Description

Yanmar B25, B25-1, 3TNC80L-RB 1996 Parts Catalog

You ever get a box of parts that don’t line up with the holes on your machine? That’s the cost of trusting aftermarket catalogs. This – the Yanmar B25, B25-1, 3TNC80L-RB 1996 Parts Catalog – is the last edition Yanmar published for these crawler backhoes. It’s 150 pages of OEM part numbers, exploded diagrams, paint color codes, and specifications. Not a repair manual, but the only way to know exactly what Yanmar put on the machine when it left the factory. If you’re rebuilding a B25 or B25-1 with the 3TNC80L-RB engine, you need this catalog open on your bench, not a tablet with a generic parts lookup.

Specifications: Know Your Machine’s Limits

The specs section (page 2 of the PDF) lists transport dimensions, bucket capacities, digging depths, and machine mass. For the B25-C(R) canopy version, transport length is 4205 mm – about 165 inches – and max digging depth 2600 mm. The standard bucket capacity is 0.07 cubic meters. These numbers matter when you’re matching aftermarket buckets or ordering hydraulic hoses. The catalog also gives travel speed (2.3 km/h) and average ground pressure. Use this data to verify you’re ordering the right undercarriage parts. Don’t assume all B25s are the same – there are differences between cabin and canopy variants, and between rubber and steel crawlers.

Numbers don’t lie.

Painted Color List: Why You Should Care About Munsell Numbers

The painted color list section contains the three main colors: Yanmar Cream White (5.0Y9/1), Saffron Yellow (1.0Y7.5/11), and Charcoal Gray (N2.0). Each has a Munsell number and a spray can part number. If you’re restoring a B25 for a customer who wants it looking original, you don’t eyeball the paint – you buy the exact spray can listed here. The catalog even says which paint to use on which part. That’s detail you won’t find in a generic parts book. I’ve seen too many machines painted with the wrong yellow and it ruins the resale value.

7 Systems Covered in the Picturesque Index

The manual breaks down into three picturesque indexes. Index 1 covers main parts. Index 2 is the hydraulic section – where most breakdowns happen. Index 3 contains figures 01 through 65, split into groups. Each exploded diagram shows individual components with call-out numbers. You look up the number, cross-reference to the part list, and order exactly that part. No guesswork. The figures are organized logically: engine, undercarriage, bucket, boom, swing mechanism, etc. Figures 01-12 cover the engine and cooling system, 13-24 the undercarriage, 25-36 the boom and arm, 37-48 the control valves, 49-60 the hydraulic pump and swing motor, and 61-65 the electrical system. The hydraulic section alone is worth the price if you’re trying to identify a leaky seal or a worn spool. If you need earlier models, check the Ammann Yanmar B12 B17 Parts Catalog for the B12 and B17.

3 Reasons OEM Parts Are Not Optional

First, aftermarket seals and bearings fail faster – the catalog warns about ‘simple parts available in the market causing early breakage.’ Second, the part numbers in this catalog are verified by Yanmar. Third, when you order using the correct number, you get the right fit. On a machine like the B25-1 with serial numbers 10501-10914, using a wrong part can cause cascading failures. I have seen a misidentified hydraulic fitting lead to a $2,000 pump rebuild. Don’t risk it. Related catalogs: Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs and Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM.

Preface: What This Catalog Is (And Isn’t)

The preface states clearly: this is a parts catalog, not a technical data manual with servicing procedures. The illustrations are simplified for part identification only. That means if you need torque specs for the 3TNC80L-RB engine head bolts, this isn’t your document. But if you need to know the part number for the injector line or the right o-ring for the control valve, this is it. Always pair it with a proper service manual for removal and installation steps. Understanding the Automotive Industry Overview helps when sourcing parts, but this catalog cuts through the noise. For more context on Yanmar’s history, see Automotive Industry Overview.

FAQ

Is this a service manual with repair procedures?

No. It is strictly a parts catalog, not a repair manual.

Which engine does this catalog cover?

The 3TNC80L-RB diesel engine, used in the B25 and B25-1 models.

Can I use this to find aftermarket part numbers?

You can, but the catalog warns against it. On the preface page, Yanmar specifically says “Be careful not to use the simple parts available in the market; otherwise their use in repairing causes such as an early breakage, for instance.” That means aftermarket seals, bearings, and filters may not meet the factory specs. This catalog gives you the genuine Yanmar part numbers. If you insist on aftermarket, you’ll need to cross-reference the OEM number yourself. But I’ve seen enough failures to recommend ordering Yanmar Genuine Parts wherever possible.

How many pages and what year is this catalog?

150 pages, published in 1996 as the last edition. It replaces the 1990 first edition.

Stop guessing parts. Access the Factory Manual today and keep your B25 running right.