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Kubota V2403T Engine

Kubota V2403T Engine Technical Data

General Specifications

Engine model ..................... Kubota V2403-T
Engine type ..................... 4-stroke vertical turbocharged diesel
Number of cylinders ..................... 4
Total displacement, L (cu.in) ..................... 2.44 (148.6)
Cylinder bore, mm (in) ..................... 87.0 (3.43)
Piston stroke, mm (in) ..................... 102.4 (4.04)
Gross power, kW (Hp) ..................... 44.0 (59.0)
Net power, kW (Hp) ..................... 36.4 (49.0)
Maximum speed, rpm ..................... 2950
Idle speed, rpm ..................... 750-800
Aspiration type ..................... Turbocharged
Firing order ..................... 1-3-4-2
Compression ratio ..................... 23:1
Combustion chamber ..................... Spherical type
Direction of rotation ..................... Counter-clockwise
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) ..................... 9.5 (10.1)
Starting system ..................... Electric starting with starter
Electrical system rating, Volts ..................... 12

Fuel System

Injection pump ..................... Bosch type mini pump
Injection nozzle ..................... OPD, mini nozzle
Injection pressure, kPa (psi) ..................... 13730 (1990)
Injection timing, deg (rad) ..................... 8.3 (0.14) before TDC
Governor type ..................... Mechanical

Dimensions and Weight

Overall Length, mm (in) ..................... 667 (26.3)
Overall Width, mm (in) ..................... 450.0 (19.7)
Overall Height, mm (in) ..................... 737 (29.0)
Dry Weight, kg (lbs) ..................... 190 (419)

Kubota V2403T Maintenance Data

Engine Oil

Engine oil type ..................... SAE 10W-30, 10W-40
Oil classification (API service) ..................... CD, CF, or CE
Engine oil capacity, L (qts) ..................... 9.5 (10.1)

Engine Filters

Oil filter part number ..................... HH164-32430
Fuel filter part number ..................... 15521-43160
Air filter part number ..................... 59800-26110, 3A111-19130

Service Intervals

Check Fuel Pipes ..................... Every 50 hours
Service Air Filter ..................... Every 100 hours
Clean Fuel 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 500 hours
Check Valve Clearance ..................... Every 800 hours
Replace Air Filter ..................... Every 1000 hours
Check Injection Nozzles ..................... Every 1500 hours
Change Engine Coolant ..................... Every 2000 hours

Kubota V2403T Service Specifications

Cylinder Block

Cylinder Bore I.D (Std) ..................... 87.000-87.022 mm (3.42519-3.42606 in)
Cylinder Bore I.D (Wear Limit) ..................... 87.172 mm (3.43196 in)
Cylinder Bore I.D (Oversize) ..................... 87.250-87.272 mm (3.4351-3.4359 in)
Connecting Rod Alignment ..................... 0.05 mm (0.0020 in)
Connecting Rod Small End Bushing I.D ..................... 22.025-22.040 mm (0.8671-0.8677 in)
Crankshaft Alignment – 0.02 mm (0.00079 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)
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)
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)
Crankpin to Crankpin Bearing Oil 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)

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 ..................... 0.60-0.70 mm (0.024-0.028 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) ..................... 0.79 rad (45 deg)
Valve Seat Angle (Exhaust) ..................... 0.79 rad (45 deg)
Valve Spring Free Length ..................... 41.7-42.2 mm (1.6417-1.6614 in)
Valve Opening (Intake) ..................... 20 deg (0.35 rad) before T.D.C.
Valve Closing (Intake) ..................... 45 deg (0.79 rad) after B.D.C.
Valve Opening (Exhaust) ..................... 50 deg (0.87 rad) before B.D.C.
Valve Closing (Exhaust) ..................... 12 deg (0.21 rad) after T.D.C.
Rocker Arm Shaft to Rocker Arm Clearance ..................... 0.016-0.045 mm (0.0006-0.0018 in)
Rocker Arm Shaft O.D ..................... 13.973-13.984 mm (0.55012-0.55055 in)
Rocker Arm I.D ..................... 14.000-14.018 mm (0.55118-0.55189 in)
Camshaft Side Clearance ..................... 0.07-0.22 mm (0.0028-0.0087 in)
Camshaft Alignment ..................... 0.01 mm (0.0004 in)
Camshaft Journal O.D ..................... 39.934-39.950 mm (1.57221-1.57284 in)
Camshaft Journal to Cylinder Bore Clearance ..................... 0.050-0.091 mm (0.00197-0.00358 in)
Cam Height (Intake) ..................... 33.85-33.90 mm (1.333-1.335 in)
Cam Height (Exhaust) ..................... 33.22-33.27 mm (1.308-1.310 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)
Top Ring Groove Clearance (Std) ..................... 0.050-0.090 mm (0.0020-0.0035 in)
Top Ring Groove Clearance (Wear Limit) ..................... 0.20 mm (0.0079 in)
Second Ring Groove Clearance (Std) ..................... 0.093-0.128 mm (0.0037-0.0050 in)
Second Ring Groove Clearance (Wear Limit) ..................... 0.20 mm (0.0079 in)
Oil Ring Groove Clearance (Std) ..................... 0.020-0.060 mm (0.0008-0.0023 in)
Oil Ring Groove Clearance (Wear Limit) ..................... 0.15 mm (0.0059 in)
Top Ring End Gap (Std) ..................... 0.20-0.35 mm (0.0079-0.0138 in)
Second Ring End Gap (Std) ..................... 0.40-0.55 mm (0.0157-0.0210 in)
Oil Ring End Gap (Std) ..................... 0.25-0.45 mm (0.0099-0.0170 in)
Ring End Gap (Wear Limit) ..................... 1.25 mm (0.0492 in)

Torque Specifications

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)
Supply pump mounting nut (M8x1.25), Nm (lb-ft) ..................... 24-27 (18-20)
Oil pressure switch screw (R1/8), Nm (lb-ft) ..................... 15-19 (11-14)
Alternator’s pulley nut, Nm (lb-ft) ..................... 58.3-78.9 (43.0-58.2)

KUBOTA TRACTORS TROUBLESHOOTING
L235	L2501	L2550	L275	L3110
L3301	L35	L3710	L3901	L4310
L5030	M4700	M5700	M6040	M6800
M8200	M8540	M9000	MX5100	MX5200