Manufacturer:
Hino Motors Ltd.
Engine Family:
Hino WO series marine diesel
Model Variant:
WO6D-TI-II
Engine Type:
Six-cylinder, four-stroke, water-cooled marine diesel
Aspiration:
Turbocharged and intercooled (TI designation)
Application:
Marine propulsion and auxiliary duty
Production Years Covered:
N/A - specific production year range not stated in the manual
Target Audience:
Marine engineers, boat owners, fleet mechanics and service technicians
Market Position:
Heavy-duty marine diesel platform for commercial and recreational vessels requiring continuous-duty reliability
Key Advantage:
Straight-six turbo-intercooled design combines high torque output with fuel efficiency and long service life in saltwater and continuous-load environments
Manual Purpose:
Definitive guide for maintenance, repair and servicing, including procedures, specifications and troubleshooting
Engine Mechanical:
Cylinder head, block, pistons, rings, liners, crankshaft, bearings, camshaft and valve train
Fuel System:
Injection pump, injectors, fuel lines, filtration and governor
Turbocharger System:
Turbocharger, intercooler, wastegate/boost control and associated piping
Cooling System:
Raw water pump, freshwater pump, heat exchanger, thermostat and coolant circuits
Lubrication System:
Oil pump, oil cooler, filters, galleries and pressure relief
Electrical System:
Starting, charging, alternator, starter motor and instrumentation
Marine Gear Interface:
Bell housing, coupling and engine-to-gearbox mounting
Exhaust System:
Manifold, riser, mixing elbow and exhaust routing
Diagnostic Procedures:
Fault finding by symptom and system, with test values and checks
Disassembly and Reassembly:
Step-by-step teardown and rebuild procedures with torque sequences
Adjustment and Tuning:
Valve clearance, injection timing and governor adjustment
Testing:
Compression testing, oil pressure testing and cooling system pressure testing
Scheduled Maintenance:
Inspection, cleaning, lubrication and replacement tasks
Troubleshooting:
Cause-and-correction tables for starting, running, overheating and smoke faults
Technical Depth:
Component-level service data, tolerances and wear limits
Illustrations:
Exploded diagrams, cutaways and assembly drawings
Parts Information:
Part identification and component inspection criteria for replacement
Safety Information:
Warnings, cautions and safe working practices for marine diesel service
Specifications:
Torque values, clearances, capacities and pressures
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Configuration:
Inline six-cylinder, four-stroke diesel
Cooling:
Water-cooled with heat exchanger and raw water circuit
Aspiration:
Turbocharged with intercooler
Valve Train:
Overhead valve, pushrod actuated
Combustion Chamber:
Direct injection
Fuel System:
Mechanical inline fuel injection pump with governor
Rated Output:
N/A - specific rating varies by marine rating class and is not stated in the manual
Rated Speed:
N/A - governed speed set by application rating
Displacement:
N/A - exact displacement not specified in the supplied description
Bore and Stroke:
N/A - not specified in the supplied description
Standard:
Marine reduction gearbox mounted to the engine bell housing
Optional:
N/A - transmission matched separately to the vessel by the boat builder
Clutch Type:
Hydraulic or mechanical marine gear clutch depending on the reduction gear fitted
Control:
Single-lever or twin-lever remote control at the helm
Output Flange:
Splined or bolted output coupling to the propeller shaft
Configuration:
Inline six-cylinder marine diesel
Length:
N/A - overall dimensions not specified in the supplied description
Width:
N/A - not specified for this engine
Height:
N/A - not specified for this engine
Dry Weight:
N/A - exact dry weight not stated in the manual
Mounting:
Flexible marine engine mounts to hull bearers
Engine Protection:
Low oil pressure and high coolant temperature shutdown/alarm circuits
Overheat Protection:
Coolant temperature sender and alarm circuit
Overspeed Protection:
Governor limits maximum engine speed
Electrical Protection:
Fuses and circuit protection in the engine harness
Crash Test Ratings:
N/A - not applicable to a marine diesel engine
Manual Safety Content:
Warnings and cautions for handling fuel, coolant, hot surfaces and rotating components
Lifting:
Approved lifting points and slinging procedures for engine removal
Engine Management and Monitoring
Fuel Delivery:
Mechanical injection pump with centrifugal governor
Turbocharging:
Exhaust-driven turbocharger with intercooler for charge-air cooling
Instrumentation:
Tachometer, hour meter, oil pressure, coolant temperature and voltmeter gauges
Alarm System:
Audible and visual alarms for low oil pressure and high coolant temperature
Starting System:
Electric starter with battery charging alternator
Oil and Filter:
Engine oil and oil filter changed at regular running-hour intervals
Fuel Filters:
Primary and secondary fuel filters replaced at scheduled intervals
Air Cleaner:
Air filter element inspected and cleaned or replaced as needed
Cooling System:
Coolant condition, heat exchanger and raw water pump impeller checked regularly
Valve Clearance:
Checked and adjusted at scheduled running-hour intervals
Injection System:
Injector service and injection timing checks as specified
Engine Oil:
Heavy-duty diesel engine oil as recommended for the ambient temperature range
Coolant:
Ethylene glycol coolant mixture with corrosion inhibitor for marine engines
Fuel:
Clean diesel fuel per the fuel injection equipment specification
Common Wear Items:
Raw water pump impeller, belts, hoses, filters, injector nozzles and turbocharger bearings
Service Notes:
Refer to the troubleshooting section for symptom-based diagnosis of starting, smoke, overheating and power-loss complaints
Manufacturer Heritage:
Hino Motors is a Japanese manufacturer of diesel engines and commercial vehicles, part of the Toyota Group
Engine Heritage:
Hino WO-series diesels were developed for heavy-duty commercial and marine duty
Model Evolution:
The WO6D-TI-II is a refined variant of the WO6D-TI with updated specification
Production Location:
N/A - specific plant of manufacture not stated in the manual
Production Years:
N/A - exact production run not specified in the supplied description
