Description

Yanmar 3TNE82A Technical Manual – 34 Pages of Factory Parts Data

I’ve seen techs waste a full day chasing the wrong main bearing because they used an aftermarket parts list. On a Yanmar 3TNE82A, the difference between a standard bearing and a 0.25 oversize is one digit in the part number. This Technical Manual gives you the factory breakdown — not a generic summary. 34 pages, printed from the OEM database. No guesswork.

Cylinder Block Assembly – Page 2

Page 2 lays out the block assembly with every bolt, plug, and bearing. You get part numbers for the 14 cylinder head bolts (119810-01200), the main bearings in standard and 0.25 oversize (119810-02870), and the thrust bearings with the same oversize option (119810-02940). If you’re rebuilding this engine, you need those numbers to order the right parts. The manual also shows the camshaft bush (129795-02411) and the head gasket (119812-01330). No second-guessing which plug goes where — it lists PT1/4 plugs and hex plugs with quantities.

Gear Housing Assembly – Page 4

Move to page 4 and you get the gear housing breakdown. Housing assembly part number 719810-01500, oil seal 129795-01800, studs, bolts in various lengths from M8x12 to M8x85 plated. Note the seal washer (22190-080002) used both on the gear housing cover and the blind cover. The manual also includes O-ring sizes for the fuel injection pump (1A P-16.0 and 1A P-32.0). If you’re resealing a housing, you’ve got the exact O-ring part numbers so you don’t grab a mismatched size from a kit.

3 Reasons to Use OEM Parts Data

First, aftermarket catalogs often combine multiple engine variants into one list. The 3TNE82A has specific bolt lengths and bearing grades that won’t match a generic Yanmar parts sheet. Second, the exploded views show assembly order — which bolt goes through which hole, where the knock pipe (129795-01950) fits. Third, you get supersession info. Look at the M8x85 bolt: two different part numbers listed (26106-080852 and 129001-91840) with a note that one supersedes the other after engine serial number E/#43673. That kind of detail keeps you from ordering obsolete parts.

Does This Manual Cover the Fuel System?

It covers the injection pump mounting and O-rings, but not internal pump calibration. For that you’d need the Yanmar injection pump service manual. What you do get is the O-ring for the F.I. pump (121850-51960) and the pipe (171031-11741) that connects it. If you’re pulling the gear housing, you’ll see exactly how the pump mounts and what seals are needed. Pair this manual with the Yanmar 3TNE82A, TB28FR, ETBZ 1997 Parts Catalog – OEM Factory for complete part numbers across multiple models.

Part Number Interpretation – What the Codes Mean

Yanmar uses a 12-digit part number system. For example, 119810-01200 is a cylinder head bolt. The dash suffix —01200 — indicates the specific variant. When you see 119810-02870 (main bearing US=0.25), that “US” means undersize. The manual flags these with a column that says “1” for standard, “2” for oversize. If you’re ordering bearings, cross-reference the block stamping with the manual’s table. Don’t rely on memory; I’ve seen guys install standard bearings in a block that needed 0.25 OS and then wonder why the crank seized.

Understand the Assembly Sequence

The exploded diagrams on pages 2 and 4 show the relationship between parts. For instance, the cylinder block diagram (Fig. 1) references other figures for additional components like the oil pan or front cover. The gear housing diagram shows 28-1 as a bolt that may not exist on earlier engines (note “EXXX” suffix). That tells you to verify engine serial number before ordering. Follow the manual’s structure: start with the block, then the housing, then oil seals, then bolting sequence. If you’re doing a full rebuild, also grab the Ammann Yanmar B15-37, B17-3, B18 Technical Manual – OEM Factory Specs for shared Yanmar platform specs.

Torque Specs – Where to Find Them

This manual focuses on part numbers, not torque values. But the OEM torque specs for the 3TNE82A are published in the service manual. You can find those in the Yanmar 2TE67L-BV, SV08-1 Technical Manual – 58-Page Factory Spec Guide which covers similar engine families. On the workbench, I keep both the parts manual and the service manual open. Parts manual tells me what bolt to order, service manual tells me how tight to run it.

FAQ

Can I use this manual to diagnose an engine that won’t start?

No. This is a parts identification manual, not a diagnostic guide. It does not include fuel timing specs, compression values, or wiring diagrams. For no-start, get the Yanmar service manual.

Are the part numbers in this manual still current?

This manual reflects the parts list as of the original publication. Yanmar may have superseded some numbers. Always check with your dealer using the part numbers listed. The manual notes a few supersessions (e.g., bolt 129001-91840 replaces 26106-080852 after a certain serial number). That level of detail is rare in aftermarket prints.

If you’re rebuilding a 3TNE82A or just need to order the right seals, bearings, and bolts, this 34-page technical manual puts the OEM parts library on your screen. No reprints, no copies — original factory document. Access the Factory Manual from AutoRepairManuals and keep one copy in your shop tablet and one on your phone. When the parts counter says “Which bearing?”, you’ll have the answer on page 2.

For broader Yanmar technical knowledge, see this Manual Transmission article for understanding how engine power is transmitted, and cross-reference with Manual Transmission design principles if you’re working on a machine with a manual gearbox.