Part of the Yanmar Repair Manuals.
An error code on the ViO80-1A's monitor can park a whole crew while you guess at what the machine is trying to say. This service manual is where you run it down: the Electric System section lists the codes for both the engine and hydraulic ECUs, and the Troubleshooting chapter's quick reference table points you at the circuit or component behind them.
Across 719 pages, Yanmar publication 0BKB3-G00200 walks the machine end to end: the 4TNV98C-WBV diesel with its fuel, cooling, lubrication, and electronic control systems, then the hydraulic pump, control valve, pilot valves, swing motor, and travel motor, and finally undercarriage, swing bearing, implement, cabin, and air conditioner work in the Adjustment and Repair chapter. Service Standards and Technical Data supply the wear limits, pressures, and tightening torques to measure against.
Buy it once and it is yours: a searchable, printable PDF for the shop, the laptop, and the cab.
What's Inside This Yanmar ViO80-1A Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 13-24 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment, Cautions for Handling Seals |
| Technical Data | 25-52 | Specifications, Outline Drawing and Working Area (W/O Quick Coupler), Weight List of Main Parts, Lifting Capacity List (W/O Quick Coupler), Specifications for Attachment |
| Service Standards | 53-80 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 81-240 | 4-1 Safety, 4-2 Engine, 4-3 Fuel System, 4-4 Cooling System, 4-5 Lubrication System, 4-6 Starter Motor, 4-7 Alternator, 4-8 Electronic Control System |
| Electric System | 241-294 | 5-1 Electric Equipment of Machine, 5-2 Circuit Description of Engine Start and Stop, 5-3 Engine ECU (Engine Controller), 5-4 Hydraulic ECU (Controller), 5-5 Error Code |
| Hydraulic System | 295-566 | 6-1 Outline, 6-2 Circuit Operation, 6-3 Hydraulic Pump, 6-4 Control Valve, 6-5 Pilot Valve, 6-6 Swing Motor, 6-7 Travel Motor, 6-8 Ess Proportional Solenoid Valve |
| Adjustment and Repair | 567-706 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Implement, 7-7 Cabin, 7-8 Air Conditioner |
| Troubleshooting | 707-716 | 8-1 Non-Breakdowns, 8-2 Quick Reference Table for Troubleshooting |
| Appendix | 717-719 | ViO80-1A (Ycee) Wiring Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Track roller mounting bolts (M20 × 40) | 325.4 to 361.6 ft•lbf (441.2 to 490.2 N•m) | p. 70 |
| Travel motor × Track frame mounting bolts (M16 × 45) | 123.2 to 151.9 ft•lbf (167 to 206 N•m) | p. 70 |
| Idler seal cover × Crawler adjust spring mounting bolts (M14 × 60) | 87.0 to 108.4 ft•lbf (118 to 147 N•m) | p. 70 |
| Fuel filter element replacement interval | Every 250 hrs | p. 38 |
| Fuel filter filtration area | 310 sq.in. (2000 sq.cm) | p. 30 |
| Suction filter cleaning interval | Every 1000 hrs | p. 38 |
| Return filter replacement interval | Every 1000 hrs | p. 38 |
| Air cleaner cleaning interval | Every 250 hrs | p. 38 |
| Air cleaner element replacement interval | Every 500 hrs | p. 38 |
| Radiator fins cleaning interval | Every 250 hrs | p. 38 |
| Radiator cap pressure | 12.80 PSI (0.09 MPa) | p. 31 |
| Grease-up positions check and grease interval | Daily | p. 38 |
Yanmar ViO80-1A Common Problems This Manual Covers
Cranks but will not start
Air in the fuel lines, a starved filter, or a starting circuit fault will leave the 4TNV98C-WBV turning over with nothing happening. The Engine chapter covers the fuel system, starter motor, and electronic control system so you can work through delivery and cranking faults in order instead of swapping parts.
Manual Section: Engine p. 81Weak digging and slow cycle times
When the bucket stalls in a pile it used to walk through, the usual suspects are a tired pump, sticking control valve spools, or main relief pressure that has drifted low. The Hydraulic System chapter covers circuit operation, the pump, control valve, and pilot valve in detail.
Manual Section: Hydraulic System p. 295Error code with no explanation
The monitor shows a code, the machine derates, and the crew stands around. The Electric System chapter includes the error code listing plus circuit descriptions for the engine ECU and hydraulic ECU, so you can trace the fault instead of clearing it and hoping.
Manual Section: Electric System p. 241Boom or arm drifts under load
A raised boom that settles on its own points to cylinder seal wear or leakage in the control valve. The Adjustment and Repair chapter covers hydraulic equipment and implement work, including the cylinder repairs that put holding power back.
Manual Section: Adjustment and Repair p. 567Loose tracks and undercarriage wear
Undercarriage eats money quietly until a track starts walking off the idler. Service Standards gives wear limits for both rubber and steel crawler specifications, so you can measure rollers, idlers, and track components and decide what is actually done rather than guessing by eye.
Manual Section: Service Standards p. 53Running hot on long days
Coolant temperature creeping up usually traces to plugged radiator fins, a lazy thermostat, or other cooling system faults. The Engine chapter's cooling system coverage walks inspection and repair of the circuit that keeps this excavator working through a full shift.
Manual Section: Engine p. 81Frequently Asked Questions
Which machine does this manual cover?
It covers the Yanmar ViO80-1A (YCEE) excavator with the 4TNV98C-WBV diesel engine. It is Yanmar service publication 0BKB3-G00200, written for shop-level diagnosis and repair rather than daily operation.
Does it explain the error codes on the display?
Yes. The Electric System chapter includes an error code section along with circuit descriptions for engine start and stop, the engine ECU, and the hydraulic ECU, so you can trace a code back to the circuit or component that set it. p. 241
Are torque specs and wear limits included?
Yes. The Service Standards chapter carries tightening torque figures for the machine and engine — track roller mounting bolts at 441.2 to 490.2 N·m and travel motor to track frame bolts at 167 to 206 N·m, both on page 70 — along with wear limits for the undercarriage in both rubber and steel crawler specifications. p. 53
Is there a wiring diagram?
Yes. The Appendix contains the ViO80-1A (YCEE) wiring diagram, and the Hydraulic System chapter covers circuit operation for tracing the oil side of a fault. p. 717
How will I receive this Service Manual?
Immediate download of the complete 719-page searchable Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this manual?
There are no print restrictions. The PDF is DRM-free — print whatever sections you need for the shop. Standard letter or A4 paper works.
Are there hydraulic schematics in this Yanmar ViO80-1A manual?
Not as a separate schematic sheet. The diagram this manual carries is the ViO80-1A (YCEE) wiring diagram in the Appendix. The hydraulic side is documented as circuit operation and component coverage — pump, control valve, pilot valve, swing motor and travel motor — rather than as a standalone hydraulic circuit drawing.
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