The Shibaura S723 is a 879 cc (53.6 cu·in) straight-three, water-cooled naturally aspirated diesel engine manufactured by Shibaura.
A 72.0 mm (2.83 in) cylinder bore and 72.0 mm (2.83 in) piston stroke give the S723 diesel engine a total of 879 cc (53.6 cu·in) of displacement. The compression ratio rating is 23.0:1 or 24.0:1. This engine is equipped with glow plugs and dry type air cleaner.
The Shibaura S723 diesel engine produced 16.2 PS (11.9 KW; 16.0 HP) at 2,700 rpm of maximum net horsepower and 48.8 Nm (4.98 kg·m; 36.01 lbf·ft) at 1,800 rpm of peak torque.
The breakdown of the engine code is as follows:
- S – Engine series
- 72 – 72.0 mm of cylinder bore
- 3 – Three cylinders
General information
| Engine Specifications | |
| Engine code | S723 |
| Layout | Straight-3, vertical diesel engine |
| Fuel type | Diesel fuel No.2-D |
| Production | – |
| Displacement | 0.9 L, 879 cm3 (53.6 cu in) |
| Max. Horsepower (net) | 14.1 PS (10.4 KW; 14.0 HP) at 2,500 rpm 16.2 PS (11.9 KW; 16.0 HP) at 2,700 rpm |
| Torque output | 48.8 Nm (4.98 kg·m; 36.01 lbf·ft) at 1,800 rpm |
| Injection type | Indirect injection |
| Cooling system | Liquid-cooled |
| Fuel system | Fuel injection pump |
| Starting system | Electric starting |
| Starting support device | Glow plug in combustion chamber |
| Power adder | None |
| Firing order | 1-2-3 |
Cylinder block
| Cylinder block | ||
| Compression ratio: | 23.0:1 or 24.0:1 | |
| Cylinder bore: | 72.0 mm (2.83 in) | |
| Piston stroke: | 72.0 mm (2.83 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Crankshaft main journal diameter: | 45.964-45.975 mm (1.8096-1.8100 in) | |
| Crankpin diameter: | 38.964-38.975 mm (1.5340-1.5344 in) | |
Cylinder head
| Cylinder head | ||
| Valve Arrangement: | – | |
| Valves: | 6 (2 valves per cylinder) | |
| Valve seat angle: | INTAKE | 45° |
| EXHAUST | 45° | |
| Valve face angle: | INTAKE | 45° |
| EXHAUST | 45° | |
Tightening torque
| Tightening torque specs | |
| Connecting rod caps: | 29.0-34.0 Nm (3-3.5 kgf·m; 21.4-25.1 ft·lb) |
| Main bearing holders: | 25.0-29.0 Nm (2.6-3.0 kgf·m; 18.5-21.4 ft·lb) |
| Flywheel: | 56.0-69.0 Nm (5.7-7.0 kgf·m; 41.3-50.9 ft·lb) |
| Cylinder head: | 48.0 Nm (4.9 kgf·m; 35.4 ft·lb) |
Maintenance data
| Engine speed | |
| Governed speed | Low Idle: 750-850 rpm High Idle: 2,750-2,800 rpm |
| Valve clearance | |
| Intake valve | 0.20 mm (0.008 in) |
| Exhaust valve | 0.20 mm (0.008 in) |
| Injector opening pressure | |
| Standard | 11,760 kPa (1705 psi) |
| Injection timing | |
| Standard | 24° BTDC |
| Oil system | |
| Recommended engine oil | CD or CE |
| SAE Viscosity Number | SAE 10W-30, 10W-40 |
| Engine oil capacity | 3.3 liters (3.49 US.qts, 2.9 Imp. qts) |
| Electrical system | |
| Alternator: | 12V, 35A |
| Regulator: | Mechanical |
| Volts: | 12V |
| Ground polarity: | Negative |
Applications
The Shibaura S723 engine is used on the following tractors
| Model | Years Produced |
| Ford 1120 | 1987-1993 |
| Ford 1210 | 1983-1986 |
| Ford 1215 | 1993-1998 |
| New Holland 1120 | 1987-1983 |
| New Holland 1215 | 1996-1998 |
| Shibaura SP1440 | – |
| Shibaura SP1840 | – |
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