Part of the Yanmar Parts Manuals.
All 248 pages of this Yanmar YB451, YB501 Crawler Backhoe Parts Catalog (OEM #Y00K2094) map factory part numbers for every 1985–1991 YB451(-2) and YB501(-2) variant, covering P, C, and UZ chassis configurations. Inside you get exploded-view diagrams and numbered parts tables across the entire machine: engine mount, fuel system, hydraulic oil pump and piping schematics, control valves, boom and arm cylinders, track frame, swivel joint, turning motor, and full cabin and canopy assemblies. Wiring diagrams detail the complete electrical layout, wire color codes, and harness routing for both canopy and cabin specs. Machine travel is rated at 3.6 km/h high range and 1.9 km/h low range, with ground pressure and model dimensions included in the specifications section. No more ordering the wrong-variant part and waiting a week to find out. Bookmarked by section and searchable by keyword, pull it up on your phone at the parts counter and get the right number on the first call.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Accelerator, Fuel Tank & Fuel Line | |
| Cooling System | Engine Mount & Radiator | |
| Engine | Silencer, Hyd. Oil Pump & Joint | |
| Electrical System | Wiring Diagram, Battery, Electric Part, Electric Part Fig 15, Electric Part Fig 16, Switch & Quartz Clock | |
| Undercarriage & Travel | Track Roller & Carrier Roller, Track Frame & Idler, Crawler, Travel Motor | |
| PTO | P.T.O. Valve Piping, P.T.O. Valve | |
| Hydraulics & 3-Point Hitch | Hyd. Oil Piping, Hyd. Oil Tank Fig 55, Hyd. Oil Tank Fig 56, Control Valve, Boom Cylinder, Arm Cylinder, Bucket Cylinder, Swing Cylinder, Blade Cylinder, Turning Motor, Swivel Joint, Valve Stopper | |
| Loader, Backhoe & Attachments | Boom & Bucket, Boom & Arm, Blade, Bucket400, Bucket550, Bucket600, Bucket650, Bucket700, Bucket330 | |
| Body & Operator Station | Rear View Mirror, Heater & Defroster, Radio, Turning Frame, Bonnet, Bonnet Fig 35, Bonnet Fig 36, Seat & Step, Seat & Step Fig 38, Seat Mount & Step, Canopy, Cabin Fig 44, Front Open Cabin, Flat Cabin, Cabin Fig 47, Wind Washer | |
| Decals & Accessories | Label, Label Fig 2, Label Fig 3, Label Fig 4, Tool, Greasing | |
| Other Components | Specifications, Parts Name, Control Equipment, Control Equipment Fig 27, Control Equipment Fig 29, Turning Driving Gears, Hook, Lift Pin, Defroster B Fig 84, Defroster B Fig 85, Stereo, B Type Quick Lever |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel speed | 3.6 - 1.9 km/h | p. 3 |
