Doosan DH450 Excavator Service Repair Manual – PDF DOWNLOAD
DESCRIPTION:
Doosan DH450 Excavator Service Repair Manual – PDF DOWNLOAD
FOREWARD
- This maintenance manual is designed to serve as a reference for distributors of DHL To maintain the excavator in optimum condition and retain maximum performance for a long time, CORRECT OPERATION and PROPER MAINTENANCE are essential.
- This manual is in detail explained about Specifications, Operation Principle, Diassembly, and Reassembly, Troubleshooting and Maintenance Standard. Therefore, when the machine goes wrong, repair the machine by correct procedure after reading this manual.
- If you have any question air or recommendation in connection with this manual, please do not hesitate to contact our overseas service department or branch office in your territory. DAEWOO HEAVY
- Daewoo reserves the right to improve our products in a continuing process to provide the best possible product to the market place. These improvements can be implemented at any time with no obligation to change materials on previously sold products.
- It is recommended that consumers periodically contact their distributors for recent documentation on purchased equipment. This documentation may include attachments and optional equipment that is not available in your machine’s package.
- Please call your distributor for additional items that you may require. Illustrations used throughout this manual are used only as a representation of the actual piece of equipment, and may vary from the actual item. 2023-
- TABLE OF CONTENTS:
Doosan DH450 Excavator Service Repair Manual – PDF DOWNLOAD
GENERAL INFORMATION
Engine Specification
Perspective View
Combustion System
Engine Block
Piston/conrod/crank Assembly
Air Cleaners
Engine Timing
Fuel System
Fuel Filter
Injection Pump
Injection
Engine Lubricating Circuits
Oil Cooler With Oil Filter
Cooling System
Turbocharger
SECTION ENGINE ASSEMBLY
Checking Compression
Removing and Installing Oil Spray Jets
Detaching, Attaching Timing Case, Replacing Seal and
Checking Cam Shaft Axial Play
Removing and Installing Cylinder Liners
Removing and Installing Pilot Bearing
Removing and Installing Flywheel
Replacing Flywheel Ring Gear
Replacing Crankshaft Rear Oil Seal
Replacing Crankshaft Front Oil Seal
Removing and Installing Crankshaft
Replacing Conrod Bearings
Measuring Piston Protrusion
Removing and Installing Piston With Connecting rod
Replacing Piston Rings
Detaching, Attaching Piston and Checking Conrod
Removing and Installing Cylinder head
Adjusting Valves
Removing and Installing Valves ,
Removing and Installing Valve Seats
Removing and Installing Valve Guides
Removing and Installing Camshaft
SECTION LUBBRICATING SYSTEM
Removing and Installing Oil Pan
Replacing Oil
Removing and Installing Oil Cooler
Removing and Installing Oil Pump
Removing and Installing Oil separator
SECTION ENGINE ASSEMBLY
Replacing Water Pump
Removing and Installing Water Pump
Replenishing Cooling Water
Removing and Installing Mechanical Seal
SECTION FUEL SYSTEM
Adjusting Injection Timing
Removing and Installing Injection Nozzle
Checking and Replacing Injection Nozzle
Removing and Installing Injection Pump
Removing and Installing Intake Manifold
Removing and Installing Exhaust Manifold
SECTION TURBOCHARGER
Removing and Installing Turbocharger
Checking Rotor Shaft Axial Play
Checking Rotor Shaft Radial Play
SECTION SUPPLEMENT
Trouble Shooting For Engine
Torque Specifications
Maintenance Specifications
HYDRAULIC EQUIPMENT INDEX PAGE
SECTION
SECTION
SECTION
SPECIFICATION
OPERATION PRINCIPLE
UPPER STUCTURE
Structure
Hydraulic Pumps
(Main Pump, Pilot Pump and Swing Pump)
Control Block(Valve)
Swing Motor,
Center Joint ,
Swing Bearing
Remote Control Valve(Joystick)
Travel Control Valve(Pedal)
Accumulator
SECTION UNDERCARRAGE
Structure ”
Travel Device
Front Idler
Lower Roller
Upper Roller
SECTION HYDRAULIC CYLINDER
SECTION ELECTRICAL SYSTEM
SECTION
SECTION
SECTION
System Overview
Battery
Engine Starting System
Engine Stop System
Engine Speed Control System
Engine Preheating System
Charging System ,
EPOS
Brake Circuit(Swing and Travel)
Monitoring System
Windshield wiper
Car radio and Cassette
Air Conditioning System
PERFORMANCE STANDARD
HYDRAULIC SYSTEM TROUBLESHOOTING
TESTING AND ADJUSTING
HYDRAULIC CIRCUIT DIAGRAM
ELECTRIC CIRCUIT DIAGRAM
Maker and Model
DAEWOO DT
Type Water combustion chamber(direct injection)
Combustion chamber type ”
Toroidal combustion chamber(direct injection)
Total displacement(
Compression Ratio
Low/High idle speed
Rated Horsepower
Injection timing
Injection order
Injection pump type
flange connected inline type
Governor type
Timer type
Auto centrifugal type
Injection pressure
Intake valves open at
Intake valves close at
Exhaust valves open at
Exhaust valves close at
Oil pump type
ear type
Oil cooler type
Water cooled
Water pump type
Centrifugal type
Thermostat type
Wax pallet
Starter output
Alternator
Coolant capacity
Engine oil capacity /(in oil pan)
Engine weight
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- This is the same manual used by the DEALERSHIPS to SERVICE your vehicle.
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