Yanmar B22, B22-P Parts Catalog – Factory Documentation You Can Trust

You’re rebuilding a Yanmar B22 or B22-P crawler backhoe and you need the right part number for that hydraulic hose bracket. Or you’re chasing a wiring short on a B22 that someone already hacked into. The aftermarket catalogs give you a drawing that looks close but the bolt pattern is off by 5 mm. Waste of your bench time. This original OEM Yanmar Parts Catalog – 117 pages of factory-sourced data – is what you put on the table when you want the actual spec.

Preface History: Knowing Which Edition You’ve Got

The preface tracks three editions: 1st for Ammann model (pub. Sep. 1989), 1st for England/Australia (Oct. 1990), and 2nd for Europe (July 1991). If you’re working on a European-spec B22 or B22-P, you’re looking at the 2nd edition. That matters because Yanmar revised part numbers and figure references. The manual tells you exactly which country code applies – UK for United Kingdom, AY for Ammann, EP for All Europe. You don’t guess; you look up the figure, check the country column. Page 2 explains the notation with circles and dashes. Sloppy reading costs you fifty bucks on a wrong part.

Specifications: What the Machine Actually Weighs and Digs

You need the transport length? 4015 mm. Max digging depth? 2350 mm (2500 with blade). Travel speed 2.1 km/h. That’s page 3. The spec table lists B22-P[R] and B22[R] side by side – engine model 3TN75L-RB, vertical 3-cylinder water-cooled diesel. Machine mass for B22-P is 2100 kg (rubber crawler weight in brackets). Standard bucket capacity 0.06 m³. This isn’t marketing fluff. You use these numbers to size replacement cylinders and order the correct bucket teeth. The manual also gives average ground pressure in kgf/cm² – 0.278 for steel, 0.263 for rubber. That tells you if the undercarriage parts are interchangeable. They aren’t always.

Wiring Diagram: Why You Need the Factory Version

The table of contents lists WIRING DIAGRAM right after PARTS NAME. That’s a complete schematic – not a generic “typical” drawing. On the B22 and B22-P, the harness routing changes depending on whether you have the Ammann or Europe configuration. The wiring section includes the color codes and connector locations. One mistake: a DIY guy hooks up the alternator sense wire to the wrong terminal and fries the voltage regulator. The factory diagram prevents that. You trace the circuit, find the splice, and solder it right.

Parts Name Index: How It Saves You Time

The PARTS NAME chapter breaks down every system: rope controls (Fig. 29), engine and radiator (Fig. 8), fuel tank and fuel line (Fig. 9), bonnet (Fig. 27), air cleaner and silencer (Fig. 6). Each figure references the part number and the country applicability. If your B22 has a bonnet that doesn’t match the Ammann version, the catalog flags it. You can order the correct latch bracket without pulling the assembly off and comparing bolt holes. That’s the difference between a 20-minute lookup and a half-day tear-down.

117 Pages of OEM Documentation — Not a Chilton Reprint

This catalog came from the Yanmar factory print. The paint codes are listed – YANMAR Saffron Yellow (Munsell 1.0Y7.5/11, paint code 933110-91603), Cream White, Charcoal Gray. That’s on page 1. Aftermarket manuals don’t give you Munsell numbers. When you respray a fender, you need the exact shade. The catalog also includes the mounted engine spec: Model 3TN75L-RBVM(019830A). That engine serial number range tells you which service bulletins apply. If you rely on a generic parts list, you’ll order the wrong thermostat gasket because the later engines used a different housing. This catalog eliminates that.

FAQ

Does this Parts Catalog include repair procedures?

No. This is a parts catalog – diagrams and part numbers – not a service manual. You get the exploded views, wiring schematic, and spec tables. Torque specs and disassembly steps are in the Yanmar service manual. Those are separate documents.

What does the wiring diagram cover?

The WIRING DIAGRAM section covers the complete electrical system for the B22 and B22-P crawler backhoe. It includes the alternator, starter, battery, safety switches, and the wiring harness routing for European, Ammann, and UK configurations. Colors and connector pinouts are factory-coded. You cannot get this level of detail from an aftermarket source. The diagram on page [DATA NEEDED] shows the main harness splice points. Use it to diagnose a no-crank condition without backprobing the wrong wire.

You’ve seen enough jobs go sideways because someone ordered a part from a photo that looked right. With this Yanmar B22, B22-P Parts Catalog, you pull the figure, read the country code, and confirm the part number against the factory revision. No more returns. No more wiring fires. Download the Factory Manual and keep it on the bench next to your torque wrench.

Related manuals you might need:

• YANMAR B22 Crawler Backhoe Parts Catalog 1990
• Ammann Yanmar B12 B17 Parts Catalog
• Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs

External reference: Automotive Industry Overview for context on OEM vs. aftermarket documentation.