Shibaura H843

The Shibaura H843 is a 1,396 cc (85.2 cu·in) straight-three, liquid-cooled, naturally aspirated diesel engine manufactured by Shibaura.

A 84.0 mm (3.31 in) cylinder bore and 84.0 mm (3.31 in) piston stroke give the H843 diesel engine a total of 1,396 cc (85.2 cu·in) of displacement. The compression ratio rating is 23.0:1.

This engine is equipped with glow plugs and oil bath type air cleaner.

The Shibaura H843 diesel engine produced 26.4 PS (19.4 KW; 26.0 HP) at 2,700 rpm of net horsepower and 75.5 Nm (7.7 kg·m; 55.7 lbf·ft) at 1,500 rpm of peak torque.

The breakdown of the engine code is as follows:

• H – Engine series
• 84 – 84.0 mm of cylinder bore
• 3 – Three cylinders

General information

Engine Specifications
Engine code	H843
Layout	Straight-3, vertical diesel engine
Fuel type	Diesel fuel No.2-D
Production	–
Displacement	1.4 L, 1,396 cm3 (85.2 cu in)
Max. Horsepower (net)	26.4 PS (19.4 KW; 26.0 HP) at 2,700 rpm
Torque output	75.5 Nm (7.7 kg·m; 55.7 lbf·ft) at 1,500 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
Cylinder bore:		84.0 mm (3.31 in)
Piston stroke:		84.0 mm (3.31 in)
Number of piston rings (compression / oil):		2 / 1

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:	45.0-50.0 Nm (4.6-5.1 kgf·m; 33.2-36.9 ft·lb)
Main bearing holders:	48.0-53.0 Nm (4.9-5.4 kgf·m; 35.4-39.1 ft·lb)
Crankshaft rear plate:	46.0-54.0 Nm (4.7-5.5 kgf·m; 33.9-39.9 ft·lb)
Crankshaft pulley:	49.0-59.0 Nm (5-6 kgf·m; 36.2-43.5 ft·lb)
Flywheel:	56.0-69.0 Nm (5.7-7.0 kgf·m; 41.3-50.9 ft·lb)
Cylinder head:	10 mm bolts: 61.0 Nm (6.2 kgf·m; 45 ft·lb) 14 mm bolts: 129.0 Nm (13.2 kgf·m; 95.2 ft·lb)

Maintenance data

Engine speed
Governed speed	Low Idle: 750-850 rpm High Idle: 2,825-2,875 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	22.5-23.5° BTDC
Oil system
Recommended engine oil	CD or CE
SAE Viscosity Number	SAE 10W-30, 10W-40
Engine oil capacity	5.3 liters (5.6 US.qts, 4.6 Imp. qts)
Electrical system
Alternator:	12V
Volts:	12V
Ground polarity:	Negative

Applications

The Shibaura H843 engine is used on the following tractors

Model	Years Produced
Ford 1710	1983-1986
Shibaura SD2203	–
Shibaura SD2243	–
Shibaura SD2843	–