Model Variant:
3-cylinder TNV series industrial diesel engine
Production Years Covered:
Varies by engine serial number; see manual for applicable range
Engine Type:
Vertical, water-cooled, 4-stroke diesel
Combustion System:
Direct injection
Aspiration:
Naturally aspirated
Target Audience:
Technicians and DIY owners servicing Yanmar 3TNM68 and 3TNM72 engines
Application:
Industrial, agricultural, and construction equipment
Competitive Advantage:
Compact 3-cylinder design with high power density and fuel efficiency
Design:
Compact and lightweight for tight installations
Durability:
Robust construction for continuous heavy-duty operation
Emissions:
Compliant with applicable emission standards for its era
System Coverage:
Complete engine operation, maintenance, and troubleshooting
Engine Models:
3TNM68, 3TNM72
Procedures:
Operation, periodic maintenance, adjustments, and diagnostics
Manual Type:
Operation Manual
Delivery:
Instant download
Page Count:
N/A - not specified in source data
Lubrication System:
Oil pump, filter, and oil flow circuits
Cooling System:
Water pump, thermostat, radiator, and coolant flow
Fuel System:
Fuel injection pump, injectors, and fuel lines
Intake and Exhaust:
Air cleaner, intake manifold, exhaust manifold
Electrical System:
Starting system, charging system, and sensors
Governor System:
Mechanical governor operation and adjustment
Operation:
Starting, stopping, and normal operating procedures
Maintenance:
Scheduled service tasks and intervals
Adjustments:
Valve clearance, injection timing, and belt tension
Troubleshooting:
Diagnostic charts for common engine problems
Disassembly and Assembly:
Component removal, inspection, and installation
Specifications:
Torque values, clearances, and wear limits
Diagrams:
Exploded views and system schematics
Part Numbers:
Reference to genuine Yanmar parts
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
Engine Type:
3-cylinder, 4-stroke diesel
Displacement:
0.854 L (854 cc)
Bore x Stroke:
72 mm x 70 mm
Power Output:
Approx. 10.2 kW (13.7 hp) at 2400 rpm
Fuel System:
Direct injection
Engine Type:
3-cylinder, 4-stroke diesel
Displacement:
0.904 L (904 cc)
Bore x Stroke:
74 mm x 70 mm
Power Output:
Approx. 11.2 kW (15.0 hp) at 2400 rpm
Fuel System:
Direct injection
Oil Change:
Every 250 hours or 6 months, whichever comes first
Oil Filter:
Replace every 500 hours or 12 months
Fuel Filter:
Replace every 500 hours or 12 months
Air Filter:
Clean every 100 hours, replace as needed
Valve Clearance:
Check/adjust every 1000 hours
Engine Oil:
API CF or higher, SAE 10W-30 (refer to manual for temperature ranges)
Coolant:
Ethylene glycol based, 50/50 mix
Fuel:
Diesel fuel, cetane number 45 or higher
Common Wear Items:
Fuel injectors, water pump, belts, and hoses
Typical Issues:
Injector clogging, cooling system leaks, and governor wear
