Yanmar TB25FR 1997 Parts Catalog – OEM Exploded Views & Part Numbers

Description

You’d think ordering a parts catalog would be straightforward. But if you’re hunting for a main bearing or a camshaft for a Yanmar TB25FR 1997 Parts Catalog with the 3TNE78A-TBY engine, you need the factory numbers. I’ve seen guys order three different “right” parts because they used aftermarket catalogs. This 25-page 1997 Yanmar TB25FR Parts Catalog gives you the OEM part numbers, exploded views, and quantities. No guesswork.

Cylinder Block and Main Bearings: Exploded View on Page 1

Page 1 shows Fig. 1 – Cylinder Block. You get the cylinder block assembly (part 118W10-00190), plugs in PT1/4 and M6 sizes, main bearings with thickness variations (standard, 0.25 under, 0.25 over), cylinder head bolts (14 of them, M10 x 90), and thrust bearings. If you need the main bearing part numbers for a 0.25 oversized crank, this page has them. The catalog even notes “OVER SIZED (O.S.=0.25) PART” so you don’t mix up standard and undersized bearings.

Gear Housing and Oil Pump: Factory Specs on Page 2

Fig. 2 covers the gear housing. You’ll find the gear housing flange, stud bolts, oil pump assembly (part 121650-03100), oil filter, O-rings, and a full list of bolts – M6 x 22, M8 x 12, M8 x 16, M8 x 28, M8 x 45, M8 x 55, M8 x 65. Each bolt has a specific plated finish. The catalog also lists the liquid gasket (part 97776-1201F) for sealing the gear housing. If you’re rebuilding the front of this engine, this page is your checklist.

Does the Catalog Cover the Camshaft and Crankshaft?

Section 7 covers the camshaft and driving gear. Section 8 covers the crankshaft and piston. The crankshaft section includes piston part numbers, rings, and wrist pins. The camshaft driving gear includes the timing gear and bolts. You won’t find torque specs here – this is a parts catalog, not a service manual – but you will find every fastener, seal, and component you need to order. For example, the camshaft driving gear assembly part number is listed under Fig. 7 in the PDF bookmarks. I’ve used this catalog to order a replacement camshaft gear for a TB25FR and it matched the factory original exactly.

7 Major Engine Systems Detailed

The catalog breaks down the 3TNE78A-TBY engine into 18 sections. Here are the ones that matter most: Cylinder block, Gear housing, Flywheel housing & oil sump, Cylinder head & bonnet, Camshaft & driving gear, Crankshaft & piston, Hydraulic pump, Lubrication oil system, Cooling water system, Fuel injection pump, Governor, Fuel injection valve, Fuel line, Starter motor, Generator, and Gasket set. Each section has an exploded diagram with reference numbers, part numbers, descriptions, and quantities. The cooling water system (section 11) and fuel injection valve (section 14) are particularly useful if you’re chasing a coolant leak or a bad injector. The valve section lists the injector body, nozzle, and shims – everything you need to rebuild a leaking injector.

Why OEM Documentation Beats Aftermarket Copies

I’ve worked with aftermarket parts catalogs that claimed to cover the Yanmar TB25FR. They either had wrong part numbers or missing illustrations. This is an original OEM publication, printed December 11, 1997, under Yanmar document number Y00D0460. The part numbers start with Yanmar prefixes like 118W10, 124N40, 121650 – the genuine factory codes. When you call your parts supplier with one of these numbers, they’ll know exactly what you need. No cross-referencing, no returns. The Ammann Yanmar B12 B17 1991 Parts Catalog – OEM Factory Specs follows the same format, as do the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs and Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM. For general background on automotive industry standards, see the Automotive Industry Overview. Automotive Industry Overview also covers manufacturing consistency.

Fuel System and Cooling: Two Common Failure Points

Section 12 (Fuel injection pump) and section 11 (Cooling water system) are worth special attention. The fuel injection pump assembly part number is listed with its drive gear and mounting bolts. The cooling water system shows the water pump, thermostat housing, and hoses. If you’re replacing a water pump on a TB25FR, you need the correct gasket – the catalog lists it under the gasket set (section 18). Don’t waste time hunting for a cross-reference; get the factory number straight from these pages.

FAQ – Yanmar TB25FR Parts Catalog

Does this parts catalog include torque specifications?

No. This is a parts catalog, not a service manual.

What engine does this catalog cover?

This catalog covers the Yanmar TB25FR equipped with the 3TNE78A-TBY diesel engine. It includes part numbers for cylinder block, gear housing, flywheel housing, cylinder head, manifolds, camshaft driving gear, crankshaft and piston, hydraulic pump, lubrication system, cooling system, fuel injection pump, governor, fuel injection valve, fuel line, starter motor, generator, and gasket set.

How many pages and what year?

25 pages, published 1997.

Is the catalog in English?

The catalog is bilingual English and Japanese. Part numbers are universal. Descriptions are in both languages. The exploded diagrams use reference numbers keyed to the parts list. If you read English, you’ll find the part names and numbers clearly.

You need factory part numbers to keep that Yanmar TB25FR running. This 25-page OEM catalog gives you the exact numbers for every engine component – from the cylinder block down to the gasket set. Access the Factory Manual now and order with certainty.