Description

Yanmar 2TNV70-NBK, 2TNV70-HGE Parts Catalog – OEM Factory Specs

I’ve been turning wrenches for twenty-eight years. One thing that wastes more time than a seized bolt? Ordering the wrong part because you used a generic number from some online forum. This Yanmar 2TNV70-NBK, 2TNV70-HGE Parts Catalog is the real deal – a factory-issued PDF, 27 pages, straight from the people who designed the engine. If you’re rebuilding a Cylinder head or tracking down a Fuel injection line, you need the exact OEM part number. Otherwise you’re playing roulette with your machine’s downtime and your wallet.

The catalog matches engines manufactured since December 2004. That’s important because Yanmar made changes over the years. You don’t want a Camshaft gear that doesn’t mesh. The catalog lists every component – from the Crankshaft assembly down to the last gasket. And it tells you when a part was superseded with an interchangeability symbol. That alone saves you from buying a part that won’t fit.

16 Sections Covering Every Assembly

The table of contents is laid out like a logical teardown. Section 1 covers the Cylinder Block. Section 2 the Gear Housing. Section 3 the Flywheel Housing and Oil Sump. Section 4 the Cylinder Head and Bonnet. Section 5 the Exhaust Manifold. Section 6 the Camshaft and Driving Gear. Section 7 the Crankshaft and Piston. Section 8 the Lubrication Oil System. Section 9 the Cooling Water System. Section 10 the Fuel Injection Pump. Section 11 the Governor. Section 12 the Fuel Injection Valve. Section 13 the Fuel Line. Section 14 the Starting Motor. Section 15 the Generator. Section 16 the Gasket Set. Each section has an exploded diagram and a corresponding parts list with OEM numbers. No guesswork.

Parts Number Index: Find It Fast

At the back there’s a PartsNo Index. That’s the key when you have an old part in your hand but no idea what it’s called. Look up the number stamped on the casting, cross-reference it to the diagram, and order the replacement. I’ve used this index on a 2TNV70-NBK that had a bad Valve. Five minutes, done. Compare that to pulling three different aftermarket catalogs and still getting the wrong stem seal.

Does This Catalog Cover the Fuel System?

Yes, sections 10 through 13 cover everything from the injection pump to the line and nozzle. The Fuel injection valve (section 12) includes the part number for the nozzle assembly and the washer. Don’t trust a generic nozzle – Yanmar uses specific spray patterns and pressure settings. The catalog lists the correct part for both the 2TNV70-NBK and 2TNV70-HGE. The Cooling system is section 9 – water pump, thermostat, housing gaskets. All OEM numbers.

Why You Want OEM Documentation, Not Aftermarket

Aftermarket parts catalogs often redraw the illustrations and sometimes get the part number wrong – I’ve seen it. This Yanmar 2TNV70-NBK, 2TNV70-HGE Parts Catalog is a direct scan of the factory publication. The part numbers are the same ones Yanmar uses in their global system. When you call a dealer, you can give them the exact number from this catalog and they’ll ship the right part. No cross-referencing. No “that might fit.” Also note the preface: parts may change without notice, but this catalog is the baseline. And it tells you the interchangeability – whether an old part can be replaced by a new one, or if you need a whole assembly. That kind of detail keeps you from ordering a single seal when the whole pump was redesigned.

How many pages is this catalog?

27 pages.

What is the difference between the 2TNV70-NBK and 2TNV70-HGE in terms of parts?

The catalog covers both models in one document. The engine serial number determines which parts apply. For example, the Fuel Injection Pump in section 10 lists different part numbers depending on the engine code suffix. The catalog includes a column for each model variant (A through F) so you can match your engine’s serial number to the correct part. This is critical because the HGE version often has a different governor or injection pump than the NBK. Don’t assume they’re identical – check the column for your engine’s effective machine number. The catalog also uses interchangeability symbols: N for new, R for replacement, K for discontinued. Read the directions on page 2 and page 3 – I’ve seen guys skip that and order a discontinued part.

If you’re working on any Yanmar engine, you need factory data. For related manuals, check the Ammann Yanmar B12 B17 1991 Parts Catalog – OEM Factory Specs, the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs, and the Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM. For context on why OEM specs matter in the automotive industry, see this Automotive Industry Overview. Access the Factory Manual and keep it in your shop tablet – it’ll pay for itself the first time you avoid a wrong order.

Automotive Industry Overview