Description

Yanmar 3TNA72LUBA Parts Catalog – 34 Pages OEM Factory Specs

You are standing over a 3TNA72LUBA that has an oil leak from the gear housing cover. You pull the cover, see a part number scratched off, and the local parts counter says they need the OEM number or they can’t help. That lost day costs you billable hours and a pissed-off customer. This Parts Catalog – 34 pages from Yanmar’s own printing – gives you the exact part numbers, quantities, and diagram callouts so you order the correct seal, gasket, or bolt the first time. No aftermarket cross-reference to waste time on.

CYLINDER BLOCK & GEAR HOUSING – Part Callouts You Can Trust

Page 2 lays out the cylinder block assembly with every plug, bolt, and main bearing listed by Yanmar part number. Need the cylinder head bolt? It’s item 13: 119620-01200, and you get 14 of them. The gear housing on page 4 shows the oil seal (HTC456208) and the shim set (119620-01950). If you’re shimming the crank end play, that shim pack (119623-01950) is what you need – not a generic stack. These diagrams are not scanned from a third-party copy; they are the original factory layout with exploded views and indexed part numbers.

Does This Manual Cover the Fuel System and Governor?

Yes. The contents include FUEL INJECTION DEVICE, FUEL LINE, and GOVERNOR sections. The governor section (page 13 in the PDF) shows the linkage parts and spring numbers. If you are chasing a hunting idle or a no-start, you can trace the fuel line from the injection pump to the nozzle using the FUEL LINE diagram. But remember – this is a parts catalog, not a service manual. You get the part numbers to order; you will need the Ammann Yanmar B12 B17 Parts Catalog for those models if you have mixed fleet equipment.

34 Pages – What You Actually Get

Twenty-two sections from CYLINDER BLOCK through TOOL & GASKET SET (OPTIONAL). Each section is a table of part numbers, descriptions, quantities, and notes for supersessions (like the non-asbestos gasket on item 14-1). The LUBRICATION SYSTEM and COOLING WATER SYSTEM sections show oil pump and water pump components with their seals and gaskets. If you are rebuilding a 3TNA72LUBA for a compact tractor or generator set, this catalog lets you order every gasket and O-ring without guessing. You get the OEM number – no cross-referencing required.

Source Validity – Why OEM Beats Reprints

I have been burned by aftermarket parts catalogs that list a “compatible” part that is 2mm off on the bolt hole spacing. This Yanmar catalog is the exact file the dealer uses. The OCR text on page 2 shows “119610-01340 GASKET, CYL. HEAD” and “119620-01342 GASKET, (NON-ASB.)” – two different gaskets for two different eras of production. A reprint service would mash those together. The factory file keeps them separate with engine serial number codes (E82943). If you want to cross-check with the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs or the Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM, those also come from the same OEM source. No shortcuts.

Order Parts Right – Even the Little Ones

Page 4 includes the “CAP, LUB.OIL SUPPLY” (124160-01751) – a tiny cap that costs $4 but can take three days to arrive if you order the wrong one. The diagram puts it in the gear housing cover. Without this catalog, you might assume a standard pipe plug fits. That assumption leads to a oil leak and a tow bill. For an overview of the broader Automotive Industry Overview you can read elsewhere, but for this engine you want the exact Yanmar file.

The manual is 34 pages. That is not a lot of paper, but every page is dense with part numbers and diagram callouts. You will not find procedure steps or torque specs here – that is what the service manual is for. The parts catalog is the companion you bring when you place the order.

Does the Yanmar 3TNA72LUBA Parts Catalog include torque specifications?

No. This catalog lists part numbers only. You need the Yanmar service manual for torque values.

How do I identify the correct cylinder head gasket if my engine has a serial number not in the table?

Check page 2 of the catalog. Item 14 is the standard gasket (119610-01340), and item 14-1 is the non-asbestos version (119620-01342) with a note column indicating it applies to engines with serial number E82943. If your engine falls outside that range, you may need to contact Yanmar with the full model and serial. The catalog gives you the part numbers to cross-reference with the engine tag. For other Yanmar models, see the Automotive Industry Overview for general guidelines, but always verify with the OEM catalog.

If you are ordering parts for a 3TNA72LUBA, do not risk a misorder. Access the Factory Manual and get the right part numbers on your bench before you call the dealer.