Yanmar TB128FR 1997 Parts Catalog – OEM Exploded Diagrams

Description

If you’re working on a Yanmar TB128FR and you’re not staring at the factory parts catalog, you’re burning time and money. I’ve seen too many guys order the wrong piston or gasket because they guessed from a third-party diagram. The Yanmar TB128FR 1997 Parts Catalog is 42 pages of OEM part numbers, exploded views, and compatibility codes. It’s not a repair manual—it’s the parts bible for this machine.

Cylinder Block, Crankshaft & Piston – What’s Inside

Section 1 of this catalog (CYLINDER BLOCK) shows you every bolt, sleeve, and seal that goes into the lower end. You get the part numbers for the cylinder liner, the crankshaft assembly, and the piston rings. If you need to order a new block or a bearing set, you look here. The exploded diagram saves you from pulling the wrong part off the shelf.

Camshaft & Driving Gear: Two Sections You Can’t Mix Up

The catalog splits the camshaft and its gear into separate sections: CAMSHAFT & DRIVING GEAR and GEAR HOUSING. That matters because the camshaft gear on the TB128FR can have multiple timing marks depending on the engine variant. The factory drawing shows the exact orientation and the part numbers for the gear, key, and thrust plate. Do not rely on aftermarket drawings for this—they’ll leave you chasing a timing offset.

How the Fuel Injection Pump Section Saves You from Ordering Wrong Parts

Turn to the FUEL INJECTION PUMP section (fig. 29 in the catalog) and you’ll see the boost compensator versions. The catalog lists separate part numbers for the 4JH-01, 4JH-DT, and 4JH-DTZ pumps. If you have an engine with E/# below 00155, you need a different pump than the later units. The table includes reference numbers like 725950-5190 and 26022-000162—use these when calling your dealer. A quick check here saves you a week of waiting on the wrong fuel pump.

7 Systems Covered – From Lubrication to Starting Motor

This parts catalog breaks down the TB128FR into 7 major systems: LUB.OIL SYSTEM, COOLING WATER SYSTEM, FUEL INJECTION PUMP, GOVERNOR, FUEL INJECTION VALVE, FUEL FILTER, and STARTING MOTOR. Each section has its own exploded view with a numerical index at the back (page 37–42). If you’re rebuilding the cooling system, the COOLING WATER SYSTEM section lists the water pump, thermostat, gaskets, and hoses by OEM number. No guesswork.

Get the Right Gasket Set – Section 17 in the Numerical Index

The GASKET SET section (section 17 in the index) is a lifesaver for any overhaul. It lists every gasket, O-ring, and seal for the cylinder head, oil pan, and timing cover. The catalog includes compatibility codes (N, Q, R, S) that tell you whether a new part can replace an old one. I’ve had techs call me about a leaking valve cover—turns out they used an RN-coded gasket on a later head casting. This catalog prevents that.

Who Needs This Catalog: DIYers and Shop Owners Alike

If you own a Yanmar TB128FR in your home garage or you run a six-bay shop like mine, you need OEM part numbers. DIY guys waste hours cross-referencing aftermarket sites that don’t list supersessions. Shop owners lose margin when a parts runner brings back the wrong valve or camshaft. This 42-page PDF gives you the same info the Yanmar dealer uses. Print the page you need, tape it to your bench, and order the exact part.

Why OEM Factory Specs Matter More Than Reprints

You’ll find plenty of reprint catalogs online that claim to cover the TB128FR. They don’t include the compatibility tables, the boost compensator options, or the Japanese notes about special-order parts. This is a genuine Yanmar publication from 1997, scanned from the original. The numerical index at the back lets you find any part number in seconds. For a deeper look at the construction equipment market, check out the Automotive Industry Overview and Automotive Industry Overview for context on why OEM parts traceability matters.

Does this parts catalog include torque specs?

No. This is a parts catalog, not a service manual. It gives part numbers, exploded views, and compatibility codes.

Which engine models are covered in the fuel pump section?

The FUEL INJECTION PUMP section lists the 4JH-01, 4JH-01E, 4JH-DT, 4JH-DTY, and 4JH-DTZ. Each has separate part numbers and application notes for the boost compensator.

How do I find the correct crankshaft part number?

Look in the CRANKSHAFT & PISTON section. The exploded diagram includes the crankshaft assembly and individual bearing shells. Use the numerical index at the back to confirm the part number listed in the table.

Can I use this catalog to order parts for a Yanmar B12 or B17?

No. This catalog covers only the TB128FR. For related models, see the Ammann Yanmar B12 B17 Parts Catalog or the Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs. The Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM also covers larger engines.

Forty-two pages of factory-accurate part numbers, compatibility codes, and exploded diagrams. If you’re pulling the cylinder head or ordering a camshaft for the TB128FR, this catalog is the difference between a job that finishes in one trip to the parts counter and three. Access the Factory Manual now and keep it on your tablet or print it for the bench.