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Kubota D1403 Specifications
The Kubota D1403 is a 1.4 L (1,393 cc, 85.0 cubic inches) 3-cylinder
water-cooled naturally aspirated vertical diesel engine manufactured by
Kubota.
The Kubota D1403 engine has a spherical type сombustion сhamber, the
Bosch mini fuel injection pump, and the Bosch throttle-type injection
nozzle. The cylinder bore and the piston stroke are 80.0 mm (3.15) in
and 92.4 mm (3.64 in), appropriately. The compression ratio rating is
23.0:1.
The D1403-B(E) diesel engine produced 31.4 PS (23.1 KW; 31.0 HP) at
2,800 rpm of maximum power.
Engine code identification:
D - Three-cylinder,
14 - Approximate displacement 1400 cc.
| General Technical Data |
Engine model ............... Kubota D1403
Engine type ............... 4-stroke 3-cylinder water-cooled diesel
Number of cylinders ............... 3
Total displacement, L (cu.in) ............... 1.39 (85.01)
Cylinder bore, mm (in) ............... 80.0 (3.15)
Piston stroke, mm (in) ............... 92.4 (3.64)
Gross power, kW (Hp) ............... 23.1 (31.0)
Net power, kW (Hp) ............... 21.6 (29.0)
Maximum speed, rpm ............... 3000
Aspiration type ............... Naturally aspirated
Idle speed, rpm ............... 700-750
Firing order ............... 1-2-3
Compression ratio ............... 23.0:1
Combustion chamber ............... Spherical type
Direction of rotation ............... Counterclockwise
Lubrication system ............... Forced lubrication by trochoid pump
Oil filter type ............... Full flow paper filter (cartridge)
Cooling system ............... Pressurized radiator, forced circulation with water pump
Engine oil capacity, L (qts) ............... 5.6 (5.9)
Starting system ............... Electric starting with starter
Electrical system rating, Volts ............... 12
| Fuel System |
Injection pump ............... Bosch type mini pump
Injection nozzle ............... Bosch throttle type
Injection pressure, kPa (psi) ............... 13730 (1990)
Injection timing, deg (rad) ............... 18 (0.314) before TDC
Governor type ............... Centrifugal, mechanical
| Dimensions and Weight |
Overall length, mm (in) ............... 560 (22.1)
Overall width, mm (in) ............... 503 (19.8)
Overall height, mm (in) ............... 678 (26.7)
Net weight, kg (lbs) ............... 148 (326)
| Cylinder Block |
Cylinder Bore I.D (Std) ............... 80.000-80.022 mm (3.1496-3.1505 in)
Cylinder Bore I.D (Oversize) ............... 80.500-80.522 mm (3.1693-3.1702 in)
Crankshaft Alignment – 0.02 mm (0.00079 in)
Crankshaft Journal to Bearing 1 Clearance ............... 0.040-0.118 mm (0.00157-0.00465 in)
Crankshaft Journal to Bearing 2 Clearance ............... 0.040-0.104 mm (0.00157-0.00409 in)
Crankshaft Journal O.D ............... 59.921-59.940 mm (2.35910-2.35984 in)
Crankshaft Bearing 1 I.D ............... 59.980-60.039 mm (2.36142-2.36374 in)
Crankshaft Bearing 2 I.D ............... 59.980-60.025 mm (2.36142-2.36319 in)
Crankpin to Crankpin Bearing Clearance ............... 0.025-0.087 mm (0.00098-0.00343 in)
Crankpin O.D ............... 46.959-46.975 mm (1.84878-1.84941 in)
Crankpin Bearing I.D ............... 47.000-47.046 mm (1.85039-1.85221 in)
Crankshaft Side Clearance (Std) ............... 0.15-0.31 mm (0.0059-0.0122 in)
Crankshaft Side Clearance (Wear Limit) ............... 0.50 mm (0.0197 in)
| Cylinder Head and Valves |
Cylinder Head Surface Flatness ............... 0.05 mm / 500 mm (0.002 in / 19.7 in)
Valve Clearance (Cold) ............... 0.18-0.22 mm (0.0071-0.0086 in)
Top Clearance ............... 0.55-0.70 mm (0.0217-0.0276 in)
Valve Stem to Valve Guide Clearance ............... 0.040-0.070 mm (0.0016-0.0027 in)
Valve Stem O.D ............... 7.960-7.975 mm (0.31339-0.31398 in)
Valve Guide I.D ............... 8.015-8.030 mm (0.31555-0.31614 in)
Valve Seat Width (Intake) ............... 2.12 mm (0.0835 in)
Valve Seat Width (Exhaust) ............... 2.12 mm (0.0835 in)
Valve Seat Angle (Intake) ............... 1.05 rad (60 deg)
Valve Seat Angle (Exhaust) ............... 0.79 rad (45 deg)
Valve Spring Free Length ............... 41.7-42.2 mm (1.6417-1.6614 in)
Camshaft Side Clearance ............... 0.07-0.22 mm (0.0028-0.0087 in)
Camshaft Alignment ............... 0.01 mm (0.0004 in)
Camshaft Journal to Cylinder Bore Clearance ............... 0.050-0.091 mm (0.0020-0.0035 in)
Cam Height (Intake) ............... 33.263-33.283 mm (1.3096-1.3104 in)
Cam Height (Exhaust) ............... 33.463-33.483 mm (1.3174-1.3182 in)
| Piston and Piston Rings |
Piston Pin Bore I.D (Std) ............... 25.000-25.013 mm (0.98425-0.98476 in)
Piston Pin Bore I.D (Wear Limit) ............... 25.05 mm (0.9862 in)
Piston Pin O.D ............... 25.002-25.011 mm (0.98433-0.98469 in)
Piston Pin to Small End Bushing Clearance ............... 0.014-0.038 mm (0.00056-0.00150 in)
Piston Pin Small End Bushing I.D ............... 25.025-25.040 mm (0.98524-0.98583 in)
Second Ring Groove Clearance (Std) ............... 0.093-0.120 mm (0.0037-0.0047 in)
Second Ring Groove Clearance (Wear Limit) ............... 0.20 mm (0.0079 in)
Oil Ring Groove Clearance (Std) ............... 0.020-0.052 mm (0.0008-0.0020 in)
Oil Ring Groove Clearance (Wear Limit) ............... 0.15 mm (0.0059 in)
Top Ring End Gap (Std) ............... 0.30-0.45 mm (0.0118-0.0177 in)
Second Ring End Gap (Std) ............... 0.30-0.45 mm (0.0118-0.0177 in)
Oil Ring End Gap (Std) ............... 0.25-0.45 mm (0.0098-0.0177 in)
Ring End Gap (Wear Limit) ............... 1.25 mm (0.0492 in)
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| Engines Technical Specifications |