The Toyosha S126 is a 1.3 L (1,263 cc, 77.07 cu·in) natural aspirated two-cylinders four-stroke liquid-cooled internal combustion small diesel engine, manufactured by Japanese company Hinomoto under the Toyosha brand for general-purpose applications.
The Toyosha S126 engine has two cylinders, incorporate overhead valves, an indirect injection system, and an electric starter. The engine used a single-stage dry air cleaner, forced circulation liquid cooling system, and glow plugs for starting aid.
This engine produced 23.3 PS (17.2 kW; 23.0 HP) of maximum horsepower.
General information
| Engine Specifications | |
| Engine model | S126 |
| Engine type | 4-stroke, OHV, two-cylinders |
| Displacement | 1,263 cm3, (77.07 cu·in) |
| Max. horsepower | 23.3 PS (17.2 kW; 23.0 HP) |
| Max. torque | – |
| Cooling system | Liquid-cooled |
| Air cleaner | Single stage, dry element |
| Lubricating system | Forced splash |
| Fuel system | Inderect injection (Kiki injection pump) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Electric starter (Hitachi S12-61) |
| Charging system | Alterator (Hitachi L115-5B) |
Cylinder Block and Head
Cylinder bore and piston stroke are 92.0 mm (3.62 in) and 95.0 mm (3.74 in), respectively. Compression ratio rating is 23:1. The cylinder head is a one-piece alloy cast-iron casting as is the engine block and no cylinder sleeves are used. The pistons are aluminum alloy casting. The crankshaft is supported by three main bearings. Grow plugs located in the precombustion swirl chambers of the head provide aid for cold starting.
| Cylinder block | |
| Compression ratio: | 23:1 |
| Cylinder bore: | 92.0 mm (3.62 in) |
| Piston stroke: | 95.0 mm (3.74 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Number of main bearings: | 3 |
| Crankshaft center distance: | 47.5 mm (1.87 in) |
| Cylinder head | |
| Valve arrangement: | OHV |
| Valves: | 2 per cylinder (4 valves in total) |
Tightening torque
| Tightening torque settings | |
| Cylinder head bolt torque: | 88-108 Nm; 8.8-10.8 kg·m; 65-80 lb·ft |
| Connecting rod cap torque: | 59-67 Nm; 5.9-6.7 kg·m; 43-50 lb·ft |
| Main bearing cap bolt: | 59-78 Nm; 5.9-7.8 kg·m; 43-57 lb·ft |
Service Data
The diesel oil (API Service Classification CC or CD) with a viscosity of SAE 10W-30 is recommended for the S126, refilling oil capacity is 3.7 L (3.91 US. qt, 3.26 Imp. qt.). The valve clearance is 0.30 mm (0.0118 in) for intake valves and 0.35 mm (0.0138 in) for exhaust valves.
| Engine | |
| Valve clearance | |
| Intake valve clearance: | 0.30 mm (0.0118 in) |
| Exhaust valve clearance: | 0.35 mm (0.0138 in) |
| Oil system | |
| Lubrication system: | Forced splash |
| Oil type: | Diesel oil (API Service Classification CC or CD) |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 3.7 L (3.91 US. qt, 3.26 Imp. qt.) |
| Fuel system | |
| Type: | Inderect injection |
| Pump type: | Kiki NP-PE |
| Injestion timing: | 20° BTDC |
| Fuel nozzle opening pressure: | 11,800-12,700 kPa (1,700-1,840 PSI) |
Applications
| Model | Years Produced |
| Allis Chalmers 5020 | 1977-1985 |
| Simplicity 9523 | 1978-1983 |
| Massey Ferguson 210 | 1978-1984 |
| Massey Ferguson 210-4 | 1978-1984 |
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