Part of the Yanmar Parts Manuals.
Need the exact part numbers for your 2004 Yanmar Vio20-3 crawler back-hoe? This 248-page parts catalog (OEM #0CK10-M39703EN) breaks down every single component with crisp exploded views. You get complete hardware breakdowns for the entire machine, spanning the track frame, hydraulic pumps, and heavy-duty boom assemblies. Open the catalog to find detailed parts lists paired with factory wiring diagrams to help you identify every last harness and relay. Confirm the exact dimensions of the 22.15X43 track link bush and verify the correct part numbers for your 15A fuses before placing a supply order. Stop wasting days waiting for the wrong hardware to arrive. Grab this bookmarked download, pull it up on your phone in the shop, and get the right numbers on the first try.
What's Inside This Yanmar ViO20-3 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Fuel System | Accelerator, Fuel Tank, Fuel Line | |
| Cooling System | Radiator & Mount | |
| Electrical System | Wiring, 139.Wiring, Work Lamp, Canopy Lamp | |
| Hydraulics & 3-Point Hitch | Quick Coupler, Control Valve Plate, 123.Control Valve Plate | |
| Body & Operator Station | Turning Frame | |
| Decals & Accessories | Label, 155.Label, 169.Label, 156.Label, 140.Label, 157.Label, 158.Label, 159.Label, Safety Label, 141.Safety Label, Accessory | |
| Other Components | Reference Materials, Suction Pipe & Exhaust Pipe, Engine Mount, Duct, Buttery, Equipment, Heater, Sprocket & Roller, 144.Track Roller, Idler & Adjust, Crawler, Control Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| FUSE, B 5A | 2 | p. 49 |
| FUSE, B 15A | 6 | p. 49 |
| FUSE, B 30A | 2 | p. 49 |
| SENSOR ASSY,PRES | 35M | p. 58 |
| BUSH | 22.15X43 | p. 67 |
| PIN | 4X22,LOCK | p. 67 |
| O-RING | 1BP14.0 | p. 135 |
Yanmar ViO20-3 Common Problems This Manual Covers
Yanmar Vio20-3 weak swing requires high revs to move and needs hydraulic pump seal replacement parts
Inspect the hydraulic pump exploded view on page 133 for the rotary set and relief valve components. Verify the exact O-ring required, such as the 1AG45.0 or 1AP9.0 O-ring. Cross-reference the pump assembly part number with your machine's serial number to ensure correct fitment before ordering.
Manual Section: Hyd.Oil Pump & Joint(To M36239) p. 133Unpredictable operation or loss of function after rain with blown electrical system components
Check the wiring harness assembly breakdown on page 49. Replace any blown slowblow fuses with the correct rating, such as the 15A fuse (qty 6) or the 30A fuse (qty 2). Match the replacement fuse part numbers exactly to restore stable electrical operation across the machine.
Manual Section: Wiring p. 49Loud noise and vibration coming from the undercarriage during travel with worn track components
Review the crawler track shoe assembly breakdown on page 67. Replace the worn 22.15X43 bush and the 4X22 lock pin connecting the track links. Order the complete track link assembly using the exact part numbers listed to eliminate undercarriage vibration.
Manual Section: Crawler p. 67Crane equipment pressure sensor failure triggering intermittent system faults during heavy lifting operations
Inspect the crane equipment harness and pressure sensor breakdown on page 58. Replace the faulty 35M pressure sensor assembly using the exact part number shown. Verify the harness connector part numbers in the diagram to ensure a watertight seal after installation.
Manual Section: Equipment(Crane)(2) p. 58Frequently Asked Questions
What are the replacement specifications for Hydraulic pump?
The manual provides part numbers for the hydraulic pump assembly. For models up to M36239, the part number is 172456-73100. For models from M36240, the part number is 172A23-73100. The catalog does not specify detailed replacement procedures or torque values. p. 133
What are the replacement specifications for Swing motor components?
The manual lists the swing motor assembly part number as 172456-73310. It also provides part numbers for various components such as the valve (172456-77100), seal set (172456-77110), and bolts (172456-77130). Detailed replacement specifications like torque or specific procedures are not provided. p. 163
How do you fix yanmar Vio20-3 weak swing requires high revs to move and needs hydraulic pump seal replacement parts?
Inspect the hydraulic pump exploded view on page 133 for the rotary set and relief valve components. Verify the exact O-ring required, such as the 1AG45.0 or 1AP9.0 O-ring. Cross-reference the pump assembly part number with your machine's serial number to ensure correct fitment before ordering. p. 133
How do you fix unpredictable operation or loss of function after rain with blown electrical system components?
Check the wiring harness assembly breakdown on page 49. Replace any blown slowblow fuses with the correct rating, such as the 15A fuse (qty 6) or the 30A fuse (qty 2). Match the replacement fuse part numbers exactly to restore stable electrical operation across the machine. p. 49
Is this Yanmar Vio20-3 Parts Catalog a digital download?
You get a 248-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this Yanmar Vio20-3?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Does this Yanmar Vio20-3 manual include wiring diagrams?
Included. The Yanmar Vio20-3 Parts Catalog provides a wiring diagram for the electrical system.
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