Every single bolt, pin, and hydraulic fitting on your machine is accurately mapped out in this 529-page Yanmar b4u-1 parts catalog pdf (OEM #Y00K3701). You get complete exploded views of the entire crawler backhoe, covering everything from the engine mounts and radiator assemblies to the 4-way multi-valve and boom pins. Open up detailed component breakdowns showing exact factory part numbers, interchangeability notes, and clear wiring diagrams to help trace complex electrical circuits. Verify your machine's standard electrical setup requires a 12V, 68Ah battery (FZG - D26L) directly from the factory specification charts before ordering any aftermarket replacements. Wrong parts mean wasted days. Grab this digitally bookmarked download, pull up the exact assembly on your shop tablet, and get your parts order right the first time.
What's Inside This Yanmar B4U-1 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| How to Read This Parts Catalog | 1 | Ref. No., Level, Change Mark, Interchangeability Mark, Effective Machine No. |
| Introduction | 2 | Catalog Usage, Applicable Models, Genuine Parts Notes |
| Specifications | 3 | Model, Machine Mass, Engine, Output, Rotation Speed, Max. Digging Depth, Travel Speed |
| Vehicle Painted Color (Previous) | 4 | Early-Production Color Divisions, Descriptions, Munsell Numbers, Paint Part Numbers |
| Vehicle Painted Color (New) | 5 | Revised Color Divisions, Descriptions, Munsell Numbers, Paint Part Numbers |
| Paint Part No. | 6 | Spray-CAN Part Numbers, Spray Type, Application Quantity, Color-Code Cross-Reference |
| Wiring Diagram (1) | 7 | - |
| Wiring Diagram (2) | 8 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery voltage and capacity | 12V, 68Ah - 1 (F2G - D26L) | p. 3 |
| Battery voltage | 12V | p. 3 |
| Battery capacity | 68Ah | p. 3 |
Yanmar B4U-1 Common Problems This Manual Covers
Yanmar B4U-1 replacement battery specifications and wiring harness part numbers for hard starting and clicking starter p. 3
Check the Specifications chart on page 3. Verify you are sourcing a 12V, 68Ah rated battery. Inspect the parts list to locate the main harness connectors and identify the correct replacement terminal part numbers for your specific machine serial range.
Manual Section: SpecificationsNeed to order replacement electrical harness connectors due to intermittent functions and blown fuses p. 7
Inspect the Wiring Diagram(1) on page 7. Trace the circuit paths to identify the correct replacement terminal and connector part numbers. Verify your machine uses the standard 12V, 68Ah battery setup before ordering relays to ensure perfect fitment with your electrical system.
Manual Section: Wiring Diagram(1)Unable to find the exact Munsell color code and paint part numbers for chassis rust and flaking p. 5
Check the Vehicle Painted Color (New) chart on page 5. Identify the Color Division and find the corresponding Painted Color Munsell No. for your components. Disconnect the 12V, 68Ah battery before prepping and painting any metal surfaces near exposed positive electrical terminals.
Manual Section: Vehicle Painted Color (New)Looking for correct hydraulic hose and seal kit part numbers for leaking swing motor components
Search the Turning Motor Diagrams to locate the exploded view of the swing drive. Identify the specific seal kit and hose part numbers required. Confirm your equipment operates on the standard 12V system if you need to order attached solenoid control valves.
Manual Section: Turning Motor DiagramsFrequently Asked Questions
What are the replacement specifications for hydraulic hoses?
The manual provides part numbers and lengths for various hydraulic hoses. For example, part number 182901-35120 is a "HOSE, 950MM", part number 182901-35160 is a "HOSE, 400MM", and part number 182901-35090 is a "HOSE, 1870MM". These specifications are found in the hydraulic piping sections.
What are the replacement specifications for hydraulic seals?
The manual lists various hydraulic seals with their part numbers and sometimes dimensions. For instance, part number 953KM0-00451 is a "SEAL, DUST", part number 182900-25270 is a "SEAL", and 172511-91320 is a "SEAL 50X60X4, DUST". These details are provided in the parts lists for hydraulic cylinders and other components.
How do you fix yanmar B4U-1 replacement battery specifications and wiring harness part numbers for hard starting and clicking starter?
Check the Specifications chart on page 3. Verify you are sourcing a 12V, 68Ah rated battery. Inspect the parts list to locate the main harness connectors and identify the correct replacement terminal part numbers for your specific machine serial range.
How do you fix need to order replacement electrical harness connectors due to intermittent functions and blown fuses?
Inspect the Wiring Diagram(1) on page 7. Trace the circuit paths to identify the correct replacement terminal and connector part numbers. Verify your machine uses the standard 12V, 68Ah battery setup before ordering relays to ensure perfect fitment with your electrical system.
How quickly can I access this manual after buying?
Immediate download of the complete 529-page searchable Parts Catalog. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this Yanmar B4U-1 manual include wiring diagrams?
Yes. You'll find an electrical wiring diagram covering the main wiring layout.
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