Repairing your Yanmar excavator is straightforward when you have the 372-page Yanmar ViO10 (EP) service manual pdf covering both the ViO10 (EP) and ViO-2 (EP) variants. Inside, you get complete hydraulic circuit schematics mapping out boom and track gauge operations, plus accurate wiring diagrams for the entire machine. Open to the service standards chapter for page after page of troubleshooting steps, engine teardown procedures, and detailed torque tables to guide your shop work. Dial in your crawler tension adjustment to exactly 8 to 13 mm, and lock down the drive sprocket bolts between 44.1 and 58.8 N-m before hitting the dirt. Guessing destroys expensive parts. Grab this bookmarked digital file, pull it up on your tablet in the shop, and fix the machine right the first time.
What's Inside This Yanmar ViO10 (EP) Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 8-19 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 20-31 | Model Specifications, Engine Output, Operating Weight, Bucket Capacity, Relief Valve Pressure (20.6 MPa), Travel Speed, Gradeability |
| Service Standards | 32-49 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications), Controls, Hydraulic Equipment (Hydraulic Cylinders) |
| Engine | 50-91 | Engine Disassembly and Reassembly, Cylinder Head, Piston and Rings, Crankshaft Bearings, Fuel Injection Pump, Measurement Procedures |
| Hydraulic System | 92-97 | Outline (Control Valve Operation), Hydraulic Circuit Schematic (for Standard Type Machines) |
| Hydraulic Circuit Schematic | 98-124 | Main Relief Valve Settings, Control Valve Layout, Cylinder Port Connections, Pilot Circuit, Return Filter, Oil Cooler Circuit |
| Hydraulic Equipment | 125-241 | Hydraulic Cylinders (Boom/Arm/Bucket), Travel Motor Disassembly, Swing Motor, Control Valve Overhaul, Pilot Valve, Boom Cylinder U-Nut Torque (294–343 N·m) |
| Adjustment and Repair | 242-249 | Rubber Crawler Tension (8–13 Mm), Relief Pressure Adjustment, Hydraulic Oil Level, Travel Motor Brake Release, Safety Relay Insulation (100 MΩ) |
| Wiring Diagram | 250-327 | Electrical Circuit Schematics, Connector Locations, Fuse Box Layout, Safety Relay, Engine Control Wiring, Monitor Panel Circuit |
| Periodic Inspections and Servicing | 328-330 | Daily/50h/250h/500h Service Intervals, Hydraulic Oil Change, Engine Oil Change, Filter Replacement, Grease Points, Crawler Tension Check |
| Fuel, Lube Oil and Grease Recommended | 331-332 | Engine Oil SAE10W30 Cd (3.0 L), Hydraulic Oil Iso VG46, Grease Type, Fuel Specifications, Coolant Mix Ratio |
| Troubleshooting | 333-369 | Engine Starting Failure, Hydraulic Drift, Travel Deviation, Overheating, Boom/Arm/Bucket Weakness, Electrical Fault Diagnosis |
| Reference Data | 370-372 | Tightening Torque Table, Conversion Factors, Hydraulic Oil Capacity, Coolant Capacity, Service Parts List |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Sprocket tightening torque | 32.6 to 43.4 ft•lbf (44.1 to 58.8 N•m) | p. 47 |
| Wear limit for oil seal portion | 0.0010 in. (0.025 mm) or more | p. 239 |
| Working pressure for high pressure rubber hose (Hose dia. 02) | 2489 (17.2) PSI (MPa) | p. 15 |
| Crawler Tension Adjustment (H) | 0.31 to 0.51 in. (8 to 13 mm) | p. 266 |
| Sprocket wear limit (A) | 0.47 (12) in. (mm) | p. 42 |
| Safety relay insulation resistance (R) | 100 MΩ | p. 247 |
| Engine oil pressure switch working pressure | 5.69 to 8.53 PSI (0.04 to 0.06 MPa) | p. 245 |
| Hydraulic oil temperature (measuring condition) | 122 to 140 °F (50 to 60 °C) | p. 33 |
| Pilot valve oil leak (Control lever in neutral condition) | over 1.22 (20) cu.in. (cu.cm) / min. | p. 185 |
| Engine Model | 3TNE68-EBVB | p. 25 |
| Total Displacement | 47.8 cu.in. (784 cu.cm) | p. 25 |
| Rated Output / Engine Speed | 11.5 HP/2000 rpm | p. 25 |
Yanmar ViO10 (EP) Common Problems This Manual Covers
Yanmar ViO10 EP weak travel or one-track tracking under load, machine slips excessively on a slope p. 333
Inspect the crawler tension and verify the adjustment (H) is between 0.31 to 0.51 in. (8 to 13 mm) as shown on page 266. Check the sprocket for wear exceeding the 0.47 in. (12 mm) limit on page 42. Replace worn drive components and retest track pull.
Manual Section: 10) TroubleshootingHydraulic functions feel slow, weak, or inconsistent with insufficient flow volume after service or overheating p. 92
Measure the system relief set pressure P1 and P2 to ensure it reaches 2986 PSI (20.6 MPa) as specified on page 22. Warm the hydraulic oil to a measuring condition of 122 to 140 °F (50 to 60 °C) on page 33 before testing. Drain and refill the tank to its 3.88 Gals (14.7 L) capacity.
Manual Section: 5) Hydraulic SystemElectrical display, monitor lamps, and warning buzzer intermittently fail or short out during operation p. 250
Test the safety relay insulation resistance on page 248 to verify it meets the 100 MΩ standard. Inspect the wiring diagram on page 250 for pinched harness routes. Measure the alternator regulation voltage to confirm a steady 14 to 15 V output as listed on page 27.
Manual Section: Wiring DiagramHeavy hydraulic fluid leaks around cylinder seals, rubber hoses, and fittings under static load p. 125
Inspect the pilot valve for oil leaks exceeding 1.22 cu.in. (20 cu.cm) per minute as noted on page 185. Torque the boom cylinder U-nut to exactly 217.0 to 253.2 ft•lbf (294 to 343 N•m) on page 44. Replace any high pressure rubber hose failing the 2489 PSI (17.2 MPa) rating.
Manual Section: 6) Hydraulic EquipmentFrequently Asked Questions
What are the torque specifications for the YANMAR ViO10 (EP) track motor bolts?
The tightening torque for the seven hexagon socket head bolts (part 28) that fasten the valve body to the motor in the hydraulic motor section of the travel motor is 20.3 to 22.4 ft·lbf (27.5 to 30.4 N·m). This procedure is part of the reassembly of the motor section.
What are the replacement specifications for Hydraulic seals?
When replacing hydraulic seals, it is crucial to use new seals for reassembly. For storing, seals should be kept in their packages in a dark, cool place under 104°F (40°C) to prevent distortion, allowing them to be stored for four or five years. During installation, O-rings should be lubricated with clean grease or hydraulic oil, handled carefully to avoid damage or distortion, and not stretched permanently.
What are the replacement specifications for Hydraulic hoses?
Yanmar Construction Machinery uses two types of hydraulic hoses: standard parts specified in Yanmar Industrial Standards (YIS) and special parts for specific models. Specifications like hose material, type, diameter, length, and working pressure (e.g., 2489 PSI for SAE J517, 100R1, 02 hose dia.) are detailed by code number or part descriptions. When installing, ensure hoses are not twisted, use two wrenches for metal fittings, and tighten to specified torque.
What is the engine oil capacity for the YANMAR ViO10 (EP)?
The engine oil capacity for the YANMAR ViO10 (EP) is 3.2 quarts (3.0 liters) for the engine oil pan. The recommended engine oil type is SAE10W30, CD class.
How will I receive this Service Manual?
Instant PDF download. You get the full 372-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print specific sections of this Service Manual?
Yes — no copy protection at all. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Are hydraulic system diagrams in this Yanmar ViO10 (EP) Service Manual?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
Document Quality
This is a scanned PDF document with an OCR layer, allowing you to search and copy text throughout. The OCR-processed text is generally crisp and readable, though some original text within diagrams may show minor scanning artifacts. Diagrams and illustrations are raster images, appearing clear at normal viewing but pixelated when zoomed in, with labels remaining mostly readable. Pages are clean with no major stains, but some exhibit slight skewing and minor speckles from the scanning process. Note that there are several blank pages used as section breaks or filler.
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