Need the factory part numbers for your 1993-1997 Yanmar VIO20 crawler backhoe? This 151-page parts catalog (OEM #Y00K2902) maps every system from the engine bay to the boom tip. Inside: exploded views for engine, hydraulic, chassis, cab, and boom assemblies, each keyed to exact OEM part numbers with full cross-references so you order the right piece on the first call. Hydraulic schematics and wiring diagrams round out the component identification picture. The factory data holds up: engine bore and stroke run 68 x 72 mm, and hydraulic cylinder dust seals measure 50 x 60 x 4 mm. Stop showing up at the counter with a description and a prayer. Bookmarked by section; open it on your phone, search the part name, and place the order before you walk back to the machine.
What's Inside This Yanmar VIO20 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 1-5 | Engine Model, bore/stroke 68x72mm, Rated Power, Operating Weight, Bucket Capacity, Max Digging Depth, Travel Speed |
| Hydraulic System Parts | 50-80 | Hydraulic Cylinder Dust Seal 50x60x4mm, Bucket Cylinder Dust Seal 38x48x4mm, Hydraulic Pump, Control Valve, Cylinder Rod Seal Kits |
| Electrical System Parts | 81-100 | Wiring Harness, Battery, Starter Motor, Alternator, Fuse, Relay, Switches, Electrical Components |
| Boom & Arm Assembly Parts | 101-130 | Boom Cylinder, Arm Cylinder, Bucket Link, Pins and Bushings, Boom Pivot, Dipper Arm Assembly |
| Undercarriage & Travel Parts | 131-145 | Track Chain, Track Shoe, Sprocket, Idler, Roller, Travel Motor, Track Frame |
| Engine & Cooling Parts | 15-49 | Engine Assembly, Cooling System, Fuel System, Air Cleaner, Exhaust, Engine Mounts |
| Painted Parts & Color Reference | 1-14 | Painted Color Munsell Codes, Color Chart, Paint Part Numbers, Spray Type, Main Parts Colors |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Seal dimension | 50x60x4 mm | p. 57 |
| Bore x Stroke | 68 x 72 mm | p. 2 |
| Travel speed (High/Low) | 4.6 / 2.3 km/h | p. 2 |
Yanmar VIO20 Common Problems This Manual Covers
Yanmar VIO20 hydraulic cylinder weeping fluid around the rod end after heavy digging
Check the hydraulic parts diagram for the correct seal kit breakdown. Identify the individual dust seal listed as 50x60x4 mm on page 57. Cross-reference the required O-rings and backup rings with the main parts number list to complete your order.
Manual Section: SpecificationsEngine cranks slowly or refuses to start completely during cold morning shifts
Inspect the wiring diagram to trace the battery and starter circuits. Locate the specific alternator part number and mounting hardware. Verify engine specifications on page 2 showing the 68 x 72 mm bore and stroke to ensure you order the correct starter match.
Manual Section: SpecificationsBoom pivot point losing pressure and dropping the attachment during operation
Review the boom and attachment parts diagram for the cylinder breakdown. Find the replacement dust seal measuring 38x48x4 mm on page 134. Match the seal part numbers exactly to your machine serial number range to prevent ordering incompatible bucket cylinder components.
Manual Section: SpecificationsMachine drifts to one side because maximum travel speed drops entirely
Examine the chassis parts diagram to locate the travel motor components. Confirm the assembly matches the factory travel speed rating of 4.6 / 2.3 km/h on page 2. Pull the correct replacement drive sprocket and final drive motor part numbers for your order.
Manual Section: SpecificationsFrequently Asked Questions
What is the hydraulic cylinder rod seal specification for the Yanmar VIO20 excavator?
The VIO20 uses a hydraulic cylinder dust seal measuring 50x60x4mm for the main cylinders (see p.57). The bucket cylinder uses a dust seal of 38x48x4mm (p.134). Replacing these seals resolves hydraulic weeping/leaking at rod ends.
What are the engine bore and stroke specifications for the Yanmar VIO20?
The Yanmar VIO20 engine has a bore of 68mm and stroke of 72mm (see p.2 Specifications section). This 3-cylinder diesel engine provides the power for hydraulic and travel systems.
Where can I find the wiring diagram and electrical component parts for the VIO20?
The Parts Catalog includes the electrical system section covering the wiring harness, battery, starter motor, alternator, fuses and relays. The wiring diagram covers battery-to-starter-to-alternator circuit connections needed for electrical fault diagnosis.
Which parts catalog covers the Yanmar VIO20 Crawler Backhoe built between 1993 and 1997?
OEM Parts Catalog Y00K2902 covers the Yanmar VIO20 Crawler Backhoe for model years 1993-1997. This 151-page catalog includes illustrated parts breakdowns for the hydraulic system, electrical system, boom/arm assembly, undercarriage, and engine components.
Document Quality
This document is a scanned PDF that includes an OCR text layer, so you can easily search and copy text from any page. The text itself is consistently crisp and clear, ensuring good readability throughout. Diagrams and illustrations are scanned raster images; they are generally clear and their labels are readable, though they won't retain vector-sharpness when heavily zoomed. Page conditions are clean with only minor, typical scanning artifacts, and there are no entirely blank or unnecessary filler pages present.
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