Need the factory rundown for your Yanmar ViO27-5 or ViO35-5 excavator? This 240-page operator manual (OEM #172A46-07310) covers both machines: safety precautions, control functions, operating procedures, and scheduled maintenance. Inside, you get a full safety chapter with signal-word breakdowns, rollover and burn hazard warnings, and operating precautions for slopes, parking, and fuel handling. The controls section maps every monitor display (fuel level, coolant temp, oil pressure, hourmeter), switch, and lever so you know your panel before you turn the key. Yanmar rates the fuel injection pump assembly at 3,000 hours or 5 years; that service window is spelled out, straight from the factory. Every hour offline costs money. Search by keyword or jump to any bookmarked section, and get the right answer on the first try.
What's Inside This Yanmar ViO27-5, ViO35-5 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3 | Manual Purpose, Warnings, Proper Use, Customer Support |
| Safety Information | 4 | Signal Words (Danger, Warning, Caution, Important), Bodily Injury, Property Damage, Unauthorized Modifications |
| Product Overview | 5-6 | Intended Uses (Digging, Leveling, Shoveling), Break-In Period, Epa Emission Standards Compliance |
| Ordering Replacement Parts and Service Call | 8-9 | Machine Serial Number, Engine Serial Number, Epa Emission Control Plate, Warranty Terms |
| Basic Precautions | 15-20 | Safety Rules, Install Safety Devices, Wear Proper Clothing, Unauthorized Modifications, fuel/oil Safety |
| Operating Precautions | 21-45 | Starting Engine, Seatbelt, ROPS/FOPS, Traveling, Running on Slope, Hooked Bucket, Parking |
| Precautions for Servicing | 46-57 | Servicing in Progress Tag, Periodically Replace Parts, Stop Engine, Working Under Machine, fueling/oiling, Battery Handling |
| Safety Messages (Warning Labels) | 58-85 | Location of Warning Labels, Rollover Hazard, Burn Hazard, Crush Hazard, Travel Levers |
| Identification of Important Parts | 87-88 | Machine Overview (Arm, Bucket, Boom, Blade), Controls and Switches (Travel Lever, Boom Swing Pedal, Lock Lever, Monitor) |
| Description of Control Devices | 89-113 | Monitor Functions (Fuel, Temp, Oil Pressure, Hourmeter), Switches (Starter, Light, Horn, Wiper), Control levers/pedals (Lock, Travel, Accelerator, Blade) |
| Operating Instructions | 114-200 | Pre-Operation Checks (Cooling Water, Engine Oil, Fuel, Hydraulic Oil, Battery), Starting Engine, Traveling, Steering, Stopping, Operating Implements, Handling Quick Coupler |
| Transportation | 201-206 | Loading/unloading Machine, Precautions for Loading, Suspending Machine |
| Troubleshooting | 214-220 | Phenomena Not Breakdowns, Towing, Battery Overdischarged, Starting with Booster Cables, engine/electrical Troubleshooting, Machine Performance Troubleshooting |
| Basic Servicing Practices | 227-233 | Oils, Fuel, Cooling Water, Grease, Filters, Electrical Equipment, Hydraulic System |
| Procedures for Maintenance | - | First Services, Nonperiodic Services (Track, Bucket Teeth), Adjusting Track Tension, Cleaning Cooling System, Air Cleaner, radiator/oil Cooler Fin, governor/accelerator, Lube Oil |
| Specifications and Dimensional Diagrams | - | Operating Mass, Bucket Capacity, Engine Specs, Hydraulic System, Outline Drawings |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Warranty period (Fuel injection pump assembly) | 3000 hours / 5 years | p. 6 |
Yanmar ViO27-5, ViO35-5 Common Problems This Manual Covers
Yanmar VIO27-5 travel levers feel stiff and machine does not move straight during forward operation. p. 220
Check the machine performance troubleshooting guide on page 220. Inspect the track area for packed mud binding the travel motor. Verify the hydraulic fluid level and top off the reservoir with ISO VG 46 fluid if it rests below the low mark.
Manual Section: Machine performance troubleshootingStarter switch turns to start position but engine cranks without starting and emits dark fumes. p. 219
Check the engine and electrical equipment troubleshooting steps on page 219. Drain the water separator and inspect the filters. If the fuel injection pump assembly has failed, check your records to verify if it falls under the 3000 hours or 5 years warranty period listed on page 6.
Manual Section: Engine and electrical equipment troubleshootingWater temperature alarm activates on the monitor while digging and steam vents from the engine bay. p. 219
Stop the engine and check the engine and electrical equipment troubleshooting steps on page 219. Inspect the overflow bottle for loose hose clamps or rotting coolant hoses. Top off the coolant and inspect the hydraulic system for degraded ISO VG 46 fluid contributing to overheating.
Manual Section: Engine and electrical equipment troubleshootingBoom and bucket operation is extremely slow and hydraulic fluid pressure warning illuminates on dashboard. p. 89
Shut down the machine immediately and review the monitor functions described on page 89. Check the engine oil dipstick and inspect the hydraulic overflow bottle. Ensure you are using the correct ISO VG 46 fluid for hydraulic top-offs to prevent cross-contamination during daily maintenance.
Manual Section: Description of Control DevicesFrequently Asked Questions
What is the hydraulic pressure spec for the excavator?
The hydraulic pump displacement is 10.2 (38.6) ×2 <Variable displacement pump> GPM (L/min). The system relief set pressure is 3200 (22.1)×2, 3130 (21.6)×1 PSI (MPa).
How do I check hydraulic oil level and coolant on a mini excavator?
To check the hydraulic oil level, ensure it is between the upper and lower limit marks on the oil level gauge on the left side of the machine. For coolant, open the engine hood rear cover and verify the level is between the FULL and LOW marks in the sub-tank (1). If low, add cooling water to the FULL mark through the sub-tank's supply port. Refer to Section "21. Fueling, Oiling and Greasing Based on Temperature Range" for oil and coolant specifications.
What are the replacement specifications for Hydraulic fluid (ISO VG 46)?
For the hydraulic oil system, the recommended hydraulic oil is ISO VG46. The prescribed amount of oil is 5.5 Gals. (35 L) in the tank and 4.8 Gals. (18 L) for other parts, or 9.5 Gals. (36 L).
How do you fix travel levers feel stiff and machine does not move straight during forward operation?
Check the machine performance troubleshooting guide on page 220. Inspect the track area for packed mud binding the travel motor. Verify the hydraulic fluid level and top off the reservoir with ISO VG 46 fluid if it rests below the low mark.
What format is this manual in?
This is a 240-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print specific sections of this Operator Manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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