Kubota EA300-E2-NB1 - Rough Engine Operation Causes; Exhaust Gas Color Abnormalities; Engine Output Deficiencies

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Introduction2
Safety Precautions3
Before Servicing and Repairing3
Safety Starting3
Safety Working4
Avoid Fires4
Ventilate Work Area5
Dispose of Fluids Properly5
Prevent Acid Burns5
Prepare for Emergencies5
Specifications6
Performance Curves8
Dimensions (EA300-E2-NB1)9
Dimensions (EA300-E2-NB1-APU)10
Dimensions (EL300-E2-AR)11
Dimensions (EL300-E2-KCL)12
Pulley Shaft (EA300-E2-NB1, EA300-E2-NB1-APU, EL300-E2-AR-KCL)13
V-Pulley (EL300-E2-AR)13
Flywheel13
Contents14
Engine Identification15
Model Name and Engine Serial Number15
Engine Serial Number15
Year of Manufacture15
Month of Manufacture16
General Precautions17
E2 Engine18
Maintenance Check List19
Lubricating Oil19
Lubricating Oil Recommended When a Low-Sulfur or High-Sulfur Fuel Is Employed19
Check and Maintenance20
Daily Check List20
Checking Coolig Water Level (Daily)20
Checking Engine Oil Level (Daily)20
Check Point of Every 50 Hours21
Check Points of Every 100 Hours21
Cleaning Air Cleaner Element21
Changing Engine Oil and Cleaning Oil Strainer (First 50 Hours and Every 100 Hours)21
Special Tools23
Special Use Puller Set23
Piston Ring Compressor23
Piston Ring Tool23
Socket Wrench 2924
Flywheel Puller24
Red Check24
Radiator Tester24
Conecting Rod Alignment Tool25
Nozzle Tester25
Plastigage25
Diesel Engine Compression Tester25
Oil Pressure Tester26
Valve Seat Cutter26
Valve Guide Replacing Tool26
Rocker Arm Bushing Replacing Tool27
Idle Gear Bushing Replacing Tool27
Piston Pin Bushing Replacing Tool27
Crankshaft Main Bearing 1 Iserting Tool28
Flywheel Stopper28
Crank Gear Puller29
Ction Pump Pressure Tester30
Feature32
Figure Shows EA300 Engine32
Engine Body33
Cylinder Head33
Valve Mechanism35
Valve Guide35
Valve Timing36
Cylinder Block and Cylinder Liner37
Crankshaft and Crankshaft Journal Bearing37
Piston and Piston Ring38
Conecting Rod and Connecting Rod Bearing38
Timing Gear39
Camshaft39
Dynamic Balancer40
Lubricating System41
General41
Oil Pump42
Oil Strainer42
Relief Valve43
Oil Signal43
Oil Pressure Switch43
Cooling System44
Radiator44
Radiator Cap Function45
When Radiator Pressure Is High45
When Radiator Pressure Is Negative45
Intake/Exhaust System46
Air Cleaner46
Muffler46
Fuel System47
Injection Pump48
Fuel Pressure-Feed Stroke to Injection Nozzle48
Fuel Suction48
Fuel Pressure-Feeding Commencement48
Regulating Fuel Injection49
No Fuel Delivery...engine Stopped49
Fuel Injection...small to Medium49
Fuel Injection...maximum49
Delivery Valve50
Delivery Valve Operation50
Non-Return Function50
Reverse Suction Function (Dripping Prevention)50
Injection Nozzle51
Dumping Valve51
At Fuel Injection51
At Suck-Back51
Governor Mechanism52
At Starting52
At Idling52
At Idling to Maximum Speed53
At Maximum Engine Speed53
At Engine Stop53
Fuel Filter54
Fuel Limiter Apparatus Construction54
Electrical System (EA300-E2-NB1)55
Fan Dynamo56
Power Generating Performance56
Starter57
Starting Motor58
Overrunning Clutch59
Armature Brake59
Magnet Switch60
Operation of Starter61
When Starter Switch Is Turned to Start Position61
When Contact Plate Is Closed61
When Starter Switch Is Released61
Troubleshooting63
Servicing Specifications67
Tightening Torques72
Tightening Torques for Special Use Screws, Bolts and Nut72
Tightening Torques for General Use Screws, Bolts and Nut73
Checking, Disassembling and Servicing74
Checking and Adjusting74
Compression Pressure74
Decompression Device75
Valve Clearance76
Top Clearance77
Engine Oil Pressure78
Fan Belt Tension79
Fan Belt Damage and Wear79
Radiator Water Tightness80
Radiator Cap Air Leakage80
Adjusting Ijection Timing81
Pump Element Fuel Tightness81
Delivery Valve Fuel Tightness82
Fuel Injection Pressure83
Fuel Tightness of Nozzle Valve Seat83
Nozzle Spraying Condition83
Glow Plug (EA300-NB1)84
Power Generation Performance84
Motor Test84
Glow Plug Disconnection/Short-Circuit Test84
Disassembling and Adjusting85
Draining Water and Oil85
External Components85
Draining Coolant and Engine Oil85
Fuel Tank and Filter86
Wire Harness86
Fan Cover and Starter86
Cooling Fan87
Injection Pipe and Nozzle Holder88
Nozzle Heat Seal Service Removal Procedure88
Cylinder Head Cover88
Rocker Arm Bracket and Push Rod89
Valve90
Piston and Connecting Rod91
Crankcase Cover91
Connecting Rod Cap92
Piston Ring and Connecting Rod94
Gear Case95
Oil Pump Cover and Oil Pump96
Cam Gear and Camshaft97
Idle Gear97
Balancer Gear and Balancer97
Reassembling Procedure of Gears98
Governor Lever98
Starting Shaft99
Breather99
Governor Weight100
Flywheel and Crankshaft101
Pulley Shaft101
Flywheel Nut102
Crankshaft and Main Bearing Case102
Main Bearing Case and Crankshaft103
Main Bearing and Crank Shaft103
Crank Gear and Main Bearing104
Tappet104
End Frame105
Brush Holder106
Yoke106
Armature106
Servicing107
Cylinder Head and Valves107
Cylinder Head Surface Flatness107
Cylinder Head Flaw107
Valve Recessing108
Width of Contact between Valve and Valve Seat108
Cylinder Wear108
Correcting Procedure for Valve Seat109
Correcting Valve Seating (Valve Lapping)109
Oil Clearance between Valve Stem and Valve Guide110
Replacing Valve Guide110
Valve Spring Free Length and Tension111
Valve Spring Squareness111
Oil Clearance between Rocker Arm Shaft and Bushing112
Oil Clearance between Tappet and Guide112
Push Rod Alignmet112
Piston Skirt O.D.113
Piston Pin Bore113
Oil Clearance between Piston Pin and Bushing113
Replacing Piston Pin Bushing114
Connecting Rod Alignment114
Piston Ring Gap115
Clearance between Piston Ring and Ring Groove115
Crankshaft116
Oil Clearance between Crank Pin and Bearing116
Use of under Size Bearing and Crank Pin Correction117
Under Size Bearing and Crankshaft Dimension117
End Play of Crankshaft118
Oil Clearance between Crankshaft and Oil Filler Ring118
Timing Gear and Camshaft119
Timing Gear Backlash119
Side Clearance of Idle Gear119
Side Clearance of Cam Gear119
Oil Clearance between Idle Gear Shaft and Bushing120
Replacing Idle Gear Bushing120
Oil Clearance of Camshaft121
Intake and Exhaust Cam Height121
Cylinder Liner ID122
Replacing Cylinder Liner122
Projection of Cylinder Liner123
Clearance between Inner Rotor and Outer Rotor123
Clearance between Outer Rotor and Pump Body123
Clearance between Rotor and Cover124
Continuity Across Terminal124
Pull-In Coil (Attraction Test)124
Holding Coil (Retension Test)124
Shaft Thrust Gap125
Commutator and Mica125
Clearance between Shaft and Bushing126
Armature Coil126
Brush Wear126
Field Coil127
Bearing and Clutch127

Kubota EA300-E2-NB1 - Rough Engine Operation Causes; Exhaust Gas Color Abnormalities; Engine Output Deficiencies

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