Description

Ammann Yanmar B12, B17 1991 Parts Catalog

If you’re working on a B12 or B17 crawler backhoe and you don’t have the factory parts breakdown, you’re guessing. I’ve been turning wrenches for 28 years and I’ve seen enough wrong parts ordered because some guy used a generic parts list. This Ammann Yanmar B12, B17 1991 Parts Catalog is the real thing. 144 pages from the factory. It tells you the exact part codes, the local procurement numbers, and the paint codes. That’s it.

The preface explains how they organized it: fixed codes and variable codes for locally procured parts. That alone saves you from ordering a part that doesn’t fit. The specifications table (page 2) gives you dimensions in millimeters, bucket capacities, engine type — the 3TNA72L-U8A or U8B. You need that data to verify your machine.

What This Parts Catalog Actually Covers

The table of contents includes Preface, Specifications, Parts Name, and Wiring Diagram. The Parts Name section breaks down every major assembly with figure numbers. Engine mount? Fig.5. Fuel tank and filler cap? Fig.8. Hydraulic pump and joint? Fig.37. Each figure references the exact part code you need to order.

Specifications Page: Don’t Guess the Dimensions

Page 2 lists overall length at 3485 mm (about 137 inches), width 1000 mm (39 inches), height 2070 mm (81 inches). Bucket capacity for B12 is 0.04 m³ (roughly 1.4 ft³). Max digging depth 1900 mm (75 inches). Traveling speeds: 1.8 km/h for B12, 2.0 km/h for B17. Climbing ability 30 degrees. Operating weight between 1170 and 1350 kg. These numbers matter when you’re ordering undercarriage parts or checking lifting capacity.

3 Reasons to Use OEM Parts Documentation

First, factory part codes are cross-referenced across revisions — this is the 4th edition from 1991, so it supersedes earlier versions. Second, paint codes: YANMAR Saffron Yellow (Munsell 1.0Y7.5/11, paint code 933110-91603), Cream White, and Charcoal Gray with spray can numbers. Third, the wiring diagram is included, which is unusual for a parts catalog. That can save you hours tracing a short.

Is the Wiring Diagram Included?

Yes. The PDF bookmark lists WIRING DIAGRAM as a separate section. For a crawler backhoe, electrical issues often come from corroded connectors. Having the factory diagram means you can trace each circuit without chasing ghosts. Pair this with a Internal Combustion Engine manual for the 3TNA72L and you’ve got a complete setup.

How to Read the Local Procurement Codes

The preface describes a two-part code system: a fixed prefix (e.g., 172159) followed by a variable suffix (OOOOO). The fixed code identifies the part family; the variable distinguishes specific variants. If a part is locally procured, the code changes accordingly. Ignoring this will get you a part that looks right but doesn’t mount. There’s a history of revisions — 1st edition July 1989, 4th edition August 1991. This catalog replaces all older editions, so toss those.

The engine is a vertical 3-cylinder water-cooled diesel from Yanmar, a proven design. Paint codes follow the Munsell system, widely used in the Automotive Industry Overview.

Does this catalog include part numbers for the engine?

Yes, engine parts are listed in Fig.5.

Can I use this for a B17-PR model?

Yes, B17-PR is covered in the specs table.

What paint codes are provided?

Three paint colors are listed: YANMAR Saffron Yellow (Munsell 1.0Y7.5/11, paint code 933110-91603), YANMAR Cream White (5.0Y9/1, code 981101-09614), and YANMAR Charcoal Gray (N2, code 981101-09516). Spray codes are also given for each. If you’re restoring a machine or touching up a scratched panel, these codes ensure the color matches the factory finish. Ignoring paint codes leads to mismatched equipment that looks unprofessional.

How is the 144-page catalog organized?

It starts with a preface explaining the code system, then specifications, followed by a parts name section with figure numbers for each assembly. A wiring diagram is included at the end.

Don’t waste another afternoon matching bolts from a worn-out part. If you’re serious about getting the right parts for your Ammann Yanmar B12 or B17 backhoe, this is the document to have on your bench. Access the Factory Manual from AutoRepairManuals.com and stop guessing.

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