to 73.6 N·m (7.0 to 7.5 kgf·m, 50.6 to 54.2 ft-lbs) | p. 62 |
| All Models | ||
| Fuel filter cleaning interval | Every 500h | p. 20 |
| Fuel filter changing interval | Every 800h | p. 20 |
| Oil strainer cleaning interval | Initial 25h, Every 100h | p. 20 |
| Oil strainer replacement condition | If deformed or broken | p. 22 |
| Oil strainer construction | Double wounds stainless steel net (50 meshes) with magnets | p. 38 |
| Nozzle injection pressure (Factory spec) | 13.9 to 14.7 MPa (142 to 150 kgf/cm², 2019 to 2133 psi) | p. 24 |
| Nozzle holder body and nut tightening torque | 97 to 116 N·m (10 to 12 kgf·m, 73 to 88 ft-lbs) | p. 88 |
| Gaskets and O-rings replacement rule | Must be replaced during reassembly | p. 17 |
| Low oil pressure warning lamp threshold | Below 49 kPa (0.5 kgf/cm², 7 psi) | p. 39 |
| Engine oil pressure at idle speed (Factory spec) | 49 kPa or more (0.5 kgf/cm² or more, 7 psi or more) | p. 66 |
