Part of the Yanmar Repair Manuals.
Air trapped in the pump after a hose change will make a ViO75 groan under load, and the fix is a specific bleeder procedure, not more cranking. This Yanmar ViO75 (ViG3 series) excavator service manual settles that kind of question with factory procedures for the hydraulic system, control valves, piston and gear pumps, travel and swing motors, and the 4TNE98-EBVA diesel engine.
Service Standards chapters set wear limits for rubber and steel crawler undercarriages, hydraulic cylinders, and front attachment pins, so you can measure a worn part and know whether it stays or goes. Technical Data adds full specifications, weights of main parts, and lifting capacities for standard and long arm machines.
The full 556-page book travels as one PDF on a phone or laptop, so the answer is wherever the machine stopped, in the cab or beside the track frame. A crew waiting on parts is bad enough; waiting on information is optional.
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 |
|---|---|---|
| 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
Weak hydraulics after opening the circuit
A boom that drifts or a pump that groans after hose or cylinder work usually means trapped air, not a failed pump. The manual's procedure is to loosen the air bleeder valve on the hydraulic pump after reassembly and release air until oil drops out.
Manual Section: Air Release of Hydraulic EquipmentTrack tension out of adjustment
Loose tracks walk off the idler and hammer the sprocket; overtight tracks load the rollers and final drives. The Undercarriage section of Service Standards lists wear limits for both rubber and steel crawler setups, so you can judge what to adjust and what to replace.
Manual Section: UndercarriageCracked and leaking hydraulic hoses
Vibration and age dry out hose covers until fittings weep and clamps loosen, and a burst line parks the machine. The manual covers hose specifications, correct routing and installation, and the cautions for opening hydraulic piping without dragging dirt into the circuit.
Manual Section: Correct Installation of Hydraulic HoseOverheating from a clogged cooling package
Debris packed into the cooling fins pushes temperatures up long before any component actually fails. The Engine section covers the cooling water pump components and the lubrication system, so you can inspect and rebuild the pump itself once the radiator is clean.
Manual Section: EngineSluggish swing or soft pilot response
When the swing lags or a control feels dead through the pilot levers, the fault can sit in the pilot valve, the control valve, or the swing motor itself. The Hydraulic Control Schematic section maps the piston pump, gear pump, pilot valve, control valve, and travel and swing motors so you can trace the circuit instead of swapping parts.
Manual Section: Hydraulic Control SchematicWorn bucket pins and bushings
Slop at the bucket shows up as banging and sloppy grading long before a pin breaks. The Front Attachments standards give an allowable pin and bushing bore clearance of 0.04 in. (1.0 mm), so a caliper tells you whether to rebush or keep working.
Manual Section: Front AttachmentsFrequently Asked Questions
Which machines and engine does this manual cover?
It covers the Yanmar ViO75 excavator, ViG3 series, with the 4TNE98-EBVA diesel engine, in cabin type with standard arm and long arm configurations. Coverage spans the engine, hydraulic system, undercarriage, controls, and front attachments across 556 pages.
What hydraulic oil does the ViO75 take, and how much?
The manual specifies ISO VG46 hydraulic oil, with 15.05 gallons (57 L) in the tank and another 11.35 gallons (43 L) in the rest of the system. The standard change interval is every 1000 hours or one year. p. 516
How do I bleed air from the hydraulic system after repairs?
After reassembly, loosen the air bleeder valve on the hydraulic pump and release air until oil drops out. The Air Release of Hydraulic Equipment section walks through the procedure, and the manual also gives the bleeder valve tightening torque. p. 461
Does it cover both rubber and steel crawler undercarriages?
Yes. The Service Standards chapter has separate Rubber Crawler Specifications and Steel Crawler Specifications sections, plus common specifications for both, including wear limits, so it applies whichever tracks your ViO75 runs.
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 manual?
Yes. This manual includes wiring diagrams for the electrical system.
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