Part of the Yanmar Repair Manuals.
Need the factory procedures for your Yanmar EF-series diesel tractor? This 189-page Yanmar EF227H/EF230H/EF233H/EF235H Technical Manual PDF covers every system on all four machines: engine, HST transmission, front and rear axle, power steering, hydraulic lifting unit, and full electrical equipment. Inside: hydraulic schematics tracing the complete lifting circuit and power steering oil flow, plus full wiring diagrams for the starting, charging, preheating, fuel, warning, safety, and cabin circuits. You also get a dedicated HST troubleshooting section, exploded development views for the transmission and axle internals, and torque tables throughout. Set the 3TNV82A head bolts to 61.7-65.7 N·m and run the front wheel fixing bolts to 118-147 N·m before your first field pass. No more hunting through forums for specs your dealer won't share. Bookmarked by section and searchable by keyword: grab your tablet, walk to the machine, and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Items and Services | 6-19 | Safety Work (Location of Safety Signs, Identification and Hour Meter of Tractor, Periodical Check Items, Oil, Grease and Anti-Freezing Fluid, Capacity of Oils and Water) |
| Specifications | 20-21 | |
| General | 22-47 | Periodical Check Items (Checking and Changing Oils, Replacing Each Element, Checking and Changing Cooling Water, Checking and Filling Fuel, Air Bleed From Fuel, Cleaning and Replacing the Radiator Screen and the Air Cleaner Element, Checking and Replacing the Battery, Checking Pipes and Hoses, Checking Electrical Wiring, Locations of Applying Grease, Checking and Adjusting the Brakes, Checking and Adjusting the Steering Wheel, Checking and Adjusting the Fan Belt, Checking and Adjusting Toe-In, Checking and Replacing the Fuses and the Slow Blow Fuses, Checking the Tires) |
| Engine | 48-69 | Structure and Functions (Overview, Fuel System, Combustion System, Lubricating Oil System, Cooling Water System, Maintenance Standards), Removing the Fuel Injection Pump |
| Transmission | 70-103 | Transmission Mechanism, HST (Outline, Outline of Operation, Maintenance Standards, Troubleshooting) |
| Front Axle | 104-109 | Structure and Functions (Front Wheel Alignment), Disassembly and Reassembly (Maintenance Standards, Development View, Replacing the Axle) |
| Rear Axle and Brake | 110-121 | Structure and Functions (Structure of Differential Gear Unit, Structure of Braking Device) |
| Power Steering | 122-127 | Structure and Functions (Components, Operation of Power Steering Valve and Flow of Oil), Checks and Adjustments (Measuring the Power Steering Relief Pressure, Troubleshooting) |
| Hydraulic Lifting Unit | 128-143 | Structure and Functions (Hydraulic Circuit, Components) |
| Electrical Equipment | 144-185 | Engine Starting Circuit, Charging Circuit, Preheating Circuit, Fuel Circuit, Warning Circuit, Safety Circuit, Cabin Circuit |
| Appendixes | 186-188 | Hydraulic Circuit Diagram, Electrical Wiring Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Head bolt torque (3TNV82A) | 61.7 to 65.7 N·m (6.3 to 6.7 kgf·m) | p. 65 |
| Fixing bolt for front wheel and disc axle torque | 118 to 147 N·m (12 to 15 kgf·m) | p. 37 |
| Sub-tank cooling water quantity | 0.4 Liters | p. 27 |
| Thermostat valve opening temperature (Q type) | 82°C | p. 59 |
| Radiator screen cleaning method | Pull up the radiator screen and remove straw chips and dust with compressed air | p. 28 |
| Hydraulic oil filter line filter specification | 145 to 35 μ | p. 131 |
| Starter S-terminal -- starter conductivity | About 0 (with conductivity) | p. 148 |
| Starter B-terminal -- starter conductivity | ∞ (without conductivity) | p. 148 |
| Grease application interval | Every 50 hours | p. 31 |
