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Kubota EA300-E2-NB1 Workshop Manual

Ea 300-e2 series; ea 300-el series

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Table of Contents

Introduction
Safety Precautions
Before Servicing and Repairing
Safety Starting
Safety Working
Avoid Fires
Ventilate Work Area
Dispose of Fluids Properly
Prevent Acid Burns
Prepare for Emergencies
Specifications
Performance Curves
Dimensions (EA300-E2-NB1)
Dimensions (EA300-E2-NB1-APU)
Dimensions (EL300-E2-AR)
Dimensions (EL300-E2-KCL)
Pulley Shaft (EA300-E2-NB1, EA300-E2-NB1-APU, EL300-E2-AR-KCL)
V-Pulley (EL300-E2-AR)
Flywheel
Contents
Engine Identification
Model Name and Engine Serial Number
Engine Serial Number
Year of Manufacture
Month of Manufacture
General Precautions
E2 Engine
Maintenance Check List
Lubricating Oil
Lubricating Oil Recommended When a Low-Sulfur or High-Sulfur Fuel Is Employed
Check and Maintenance
Daily Check List
Checking Coolig Water Level (Daily)
Checking Engine Oil Level (Daily)
Check Point of Every 50 Hours
Check Points of Every 100 Hours
Cleaning Air Cleaner Element
Changing Engine Oil and Cleaning Oil Strainer (First 50 Hours and Every 100 Hours)
Special Tools
Special Use Puller Set
Piston Ring Compressor
Piston Ring Tool
Socket Wrench 29
Flywheel Puller
Red Check
Radiator Tester
Conecting Rod Alignment Tool
Nozzle Tester
Plastigage
Diesel Engine Compression Tester
Oil Pressure Tester
Valve Seat Cutter
Valve Guide Replacing Tool
Rocker Arm Bushing Replacing Tool
Idle Gear Bushing Replacing Tool
Piston Pin Bushing Replacing Tool
Crankshaft Main Bearing 1 Iserting Tool
Flywheel Stopper
Crank Gear Puller
Ction Pump Pressure Tester
Feature
Figure Shows EA300 Engine
Engine Body
Cylinder Head
Valve Mechanism
Valve Guide
Valve Timing
Cylinder Block and Cylinder Liner
Crankshaft and Crankshaft Journal Bearing
Piston and Piston Ring
Conecting Rod and Connecting Rod Bearing
Timing Gear
Camshaft
Dynamic Balancer
Lubricating System
General
Oil Pump
Oil Strainer
Relief Valve
Oil Signal
Oil Pressure Switch
Cooling System
Radiator
Radiator Cap Function
When Radiator Pressure Is High
When Radiator Pressure Is Negative
Intake/Exhaust System
Air Cleaner
Muffler
Fuel System
Injection Pump
Fuel Pressure-Feed Stroke to Injection Nozzle
Fuel Suction
Fuel Pressure-Feeding Commencement
Regulating Fuel Injection
No Fuel Delivery...engine Stopped
Fuel Injection...small to Medium
Fuel Injection...maximum
Delivery Valve
Delivery Valve Operation
Non-Return Function
Reverse Suction Function (Dripping Prevention)
Injection Nozzle
Dumping Valve
At Fuel Injection
At Suck-Back
Governor Mechanism
At Starting
At Idling
At Idling to Maximum Speed
At Maximum Engine Speed
At Engine Stop
Fuel Filter
Fuel Limiter Apparatus Construction
Electrical System (EA300-E2-NB1)
Fan Dynamo
Power Generating Performance
Starter
Starting Motor
Overrunning Clutch
Armature Brake
Magnet Switch
Operation of Starter
When Starter Switch Is Turned to Start Position
When Contact Plate Is Closed
When Starter Switch Is Released
Troubleshooting
Servicing Specifications
Tightening Torques
Tightening Torques for Special Use Screws, Bolts and Nut
Tightening Torques for General Use Screws, Bolts and Nut
Checking, Disassembling and Servicing
Checking and Adjusting
Compression Pressure
Decompression Device
Valve Clearance
Top Clearance
Engine Oil Pressure
Fan Belt Tension
Fan Belt Damage and Wear
Radiator Water Tightness
Radiator Cap Air Leakage
Adjusting Ijection Timing
Pump Element Fuel Tightness
Delivery Valve Fuel Tightness
Fuel Injection Pressure
Fuel Tightness of Nozzle Valve Seat
Nozzle Spraying Condition
Glow Plug (EA300-NB1)
Power Generation Performance
Motor Test
Glow Plug Disconnection/Short-Circuit Test
Disassembling and Adjusting
Draining Water and Oil
External Components
Draining Coolant and Engine Oil
Fuel Tank and Filter
Wire Harness
Fan Cover and Starter
Cooling Fan
Injection Pipe and Nozzle Holder
Nozzle Heat Seal Service Removal Procedure
Cylinder Head Cover
Rocker Arm Bracket and Push Rod
Valve
Piston and Connecting Rod
Crankcase Cover
Connecting Rod Cap
Piston Ring and Connecting Rod
Gear Case
Oil Pump Cover and Oil Pump
Cam Gear and Camshaft
Idle Gear
Balancer Gear and Balancer
Reassembling Procedure of Gears
Governor Lever
Starting Shaft
Breather
Governor Weight
Flywheel and Crankshaft
Pulley Shaft
Flywheel Nut
Crankshaft and Main Bearing Case
Main Bearing Case and Crankshaft
Main Bearing and Crank Shaft
Crank Gear and Main Bearing
Tappet
End Frame
Brush Holder
Yoke
Armature
Servicing
Cylinder Head and Valves
Cylinder Head Surface Flatness
Cylinder Head Flaw
Valve Recessing
Width of Contact between Valve and Valve Seat
Cylinder Wear
Correcting Procedure for Valve Seat
Correcting Valve Seating (Valve Lapping)
Oil Clearance between Valve Stem and Valve Guide
Replacing Valve Guide
Valve Spring Free Length and Tension
Valve Spring Squareness
Oil Clearance between Rocker Arm Shaft and Bushing
Oil Clearance between Tappet and Guide
Push Rod Alignmet
Piston Skirt O.D.
Piston Pin Bore
Oil Clearance between Piston Pin and Bushing
Replacing Piston Pin Bushing
Connecting Rod Alignment
Piston Ring Gap
Clearance between Piston Ring and Ring Groove
Crankshaft
Oil Clearance between Crank Pin and Bearing
Use of under Size Bearing and Crank Pin Correction
Under Size Bearing and Crankshaft Dimension
End Play of Crankshaft
Oil Clearance between Crankshaft and Oil Filler Ring
Timing Gear and Camshaft
Timing Gear Backlash
Side Clearance of Idle Gear
Side Clearance of Cam Gear
Oil Clearance between Idle Gear Shaft and Bushing
Replacing Idle Gear Bushing
Oil Clearance of Camshaft
Intake and Exhaust Cam Height
Cylinder Liner ID
Replacing Cylinder Liner
Projection of Cylinder Liner
Clearance between Inner Rotor and Outer Rotor
Clearance between Outer Rotor and Pump Body
Clearance between Rotor and Cover
Continuity Across Terminal
Pull-In Coil (Attraction Test)
Holding Coil (Retension Test)
Shaft Thrust Gap
Commutator and Mica
Clearance between Shaft and Bushing
Armature Coil
Brush Wear
Field Coil
Bearing and Clutch

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Ea300-e2-nb1-apu El300-e2-ar El300-e2-ar-kcl

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