All 148 pages of this Yanmar B12-2B, B17-2B Parts Catalog (OEM #Y00K3442) are built around one job: putting the exact factory part number in your hand before you ever pick up the phone or hit a supplier's website. Inside, a full Picturesque Index maps every major assembly visually (cab, canopy, boom, drivetrain, chassis, and attachments) so you can identify a component by sight and pull its part number without guessing. You also get electrical wiring diagrams for the complete Crawler Backhoe electrical system, plus Yanmar's official paint part number list covering Peacock Green, Citrus Green, and Dark Olive Gray codes for boom, arm, fuel tank, and canopy. These are factory-sourced numbers straight from Yanmar's OEM catalog, not catalog transcriptions or aftermarket cross-references. No more back-and-forth with the parts counter. Bookmarked by assembly and keyword-searchable, so you pull it up on any device, find your section, and order the right part the first time.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Yanmar B12-2B / B17-2B Crawler Backhoe | ||
| Parts Catalog | ||
| 148 | ||
| Y00K3442 | ||
| 172137-72463 | ||
| 172183-73930 |
Yanmar B12-2B, B17-2B Common Problems This Manual Covers
Yanmar B12-2B or B17-2B final drive seal kit part number needed, track stopped moving on one side
Check the Drivetrain Parts Diagram. Locate the final drive assembly in the exploded view and cross-reference item numbers against the adjacent parts list. The seal kit is listed as a sub-assembly under the final drive unit. Verify your serial number range before ordering, as B12-2B and B17-2B use different final drive configurations.
Manual Section: Drivetrain Parts DiagramBoom cylinder piston seal part number unclear, multiple seal types shown in the assembly diagram
Turn to the Boom & Attachment Parts Diagram. Find the boom cylinder exploded view and identify the piston seal by its item number in the callout. The parts list alongside the diagram cross-references each item number to a part number. Confirm whether you need the inner piston seal or the rod wiper seal, as these carry separate part numbers.
Manual Section: Boom & Attachment Parts DiagramRadiator cooling fan assembly part number needed, engine overheating after debris packs the fan shroud
Refer to the Chassis Parts Diagram. The cooling fan and shroud assembly appear in the exploded view with individual item callouts. Note the fan blade count before ordering; a wrong-pitch blade won't restore adequate airflow. Check the parts list for both the fan assembly and mounting hardware, as brackets often need replacement alongside the fan.
Manual Section: Chassis Parts DiagramTrack roller bearing part number uncertain, several roller positions listed but parts look interchangeable in diagram
Open the Drivetrain Parts Diagram. Each roller position (front idler, carrier roller, bottom roller) has its own exploded view callout and separate part number. Count the roller positions on your machine and match them to the diagram index. Bottom rollers and carrier rollers typically carry different bearing part numbers even if the housings look identical.
Manual Section: Drivetrain Parts DiagramHydraulic pump gasket part number needed, schematic shows multiple gaskets without clear identification
Check the Hydraulic Section overview. The schematic identifies the pump assembly by component reference. Cross-reference the pump reference number against the parts index to find the gasket sub-assembly listing. If the manual lists a complete pump gasket set as a single kit item, order the kit rather than individual gaskets to ensure all mating surfaces are covered.
Manual Section: Hydraulic Section OverviewCorrect touch-up paint part number unclear, B17-2B Asian-spec color differs from Japan and export versions p. 4
Check page 3 for B12-2B and B17-2B Japan and export color codes, or page 5 specifically for B17-2B Asian-spec colors. Cross-reference on page 4, which lists paint part numbers for each named color alongside specific machine components: boom, arm, canopy, blade. Match your machine's region spec before ordering, as Asian-spec and JP/Ex-spec colors are not interchangeable.
Manual Section: Paint Part No,&Color of Main PartsFrequently Asked Questions
What is the part number for the Boom Cylinder Piston Seal Set on the Yanmar B12-2B / B17-2B?
The Boom Cylinder Piston Seal Set part number is 172137-72463, as listed in the parts catalog (PICTURESQUE INDEX, FIGURE 25-36).
What is the part number for the Final Drive Seal Kit on the Yanmar B12-2B / B17-2B?
The Final Drive (Travel Motor) Seal Kit part number is 172183-73930. It is listed in the parts catalog under SEAL KIT, TRAV.MOTOR.
Does the Yanmar B12-2B / B17-2B Parts Catalog include hydraulic system component diagrams?
Yes. The catalog includes illustrated parts breakdowns for hydraulic components including the boom cylinder, hydraulic pump, and travel motor assemblies with associated seal kits and gaskets.
Does this parts catalog cover both the B12-2B and B17-2B models, and are electrical system parts included?
Yes. This is a combined parts catalog (OEM #Y00K3442) covering both the B12-2B and B17-2B crawler backhoe models. It includes illustrated parts listings for the electrical system and wiring harness components for both variants.
Document Quality
This document is a scanned PDF, and you can search the full text thanks to an OCR layer. The text quality is generally crisp and easy to read throughout the document. Diagrams and illustrations are raster images, but they are clear, and all labels are readable. Pages are clean with no noticeable scan artifacts, stains, or skewed content. There are no notable blank or filler pages.
Reviews
There are no reviews yet.