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Yanmar 3TNV76 Engine

General Technical Data

Yanmar 3TNV76 Engine Specifications

Engine Model ......... Yanmar 3TNV76
Type ......... Vertical Inline, 3-Cylinder Indirect Injection Diesel
Aspiration ......... Natural
Number of Cylinders ......... 3
Engine Bore, in (mm) ......... 2.99 (76.0)
Engine Stroke, in (mm) ......... 3.23 (82.0)
Displacement, cu.in (L) ......... 68.03 (1.115)
Maximum Engine Power, hp (kW) ......... 22.4 (17.9)
Maximum Engine Speed, rpm ......... 3000
High Idle Speed, rpm ......... 3210±25
Firing Order ......... 1-3-2
Compression Ratio ......... 23.5
Direction of Rotation ......... Counterclockwise (Viewed From Flywheel Side)
Intake/Exhaust Valve Gap, in (mm) ......... 0.006-0.010 (0.15-0.25)
Air Cleaner ......... Replaceable, Paper Elements

Fuel System

Fuel Injection Pump ......... Mechanical, In-line type
Fuel Filter ......... Replaceable Element
Fuel Injection Pressure, psi (MPa) ......... 1711-1842 (11.8-12.8)
Combustion System ......... Ball Type Swirl Chamber
Injection Timing (BTDC), deg ......... 18
Fuel injector opening pressure, psi (MPa) ......... 72.5 (0.5)

Lubrication System

Lubricating System ......... Forced Lubrication With Trochoid Pump
Oil Filter ......... Spin On Filter
Normal Oil Pressure at Rated Speed, psi (MPa) ......... 42-64 (0.29-0.44)
Normal Oil Pressure at Low Idle Speed, psi (MPa) ......... 8.5 (0.06)
Engine Oil Pan Capacity, qt (L) ......... 3.6 (3.4)

Cooling System

Cooling System ......... Liquid-Cooled With Radiator
Cooling System Capacity, qt (L) ......... 5.2 (5.0)
Standard Cooling Fan ......... 6 Blades, Pusher Type
Cooling Fan Diameter, in (mm) ......... 13.2 (335)
Fan Pulley Diameter, in (mm) ......... 3.9 (100)
Crank Pulley Diameter, in (mm) ......... 4.3 (110)
Thermostat Opening Temperature ......... 157-163F (70-73C)
Full Opening Lift Temperature ......... 185F (85C)

Electrical System

Electrical System Rating, Volts ......... 12
Charging System ......... Alternator
Alternator Rating, Amps ......... DC12V, 40A
Starting System ......... Electric Starting
Starter Motor ......... DC12V, 1.5 hp (1.1 kW)
Battery Capacity ......... 12V, 36 Amp-Hour

Dimensions

Width, in (mm) .......... 17.17 (436)
Height, in (mm) .......... 21.06 (535)
Depth, in (mm) .......... 19.09 (485)
Weight, lbs (kg) .......... 245 (110)

Yanmar 3TNV76 Maintenance Data

Engine oil type .......... SAE 10W-40/5W-30
Engine oil capacity, qt (L) .......... 3.6 (3.4)
Coolant capacity, qt (L) .......... 5.2 (5.0)
Oil filter change interval .......... Every 250 hours
Oil change interval .......... Every 250 hours
Fuel filter change interval .......... Every 500 hours

Yanmar 3TNV76 Service Specifications

Cylinder Head and Valves

Cylinder Head Surface Flatness (Std), in (mm) ......... 0.0020 (0.05)
Cylinder Head Surface Flatness (Wear Limit), in (mm) ......... 0.0059 (0.15)
Valve Clearance (Intake and Exhaust), in (mm) ......... 0.006-0.010 (0.15-0.25)
Valve Recession (Std), in (mm) ......... 0.0157-0.0236 (0.4-0.6)
Valve Recession (Wear Limit), in (mm) ......... 0.0354 (0.9)
Intake Valve Seat Angle, deg ......... 120
Exhaust Valve Seat Angle, deg ......... 90
Valve Seat Angle Correction, deg ......... 40, 150
Intake Guideside Diameter (Std), in (mm) ......... 0.2362-0.2367 (6.000-6.012)
Intake Guideside Diameter (Wear Limit), in (mm) ......... 0.2394 (6.08)
Intake Valve Stem Outside Diameter (Std), in (mm) ......... 0.2346-0.2352 (5.960-5.975)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) ......... 0.2323 (5.90)
Intake Valve Clearance (Std), in (mm) ......... 0.0010-0.0020 (0.025-0.052)
Intake Valve Clearance (Wear Limit), in (mm) ......... 0.0063 (0.15)
Intake Valve Stem Bend, in (mm) ......... 0.0004 (0.010)
Exhaust Guideside Diameter (Std), in (mm) ......... 0.2362-0.2367 (6.000-6.012)
Exhaust Guideside Diameter (Wear Limit), in (mm) ......... 0.2394 (6.08)
Exhaust Valve Stem Outside Diameter (Std), in (mm) ......... 0.2341-0.2346 (5.945-5.960)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) ......... 0.2323 (5.90)
Exhaust Valve Clearance (Std), in (mm) ......... 0.0016-0.0026 (0.040-0.067)
Exhaust Valve Clearance (Wear Limit), in (mm) ......... 0.0067 (0.17)
Exhaust Valve Stem Bend, in (mm) ......... 0.0004 (0.010)
Push Rod Bend, in (mm) ......... 0.0012 (0.03)
Valve Spring Free Length, in (mm) ......... 1.4882 (37.8)
Rocker Arm Shaft Hole Diameter, in (mm) ......... 0.4724-0.4732 (12.000-12.020)
Rocker Arm Shaft Outside Diameter, in (mm) ......... 0.4711-0.4718 (11.966-11.984)
Rocker Arm Shaft Clearance, in (mm) ......... 0.0006-0.0021 (0.016-0.054)

Cylinder Block

Cylinderside Diameter (Std), in (mm) ......... 2.9925-2.9929 (76.010-76.020)
Cylinderside Diameter (Wear Limit), in (mm) ......... 3.0000 (76.200)
Cylinder Bore Ovality (Std), in (mm) ......... 0.0004 (0.01)
Cylinder Bore Ovality (Wear Limit), in (mm) ......... 0.0012 (0.03)
Tappet Bore (Cylinder Block)side Diameter (Std), in (mm) ......... 0.8268-0.8276 (21.000-21.021)
Tappet Bore (Cylinder Block)side Diameter (Wear Limit), in (mm) ......... 0.8284 (21.041)
Tappet Stem Outside Diameter (Std), in (mm) ......... 0.8239-0.8252 (20.927-20.960)
Tappet Stem Outside Diameter (Wear Limit), in (mm) ......... 0.8231 (20.907)
Tappet Clearance (Std), in (mm) ......... 0.0016-0.0037 (0.040-0.094)
Tappet Clearance (Wear Limit), in (mm) ......... 0.0053 (0.134)

Camshaft

Camshaft End Play, in (mm) ......... 0.0020-0.0059 (0.05-0.15)
Camshaft Bend, in (mm) ......... 0-0.0008 (0-0.02)
Cam Lobe Height, in (mm) ......... 1.3439-1.3490 (34.135-34.265)
Bushingside Diameter (Gear End), in (mm) ......... 1.5748-1.5778 (40.000-40.075)
Camshaft Outside Diameter (Gear End), in (mm) ......... 1.5724-1.5732 (39.940-39.960)
Camshaft Oil Clearance (Gear End), in (mm) ......... 0.0016-0.0053 (0.040-0.135)
Bushingside Diameter (Intermediate), in (mm) ......... 1.5748-1.5758 (40.000-40.025)
Camshaft Outside Diameter (Intermediate), in (mm) ......... 1.5713-1.5722 (39.910-39.935)
Camshaft Oil Clearance (Intermediate), in (mm) ......... 0.0026-0.0045 (0.065-0.115)
Bushingside Diameter (Flywheel End), in (mm) ......... 1.5748-1.5758 (40.000-40.025)
Camshaft Outside Diameter (Flywheel End), in (mm) ......... 1.5724-1.5732 (39.940-39.960)
Camshaft Oil Clearance (Flywheel End), in (mm) ......... 0.0016-0.0033 (0.040-0.085)

Crankshaft

Crankshaft Bend, in (mm) ......... 0.0008 (0.02)
Connecting Rod Journal Outside Diameter, in (mm) ......... 1.6517-1.6520 (41.952-41.962)
Connecting Rod Journal Bearingside Diameter, in (mm) ......... 1.6528-1.6536 (41.982-42.002)
Connecting Rod Journal Bearingsert Thickness, in (mm) ......... 0.0592-0.0594 (1.503-1.509)
Connecting Rod Journal Clearance, in (mm) ......... 0.0008-0.0020 (0.020-0.050)
Main Bearing Journal Outside Diameter, in (mm) ......... 1.8485-1.8489 (46.952-46.962)
Main Bearing Journalside Diameter, in (mm) ......... 1.8497-1.8505 (46.982-47.002)
Main Bearing Journalsert Thickness, in (mm) ......... 0.0791-0.0793 (2.009-2.014)
Main Bearing Journal Clearance, in (mm) ......... 0.0008-0.0020 (0.020-0.050)
Connecting Rod Journal Undersize Finished Size, in (mm) ......... 1.6418-1.6422 (41.702-41.712)
Main Bearing Journal Undersize Finished Size, in (mm) ......... 1.8387-1.8391 (46.702-46.712)
Journal Radius, in (mm) ......... 0.138-0.150 (3.5-3.8)
Crankshaft End Play, in (mm) ......... 0.0044-0.0098 (0.111-0.250)
Crankshaft Bearing Thickness, in (mm) ......... 0.0760-0.0780 (1.930-1.980)

Pistons and Piston Rings

Piston Outside Diameter, in (mm) ......... 2.9904-2.9915 (75.955-75.985)
Pistonside Diameter, in (mm) ......... 0.8661-0.9843 (22.0-25.0)
Piston to Cylinder Clearance, in (mm) ......... 0.0014-0.0022 (0.035-0.055)
Piston Pin Holeside Diameter, in (mm) ......... 0.8661-0.8665 (22.000-22.009)
Piston Pin Outside Diameter, in (mm) ......... 0.8659-0.8661 (21.995-22.000)
Piston Pin Clearance, in (mm) ......... 0.0-0.0006 (0.0-0.014)
Top Ring Groove Width, in (mm) ......... 0.0610-0.0618 (1.550-1.570)
Top Ring Width (Std / Wear Limit), in (mm) ......... 0.0579-0.0587 (1.470-1.490) / 0.0571 (1.450)
Top Ring Side Clearance, in (mm) ......... 0.0024-0.0039 (0.060-0.100)
Top Ring End Clearance (Std / Wear Limit), in (mm) ......... 0.0059-0.0118 (0.150-0.300) / 0.0154 (0.390)
2nd Ring Groove Width (Std / Wear Limit), in (mm) ......... 0.0622-0.0628 (1.580-1.595) / 0.0667 (1.695)
2nd Ring Width (Std / Wear Limit), in (mm) ......... 0.0563-0.0571 (1.430-1.450) / 0.0555 (1.410)
2nd Ring Side Clearance (Std / Wear Limit), in (mm) ......... 0.0005-0.0065 (0.013-0.165) / 0.0112 (0.285)
2nd Ring End Clearance (Std / Wear Limit), in (mm) ......... 0.0071-0.0130 (0.180-0.33) / 0.0165 (0.42)
Oil Ring Groove Width (Std / Wear Limit), in (mm) ......... 0.1185-0.1193 (3.010-3.030) / 0.1232 (3.130)
Oil Ring Width (Std / Wear Limit), in (mm) ......... 0.1169-0.1177 (2.970-2.990) / 0.1161 (2.950)
Oil Ring Side Clearance (Std / Wear Limit), in (mm) ......... 0.0008-0.0024 (0.020-0.060) / 0.0071 (0.180)
Oil Ring End Clearance (Std / Wear Limit), in (mm) ......... 0.0079-0.0177 (0.200-0.450) / 0.0213 (0.540)

Connecting Rod

Connecting Rod Small End Bushingside Diameter, in (mm) ......... 0.8671-0.8676 (22.025-22.038)
Connecting Rod Small End Outside Diameter, in (mm) ......... 0.8658-0.8661 (21.991-22.000)
Connecting Rod Small End Oil Clearance, in (mm) ......... 0.0010-0.0019 (0.025-0.047)
Connecting Rod Big End Side Clearance, in (mm) ......... 0.0079-0.0157 (0.20-0.40)

Yanmar 3TNV76 Tightening Torque Specs

Cylinder Head Bolts (M9x1.25), ft-lb (Nm) ........ 40-43 (53.9-57.9)
Connecting Rod Bolts (M7x1.0), ft-lb (Nm) ........ 17-20 (22.6-27.5)
Flywheel Bolts (M10x1.25), ft-lb (Nm) ........ 59-64 (80.4-86.4)
Main Bearing Cap Bolts (M10x1.25), ft-lb (Nm) ........ 56-60 (75.5-81.5)
Crankshaft Pulley Bolts (M12x1.25), ft-lb (Nm) ........ 61-69 (83.3-93.3)
Glow Plug (M10x1.25), ft-lb (Nm) ........ 11-15 (14.7-19.6)
Fuel Injector, ft-lb (Nm) ........ 29 (39.2)
Fuel Pump Drive Gear Nut, ft-lb (Nm) ........ 44-51 (59-69)
High Pressure Injection Line Nuts, ft-lb (Nm) ........ 22-25 (29-34)
Fuel Injection Pump Mounting Nuts, ft-lb (Nm) ........ 17-21 (23-28)
Fuel Injector Nozzle Case Nut, ft-lb (Nm) ........ 36-39 (49-53)