Pulling this Yanmar ViO75, ViG3 service manual PDF into the shop gives you 556 pages of unedited factory repair data for your excavator. Inside, you get complete hydraulic circuit schematics showing exactly how the piston and gear pumps route fluid to the travel and swing motors. Flip through detailed wiring diagrams, heavy-duty undercarriage rebuilds, and extensive troubleshooting charts designed to help you isolate pilot valve faults fast. When bleeding the system, loosen the valve until oil drops, then secure it to a precise 6.7 N-m torque before topping off the 57-liter ISO VG46 tank. Stop wasting hours trying to diagnose pressure loss blindly. This bookmarked digital download lets you jump straight to the right spec on your tablet, find the actual factory answer, and get your machine digging again.
What's Inside This Yanmar ViO75, ViG3 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | - | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | - | Specifications, Outline Drawing and Working Area (Cabin Type), Weight List of Main Parts, Lifting Capacity List (Standard Arm Type, Long Arm Type) |
| Service Standards | - | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | - | Cylinder Head, Gear Train and Camshaft, Lubrication System, Cooling Water Pump Components, Fuel Injection Pump, Governor |
| Hydraulic System | - | Control Valve Operation, Hydraulic Circuit Schematic, Boom, Arm, Bucket, Swing |
| Hydraulic Control Schematic | - | Piston Pump, Gear Pump, Pilot Valve, Control Valve, Travel Motor, Swing Motor |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic pump air bleeding procedure | Loosen the air bleeder valve of the hydraulic pump to release air until the oil drops. | p. 461 |
| Bleeder valve tightening torque | 3.61 to 5.06 ft·lbf (4.9 to 6.7 N·m) | p. 19 |
| Hydraulic oil tank piping tightening torque | 3.62 to 4.34 ft·lbf (4.9 to 5.9 N·m) | p. 483 |
| Hydraulic oil type | ISO VG46 | p. 516 |
| Hydraulic oil amount (in the tank) | 15.05 Gals. (57 L) | p. 516 |
| LO filter type | Full Flow filter | p. 26 |
| LO pressure regulating valve opening pressure | 42.7 to 56.9 (0.29 to 0.39) PSI (MPa) | p. 26 |
| Air cleaner type | Cyclone type | p. 26 |
| Fuel filter type | Filter paper with automatic air release device | p. 26 |
| Grease type | Multipurpose grease | p. 516 |
| Front attachments pin/bush bore wear limit | 0.04 in. (1.0 mm) | p. 49 |
| Battery remaining charge (specific gravity 1.060) | 0 % | p. 77 |
Yanmar ViO75, ViG3 Common Problems This Manual Covers
Yanmar ViO75 and ViG3 hydraulic pump making abnormal noise and system feels weak after startup p. 461
Loosen the air bleeder valve of the hydraulic pump to release air until the oil drops, following the procedure on page 461. Verify the tank holds 15.05 Gals. (57 L) of ISO VG46 fluid. Torque the bleeder valve to 3.61 to 5.06 ft·lbf (4.9 to 6.7 N·m) when finished.
Manual Section: Hydraulic Pump TroubleshootingRubber tracks feel loose during operation and jump off the front idler when turning on hard dirt p. 432
Measure the clearance H at the center track roller. Adjust the grease cylinder to maintain a rubber crawler tension clearance of 0.8 to 1.0 in. (20 to 25 mm) as shown on page 432. Inspect the rubber crawler for damage exceeding the 1.18 (30) (mm) wear limit.
Manual Section: General Engine, Hydraulic, Electrical Troubleshooting ChartsEngine temperature gauge spikes into the red zone and coolant boils over during heavy trenching p. 65
Test the radiator cap using a manual pump as detailed on page 65 to confirm it holds 10.7 to 14.9 PSI (73.6 to 103.0 kPa). Inspect the fan belt and adjust tension to achieve a standard deflection of 0.39 to 0.59 in. (10 to 15 mm).
Manual Section: Engine Troubleshooting (Quick Reference Table)Engine does not start and starter motor clicks rapidly when turning the key in cold weather p. 73
Measure the battery voltage with a multimeter to verify it outputs 12 V. Test the electrolyte specific gravity; a reading of 1.060 means 0 % remaining charge according to page 73. Replace the 130E41R-MF battery if it cannot sustain a load during cranking.
Manual Section: Starting Motor TroubleshootingFrequently Asked Questions
What are the torque specifications for the engine bolts on a Yanmar ViO75 excavator?
For the Yanmar ViO75, the tightening torque for the flywheel bolts (M14) on the crankshaft is 137.3 to 151.8 ft-lbf (186.2 to 205.8 N·m). For engine mounting hooks (M6) on the cylinder head, the torque is 5.1 to 6.5 ft-lbf (6.9 to 8.8 N·m).
How do I reset the hydraulic system pressure on a Yanmar ViO75 excavator?
To adjust the hydraulic system pressure on a Yanmar ViO75, extend or retract the cylinder to its stroke end, hold the lever, and read the gauge. Increase the system relief valve and circuit relief valve pressure by turns, then lock the adjust screw when the specified pressure is reached. The system relief valve pressure changes by 2588.1 (17.8) PSI (MPa) per 1/1 turn.
What are the torque specifications for the track rollers on a Yanmar ViO75 excavator?
For the Yanmar ViO75, the tightening torque for the track roller shoe bolt (M14 × 1.5) is 162.8 to 198.9 ft-lbf (221 to 270 N·m). This specification is found in the disassembly and reassembly instructions for the track roller.
What is the engine oil capacity for the Yanmar ViO75 excavator?
The engine oil capacity for the Yanmar ViO75 excavator's oil pan is 10.78 Qts. (10.2 L). This information is crucial for proper maintenance and refilling.
What format is this manual in?
This is a 556-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 Service Manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there wiring harness diagrams in this Yanmar ViO75, ViG3 manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Yanmar ViO75, ViG3.
Document Quality
This document is a scanned PDF with an OCR text layer, allowing you to search and copy text throughout. While the main body text is generally clear, some sections and especially older diagrams show typical scanning artifacts like slight blurring or broken characters, though labels remain readable. The diagrams and illustrations are raster images, not vector, so they may show some pixelation when zoomed in. Pages are mostly clean, but minor scan artifacts such as faint lines or speckles are occasionally present. All pages contain content.
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