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Kubota V2403 Engine
General Technical Data
Kubota V2403 Engine Specifications
Engine model .......... Kubota V2403
Engine type .......... Vertical, water-cooled, 4-cylinder diesel
Number of cylinders .......... 4
Bore and stroke, mm (in.) .......... 87 x 102.4 (3.43 x 4.04)
Total displacement, L (cu.in.) .......... 2.44 (148.6)
Combustion chamber .......... Spherical Type (E-TVCS)
Gross power, kw (hp) .......... 35.8 (48.0)
Net power, kw (hp) .......... 31.1 (41.6)
Maximum speed, rpm .......... 2800
Iidling speed, rpm .......... 750-850
Firing Order .......... 1-3-4-2
Direction of rotation .......... Counter-clockwise
Compression ratio .......... 23.8
Compression Pressure .......... 2.95-3.23 MPa (427-469 psi)
Fuel System
Injection pump .......... Bosch Type mini pump
Injection pressure .......... 13.73 MPa, 1991 psi
Injection timing (Before T.D.C.) .......... 0.314 rad (18 deg)
Electrical System
Starting system .......... Cell starter (with glow plug)
Starting motor .......... 12V, 2.0 kW
Charging generator .......... 12V, 480W
Battery capacity .......... 12V, 100-120 AH
Dimensions
Length, mm (in.) .......... 670.9 (26.4)
Width, mm (in.) .......... 499.0 (19.7)
Height, mm (in.) .......... 684.5 (26.9)
Dry weight, kg (lbs.) .......... 184 (406)
Kubota V2403 Maintenance Data
Fuel type .......... Diesel Fuel No.2-D
Engine oil type .......... SAE 10W-30 or 15W-40
Engine oil capacity .......... 9.5 L (2.51 gals.)
Coolant capacity .......... 8.4 L (2.22 gals.)
Oil filter change interval .......... Every 150 hours
Fuel filter change interval .......... Every 250 hours
Fan belt tension (Deflection) .......... 7-9 mm (0.28-0.35 in.)
Kubota V2403 Service Specifications
Cylinder Block
Cylinder Bore (Oversize) I.D. .......... 87.250-87.272 mm (3.4351-3.4359
in.)
Cylinder Maximum I.D. to Cylinder Minimum I.D. (Difference) ..........
0.15 mm (0.0059 in.)
Cylinder Block Bore I.D. .......... 40.000-40.025 mm (1.5748-1.5757 in.)
Cam Height (Intake) .......... 33.47 mm (1.318 in.)
Cam Height (Exhaust) .......... 33.00 mm (1.299 in.)
Top Ring to Ring Groove, Clearance .......... 0.050-0.090 mm
(0.0020-0.0035 in.)
Top Ring (Ring Gap) .......... 0.20-0.35 mm (0.0079-0.013 in.)
Second Ring to Ring Groove, Clearance .......... 0.0930-0.128 mm
0.00367-0.00503 in.
Oil Ring to Ring Groove, Clearance .......... 0.020-0.060 mm
0.00079-0.0023 in.
Second Ring (Ring Gap) .......... 0.40-0.55 mm 0.016-0.021 in.
Oil Ring (Ring Gap) .......... 0.25-0.45 mm 0.0099-0.017 in.
Crankshaft Journal to Crankshaft Bearing 1, Oil Clearance ..........
0.0400-0.118 mm (0.00158-0.00464 in.)
Crankshaft Journal O.D. .......... 59.921-59.940 mm (2.3591-2.3598 in.)
Crankshaft Bearing 1 I.D. .......... 59.980-60.039 mm (2.3615-2.3637
in.)
Crankshaft Journal to Crankshaft Bearing 2, Oil Clearance ..........
0.0400-0.104 mm (0.00158-0.00409 in.)
Crankshaft Journal O.D. .......... 59.921-59.940 mm (2.3591-2.3598 in.)
Crankshaft Bearing 2 I.D. .......... 59.980-60.025 mm (2.3615-2.3631
in.)
Crankpin to Crankpin Bearing, Oil Clearance .......... 0.025-0.087 mm
(0.00099-0.0034 in.)
Cylinder Head
Valve Clearance (When Cold) .......... 0.18-0.22 mm (0.0071-0.0086 in.)
Top Clearance .......... 0.60-0.70 mm (0.024-0.027 in.)
Cylinder Head Surface Flatness .......... 0.05 mm / 500 mm (0.002 in. /
19.7 in.)
Valve Recessing Recessing .......... 0.65-0.85 mm (0.026-0.033 in.)
Valve Stem to Valve Guide, Clearance .......... 0.040-0.070 mm
(0.0016-0.0027 in.)
Valve Spring (Setting Load / Setting Length) .......... 118 N / 35.0 mm
(26.5 lbf / 1.38 in.)
Valve Spring Tilt .......... 1.0 mm (0.039 in.)
Valve Seat Width (Intake/Exhaust) .......... 2.12 mm (0.0835 in.)
Valve Seat Angle (Intake/Exhaust) .......... 0.79 rad (45 deg)
Tappet to Tappet Guide, Oil Clearance .......... 0.020-0.062 mm
(0.00079-0.0024 in.)
Tappet O.D. .......... 23.959-23.980 mm (0.94327-0.94409 in.)
Tappet Guide I.D. .......... 24.000-24.021 mm (0.94489-0.94570 in.)
Oil System
Engine Oil Pressure At Idle Speed .......... More than 98 kPa (14 psi)
Engine Oil Pressure At Rated Speed .......... 300-440 kPa (43-64 psi)
Engine Oil Pressure Switch Working Pressure .......... 50 kPa (2 7 psi)
Inner Rotor to Outer Rotor, Clearance .......... 0.030-0.14 mm
(0.0012-0.0055 in.)
Outer Rotor to Pump Body, Clearance .......... 0.11-0.19 mm
(0.0044-0.0074 in.)
Inner Rotor to Cover, Clearance .......... 0.105-0.150 mm
(0.00414-0.00590 in.)
Cooling System
Fan Belt Tension .......... 7.0-9.0 mm (0.28-0.35 in.) deflection at 98
N (22 lbf) of force
Thermostat Valve Opening Temperature (When the valve starts-open)
.......... 80.5-83.5C (176.9-182.3F)
Thermostat Valve Opening Temperature (When the valve opened completely)
.......... 95C (203F)
Radiator Water Tightness .......... No leak at specified pressure
Radiator Cap Pressure Decreasing Time .......... More than 10 sec. for
pressure decrease from 90-60 kPa
Tightening Torque Specs
Injector clamp screw (M8x1.25), Nm (lb-ft) .......... 24-27 (18-20)
Cylinder head cover screw (M6x1.0), Nm (lb-ft) .......... 6.86-11.3
(5.06-8.33)
Injection pipe retaining nut (M12x1.5), Nm (lb-ft) .......... 24.5-29.4
(18.1-21.6)
Oil pressure switch screw (R1/8), Nm (lb-ft) .......... 15-19 (11-14)
Oil cooler joint screw (M20x1.5), Nm (lb-ft) .......... 40-44 (29-32)
Fan drive pulley mounting nut (M30x1.5), Nm (lb-ft) .......... 138-156
(102-115)
Camshaft set screw (M8x1.25), Nm (lb-ft) .......... 24-27 (18-20)
Balancer shaft set bolt (M8x1.25), Nm (lb-ft) .......... 24-27 (18-20)
Camshaft position sensor mounting screw, Nm (lb-ft) .......... 4-5 (3-4)
Crankshaft position sensor mounting screw, Nm (lb-ft) .......... 4-5
(3-4)
Rocker arm bracket screw (M8x1.25), Nm (lb-ft) .......... 24-27 (18-20)
Boost sensor mounting screw (M4x0.7), Nm (lb-ft) .......... 0.98-1.7
(0.73-1.3)
Glow lead mounting nut (M4x0.7), Nm (lb-ft) .......... 0.98-1.7
(0.73-1.3)
Glow plug (M10x1.25), Nm (lb-ft) .......... 15-19 (11-14)
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KUBOTA TRACTORS SPECIFICATIONS |
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KUBOTA ENGINES DATA AND SERVICE SPECS |
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KUBOTA FRONT END LOADERS |
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KUBOTA TRACTORS TROUBLESHOOTING | ||||
L235 | L2501 | L2550 | L275 | L3110 |
L3301 | L35 | L3710 | L3901 | L4310 |
L5030 | M4700 | M5700 | M6040 | M6800 |
M8200 | M8540 | M9000 | MX5100 | MX5200 |