Part of the Yanmar Parts Manuals.
Chasing a leak back through the hydraulic oil tank on a Yanmar B12-2B means knowing exactly which fitting, seal, and hose clamp sits where. The exploded figures in this Yanmar parts catalog (publication Y00K3442) lay that out for the B12-2B and B17-2B crawler backhoes, serial numbers 30501 and up, across 148 pages.
Every rebuild stalls at the same point: the dealer counter wants a part number, not a description of the broken piece in your hand. This catalog gives you that number, opening with a picturesque index of main parts and continuing into dedicated figures for the electric parts, canopy, hydraulic oil tank, tools, link stand, and labels. A specifications page and the factory painted color lists round out the book.
It is a standard PDF download, so print the figure you need and take that page to the bench, where it can get as dirty as the job.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Parts Index — Main Machine | Main parts, Canopy, Safety labels, Structural components | |
| Hydraulic System Parts | Boom cylinder, Piston seal 172137-72463, Hydraulic pump, Gasket sets | |
| Electrical / Wiring Parts | Electric parts, Wiring harness, Wiring schematics | |
| Crawler / Undercarriage Parts | Track assembly, Final drive, Travel motor, Seal kit 172183-73930 | |
| Boom, Arm & Bucket Parts | Boom assembly, Arm/dipper, Bucket, Pins and bushings |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Yanmar B12-2B / B17-2B Crawler Backhoe | ||
| Parts Catalog | ||
| 148 | ||
| Y00K3442 | ||
| 172137-72463 | ||
| 172183-73930 |
