Maeda MK0003, Service Manual, Page: 61 / 348

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4. ENGINE ASSEMBLY
4.1 ENGINE SPECIFICATIONS
Engine name 2TNV70-NMBA
Applicable emission control EPA Tier4 voluntary restraint
Engine type Vertical in-line water-cooled 4 stroke diesel engine (special swirl type)
Number of cylinders - Bore x Stroke 2 -

70 mm

74 mm
Total stroke volume 569 cm
3
Compression ratio 23
Rated output (Net, output tolerance: ±3%)
7.4 kW/2500 min
-1
(10.1 PS/2500 min
-1
)
(engine name plate display, no output display)
Maximum torque 31.5 - 34.4 N-m/1800 min
-1
(3.2 - 3.5 kgf-m/1800 min
-1
)
Rate of fuel consumption ≤ 288 g/kWh ( ≤ 212 g/PSh)
Atmospheric condition
Room temperature 298K (25 ˚ C), Atmospheric pressure 100 kPa (750 mmHg),
Relative humidity 30%
Engine speed at no load Maximum: 2675 (±25) min
-1
, Minimum: 1250 (±25) min
-1
Coefficient of speed fluctuation Momentary: ≤ 12%, Steady state: ≤ 7%
Setting time ≤ 6s
Rotational fluctuation ≤ 30 min
-1
Allowable inclination angle Continuous 25 degrees (all sides), momentary 30 degrees (all sides)
Engine rotation direction Left rotation (viewed from the flywheel side)
Lubricating oil used Engine oil SD or higher class SAE30 (when cold SAE20)
Dry mass 84 (+0/5) kg
Fuel
system
Fuel used JIS K2204 No.2 light oil
Fuel injection pump Bosch integral in-line type (YPES-ML type) integral with speed governor
Filtration system Full-flow filtration system (integral with water trap)
Governor Centrifugal all-speed type
Lubrication
system
Lubricating oil used CD class of new SAE classification 10W30
Lubricating oil pump Trochoid pump
Filtration system Forced-feed lubrication
Cooling
system
Cooling method Radiator cooling
Radiator Pressurized sealed system, aluminum radiator
Fan
φ 270-5 blade (suction) fan spacer T = 30
Crank pulley/fan pulley =

110/90
Air cleaner Cyclone type (resin 4 inch)
Start system Electric type
Starter 12V-1.4kW
Generator 12V-20A
Battery
55B24
Start assist device Glow plug (Super quick glow plug)
Stop device Built-in governor made by Stop Solenoid Synchrostart 12V (waterproof)
Coolant capacity Engine 0.6L (engine only)
Lubricating oil quantity Total quantity 2.2L, effective quantity 1L (oil pan only)
Engine paint color Yanmar black