________________________________________________________________________________________
Home / Engines / Kubota Engines / Kubota D640 |
Kubota D640 Specifications
The Kubota D640 is a 638 cc (38.9 cubic inches) 3-cylinder water-cooled naturally aspirated diesel engine manufactured by Kubota. The Kubota D640 engine has a spherical type сombustion сhamber with a glow plug. The cylinder bore is 66.0 mm (2.60 in) and the piston stroke is 62.2 mm (2.45 in). The Kubota D640 diesel engine produced 16.0 PS (11.8 KW; 15.8 HP) at 3,200 rpm of maximum power. Engine code identification: D - Three-cylinder, 640 - Approximate displacement 640 cc.
General Technical Data |
Engine Model .............. Kubota D640
Engine Type .............. Vertical, water-cooled, 4 cycle diesel
Number of Cylinders .............. 3
Displacement, cu in (L) .............. 38.9 (0.638)
Cylinder Bore, in (mm) .............. 2.60 (66.0)
Piston Stroke, in (mm) .............. 2.45 (62.2)
Aspiration Type .............. Naturally aspirated
Rated Engine Power, hp (kW) .............. 16.0 (11.8)
Rated Engine Speed, rpm .............. 3200
Firing Order .............. 1-2-3
Fuel System .............. Injection pump
Lubrication System .............. Forced lubrication by trochoid pump
Oil filter type .............. Full flow paper filter (cartridge)
Cooling System .............. Water with pressurized radiator
Pre-Heating .............. Glow plugs
Coolant Capacity, qts (L) .............. 2.2 (2.1)
Electrical System Rating, Volts .............. 12
Starting Motor .............. 12V, 0.8 kW
Battery Rating .............. 12V, 45 AH
Dimensions and Weight |
Overall Length, mm (in) .............. 377 (14.8)
Overall Width, mm (in) .............. 425 (16.7)
Overall Height, mm (in) .............. 477 (18.8)
Dry weight, kg (lbs.) .............. 61.3 (135)
Cylinder Block |
Cylinder Liner Inside Diameter (Minimum), in (mm) .............. 2.5984 (65.960)
Cylinder Liner Inside Diameter (Maximum), in (mm) .............. 2.6044 (66.130)
Piston Outside Diameter, in (mm) .............. 2.5957 (65.906)
Piston Ring End Gap, in (mm) .............. 0.017-0.035 (0.431-0.886)
Crankshaft End Play, in (mm) .............. 0.012 (0.304)
Crankshaft Journal Outside Diameter, in (mm) .............. 1.5722-1.5728 (39.934-39.950)
Crankshaft Bearing Inside Diameter, in (mm) .............. 1.5715-1.5764 (39.984-40.040)
Crankshaft Journal to Bearing Oil Clearance, in (mm) .............. 0.0013-0.0042 (0.034-0.106)
Crankpin to Crankpin Bearing Oil Clearance, in (mm) .............. 0.0008-0.0020 (0.020-0.051)
Crankpin Outside Diameter, in (mm) .............. 1.3370-1.3376 (33.959-33.975)
Crankpin Bearing Inside Diameter, in (mm) .............. 1.3389-1.3390 (33.995-34.010)
Valves |
Intake Valve Clearance (Cold), in (mm) .............. 0.0057-0.0073 (0.145-0.185)
Exhaust Valve Clearance (Cold), in (mm) .............. 0.0057-0.0073 (0.145-0.185)
Exhaust Valve Head Diameter, in (mm) .............. 0.89 (22.50)
Intake Valve Head Diameter, in (mm) .............. 1.03 (26.00)
Exhaust Valve Stem Outside Diameter, in (mm) .............. 0.2354 (5.980)
Intake Valve Stem Outside Diameter, in (mm) .............. 0.2354 (5.980)
Intake Valve Guide Inside Diameter, in (mm) .............. 0.2372 (6.030)
Exhaust Valve Guide Inside Diameter, in (mm) .............. 0.2372 (6.030)
Exhaust Valve Seat Angle, deg .............. 45
Intake Valve Seat Angle, deg .............. 45
________________________________________________________________________________________
________________________________________________________________________________________
Engines Technical Specifications |