The Kubota D662-D14 is a 0.66 L (656 cc, 40.0 cu·in) straight-three, water-cooled naturally aspirated diesel engine manufactured by Kubota. This engine was installed on the Kubota B1410 tractor.
The Kubota D662-D14 engine has a spherical type сombustion сhamber with glow plug, Bosch MD mini fuel injection pump, and Bosch throttle type injection nozzle.
Cylinder bore is 64.0 mm (2.52 in) and piston stroke is 68.0 mm (2.68 in). The compression ratio rating is 23.0:1.
The D662-D14 diesel engine produced 13.1 PS (9.6 KW; 13.0 HP) at 3,200 rpm of max horsepower (DIN70020) and 37.0 Nm (3.77 kg·m; 27.31 ft·lb) at 2,800 rpm of torque.
The breakdown of the engine code is as follows:
- D – 3-cylinders
- 66 – Approximate displacement 660 cc
- 2 – Super-Mini series
General information
| Engine Specifications | |
| Engine code | D662-D14 |
| Layout | Straight-3, vertical diesel engine |
| Fuel type | Diesel fuel No.2-D |
| Production | – |
| Displacement | 0.66 L, 656 cm3 (40.0 cu in) |
| Max. Horsepower | DIN70020: 13.1 PS (9.6 KW; 13.0 HP) at 3,200 rpm |
| Torque output | 37.0 Nm (3.77 kg·m; 27.31 ft·lb) at 2,800 rpm |
| Injection type | Indirect injection |
| Cooling system | Liquid-cooled |
| Fuel injection pump | Bosch MD type mini fuel injection pump |
| Fuel nozzle | Bosch throttle type |
| Starting system | Electric starting with 12V (0.8 kW) starter |
| Starting support device | Glow plug in combustion chamber |
| Governor | Centrifugal ball mechanical governor |
| Power adder | None |
| Firing order | 1-2-3 |
| Dimensions (L x W x H): | 426 x 398 x 519 mm (16.8 x 15.7 x 20.4 in) |
| Weight | 63.7 kg (140.4 lbs) |
Cylinder block
| Cylinder block | ||
| Compression ratio: | 23.0:1 | |
| Cylinder bore: | 64.0 mm (2.52 in) | |
| Piston stroke: | 68.0 mm (2.68 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Cylinder inner diameter: | 64.000-64.019 mm (2.5197-2.5204 in) | |
| Piston skirt diameter | – | |
| Piston ring side clearance: | Second | 0.085-0.112 mm (0.0033-0.0044 in) |
| Oil | 0.020-0.060 mm (0.0008-0.0024 in) | |
| Piston ring end gap: | Top | 0.150-0.300 mm (0.0059-0.0118 in) |
| Second | 0.300-0.450 mm (0.0118-0.0177 in) | |
| Oil | 0.150-0.300 mm (0.0059-0.0118 in) | |
| Piston pin outer diameter | 20.002-20.011 mm (0.7875-0.7878 in) | |
| Crankshaft main journal diameter: |
Flywheel side: 43.934-43.950 mm (1.72969-1.73032 in) Other: 39.934-39.950 mm (1.5722-1.5728 in) |
|
| Crankpin diameter: | 33.959-33.975 mm (1.337-1.3376 in) | |
Cylinder head
| Cylinder head | ||
| Valve Arrangement: | OHV, gear drive | |
| Valves: | 6 (2 valves per cylinder) | |
| Valve timing: | INTAKE | – |
| EXHAUST | – | |
| Valve seat width: | INTAKE | 2.120 mm (0.0835 in) |
| EXHAUST | 2.120 mm (0.0835 in) | |
| Valve stem diameter: | INTAKE | 5.968-5.980 mm (0.2349-0.2354 in) |
| EXHAUST | 5.968-5.980 mm (0.2349-0.2354 in) | |
| Valve spring free length: | INTAKE | 31.6 mm (1.2441 in) |
| EXHAUST | 31.6 mm (1.2441 in) | |
| Camshaft lobe height: | INTAKE | 26.88 mm (1.0583 in) |
| EXHAUST | 26.88 mm (1.0583 in) | |
| Camshaft journal diameter: | 32.934-32.950 mm (1.2966-1.2972 in) | |
Tightening torque
| Tightening torque specs | |
| Head cover cap nuts (M6x1.0): | 3.9-5.3 Nm (0.4-0.6 kgf-m, 2.9-4.3 lb-ft) |
| Head bolts (M8x1.25): | 39.2-44.1 Nm (4.0-4.5 kgf-m, 28.9-32.5 lb-ft) |
| Main bearing case bolts 1 (M6x1.0): | 12.7-15.7 Nm (1.3-1.6 kgf-m, 9.4-11.6 lb-ft) |
| Main bearing case screw 2 (M7x1.0): | 26.5-30.4 Nm (2.7-3.1 kgf-m, 19.5-22.4 lb-ft) |
| Flywheel bolts (M10x1.25): | 53.9-58.8 Nm (5.5-6.0 kgf-m, 39.8-43.4 lb-ft) |
| Connecting rod bolts (M7x0.75): | 26.5-30.4 Nm (2.7-3.1 kgf-m, 19.5-22.4 lb-ft) |
| Rocker arm bracket nuts (M6x1.0): | 9.81-11.28 Nm (1.0-1.15 kgf-m, 7.23-8.32 lb-ft) |
| Idle gear shaft bolts (M6x1.0): | 9.8-11.3 Nm (1.00-1.15 kgf-m, 7.2-8.3 lb-ft) |
| Idle gear shaft screws (M6x1.0): | 9.8-11.3 Nm (1.00-1.15 kgf-m, 7.2-8.3 lb-ft) |
| Glow plugs (M8x1.0): | 7.8-14.7 Nm (0.8-1.5 kgf-m, 5.8-10.8 lb-ft) |
| Nozzle holder assembly (M20x1.5): | 49.0-68.6 Nm (5.0-7.0 kgf-m, 36.2-50.6 lb-ft) |
| Nozzle holder and nozzle retaining nut: | 58.8-78.5 Nm (6.0-8.0 kgf-m, 43.4-57.9 lb-ft) |
| Injection pipe retaining nuts: | 24.5-34.3 Nm (2.5-3.5 kgf-m, 18.1-25.3 lb-ft) |
Maintenance data
| Valve clearance | |
| Intake valve | 0.145-0.185 mm (0.0057-0.0073 in) |
| Exhaust valve | 0.145-0.185 mm (0.0057-0.0073 in) |
| Compression pressure | |
| Standard | 2.84-3.24 MPa, 29-33 kgf/cm2, 412-469 psi |
| Oil system | |
| Recommended engine oil | CD or CE |
| SAE Viscosity Number | SAE 10W-30, 10W-40 |
| Engine oil capacity | 2.4 liters (2.54 US.qts, 2.11 Imp. qts) |
| Fuel system | |
| Fuel injection pressure | 13.73-14.71 MPa (140-150 kgf/cm2, 1991-2133 psi) |
| Cooling system | |
| Thermostat’s valve opening temperature: | 69.5-72.5°C (157.1-162.5°F) |
| Temperature at which thermostat completely opens: | 85°C (185°F) |
| Electrical system | |
| Battery: | 12V, CCA 390A |
| Starter mica undercut: | 0.5-0.8 mm (0.0197-0.0315 in) |
| Starter brush length: | 16.0 mm (0.6299 in) |
| Alternator (no-load voltage): | AC 20V at 5,200 rpm |
| Glow plug resistance: | Approx 0.9 Ω |
| Alternator stator resistance: | Less than 1.0 Ω |
| Alternator rotor resistance: | Less than 2.9 Ω |
| Alternator slip ring: | 14.4 mm (0.567 in) |
| Alternator brush Length: | 10.5 mm (0.413 in) |
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