Part of the Yanmar Parts Manuals.
All 204 pages of this Yanmar B50-P(R), B50-O(R), and B50-C(R) Crawler Backhoe Parts Catalog (OEM #Y00K2511-1) are built around one job: putting the correct OEM part number in your hand before you spend an hour on hold with a dealer. Inside, exploded views walk through every major system, from cab assembly and engine mounts to control valves, travel motor internals, and boom cylinder components, with a wiring diagram covering the full electrical system. Part numbers run through every section: track roller O-rings, pilot valve shims, hydraulic piping connectors, bucket teeth assemblies, and everything between. The model chart confirms your B50-O(R) reaches 5100 mm cutting depth and 3550 mm dumping height, so you're ordering parts matched to the right variant. Wrong part number, two-week wait. Bookmarked and keyword-searchable; pull up the section you need and have the OEM number ready before you call the counter.
What's Inside This Yanmar B50-P(R) / O(R) / C(R) Series Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Accelerator, Fuel Tank & Fuel Line | |
| Cooling System | Radiator & Oil Cooler | |
| Engine | Engine Mount, Hyd. Oil Pump & Joint | |
| Electrical System | Battery, Electric Part, Work Lamp | |
| Undercarriage & Travel | Track Roller & Carrier Roller, Track Frame & Idler, Travel Motor | |
| Rear Axle, Differential & Brakes | Brake Valve | |
| Hydraulics & 3-Point Hitch | Boom Cylinder, Arm Cylinder, Bucket Cylinder, Swing Cylinder, Blade Cylinder, Turning Motor, Swivel Joint, Control Valve, Pilot Valve, Remote Control Valve & Cut Off Valve, Rotary Valve, Hyd. Oil Tank, Hyd. Oil Piping, Control Piping | |
| Loader, Backhoe & Attachments | Boom & Boom Bracket, Arm & Bucket Link, Bucket | |
| Body & Operator Station | Heater & Defroster, Radio, Turning Frame, Frame Cover, Seat & Step, Bonnet | |
| Decals & Accessories | Label, Tool, Greasing | |
| Other Components | Inlet Hose & Exhaust Pipe, Control Equipment, Operation Lever Stopper, Turning Driving Gears |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Max. cutting depth | 5100 mm | p. 1 |
| Max. dumping height | 3550 mm | p. 1 |
Yanmar B50-P(R) / O(R) / C(R) Series Common Problems This Manual Covers
Yanmar B50-O(R) major hydraulic leak at the main lift arm, need the boom cylinder seal kit part number
Check the Boom Cylinder exploded view on page 89. Locate the correct seal kit for your specific serial number. Verify your machine reaches the max dumping height of 3550 mm to confirm you have the B50-O(R) configuration before ordering replacement seals.
Manual Section: Boom Cylinder p. 89Engine fires up but sputters and dies, cannot locate the correct replacement fuel filter and tank strainer
Inspect the Fuel Tank & Fuel Line breakdown on page 22. Identify the exact fuel strainer and inlet hose part numbers. If you operate the B50-O(R) variant with the 5100 mm max cutting depth, cross-reference the specific tank cap and gauge components for your exact model.
Manual Section: Fuel Tank & Fuel Line p. 22Tracks barely move while other functions operate normally, needing diagram for travel motor internal rotary set
Review the Travel Motor drivetrain parts diagram on page 108. Find the correct case set, piston, and retainer part numbers for your unit. Match the rotary set components carefully, especially if your machine is the B50-O(R) capable of the 3550 mm max dumping height.
Manual Section: Travel Motor p. 108Excessive wear and squealing at the bucket linkage, missing the correct grease nipple part numbers
Examine the Arm & Bucket Link parts list on page 180. Locate the replacement Nipple PT1/8 and corresponding shim sets. Order the exact pin assembly and side cutter hardware to restore tight linkage tolerances when digging to the 5100 mm max cutting depth.
Manual Section: Arm & Bucket Link p. 180Severe engine vibration and rattling from the engine room, broken support brackets and missing hardware
Check the Engine Mount parts diagram on page 19. Identify the correct shock absorbers, stopper brackets, and Bolt M 12X 25 hardware. Order the precise support assembly to secure the engine block and prevent alignment issues with the radiator and oil cooler.
Manual Section: Engine Mount p. 19Frequently Asked Questions
What are the replacement specifications for hydraulic hoses?
The manual provides part numbers and descriptions for various hydraulic hoses. For example, a "HOSE" with part number 172151-78410 is listed on page 147. Another example is "HOSE G208AB100W" with part number 172124-78400 on page 158. These specifications identify the correct replacement parts. p. 147
How quickly can I access this Yanmar B50-P(R) manual after buying?
You get a 204-page searchable PDF (4 MB) that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print just the pages I need from this Yanmar B50-P(R) manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are electrical wiring diagrams included in this Yanmar B50-P(R) Parts Catalog?
Yes, an electrical wiring diagram is included to help trace the main circuits.
Reviews
There are no reviews yet.