Description

Yanmar B50-2B, B50-2B C, B50-2B P 2000 Parts Catalog – OEM Factory Specs

If you’re stuck trying to order parts for a Yanmar B50-2B series crawler backhoe and keep getting the wrong pieces, I know the reason. Most aftermarket catalogs group all variants together – cabin, canopy, rubber track, iron track – and you end up with a part that doesn’t fit. This 245-page Parts Catalog is the 2nd revised edition from 2000. It covers Japan and overseas except Europe and the USA. You get the exact Yanmar part numbers, painted color codes, and illustrated breakdowns. Page 1 of the preface shows the model breakdown: B50-2B C (cabin), B50-2B P (canopy), and regional specs like AS for Australia. I’ve watched jobs stall because someone assumed a canopy hydraulic line matched a cabin machine. This manual ends that guesswork.

What This Catalog Covers – and What It Doesn’t

This is a Parts Catalog, not a service or repair manual. It does not contain torque specs, removal procedures, or troubleshooting. What it does contain: painted color lists for JP, EX, and AS regions, specification tables with dimensions and travel speeds, and a “Picturesque Index” that organizes every part into figures. The figures are numbered 01–12, 13–24, up to 97–107. Each figure shows a clear exploded drawing with callouts. You use those callouts to match the part number from the tables. If you need repair instructions, look for the separate service manual. But if you want the right hydraulic hose or seal the first time, this catalog is your only source.

Model Variants: B50-2B C, B50-2B P, and Regional Specs

Page 1 lists six vehicle model codes: B50-2B C (R) F, B50-2B C (R) S, B50-2B P (R) F, B50-2B P (R) S, plus two AS variants. The (R) means rubber crawler; F is front lever, S is side lever. The engine section covers 4TNE88-B1 and 4TNE88-EB1 with serial number ranges. Why does this matter? Because a canopy spec machine uses different ROPS structure, different floor plates, and different control linkages compared to the cabin spec. Ordering a cabin part for a canopy job wastes money and time. The catalog separates these by section and figure, so you can pinpoint exactly which variant you have before ordering.

Picturesque Index: How to Find Your Part

The catalog uses three levels of index. First, the PICTURESQUE INDEX (1) MAIN PARTS covers the main vehicle structure. Then (2) HYDRAULIC SECTION – all the hoses, pumps, valves. Finally (3) FIGURE 01-12 through FIGURE 97-107. Each figure is a detailed exploded line drawing with numbered callouts. For instance, if you need the swing boom cylinder seal, you’d look in the hydraulic section figures. The drawing shows every washer, O-ring, and port fitting. The part number table next to the figure gives the Yanmar part number, quantity, and any note. You don’t have to guess at dimensions – the catalog tells you the exact OEM part. I’ve used these catalogs for years; the figure numbers align with the actual machine layout, so you can walk around the backhoe and match what you see.

Specifications and Dimensions

Page 2 gives you the full specs: transport length (1950 mm), transport width (handled by track shoe width), transport height (2400–2490 mm depending on cabin/canopy). Standard bucket capacity 0.16 m³, max digging depth 3600 mm (3800 with blade). Max cutting height 5900 mm (5500 for canopy). Max dump height 4250 mm (3900 for canopy). Travel speed 4.8/2.3 km/h (5.0/2.5 for rubber track). These numbers matter when you’re ordering undercarriage parts or bucket teeth. The catalog also lists machine mass: 4150 kg for iron crawler cabin, 4300 kg for iron crawler canopy, etc. Having these on hand saves you from measuring everything twice. You can cross-check your machine serial number to confirm you have the right variant.

Painted Color Lists: JP, EX, AS Specs

Repainting a Yanmar backhoe to match factory finish? The catalog includes PAINTED COLOR LIST (JP, EX) and PAINTED COLOR LIST (AS) with Munsell numbers. For example, the main body uses Yanmar Peacock Green (Munsel 3.8B G5.3/9.15, color code 97). The canopy interior uses a different shade. This section also lists the exact part numbers for painted components. If you need to order a new hood or side panel that comes pre-painted, you can match the color code to the part number. Aftermarket paint jobs rarely match because they don’t have the correct Munsell reference. This catalog has it.

Source Validity: OEM Yanmar Documentation

Every page of this catalog comes directly from Yanmar’s factory archives. It’s not a scanned aftermarket compilation with guesswork part numbers. The preface states: “Be sure to use Yanmar Genuine Parts in your maintenance servicing of Yanmar products. Be careful not to use the simple parts available in the market; otherwise their use in repairing causes such as an early breakage.” That’s straight from Yanmar. Aftermarket catalogs often substitute “equivalent” parts that don’t match the hydraulic flow or mounting holes. I’ve seen it happen – a generic hose that looks correct but bursts at full pressure. This catalog eliminates that risk. You get the exact 000Y00K 3462 revision from July 2000, still valid for all B50-2B serial numbers listed. For background on why OEM documentation matters, see Automotive Industry Overview. The Automotive Industry Overview covers similar principles on why factory specs are non-negotiable.

FAQ – Yanmar B50-2B Parts Catalog

Does this catalog cover the engine parts separately?

Yes, the engine section (4TNE88-B1 and 4TNE88-EB1) is included with serial number ranges. You’ll find piston rings, gaskets, fuel injection parts, etc.

Can I rebuild the hydraulic pump using this catalog?

Only for part identification. The catalog shows exploded views of the hydraulic pump with part numbers for seals, plates, and shafts. For rebuild procedures you need the service manual.

What year is this catalog valid for?

2000. The 2nd revised edition of July 2000 supersedes the 1997 and 1998 editions. It covers machines built from 1997 onward with serial numbers listed on page 1.

Are the color numbers still available from Yanmar today?

Yes. Yanmar still supplies paint in those Munsell codes. The catalog gives both Japanese and English color descriptions, so any body shop can mix the correct shade.

If you’re working on a Yanmar B50-2B series backhoe and need the right part numbers, color codes, or specification data, this catalog is the only source you should trust. Related manuals: Yanmar B50-2B 1997 Parts Catalog covers the earlier edition. For other Yanmar models, see Ammann Yanmar B12 B17 Parts Catalog and Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs. Stop guessing which parts fit. Access the Factory Manual and get the OEM part numbers from the source.