All 148 pages of this Yanmar VIO20-1 Parts Catalog (OEM #Y00K3472) focus on one thing: identifying and ordering the correct parts for your 1997-2000 Crawler Back Hoe without guesswork. Inside, exploded-view assemblies cover every major system: engine, hydraulics, cab, chassis, boom, and drivetrain, each component labeled with its factory OEM part number for direct ordering. You also get a full wiring diagram with wire color codes, relay locations, and fuse box layout, plus hydraulic schematics routing the complete fluid circuit. The Specifications page anchors the catalog with machine data including engine model, rated dimensions, standard bucket capacity, and maximum digging depth, so you can cross-verify fitment before placing an order. Wrong parts cost you a week. Download this catalog, jump to the bookmarked section for your system, confirm the part number, and call your supplier with confidence.
What's Inside This Yanmar VIO20-1 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface | 1 | Safety Precautions, General Information, Model Overview |
| Specifications | 2 | Model, Engine, Dimensions, Std. Bucket Capacity, Max. Digging Depth, Machine Mass |
| Painted Color List | 3 | Painted Color, Munsell No., Color Code, Paint Part No., Main Parts Color |
| Paint Part No. & Color of Main Parts | 4 | Label, Safety Label, Tool, P.T.O. Kit, Silenser & Air Cleaner, Engine Mount, Radiator & Mount |
| Picturesque INDEX(1) Main Parts | 5 | Engine Assembly, Cooling System, Fuel System, Air Cleaner, Exhaust System |
| Picturesque INDEX(2) Hydraulic Section | 6 | Hydraulic Pump, Control Valve, Hydraulic Hose 172183-78010, Suction Strainer, Return Filter, Cylinder Seal Kit 172173-72922 |
| Picturesque INDEX(3) Figure 01-12 | 7 | Swing Bracket, Boom Assembly, Arm Assembly, Bucket Assembly, Boom Cylinder |
| Picturesque INDEX(3) Figure 13-24 | 8 | Arm Cylinder, Bucket Cylinder, Pin & Bush Kit, Attachment Parts |
| Picturesque INDEX(3) Figure 25-36 | 9 | Undercarriage, Track Frame, Travel Motor, Track Roller, Carrier Roller |
| Picturesque INDEX(3) Figure 37-48 | 10 | Upper Structure, Cab Frame, Counterweight, Swing Motor, Swing Gear |
| Picturesque INDEX(3) Figure 49-60 | 11 | Operator Cab, Control Levers, Seat, Canopy, Floor Plate |
| Picturesque INDEX(3) Figure 61-64 | 12 | Blade Assembly, Blade Cylinder, Dozer Blade, Blade Pivot |
| Electric Part (Wiring) | 13 | Wiring Diagram, Starter Switch, Fuse Box, Relays, Lamps, Hour Meter, Wire Color Codes |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| VIO20-1 Crawler Backhoe | ||
| Parts Catalog | ||
| 148 | ||
| Y00K3472 | ||
| 1997–2000 | ||
| 172173-72922 | ||
| 172183-78010 |
Yanmar VIO20-1 Common Problems This Manual Covers
Yanmar VIO20-1 bucket cylinder seal kit part number unclear when multiple assemblies appear in the hydraulic diagram
Check the hydraulic parts diagram. Each cylinder appears in its own exploded view with individual item numbers for seals, O-rings, and backup rings. Note the seal kit item number, then confirm the part number. Verify machine specifications on page 2 before ordering to avoid a mismatch.
Manual Section: Hydraulic Parts DiagramTrack rollers and front idler wheel part numbers differ by position, can't confirm correct undercarriage fitment
Check the chassis parts diagram. Bottom rollers, carrier rollers, and front idler appear as separate line items in the undercarriage exploded view. Count the number of bottom rollers installed per side, then cross-reference that quantity. Confirm track shoe width from machine specifications on page 2 when ordering rubber track or link assemblies.
Manual Section: Chassis Parts DiagramEngine oil filter and hydraulic filter part numbers look identical in listing, need to verify correct filters
Check the engine parts diagram. Suction strainer, return filter, and engine oil filter each appear as separate labeled items with distinct item numbers. Cross-reference each before ordering. Hydraulic fluid capacity from specifications on page 2 helps size your order correctly when replacing both filters and changing fluid at the same interval.
Manual Section: Engine Parts DiagramBoom cylinder and arm cylinder seal kits share similar descriptions, part numbers hard to distinguish
Check the boom and attachment parts diagram. Boom cylinder and arm cylinder assemblies appear in separate exploded views, each with unique item numbers for the seal kit. Cross-reference both item numbers. Machine dimensions on page 2 list boom and arm reach; use these to verify you have the correct cylinder assembly before ordering seals.
Manual Section: Boom & Attachment Parts DiagramTravel motor and final drive internal component part numbers not locatable without knowing full assembly breakdown
Check the drivetrain parts diagram. Travel motor and final drive are shown as separate assemblies with individual item numbers for seals, bearings, and gear components. Identify the affected side, left or right, before cross-referencing. Machine operating weight from specifications on page 2 helps dealers confirm the correct load-rated components for your unit.
Manual Section: Drivetrain Parts DiagramRelay and fuse box part numbers not visible in wiring diagram without knowing how to read component labels p. 13
Check the wiring diagram on page 13 for component labels and wire color codes. Relays, fuse box, and starter switch are each identified by position in the diagram. Match each label to find the correct part number. Wire gauges and colors shown on page 13 help confirm you order the correct wiring components, not just the housing.
Manual Section: Wiring DiagramFrequently Asked Questions
What are the replacement specifications for hydraulic hoses?
The manual provides replacement specifications for various hydraulic hoses, including their part numbers and dimensions. For example, specific hoses are listed as "HOSE 38.1X50.2" (part number 172183-78010), "HOSE 25.4X37.5" (part number 172183-78030), and "HOSE 19.0X31.4" (part number 172183-78050).
What are the replacement specifications for bucket cylinder seals?
Replacement specifications for bucket cylinder seals include seal kits and individual seal components with their respective part numbers and dimensions. For instance, a "SEAL KIT, CYLINDER" is available under part number 172173-72922, and a "SEAL KIT, PISTON" under part number 172173-72942. Individual seals like "SEAL 35X45X4" (part number 172171-81280) and "RING 45, SPRING" (part number 933125-88600) are also specified.
How do you fix yanmar VIO20-1 bucket cylinder seal kit part number unclear when multiple assemblies appear in the hydraulic diagram?
Check the hydraulic parts diagram. Each cylinder appears in its own exploded view with individual item numbers for seals, O-rings, and backup rings. Note the seal kit item number, then confirm the part number. Verify machine specifications on page 2 before ordering to avoid a mismatch.
How do you fix track rollers and front idler wheel part numbers differ by position, can't confirm correct undercarriage fitment?
Check the chassis parts diagram. Bottom rollers, carrier rollers, and front idler appear as separate line items in the undercarriage exploded view. Count the number of bottom rollers installed per side, then cross-reference that quantity. Confirm track shoe width from machine specifications on page 2 when ordering rubber track or link assemblies.
How will I receive this Yanmar VIO20-1 Parts Catalog?
Instant PDF download. You get the full 148-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print 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 Yanmar VIO20-1 Parts Catalog have electrical diagrams?
Yes. You'll find an electrical wiring diagram covering the main wiring layout.
Document Quality
This document is a scanned PDF, meaning the original pages were physically scanned. You can search the full text of the document, as an OCR layer has been applied, making most of the text selectable and copyable. Text quality is generally crisp and readable throughout, with no significant blurriness or fading. Diagrams and illustrations are raster images, so they may show some pixelation when zoomed in, but labels are consistently clear and readable. Pages are clean with no notable scan artifacts, stains, or skewed content. There are no notable blank or filler pages.
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