All 264 pages of this Yanmar 2TNV70, 3TNV70, and 3TNV76 Service Manual (OEM #0BTNV-G00202) target one job: returning your 2009–2012 industrial engine to factory condition. Inside you get wiring diagrams, fuel system and lubrication schematics, exploded assembly views, and a full troubleshooting section that runs from quick-reference symptom tables to step-by-step compression pressure tests. Torque tables, periodic maintenance schedules, and complete procedures for the starter motor and alternator cover every system your engine relies on. Head bolts torque to 40–43 ft·lb (53.9–57.9 N·m); plan your fuel filter swap at the 500-hour mark. No more hunting forums for specs your machine was built with from day one. Bookmarked by chapter and keyword-searchable, it opens on your phone right there at the machine.
What's Inside This Yanmar 2TNV70, 3TNV70, 3TNV76 Manual
| System | Pages | Key Topics |
|---|---|---|
| Yanmar Warranties | 7-14 | Yanmar Limited Warranty, Emission System Warranty, Yanmar Co., Ltd. Limited Emission Control System Warranty - Usa Only |
| Safety | 15-30 | - |
| General Service Information | 31-60 | Component Identification, Location of Labels, Epa / Arb Emission Control Regulations - Usa Only, Emission Control Labels, The 97/68/EC Directive Certified Engines, Engine Family |
| Periodic Maintenance | 61-86 | Introduction, Precautions, Periodic Maintenance Schedule, Periodic Maintenance Procedures |
| Engine | 87-146 | Before You Begin Servicing, Introduction, Cylinder Head Specifications, Camshaft and Timing Gear Train Specifications, Crankshaft and Pistons Specifications |
| Fuel System | 147-174 | Before You Begin Servicing, Introduction, Fuel System Specifications, Special Service Tools, Measuring Instruments, Fuel System Diagram, Fuel System Components |
| Cooling System | 175-184 | Before You Begin Servicing, Introduction, Cooling System Diagram, Engine Coolant Pump Components, Engine Coolant System Check, Engine Coolant Pump |
| Lubrication System | 185-194 | Before You Begin Servicing, Introduction, Oil Pump Service Information, Lubrication System Diagram, Checking Engine Oil Pressure, Trochoid Oil Pump |
| Starter Motor | 195-214 | Before You Begin Servicing, Introduction, Starter Motor Information, Starter Motor Specifications, Starter Motor Troubleshooting, Starter Motor Components |
| Alternator | 215-234 | Before You Begin Servicing, Introduction, Standard and Optional Dynamo Information, Standard and Optional Alternator Information, Alternator Specifications, Dynamo Specifications |
| Electric Wiring | 235-242 | Electric Wiring Precautions, Electric Wire Resistance, Battery Cable Resistance, Electrical Wire Sizes - Voltage Drop, Conversion of Awg to European Standards |
| Troubleshooting | 243-264 | Special Service Tools, Troubleshooting by Measuring Compression Pressure, Quick Reference Table for Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder Head Bolts Tightening Torque | 40 - 43 ft·lb (53.9 - 57.9 N·m; 5.5 - 5.9 kgf·m) | p. 99 |
| Fuel Filter Replacement Interval | Every 500 hours of Operation | p. 78 |
| Applicable Fuel Filter Part No. | 119810-55650 | p. 79 |
| Stop Solenoid Pull Coil Amperage Draw | 36.5 Amp | p. 151 |
| Stop Solenoid Hold Coil Amperage Draw | 0.5 Amp | p. 151 |
| Fuel Injector Pressure (used parts) | 1784 - 1929 psi (12.3 - 13.3 MPa; 125 - 136 kgf/cm²) | p. 152 |
| Fuel Injector Pressure (new injectors) | approximately 72.5 psi (0.5 MPa; 5 kgf/cm²) higher than used parts | p. 152 |
| Cylinder Head Gasket Replacement | Install a new cylinder head gasket | p. 115 |
| Primary Strainer Warning | NEVER remove the primary strainer (if equipped) from the fuel tank filler port. | p. 43 |
| Mesh Filter Part No. | 171081-55910 | p. 80 |
| Rubberized Fuel Hoses Replacement Interval | every two years or every 2000 hours of engine operation, whichever comes first | p. 43 |
| High-Pressure Fuel Injection Line Nuts Tightening Torque | 22 - 25 ft·lb (29 - 34 N·m; 3.0 - 3.5 kgf·m) | p. 152 |
Yanmar 2TNV70, 3TNV70, 3TNV76 Common Problems This Manual Covers
Yanmar 2TNV70 cranks but will not start after filter service or running the tank dry p. 255
Check the fuel shutoff solenoid: measure pull-coil amperage draw, which should reach 36.5 Amp per page 151. Verify the tank has fuel and the system is free of air; bleed per the chart on page 255 if needed. Also inspect the mesh filter (part no. 171081-55910) for blockage at the tank pickup.
Manual Section: Fuel SystemEngine starts, runs rough and surges under load, then stalls and shuts off p. 255
Inspect the tank pickup screen (part no. 171081-55910) for partial blockage; this mimics air ingress and causes intermittent surging. Squeeze rubber fuel hoses for internal collapse; replace them every 2,000 hours or two years as noted on page 43. Bleed the system and work through the surging chart on page 255 to isolate remaining causes.
Manual Section: Fuel SystemCoolant overheats or pressurizes after head gasket replacement, exhaust gas in coolant p. 180
Pressure-test the cooling system: it should hold 10.8 - 14.8 psi (75 - 105 kPa) per page 180. If pressure drops or exhaust gas appears in the coolant, remove the head and check both mating surfaces for warping before fitting a new gasket. Torque head bolts to 40 - 43 ft·lb (53.9 - 57.9 N·m) in the correct sequence, per page 99.
Manual Section: Cooling SystemEngine loses power, blows excessive smoke, and becomes hard to start after deferred service p. 249
Check valve clearance first: the gap should be 0.006 - 0.010 in. (0.15 - 0.25 mm) per page 55, adjusted every 1,000 hours. Measure compression pressure per the procedure on page 246; a significant drop points to worn rings, valve seats, or gasket issues. Send injectors for spray-pattern testing at the 1,500-hour service interval noted on page 83.
Manual Section: TroubleshootingNew fuel filter and solenoid installed, but engine still starves and cuts out p. 255
Remove and clean the mesh filter (part no. 171081-55910) in the tank; even a partial blockage chokes delivery under load. Verify the solenoid hold coil draws a steady 0.5 Amp per page 151. Intermittent coil dropout cuts fuel with no hard fault code. Check the clogged strainer and supply charts on page 255 if both items test good.
Manual Section: Fuel SystemFrequently Asked Questions
What are the torque specs for the Yanmar TNV-series industrial engines?
The manual provides specific torque specifications for various components. For instance, Cylinder Head Bolts require 40 - 43 ft·lb (53.9 - 57.9 N·m; 5.5 - 5.9 kgf·m) of torque, while Connecting Rod Bolts require 17 - 20 ft·lb (22.6 - 27.5 N·m; 2.3 - 2.8 kgf·m). These values are to be applied with lubricating oil on the thread portion and seat surface.
How do I adjust or calibrate the fuel injection system on a Yanmar TNV engine?
Fuel injection timing can be checked and adjusted using a "spill-timing" tool. To adjust fuel injector pressure, shims can be added or removed, with approximately 100 - 142 psi (0.69 - 0.98 MPa; 7 - 10 kgf/cm²) pressure change for every 0.004 in. (0.1 mm) shim thickness. New injectors (less than 5 hours of operation) will read approximately 72.5 psi (0.5 MPa; 5 kgf/cm²) higher than used ones.
How do I bleed the fuel system on a Yanmar 3TNV76?
To prime the fuel system, if equipped with an electric fuel pump, turn the key switch to the ON position for 10 to 15 seconds. If a mechanical fuel pump is installed, operate the fuel priming lever several times until the fuel filter cup is filled with fuel. Do not use the starter motor to prime the fuel system.
What are the replacement specifications for the TNV engine fuel filter?
The fuel filter should be replaced every 500 hours of operation. For 2TNV70, 3TNV70, and 3TNV76 engines, the applicable fuel filter part number is 119810-55650. It is important to use clean diesel fuel and prevent dirt and debris from contaminating the fuel system.
How quickly can I access this manual after buying?
A 264-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Am I able to print pages from this manual?
There are no print restrictions. The PDF is DRM-free — print whatever sections you need for the shop. Standard letter or A4 paper works.
Are hydraulic system diagrams included in this Yanmar TNV engine service manual?
No, this manual does not include hydraulic system diagrams. It focuses on the engine's mechanical, fuel, cooling, lubrication, starter, alternator, and electrical wiring systems.
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