Yanmar 2TNV70, 3TNV70, 3TNV76 Industrial Engines Service Manual (tp6703)

These little Yanmar TNV industrial engines usually live in skid steers, mini-excavators, compact lifts and pumps, working in dust, mud, and cold starts all day. This service manual is what I’d pull when I need to confirm a problem before ordering parts—for example, tracing a hard-start issue to a fuel timing or valve clearance problem instead of guessing at injectors. It walks you through the logic: inspect, measure, adjust, then decide if anything actually needs replacing.

Applications & Use Cases

• Track down low power complaints by systematically checking air, fuel, and compression using the manual’s diagnostic flow.
• Isolate fuel system faults and verify bleed and priming procedures after filter or line work.
• Follow the correct disassembly/assembly order on the top end so you don’t misalign gears or damage seals.
• Set and re-check valve clearances and external linkages after a head job or major adjustment.
• Confirm torque patterns and tightening sequences when reinstalling covers, manifolds, and brackets.

FAQ

Q: Can I use this on a tablet in the field?

A: Yes, it’s practical to keep it as a PDF on a tablet or laptop so you can zoom diagrams and search steps by keyword.

Q: Is it worth printing sections?

A: Many techs print only the procedures they’re doing that day and keep them next to the engine to avoid scrolling with dirty hands.

Safety Note

Always lock out the machine and prevent accidental starting before working on or near these engines.

Yanmar 2TNV70, 3TNV70, 3TNV76 Industrial Engines Index:

Table of Contents.
Introduction
Yanmar Warranties………………………….
Safety..
General Service Information .
Periodic Maintenance
Engine
Fuel System
Cooling System .
Lubrication System ….. ….. ….. ….. ….. ………..
Starter Motor………………………………………..
Alternator .
Electric Wiring …
Troubleshooting ………………

Kohler