Part of the Yanmar Parts Manuals.
Need the factory part numbers for your 1987-1990 Yanmar crawler backhoe? This 161-page Yanmar B22 Parts Catalog (OEM #000Y00K2282) covers the complete model family: YB221U, YB221UZ, B22, B22-1, and all P, C, and Z variants. You get exploded-view diagrams across every major system: engine, chassis, cab, hydraulic assemblies, and boom components, each tied to OEM part numbers so your order lands right the first time. Wiring coverage is split by configuration, with separate diagrams for canopy-spec and cabin-spec machines that identify the battery, fuel system, accelerator linkage, and air cleaner as individual replaceable assemblies. For a machine pushing 35 years, the right part number is the only thing standing between you and two weeks waiting on the wrong seal. Bookmarked by section; jump to hydraulics, boom parts, or engine components by keyword and place your order.
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What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface | 1 | YB221U, YB221UZ, B22, B22-1 Model Variants, Part Catalog History, Model Name Index |
| Specifications | 2 | Engine Type, Transport Dimensions, Bucket Capacity, Working Range, Performance Data, Machine Mass |
| Table of Painted Color | 3-4 | Painted Color List, Canopy Color, Cabin Color |
| Pictorial Index | 5-12 | Main Parts Overview, Hydraulic Section Index, Figure Index, Assembly Layout |
| Wiring Diagram | 13-15 | Electrical Schematic, Wiring Harness Routing, Circuit Overview |
| Body & Engine Parts | 16-39 | Label Sets (canopy/cabin), Tools, Air Cleaner, Silencer, Accelerator, Engine Mount, Radiator, Fuel Tank, Fuel Pipe, Battery, Electric Parts, Work Lamp |
| Undercarriage | 38-55 | Track Roller (previous/new), Track Frame, Idler, Crawler 270mm, Link Stand |
| Control Equipment & Frame | 54-75 | Control Levers, Control Links, Multi-Link Spec, Control Rods, Turning Frame, Turning Driving Gears, Bonnet, Seat, Step, Canopy, Cabin |
| Hydraulic System | 77-120 | Boom Cylinder, Arm Cylinder, Bucket Cylinder, Swing Cylinder, Blade Cylinder, Hydraulic Oil Pump, Turning Motor, Travel Motor, Swivel Joint, Control Valves (travel/turning/arm/bucket/swing/boom/blade), Hydraulic Oil Tank, Greasing, Hydraulic Oil Piping |
| Boom, Arm & Attachments | 121-128 | Boom Assembly, Boom Bracket, Arm, Bucket Link, Bucket, Blade |
| Optional & Attachment Parts | 129-155 | Cigar Lighter, Manual Case, Heater, Defroster, Radio, Crawler 320/350 Optional, 3rd Valve Control, 3rd Valve Piping, D-Pattern Link, Blade 850 Attachment, Bucket Attachments, Bucket S-Type |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
