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Kubota D662 Specifications
The Kubota D662 is a 0.66 L (656 cc, 40.0 cubic inches) 3-cylinder water-cooled naturally aspirated diesel engine manufactured by Kubota. The Kubota D662 engine has a spherical type сombustion сhamber with glow plug, Bosch MD mini fuel injection pump, and Bosch throttle type injection nozzle. The compression ratio rating is 23.0:1. Cylinder bore is 64.0 mm (2.52 in) and piston stroke is 68.0 mm (2.68 in). The D662 diesel engine produced 12.9 PS (9.5 kW; 12.7 HP) at 3,600 rpm of maximum (intermittent) power. Engine code identification: D - Three-cylinder, 66 - Approximate displacement 660 cc, 2 - Kubota super mini series.
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| General Technical Data |
Engine Model .............. Kubota D662
Engine Type .............. Vertical, water-cooled, 4-cycle diesel
Number of cylinders .............. 3
Bore, mm (in) .............. 64.0 (2.52)
Stroke, mm (in) .............. 68.0 (2.68)
Total displacement, cm3 (cu. in) .............. 656 (40.1)
Gross power, kw (hp) .............. 14.3 (19.2)
Net power, kw (hp) .............. 12.9 (17.3)
Maximum speed, rpm .............. 3800
Idling speed, rpm .............. 900-1000
Combustion Chamber .............. Spherical type (E-TVCS)
Direction of rotation .............. Counter-clockwise
Compression ratio .............. 23:1
Firing order .............. 1-2-3
| Fuel System |
Fuel injection pump .............. Bosch MD type mini pump
Injection nozzle .............. Bosch "Throttle" type
Injection timing, deg (rad) .............. 20 (0.35) before T.D.C.
Injection pressure, MPa (psi) .............. 13.73 (1991)
Governor .............. All speed mechanical governor
| Lubricating System |
Lubricating system .............. Forced lubrication by trochoid pump
Oil pressure indicating .............. Electrical type switch
Oil filter .............. Full flow paper filter (cartridge type)
| Electrical System |
Starting system .............. Electric starting with starter
Starting Motor .............. 12V, 0.8 kW
Starting support device .............. By glow plug in combustion chamber
Battery .............. 12V, 36 AH
Charging Alternator .............. 12V, 150W
| Dimensions and Weight |
Overall Length, mm (in) .............. 435 (17.1)
Overall Width, mm (in) .............. 404 (15.9)
Overall Height, mm (in) .............. 564 (22.2)
Dry weight, kg (lbs.) .............. 63.7 (140)
| Cylinder Block |
Cylinder Block Bore I.D .............. 33.000-33.025 mm (1.2993-1.3001 in)
Cylinder Liner (Oversize 0.25 mm) I.D .............. 64.250-64.269 mm (2.52953-2.53027 in)
Cylinder Liner I.D .............. 64.000-64.019 mm (2.51968-2.52043 in)
Compression Pressure .............. 2.85-3.23 MPa (413-469 psi)
Crankpin Bearing I.D .............. 33.995-34.010 mm (1.3384-1.3389 in)
Crankpin to Crankpin Bearing Oil Clearance .............. 0.020-0.051 mm (0.00079-0.0020 in)
Idle Gear Bushing I.D .............. 20.000-20.051 mm (0.78740-0.78940 in)
Idle Gear Shaft O.D .............. 19.967-19.980 mm (0.78611-0.78661 in)
Idle Gear Shaft to Gear Bushing Oil Clearance .............. 0.020-0.084 mm (0.00079-0.0033 in)
Piston Pin Bore I.D .............. 20.000-20.013 mm (0.78741-0.78791 in)
Piston Pin O.D .............. 20.002-20.011 mm (0.78748-0.78783 in)
Piston Pin to Small End Bushing Clearance .............. 0.014-0.038 mm (0.00056-0.0014 in)
Oil Ring Groove Clearance .............. 0.040-0.080 mm (0.0016-0.0031 in)
Second Ring Groove Clearance .............. 0.0900-0.120 mm (0.00355-0.00472 in)
| Cylinder Head and Valves |
Cylinder Head Surface, Flatness .............. 0.05 mm (0.002 in)
Exhaust Valve Timing, Close .............. 0.26 rad (15 deg) after T.D.C
Exhaust Valve Timing, Open .............. 0.87 rad (50 deg) before B.D.C
Intake Valve Timing, Close .............. 0.79 rad (45 deg) after B.D.C
Intake Valve Timing, Open .............. 0.35 rad (20 deg) before T.D.C
Push Rod Alignment .............. 0.25 mm (0.0098 in)
Rocker Arm I.D .............. 10.500-10.518 mm (0.41339-0.41409 in)
Rocker Arm Shaft O.D .............. 10.473-10.484 mm (0.41233-0.41275 in)
Rocker Arm Shaft to Rocker Arm Clearance .............. 0.016-0.045 mm (0.00063-0.0017 in)
Top Clearance .............. 0.50-0.70 mm (0.020-0.027 in)
Valve Clearance (Cold) .............. 0.145-0.185 mm (0.00571-0.00728 in)
Valve Guide I.D .............. 6.010-6.025 mm (0.2367-0.2372 in)
Valve Recessing .............. 0.10-0.10 mm (0.0039-0.0039 in)
Valve Spring Free Length .............. 31.3-31.8 mm (1.24-1.25 in)
Valve Spring Setting Load / Setting Length .............. 65 N / 27.0 mm (15 lbf / 1.06 in)
Valve Spring Tilt .............. 1.2 mm (0.047 in)
Valve Stem O.D .............. 5.968-5.980 mm (0.2350-0.2354 in)
Valve Stem to Valve Guide Clearance .............. 0.030-0.057 mm (0.0012-0.0022 in)
Cam Height (Intake and Exhaust) .............. 26.88 mm (1.058 in)
Camshaft Alignment .............. 0.01 mm (0.0004 in)
Camshaft Journal O.D .............. 32.934-32.950 mm (1.2967-1.2972 in)
Camshaft Journal to Cylinder Bore Oil Clearance .............. 0.050-0.091 mm (0.0020-0.0035 in)
| Timing Gear |
Crank Gear to Idle Gear Backlash .............. 0.0430-0.124 mm (0.00170-0.00488 in)
Idle Gear to Cam Gear Backlash .............. 0.0470-0.123 mm (0.00185-0.00484 in)
Idle Gear to Injection Pump Gear Backlash .............. 0.0460-0.124 mm (0.00182-0.00488 in)
Crank Gear to Oil Pump Drive Gear Backlash .............. 0.0410-0.123 mm (0.00162-0.00484 in)
Idle Gear Side Clearance .............. 0.20-0.51 mm (0.0079-0.020 in)
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