Part of the Yanmar Operator Manuals.
Air trapped in the fuel lines will keep a TNV diesel cranking without firing, and the priming procedure in the Before You Operate section is where to start before you condemn the injection pump. That section, along with the troubleshooting chart and its fault list for electronically controlled engines, does the diagnostic work while your genset, pump, or bare engine on the stand sits idle and the day slips away.
Yanmar publication 0ATNV-EN0019 is the 166 page operator manual for 30 TNV industrial engine models, from the two cylinder 2TNV70 through the 3TNV70, 3TNV76, 3TNV82A, 3TNV84, 3TNV88, 4TNV84, 4TNV88, 4TNV94L, 4TNV98, and 4TNV106 families, turbocharged variants included.
Inside are diesel fuel and oil specifications, starting and cold start procedure, the full periodic maintenance schedule, long term storage steps, and a Specifications section listing bore and stroke, displacement, and normal oil pressure for each model, the numbers you check before the engine goes back to work running clean.
What's Inside This Yanmar TNV Series Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-4 | Record of Ownership, Symbol Explanation |
| Yanmar Warranties | 9-24 | Yanmar Limited Warranty (What Is Covered by This Warranty?, How Long Is the Warranty Period?, What the Engine Owner Must Do:, To Locate an Authorized Yanmar Industrial Engine Dealer or Distributor:, What Yanmar Will Do:, What Is Not Covered by This Warranty?, Warranty Limitations:, Warranty Modifications:, Questions:, Retail Purchaser Registration) |
| Safety | 25-36 | Safety Statements, Safety Precautions (Before You Operate, During Operation and Maintenance) |
| Product Overview | 37-60 | Yanmar Tnv Engine Features and Applications, Component Identification, Location of Labels (Engine Nameplate, Emission Certification Labels, EPA/ARB Labels, Eu Labels) |
| Before You Operate | 61-80 | Diesel Fuel (Specifications, Filling the Fuel Tank, Priming the Fuel System), Engine Oil (Specifications, Viscosity, Checking Engine Oil, Adding Engine Oil, Capacity) |
| Engine Operation | 81-86 | Starting Engine, Cold Start Device, Checking the Engine During Operation, Adjust Engine Speed, Shutting Down the Engine |
| Periodic Maintenance | 87-114 | Precautions (Importance of Periodic Maintenance, Performing Periodic Maintenance, Importance of Daily Checks, Keep a Log of Engine Hours and Daily Checks, Yanmar Replacement Parts, Tools Required, Ask Your Authorized Yanmar Industrial Engine Dealer or Distributor for Help, Required EPA/ARB Maintenance Usa Only, EPA/ARB Installation Requirements Usa Only, Tightening Fasteners) |
| Troubleshooting | 115-124 | Troubleshooting Chart, Troubleshooting of Electronic Control System, Troubleshooting Information, List of Possible Faults of Electronically Controlled Engines |
| Long-Term Storage | 125-128 | Before You Place the Engine in Long-Term Storage, Returning the Engine to Service |
| Specifications | 129-166 | General, Principal Engine Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 4TNV98-E | ||
| Glow plug type | Air heater (DC 12 V/500 W) | p. 148 |
| 4TNV98-Z | ||
| Glow plug type | Air heater (DC 12 V/500 W) | p. 149 |
| 2TNV70 | ||
| Normal oil pressure at rated engine speed | 0.29 - 0.44 MPa | p. 132 |
| Normal oil pressure at low idle speed | 0.06 MPa | p. 132 |
| 2TNV70 Bore x Stroke | ø70 × 74 mm | p. 131 |
| 2TNV70 Displacement | 0.570 L | p. 131 |
| 2TNV70 No. of Cylinders | 2 | p. 131 |
| 4TNV106 | ||
| 4TNV106 Bore x Stroke | ø106 × 125 mm | p. 136 |
| 4TNV106 Displacement | 4.412 L | p. 136 |
| 4TNV106 No. of Cylinders | 4 | p. 136 |
Yanmar TNV Series Common Problems This Manual Covers
Cranks but will not fire
Air in the fuel system after a filter change or a run-dry tank is the usual culprit on these engines. The manual's fuel system priming procedure in Before You Operate bleeds the lines properly before you start pulling injection components.
Manual Section: Before You Operate p. 61Hard starting in cold weather
TNV engines lean on the cold start device when temperatures drop, and skipping it just wears the starter and battery. The Engine Operation section covers the cold start procedure along with normal starting, speed adjustment, and shutdown.
Manual Section: Engine Operation p. 81Oil pressure warning light on
The warning lamp cannot tell you whether the fault is a worn pump, a low sump, or a bad sender. The Specifications section lists normal oil pressure at rated speed and at low idle for each model, so a gauge reading settles the question.
Manual Section: Specifications p. 129Fault codes on electronic engines
The electronically controlled variants throw faults that leave you guessing without documentation. The Troubleshooting section includes a troubleshooting chart, electronic control system troubleshooting, and a list of possible faults for electronically controlled engines.
Manual Section: Troubleshooting p. 115Fuel contamination and clogged filters
Water and debris in diesel choke filters, cause rough running, and damage injection components over time. The Periodic Maintenance section sets the service intervals and daily checks that catch contamination before it reaches the pump.
Manual Section: Periodic Maintenance p. 87Problems after months in storage
An engine parked over a season without preparation comes back with fuel varnish, corrosion, and dry cylinders. The Long-Term Storage section covers both preparing the engine for storage and returning it to service correctly.
Manual Section: Long-Term Storage p. 125Frequently Asked Questions
Which Yanmar engine models does this manual cover?
It covers the TNV series industrial engines: the 2TNV70, 3TNV70, 3TNV76, 3TNV82A, 3TNV84, 3TNV88, 4TNV84, 4TNV88, 4TNV94L, 4TNV98 and 4TNV106, together with their variants, including the turbocharged 3TNV84T, 4TNV98T and 4TNV106T and the electronically controlled versions. The Specifications section, starting on page 129, gives the principal engine specifications model by model. It is Yanmar publication 0ATNV-EN0019, 166 pages in English.
Is this a workshop rebuild manual or an operator manual?
It is the factory operator manual, not a teardown workshop manual. It covers operation, fuel and oil specifications, periodic maintenance, troubleshooting, and storage. The Specifications section still gives bore and stroke, displacement, and normal oil pressure for every model, useful reference at the bench. p. 129
Does it help diagnose faults on electronically controlled TNV engines?
Yes. The Troubleshooting section includes a troubleshooting chart, dedicated troubleshooting of the electronic control system, and a list of possible faults for the electronically controlled engines. p. 115
Does it specify which fuel and engine oil to use?
Yes. The Before You Operate section covers diesel fuel specifications, filling and priming the fuel system, and engine oil specifications, viscosity, checking, adding, and capacity. p. 61
What format is this manual in?
A 166-page Operator Manual in searchable PDF format (5 MB), available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print a copy of this Yanmar 2TNV70 Operator Manual for the shop?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
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