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Kubota V3307 Engine

General Technical Data

Kubota V3307 Engine Specifications

Engine Model .............. Kubota V3307
Engine Type .............. 4-Stroke, vertical, water-cooled diesel
Number of Cylinders .............. 4
Total displacement, cc (cu.in) .............. 3331 (203.3)
Engine Bore, mm (in) .............. 94.0 (3.70)
Engine Stroke, mm (in) .............. 120.0 (4.72)
Rated Engine Power, hp (kW) .............. 74.3 (55.4)
Rated Engine Speed, rpm .............. 2600
Maximum Engine Speed, rpm .............. 2820
Idle Speed, rpm .............. 775-825
Compression Ratio .............. 20:1
Firing Order .............. 1-3-4-2
Lubrication System .............. Forced lubrication by trochoid pump
Oil Filter Type .............. Full Flow Paper

Fuel System

Fuel System Type .............. Direct injection
Fuel Injection Pump .............. Bosch PFR4KZ
Injection Nozzle .............. Bosch P type
Governor Type .............. All speed mechanical governor
Injection Pressure, MPa (psi) .............. 18.63 (2702) 1st stage, 22.56 (3271) 2nd stage
Injection Timing, rad (deg) .............. 0.023 (1.3) after T.D.C.

Electrical System

Electrical System Rating, Volts .............. 12
Starter Type .............. Electric
Starting Motor .............. 12V, 3.0 kW
Charging Alternator .............. 12V, 540W
Battery Rating .............. 12V, 120AH

Dimensions

Length, mm (in) .............. 674 (26.6)
Width, mm (in) .............. 506 (19.9)
Height, mm (in) .............. 739 (29.1)
Dry Weight, kg (lbs) .............. 275 (605)

Kubota V3307 Maintenance Data

Cylinder Block and Valves

Cylinder Bore I.D. (Maximum), mm (in) .............. 94.15 (3.707)
Cylinder Head (Maximum Out of Flatness), mm (in) .............. 0.05 (0.002)
Intake Valve Clearance, mm (in) .............. 0.13-0.17 (0.0052-0.0068)
Exhaust Valve Clearance, mm (in) .............. 0.13-0.17 (0.0052-0.0068)

Engine Oil and Filter

Engine Oil Type .............. SAE20, SAE30, 10W-30
Oil Classification .............. API CF, CF-4, CG-4, CH-4 or CI-4
Oil Capacity, L (qts) .............. 11.2 (11.9)
Oil Filter Part Number .............. HH1C0-32430

Service Intervals

Service Air Cleaner Element .............. Every 250 hours
Service Fuel Filter (Element Type) .............. Every 250 hours
Change Engine Oil .............. Every 500 hours
Change Oil Filter Cartridge .............. Every 500 hours
Replace Fuel Filter Cartridge .............. Every 500 hours
Replace Fan Belt .............. Every 500 hours
Check and Adjust Valve Clearance .............. Every 1000 hours
Replace Air Cleaner Element .............. Every 1500 hours
Check Fuel Injection Pump .............. Every 3000 hours

Kubota V3307 Service Specifications

Cylinder Block

Compression Pressure .............. 3.92 MPa (569 psi)
Cylinder Bore I.D (Standard) .............. 94.000-94.022 mm (3.7008-3.7016 in.)
Cylinder Bore I.D (Wear Limit) .............. 94.15 mm (3.707 in.)
Cylinder Bore Oversize I.D (Standard) .............. 94.500-94.522 mm (3.7205-3.7213 in.)
Cylinder Bore Oversize I.D (Wear Limit) .............. 94.65 mm (3.726 in.)
Rocker Arm Shaft to Rocker Arm Clearance .............. 0.016-0.045 mm (0.00063-0.0017 in.)
Rocker Arm Shaft O.D .............. 14.973-14.984 mm (0.58949-0.58992 in.)
Rocker Arm I.D .............. 15.000-15.018 mm (0.59056-0.59125 in.)
Tappet to Tappet Bore Clearance .............. 0.020-0.050 mm (0.00079-0.0019 in.)
Tappet O.D .............. 9.965-9.980 mm (0.3924-0.3929 in.)
Tappet Bore I.D .............. 10.000-10.015 mm (0.39370-0.39429 in.)
Connecting Rod Alignment .............. 0.05 mm (0.002 in.)

Cylinder Head and Valves

Cylinder Head Surface Flatness .............. 0.05 mm (0.002 in.)
Valve Clearance (Cold) .............. 0.13-0.17 mm (0.0052-0.0068 in.)
Top Clearance .............. 0.60-0.80 mm (0.024-0.031 in.)
Valve Recessing (Intake and Exhaust) .............. 0.65-0.85 mm (0.026-0.033 in.)
Valve Stem to Valve Guide Clearance .............. 0.055-0.085 mm (0.0022-0.0033 in.)
Valve Stem O.D .............. 6.960-6.975 mm (0.2741-0.2746 in.)
Valve Guide I.D .............. 7.030-7.045 mm (0.2768-0.2773 in.)
Valve Face Angle (Intake and Exhaust) .............. 0.79 rad (45 deg)
Valve Seat Angle (Intake and Exhaust) .............. 0.79 rad (45 deg)
Valve Seat Width (Intake and Exhaust) .............. 3.3-3.6 mm (0.13-0.14 in.)
Intake Valve Timing (Open) .............. 0.24 rad (14 deg) before T.D.C.
Intake Valve Timing (Close) .............. 0.70 rad (40 deg) after B.D.C.
Exhaust Valve Timing (Open) .............. 0.87 rad (50 deg) before B.D.C.
Exhaust Valve Timing (Close) .............. 0.24 rad (14 deg) after T.D.C.
Valve Spring Free Length (Standard) .............. 35.1-35.6 mm (1.39-1.40 in.)
Valve Spring Free Length (Wear Limit) .............. 34.6 mm (1.36 in.)

Piston and Piston Rings

Piston Pin Bore I.D (Standard) .............. 28.000-28.013 mm (1.1024-1.1028 in.)
Piston Pin Bore I.D (Wear Limit) .............. 28.05 mm (1.104 in.)
Piston Pin to Small End Bushing Clearance .............. 0.020-0.040 mm (0.00079-0.0015 in.)
Piston Pin O.D .............. 28.006-28.011 mm (1.1026-1.1027 in.)
Small End Bushing I.D .............. 28.031-28.046 mm (1.1036-1.1041 in.)
Top Ring Gap .............. 0.25-0.40 mm (0.0099-0.015 in.)
Second Ring Gap .............. 0.30-0.45 mm (0.012-0.017 in.)
Oil Ring Gap .............. 0.25-0.45 mm (0.0099-0.017 in.)
Top Ring Groove Clearance .............. 0.050-0.090 mm (0.0020-0.0035 in.)
Second Ring Groove Clearance .............. 0.090-0.12 mm (0.0035-0.0047 in.)
Oil Ring Groove Clearance 0.020-0.060 mm (0.00079-0.0023 in.)

Crankshaft

Crankshaft Side Clearance .............. 0.15-0.35 mm (0.0059-0.013 in.)
Crankshaft Alignment .............. 0.02 mm (0.0008 in.)
Crank Pin to Crank Pin Bearing Clearance .............. 0.017-0.048 mm (0.00067-0.0018 in.)
Crank Pin O.D .............. 49.980-49.991 mm (1.9678-1.9681 in.)
Crankshaft Journal to Crankshaft Bearing Clearance .............. 0.030-0.073 mm (0.0012-0.0028 in.)
Crankshaft Journal O.D .............. 79.977-79.990 mm (3.1487-3.1492 in.)

Camshaft

Camshaft Side Clearance .............. 0.10 mm (0.0039 in.)
Camshaf Alignment .............. 0.01 mm (0.0004 in.)
Cam Height (Intake) .............. 37.50-37.00 mm (1.476-1.457 in.)
Cam Height (Exhaust) .............. 37.90-37.40 mm (1.492-1.472 in.)
Camshaft Oil Clearance .............. 0.050-0.091 mm (0.0020-0.0035 in.)
Camshaft Journal 1 O.D .............. 34.934-34.950 mm (1.3754-1.3759 in.)
Cylinder Block Bore 1 I.D .............. 35.000-35.025 mm (1.3780-1.3789 in.)
Camshaft Journal 2 O.D .............. 43.934-43.950 mm (1.7297-1.7303 in.)
Cylinder Block Bore 2 I.D .............. 44.000-44.025 mm (1.7323-1.7332 in.)

Kubota V3307 Tightening Torque Specs

Cylinder head mounting screw (M14x1.5), Nm (lb-ft) .............. 187-196 (138-144)
Cylinder head cover screw (M6x1.0), Nm (lb-ft) .............. 9.81-11.2 (7.24-8.31)
Rocker arm bracket screw (M10x1.25), Nm (lb-ft) .............. 49-55 (37-41)
Camshaft set screw (M8x1.25), Nm (lb-ft) .............. 24-27 (18-20)
Connecting rod screw (M9x1.0), Nm (lb-ft) .............. 69-73 (51-54)
Crankshaft screw (M16x1.5), Nm (lb-ft) .............. 255-274 (188-202)
Flywheel housing mounting screw (M12x1.25), Nm (lb-ft) .............. 103-117 (76.0-86.7)
Flywheel screw (M12x1.25), Nm (lb-ft) .............. 98.1-107 (72.4-79.5)
Injection pump gear mounting nut (M16x1.5), Nm (lb-ft) .............. 138-158 (102-115)
Oil cooler joint screw (M20x1.5), Nm (lb-ft) .............. 40-44 (29-32)
Front cover mounting screw (M8x1.25), Nm (lb-ft) .............. 30-34 (22-25)
Idle gear mounting screw (M8x1.25), Nm (lb-ft) .............. 30-34 (22-25)
Injection pipe retaining nut (M12x1.5), Nm (lb-ft) .............. 23-36 (17-26)
Nozzle holder clamp screw (M8x1.25), Nm (lb-ft) .............. 24-27 (18-20)
Oil pump cover screw (M6), Nm (lb-ft) .............. 7.9-9.3 (5.8-6.8)

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