All 150 pages of this Yanmar B25 Parts Catalog (OEM #000Y00K2651) are built around one job: finding the exact part number for your 1990-1992 B25 or B25-1 crawler backhoe without guessing. Inside, you get a full picturesque index with exploded views covering every major system, from cab components and engine assemblies to a dedicated hydraulic section with 15 sub-figures. Open to the wiring diagram or hydraulic schematic when you need to trace a component back to its part number before ordering. The specifications page confirms machine identity fast: boom swing 50° left, 90° right; blade width 1,400 × 340 mm; ground pressure 0.27 kgf/cm². Tired of ordering the wrong part because a supplier's cross-reference was two model years off? Every figure is bookmarked and keyword-searchable. Pull it up on your phone or tablet at the parts counter, find the exploded view, read off the number, and order the right piece the first time.
What's Inside This Yanmar B25, B25-1, B25(-1) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface | 1 | Parts Catalog History, Model Name, Machine No., OEM #000Y00K2651 |
| Specifications | 2 | Engine, Dimensions, Std. Bucket Capacity, Max. Digging Depth, Machine Mass, Blade Width 1400x340mm, Boom Swing 50L/90R, Ground Pressure |
| Painted Color List | 3-4 | Yanmar Cream White, Yanmar Saffron Yellow, Yanmar Charcoal Gray |
| Engine & Fuel System Parts | 5-19 | Engine Assembly, Air Cleaner, Silencer, Fuel Tank, Fuel Pipe, Strainer, Filter Elements |
| Hydraulic Parts Diagrams | 20-30 | Hydraulic Cylinders, Blade Cylinder, Boom Swing Cylinder, Hose Routing, Seal Kits, Hydraulic Piping |
| Undercarriage Parts | 31-60 | Track Rollers, Idlers, Crawler Frame, Sprocket, Track Links, Ground Pressure Components |
| Body & Frame Parts | 61-100 | Cab Frame, Body Panels, Covers, Mounting Brackets, Structural Components |
| Attachment & Work Equipment Parts | 101-140 | Bucket, Arm, Boom, Front Attachment Cylinders, Pin & Bushing Assemblies |
| Electrical Wiring Diagram | 141-150 | Wiring Circuits, Electrical Components, Circuit Tracing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Boom swinging angle | Left 50 - Right 90 degree | p. 2 |
| Average ground pressure | 0.27 (0.26) kgf/cm³ | p. 2 |
| Blade Width × height | 1400 × 340 mm | p. 2 |
Yanmar B25, B25-1, B25(-1) Common Problems This Manual Covers
Yanmar B25 dozer blade cylinder leaks fluid and needs replacement but can't find the correct seal kit
Check the Hydraulic Parts Diagram for the front attachment cylinders. Locate the exploded view for the 1400 x 340 mm Blade Width assembly to identify the exact seal kit. Cross-reference the item number with the Parts Number List to order correctly.
Manual Section: SpecificationsBoom swing cylinder hoses blown out and need replacement part numbers for the entire hydraulic circuit
Review the Hydraulic Schematic to map the hose routing for the boom swing circuit. Since the boom swinging angle operates from Left 50 - Right 90 degree, specify the correct flexible hoses from the parts list that accommodate this full range of motion.
Manual Section: SpecificationsUndercarriage track components are severely worn and need exact part numbers for replacement rollers and idlers p. 1
Inspect the parts groupings for the B25 - P (R) model which has an average ground pressure of 0.27 (0.26) kgf/cm³. Verify your exact machine version using the Model Compatibility Chart on page 1 to ensure you order the correct heavy-duty track rollers and idler assemblies.
Manual Section: PrefaceCab and body panels are scratched and need the exact factory paint codes for touch up work p. 4
Identify the correct paint using the Painted Color List on page 4. Select the matching factory color like Yanmar Saffron Yellow or Yanmar Charcoal Gray for your specific body panels. Apply this paint to protect the 1400 x 340 mm Blade Width components from rust after field repairs.
Manual Section: Painted Color ListFrequently Asked Questions
What are the replacement specifications for fuel filter?
For the fuel filter, the manual lists the "STRAINER,FUEL INLET" with part number 101504-55101 and the "BOWL, FUEL STRAINER" with part number 124064-55510. Additionally, the "ELEMENT" for the fuel filter has part number 121257-55720. These parts are detailed in Figure 7, which covers the fuel tank and fuel pipe.
What are the replacement specifications for air filter?
For the air filter, the manual specifies the "CLEANER ASSY, AIR" with part number 119812-12500. The "BODY, AIR CLEANER" is listed with part number 119812-12520, and the "ELEMENT" for the air cleaner has part number 121120-12901. These components are found in Figure 4, related to the air cleaner and silencer.
How do you fix dozer blade cylinder leaks fluid and needs replacement but cant find the correct seal kit?
Check the Hydraulic Parts Diagram for the front attachment cylinders. Locate the exploded view for the 1400 x 340 mm Blade Width assembly to identify the exact seal kit. Cross-reference the item number with the Parts Number List to order correctly.
How do you fix boom swing cylinder hoses blown out and need replacement part numbers for the entire hydraulic circuit?
Review the Hydraulic Piping Diagram to map the hose routing for the boom swing circuit. Since the boom swinging angle operates from Left 50 - Right 90 degree, specify the correct flexible hoses from the parts list that accommodate this full range of motion.
What format is this manual in?
Instant PDF download. You get the full 150-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this manual include wiring diagrams?
Yes, an electrical wiring diagram is included to help trace the main circuits.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text throughout is generally crisp and easy to read, with no significant fading or blurriness. Diagrams and illustrations are clear line drawings, and all labels are readable. Pages are clean with no notable stains or marks, though some exhibit a slight skew from the scanning process. There are no notable blank or filler pages in the document.
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