Part of the Yanmar Repair Manuals.
The fuel injection pump is where most rebuilds of these engines go right or wrong, and it gets the longest section in this book: pump service, injector work, and standard injection pressures for both the 4TNV98 and the 4TNE98. From there the manual widens out to the full engine, with crankshaft and piston specifications, cylinder block limits, cylinder head procedures, cooling, lubrication, and the starter motor.
This is the Yanmar service manual, publication SB4319E00, 246 pages in English as a downloadable PDF. It covers the engine itself, wherever yours happens to be installed, and finishes with troubleshooting charts, compression pressure standards, and a wiring diagram.
When the engine is apart on the stand and there is no one to call, this is the book that hands you the head bolt torque, the flatness limit, and the valve clearance before it goes back together.
Complete the set for your 4TNV98, 4TNE98
Other editions of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Service Manual | 1-2 | |
| Important Safety Information | 3-4 | Basic Safety Rules or Precautions, Safety Precautions and Warnings, Improper Operation, Lubrication, Maintenance or Repair, Product Damage, Notice Labels, Information |
| General Service Information | 5-30 | Component Identification, Location of Labels, Emission Control Labels, Major Engine Components, Cooling System Components, Diesel Fuel, Engine Oil |
| Periodic Maintenance | 31-64 | Before You Begin Servicing, Introduction, Periodic Maintenance Schedule, Periodic Maintenance Procedures, Daily, Every 50 Hours of Operation, Every 250 Hours of Operation |
| Engine | 65-140 | Before You Begin Servicing, Introduction, Crankshaft and Piston Specifications, Cylinder Block Specifications, Special Service Tools, Measuring Instruments, Cylinder Head |
| Fuel System | 141-202 | Before You Begin Servicing, 4Tnv98 Engine, Fuel System Specifications, Special Service Tools, Fuel System Diagram, Fuel System Components, Fuel Injection Pump |
| Cooling System | 203-211 | Before You Begin Servicing, Introduction, Engine Coolant Pump Components, Engine Coolant System Check |
| Lubrication System | 212-220 | Before You Begin Servicing, Introduction, Lubrication System Diagram, Checking Engine Oil Pressure |
| Starter Motor | 221-236 | Before You Begin Servicing, Introduction, Starter Motor Specifications, Starter Motor Troubleshooting, Starter Motor Components |
| Troubleshooting | 237-246 | Special Service Tools, Troubleshooting by Measuring Compression Pressure, Quick Reference Table for Troubleshooting, Troubleshooting Charts, Wiring Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Cylinder Head Bolt Torque | 76 - 83 ft·lb (103.1 - 112.9 N·m; 10.5 - 11.5 kgf·m) | p. 75 |
| Thermostat Valve Opening Temperature (Option) | 157°F - 163°F (70°C - 73°C) | p. 26 |
| Thermostat Valve Opening Temperature (Standard) | 176°F - 183°F (80°C - 84°C) | p. 26 |
| Used V-Belt Tension (Deflection) - Position A | 3/8 - 1/2 in. (10 - 14 mm) | p. 49 |
| Used V-Belt Tension (Deflection) - Position B | 1/4 - 3/8 in. (7 - 10 mm) | p. 49 |
| Cylinder Head Combustion Surface Distortion (Flatness) Standard | 0.0020 in. (0.05 mm) or less | p. 68 |
| Cylinder Head Combustion Surface Distortion (Flatness) Limit | 0.0059 in. (0.15 mm) | p. 68 |
| Engine Coolant Capacity (Engine Only) | 4.2 L | p. 24 |
| Intake / Exhaust Valve Clearance | 0.15 - 0.25 mm | p. 26 |
| 4TNV98 | ||
| Engine Oil Capacity (Upper Limit), 4TNV98 | 10.5 L | p. 19 |
| Fuel Injection Pressure (Standard) | 3133-3278 psi | p. 146 |
| 4TNE98 | ||
| Engine Oil Capacity (Upper Limit), 4TNE98 | 9.2 L | p. 19 |
