All 129 pages of this Yanmar Crawler Backhoe Parts Catalog (OEM #000Y00S3000) focus on one thing: finding the exact part number you need for your B12, B17, B12-P, B12-PR, B17-P, or B17-PR machine. Inside, you get exploded views and itemized parts lists spanning every major assembly: engine mount and radiator, fuel tank and fuel line, hydraulic oil pump and joint, control valve, swivel joint, turning motor, travel motor, and the full crawler undercarriage including track frame, idler, and sprockets. Wiring diagrams cover harnesses, fuses, lamps, meters, and switch assemblies so you can cross-reference electrical components without guessing. Boom swing angle is specified at 45 degrees left and 90 degrees right. Your machine is down, and the dealer wants three days to look up a part number. Grab this catalog, search by keyword, pull up the exploded view, and have the right Yanmar part number ordered before lunch. Bookmarked by system, fully searchable on any device.
What's Inside This Yanmar B12-B17 Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Electric Parts | - | Harness, Fuse, Lamp, Buzzer, Meter, Switch Assy |
| Inlet Hose & Exhaust Pipe | - | Extension Silencer, Clamp, Bolt, Nut, Pipe Air, Hose |
| Engine Mount & Radiator | - | Engine Bed, Absorber Shock, Mount Radiator, Hose Water Drain, Radiator, Sub Reservoir Assy |
| Fuel Tank & Fuel Line | - | Fuel Tank Assy, Gauge Fuel, Strainer Fuel Inlet, Cock, Hose, Separator Water |
| Bonnet | - | Step, Mat Floor, Cover Support, Mount Seat, Lever Seat Lock, Seat |
| Hyd. Oil Pump & Joint | - | Mount Pump, Joint Pump, Pump Assy Hyd Oil, Pump Assy Center, Coupling Spline, Seal Set |
| Hyd. Oil Tank | - | Reservoir Assy, Filter Suction, Rod Strainer, Valve Assy Bypass, Gauge Oil Level, Plug Oil Feed |
| Arm Cylinder | - | Cylinder Assy Bucket, Piston, Seal Set, Nipple, Tube W/BUSH, Rod Assy |
| Work Lamp | - | - |
| Swing Cylinder | - | - |
| Greasing | - | - |
| Boom Cylinder | - | - |
| Accelerator | - | - |
| Blade Cylinder | - | - |
| Blade | - | - |
| Bucket Cylinder | - | - |
| Turning Frame | - | Bearing, Turning, Seal Set, Seal, Upper, Lower, Parallel Pin |
| Turning Driving Gears | - | Motor Assy, Turning, Reduction Gear Assy, Seal Kit, Reduction, Gear, Sun, Bearing |
| Turning Motor | - | Motor Assy, Drive, Reduction Gear Assy, Seal Kit, Reduction, Gear, Sun, Housing |
| Swivel Joint | - | Assy, Liner, O-Ring, Shaft, Swivel, Hub, Flange |
| Battery | - | - |
| Heater | - | - |
| Track Roller | - | - |
| Track Frame & Idler | - | - |
| Crawler | - | Track Roller, Track Frame & Idler, Assy, Rubber Crawler, Sprocket, Idler Assy |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Boom swing angle | (Left) 45 (Right) 90 | p. 2 |
Yanmar B12-B17 Series Common Problems This Manual Covers
Yanmar B12 bucket cylinder seal kit part number unclear, multiple Seal Set entries listed in hydraulic section
Open the Hydraulic Parts Diagram and locate the Bucket Cylinder assembly in the exploded view. The catalog itemizes Seal Set, Piston, and Rod Assy as separate line items, each with its own part number. Pull the Seal Set entry, then verify against Parts Number List. Check bore dimensions in the Technical Specifications on page 2 before ordering; seal sets differ across model variants.
Manual Section: Bucket CylinderMachine decal missing or faded, can't confirm model variant before pulling parts
Start with the Model Compatibility Chart. It maps all 8 variants (B12, B17, B12-P, B12-PR, B17-P, B17-PR, 3TNA72L-UBA, 3TNA72L-UBB) to their serial number ranges. Locate your machine's serial plate on the lower frame, match the number to the chart, and lock in your exact variant before pulling any part number from this catalog. Wrong sub-model is the most common cause of incorrect orders.
Manual Section: Model Compatibility ChartTrack roller, idler, or sprocket part number needed after undercarriage inspection, worn components hard to identify
Open the Chassis Parts Diagram. Crawler sub-assemblies include Track Roller, Track Frame & Idler, Rubber Crawler, Sprocket, and Idler Assy, each broken out as a separate exploded view. Find your worn component, note the item number, and pull the matching part number. Confirm your model variant before ordering; B12 and B17 series use different undercarriage components.
Manual Section: CrawlerWiring harness connector or fuse part number missing after electrical fault, damaged component unidentified
Check the Wiring Diagram to trace the affected circuit and locate the harness segment or fuse. Electric Parts lists Harness, Fuse, Lamp, Buzzer, Meter, and Switch Assy as separate catalog entries. Match the component label to the Parts Number List for the correct part number. Verify your model variant first; wiring configurations differ between standard and P/PR variants.
Manual Section: Electric PartsFuel strainer or water separator part number needed, engine section shows multiple similar-looking components
Go to the Engine Parts Diagram for a positional exploded view of all engine-mounted components. Fuel Tank & Fuel Line lists Strainer Fuel Inlet and Separator Water as distinct items with separate part numbers. Identify your component by its position in the diagram, then pull the part number. Cross-reference your engine designation to confirm compatibility between 3TNA72L-UBA and 3TNA72L-UBB variants.
Manual Section: Fuel Tank & Fuel LineBoom cylinder or swing cylinder seal set part number unclear, swing geometry outside expected range
Check the Boom & Attachment Parts Diagram. Boom Cylinder and Swing Cylinder seal sets appear as separate line items under each assembly. Page 2 confirms the factory boom swing angle as 45 degrees left and 90 degrees right; if movement falls outside that range, inspect the swing cylinder seal set first. Pull the seal set part number and verify your model variant before ordering.
Manual Section: Boom CylinderFrequently Asked Questions
How do I confirm my B12 or B17 variant so I order the correct parts?
Locate the serial plate on the lower frame (Fig. 1 & 2). The Model Compatibility Chart maps all 8 variants (B12, B17, B12-P, B12-PR, B17-P, B17-PR, 3TNA72L-UBA, 3TNA72L-UBB) to their serial ranges. Match your number to lock in the exact variant before pulling any part number — wrong sub-model is the leading cause of incorrect orders.
What are the part numbers for the hydraulic oil piping hoses on the B12/B17?
Two hydraulic hoses cover the main oil circuit: part 172149-78210 (Hose, Hyd. Oil Piping — Tank to Valve) and 172142-77810 (Hose, Hyd. Oil Piping — Valve to Swivel/Motor). Both appear in the Hyd. Oil Piping section (pp. 50-54) with full exploded-view callouts.
What are the part numbers for the fuel strainer, water separator, and hydraulic suction filter?
Fuel Inlet Strainer: 101504-55101. Water Separator: 129335-55700. Hydraulic Suction Filter: 172137-73700. All three appear in the Fuel Tank & Fuel Line section as separate catalog entries with exploded-view positions.
How do I find the correct bucket cylinder seal kit part number for my B12 or B17?
Open the Bucket Cylinder section in the exploded view. The catalog lists Seal Set, Piston, and Rod Assy as separate line items with individual part numbers. Check bore dimensions in the Technical Specifications (p. 2) before ordering — seal sets differ across B12 and B17 variants.
Where do I find track roller, idler, and sprocket part numbers for the B12/B17 undercarriage?
The Crawler section breaks out every undercarriage component: Track Roller, Track Frame & Idler, Rubber Crawler, Sprocket, and Idler Assy — each with its own exploded view and part numbers. Confirm your model variant first; B12 and B17 series use different undercarriage components.
What is the boom swing angle spec, and how do I find the boom and swing cylinder seal set part numbers?
Factory boom swing angle is 45 degrees left and 90 degrees right (p. 2 Technical Specifications). Boom Cylinder and Swing Cylinder are separate catalog sections, each listing Seal Set as a distinct line item with its own part number.
Document Quality
This document is a scanned PDF, not a native digital file. It includes an OCR layer, so you can search and copy text throughout the document. The text quality is consistently crisp and easy to read across all pages. Diagrams and illustrations are raster images, but their labels are clear and legible. All pages are clean, free of scan artifacts, stains, or skewed content.
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