Kubota D1403 Specifications
| Engine Model: Kubota D1403 |
| Engine Type: 4-cycle vertical 3-cylinder liquid-cooled diesel |
| Total Displacement: 85 cu.in (1.39 L) |
| Rated Engine Power: 25 Hp (18.5 kW) at 3000 rpm |
| Aspiration Type: Naturally aspirated |
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Engine model ............... Kubota D1403
Engine type ............... 4-stroke 3-cylinder liquid-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) ............... 18.5 (25.0)
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 ............... Fuel injection
Injection pump ............... Bosch type mini pump
Injection nozzle ............... Bosch throttle type
Governor type ............... Centrifugal, mechanical
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 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 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 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)
Cylinder bore inside diameter, mm (in) ............... 80.000-80.022 (3.1496-3.1505)
Cylinder compression, kPa (psi) ............... 3530-3720 (512-540)
Cylinder head (max out of flatness), mm (in) ............... 0.05 (0.002)
Intake valve clearance (Cold), mm (in) ............... 0.18-0.22 (0.0071-0.0086)
Exhaust valve clearance (Cold), mm (in) ............... 0.18-0.22 (0.0071-0.0086)
Engine oil pressure (Idle Speed), kPa (psi) ............... 98 (14)
Engine oil pressure (Rated Speed), kPa (psi) ............... 294-441 (43-64)
Injection pressure, kPa (psi) ............... 13730 (1990)
Injection timing, deg (rad) ............... 18 (0.314) before TDC
Engine oil type ............... SAE 10W-30, 10W-40
Oil classification (API service) ............... CD, CF or CE
Engine oil capacity (3.5" oil pan), L (qts) ............... 5.6 (5.9)
Engine oil capacity (4.9" oil pan), L (qts) ............... 7.0 (7.4)
Oil filter part number ............... HH164-32430
Fuel filter part number ............... 6A320-59930
Air filter part number ............... TA040-93230/TA040-93220
Service Air Filter ............... Every 100 hours
Check Battery ............... Every 100 hours
Check Belt Tension ............... Every 100 hours
Change Engine Oil ............... Every 200 hours
Replace Oil Filter ............... Every 200 hours
Replace Fuel Filter ............... Every 400 hours
Clean Radiator Fins ............... Every 400 hours
Check Valve Clearance ............... Every 800 hours
Replace Air Filter ............... Every 1000 hours
Check Injection Nozzles ............... Every 1500 hours
Change Engine Coolant ............... Every 1500 hours
Cylinder head cover screw (M6x1.0), Nm (lb-ft) ............... 6.9-11.3 (5.1-8.32)
Cylinder head cover cap nut (M8x1.25), Nm (lb-ft) ............... 6.9-8.8 (5.1-6.5)
Cylinder head screw (M11x1.25), Nm (lb-ft) ............... 93.2-98.1 (68.7-72.3)
Injection pipe retaining nut (M12x1.5), Nm (lb-ft) ............... 24.5-34.3 (18.1-25.3)
Nozzle holder assembly (M20x1.5), Nm (lb-ft) ............... 49.0-68.6 (36.2-50.6)
Overflow pipe assembly retaining nut (M12x1.5), Nm (lb-ft) ............... 19.6-24.5 (14.5-18.1)
Glow plug (M10x1.25), Nm (lb-ft) ............... 19.6-24.5 (14.5-18.1)
Rocker arm bracket nut (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Fan drive pulley mounting nut (M30x1.5), Nm (lb-ft) ............... 137.3-156.9 (101.3-115.7)
Fan drive pulley screw (M16x1.5), Nm (lb-ft) ............... 313.8-333.4 (231.5-245.9)
Camshaft set screw (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Connecting rod screw (M8x1.0), Nm (lb-ft) ............... 44.1-49.0 (32.5-36.2)
Flywheel screw (M12x1.25), Nm (lb-ft) ............... 98.1-107.9 (72.3-79.6)
Bearing case cover screw (M8x1.25), Nm (lb-ft) ............... 23.5-27.5 (17.4-20.3)
Main bearing case screw 2 (M10x1.25), Nm (lb-ft) ............... 68.6-73.5 (50.6-54.2)
Main bearing case screw 1 (M9x1.25), Nm (lb-ft) ............... 46.1-51.0 (34.0-37.6)
Alternator’s pulley nut, Nm (lb-ft) ............... 58.3-78.9 (43.0-58.2)
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