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Daewoo Doosan DD80 & DD80L Shop Manual 5023-7070E – PDF DOWNLOAD
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Description
Daewoo Doosan DD80 & DD80L Shop Manual 5023-7070E – PDF DOWNLOAD
DESCRIPTION:
Daewoo Doosan DD80 & DD80L Shop Manual 5023-7070E – PDF DOWNLOAD
- DOOSAN 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.
TO THE OPERATOR OF A DOOSAN DAEWOO DOZER
- Unsafe use of the dozer could lead to serious injury or death. Operating procedures, maintenance and equipment practices or traveling or shipping methods that do not follow the safety guidelines on the following pages could cause serious, potentially fatal injuries or extensive damage to the machine or nearby property
- Please respect the importance of taking responsibility for your own safety, and that of other people who may be affected by your actions
- The safety information on the following pages is organized into the following sections
1. “General Safety Essentials” on page 4
2. “Location of Safety Labels” on page 4
3. “Unauthorized Modifications” on page 4
4. “Work Site Precautions” on page 5
5. “Operation” on page 6
6. “Equipment” on page 11
7. “Maintenance” on page 14
8. “Shipping and Transportation” on page 17
LEARN SIGNAL WORDS USED WITH SAFETY ALERT SYMBOL
The words “CAUTION,” “WARNING,” and “DANGER” used throughout this manual and on decals on the machine indicate degree of risk of hazards or unsafe practices. All three degrees of risk indicate that safety is involved. Observe precautions indicated whenever you see the Safety Alert “Triangle,” no matter which signal word appears next to the “Exclamation Point” symbol
LOCATION OF SAFETY LABELS
Location of safety labels (decals) can vary from unit to unit. Refer to appropriate Operation and Maintenance Manual, and parts manual for your unit. Always replace damaged or faded decals
GENERAL SAFETY ESSENTIALS ACCESSORY APPLICATIONS
The dozer has been primarily designed for moving earth with a blade. Do not use the machine for activities for which it was not intended
UNAUTHORIZED MODIFICATIONS
Any modification made without authorization or written approval from DOOSAN can create a safety hazard, for which the machine owner must be held responsible. For safety’s sake, replace all OEM parts with the correct authorized or genuine DOOSAN part. For example, not taking the time to replace fasteners, bolts or nuts with the correct replacement parts could lead to a condition in which the safety of critical assemblies is dangerously compromised.
WORK SITE PRECAUTIONS
ATTACHMENT PRECAUTIONS
Options kits are available through your dealer. Because DOOSAN cannot anticipate, identify or test all of the attachments that owners may wish to install on their machines, please contact DOOSAN for authorization and approval of attachments, and their compatibility with options kits
BEFORE STARTING TO DIG, CONTACT AUTHORITIES
Below ground hazards also include natural gas lines, water mains, tunnels and buried foundations. Know what’s underneath the work site before starting to dig.
BE AWARE OF HEIGHT OBSTACLES
Any type of object in the vicinity of the unit that could represent a potential hazard, or cause the operator to react suddenly and cause an accident. Use a spotter or signal person working near bridges, phone lines, work site scaffolds, or other obstructions.
USE CARE ON LOOSE SUPPORT
Working heavy loads over loose, soft ground or uneven, broken terrain can cause dangerous side load conditions and possible tipover and injury. Travel without a load may also be hazardous. If temperatures are changing, be cautious of dark and wet patches when working or traveling over frozen ground. Stay away from ditches, overhangs and all other weak support surfaces.
OVERHANGS ARE DANGEROUS
Digging the work face under an overhang – the work area beneath a cliff or under the edge of a ditch – is dangerous. Know the height and limits of the DOZER and plan ahead while working. Working around deep pits or along high walls may require support blocks, especially after heavy rainfalls or during spring thaws. Park the DOZER away from overhangs before work shut down
SLOPING TERRAIN REQUIRES CAUTION
Dig evenly around the work site whenever possible, trying to gradually level any existing slope. If it’s not possible to level the area or avoid working on a slope, reducing the size the workload is recommended. On sloping surfaces, use caution when positioning the DOZER before starting work. Stay alert for unstable situations to avoid getting into them.
STAY ALERT FOR PEOPLE MOVING THROUGH THE WORK AREA
Slow down work and use slower travel speeds in congested or populated areas. Use a commonly understood signal so that other members of the work crew can warn the operator to slow or halt work in an impending hazard situation
BE AWARE OF AND CONFORM TO LOCAL REGULATIONS
Minimum levels of insurance coverage, work permits or certification, physical barriers around the work site or restricted hours of operation may be mandated by governing authorities. There may also be guidelines, standards or restrictions on equipment that may be used to perform certain kinds of work. Check and follow all local requirements, which may also be related to below ground hazards and power lines.
TABLE OF CONTENTS:
Daewoo Doosan DD80 & DD80L Shop Manual 5023-7070E – PDF DOWNLOAD
Publication Request for Proposed Revision............................................... 7 Dozer Safety S0104000............................................................... 9 To the Operator of a DOOSAN Daewoo Dozer........................................ 11 Learn Signal Words Used With Safety Alert Symbol............................ 11 Location of Safety Labels....................................................... 12 General Safety Essentials....................................................... 12 Accessory Applications...................................................... 12 Unauthorized Modifications...................................................... 12 Work Site Precautions........................................................... 13 Attachment Precautions...................................................... 13 Before Starting to Dig, Contact Authorities................................. 13 Be Aware of Height Obstacles................................................ 13 Use Care on Loose Support................................................... 13 Overhangs Are Dangerous..................................................... 13 Sloping Terrain Requires Caution............................................ 13 Stay Alert for People Moving through the Work Area.......................... 14 Be Aware of and Conform to Local Regulations................................ 14 Operation....................................................................... 14 Operate While Seated at the Operator's Station ONLY......................... 14 Before Starting the Engine.................................................. 15 Never Use Ether Starting Aids............................................... 15 Mounting and Dismounting.................................................... 15 Observe General Safety Rules................................................ 16 Engine Ventilation.......................................................... 16 Asbestos Dust Hazard Prevention............................................. 16 Take Time to Provide Good Visibility........................................ 17 Fuel, Oil and Hydraulic Fluid Fire Hazards.................................. 17 Boost Starting or Charging Engine Batteries................................. 17 Keep "Pinch Point" Areas Clear - Use Caution in Reverse..................... 18 Travel Precautions.......................................................... 18 Operate Carefully on Snow and Ice and in Very Cold Temperatures............. 18 Parking Machine............................................................. 18 Equipment....................................................................... 19 Rough Operation May Require Use of Certified Safety Equipment............... 19 Install Additional Safety Equipment If Conditions Require................... 19 Backup Alarm................................................................ 19 Seat Belts Must Be Used at All Times........................................ 20 Keep a Fire Extinguisher at Hand............................................ 20 Maintain Standard Safety Equipment in Good Condition........................ 20 Winch Operation............................................................. 20 Safety Critical Parts Must Be Replaced Periodically......................... 20 Hydraulic Cylinder Seals Require Periodic Replacement....................... 21 High-pressure Hydraulic Lines Can Store a Great Deal of Energy.............. 21 The Operator's Cabin Deck Must Be Kept Clean................................ 21 Clothing and Personal Protective Items...................................... 21 Breathing Masks, Ear Protection May Be Required............................. 21 Battery Electrolyte and Explosive Gases Can Be Lethal....................... 22 Disconnect Batteries for Electrical Service Before Electrical Welding....... 22 Use Low Heat Portable Lighting.............................................. 22 Maintenance..................................................................... 22 Use Warning Tag Control Lockout Procedures During Service................... 22 Do not Run the Engine If Repairs or Work Is Being Performed Alone........... 22 Always Use Adequate Equipment Supports and Blocking......................... 23 Do not Work on Hot Engines or Hot Cooling or Hydraulic Systems.............. 23 Cool Down Is Required Before Radiator or Reservoir Checks................... 23 Precautions with High-pressure Line, Tubes and Hoses........................ 24 Obtain immediate medical attention if pressurized oil pierces the skin...... 24 Use Correct Replacement Fasteners Tightened to Proper Torque................ 25 Dispose of All Petroleum Based Oils and Fluids Properly..................... 25 Track Tension Adjustments Require Caution................................... 25 Shipping and Transportation..................................................... 25 Obey State and Local Over-the-Road Regulations.............................. 25 Loading and Unloading........................................................... 26 Lifting with Sling.............................................................. 27 Specifications.......................................................................... 29 Specifications for DD80L S0204010................................................... 31 General Specifications.......................................................... 33 Component Locations............................................................. 36 Overall Dimensions.............................................................. 37 Engine Specifications........................................................... 38 Engine Performance curves....................................................... 40 General Maintenance..................................................................... 41 General Maintenance Procedures S0302000............................................. 43 Welding Precautions and Guidelines.............................................. 45 Hydraulic System General Precautions.......................................... 46 Maintenance Service and Repair Procedure........................................ 47 General Precautions......................................................... 47 Hydraulic System Cleanliness and Oil Leaks...................................... 48 Maintenance Precautions for Hydraulic System Service........................ 48 Oil Leakage Precautions..................................................... 48 Cleaning and Inspection......................................................... 49 General Guidelines.......................................................... 49 Bearing inspection.......................................................... 50 Normal Bearing.......................................................... 51 Bent Cage............................................................... 51 Galling................................................................. 51 Abrasive Step Wear...................................................... 52 Etching................................................................. 52 Misalignment............................................................ 52 Indentations............................................................ 52 Fatigue Spalling........................................................ 53 Brinelling.............................................................. 53 Cage Wear............................................................... 53 Abrasive Roller Wear.................................................... 53 Cracked Inner Race...................................................... 54 Smears.................................................................. 54 Frettage................................................................ 54 Heat Discoloration...................................................... 55 Stain Discoloration..................................................... 55 Standard Torques S0309000........................................................... 57 Torque Values for Standard Metric Fasteners..................................... 59 Torque Values for Standard U.S. Fasteners....................................... 60 Type 8 Phosphate Coated Hardware................................................ 62 Torque Values for Hose Clamps................................................... 63 Torque Values for Split Flanges................................................. 64 Torque Wrench Extension Tools................................................... 65 Torque Multiplication....................................................... 65 Other Uses for Torque Wrench Extension Tools................................ 66 Tightening Torque Specifications (Metric)................................... 66 I. "Loctite" Fastener Adhesives......................................... 67 II. "Loctite" Pipe Thread Sealant....................................... 67 III. "Loctite" gasket/flange sealer..................................... 67 IV. "Loctite" retaining compounds....................................... 68 V. "Loctite" Adhesives.................................................. 68 Upper Structure......................................................................... 69 Cabin / Canopy S0402010............................................................. 71 Removal......................................................................... 73 Canopy Removal.............................................................. 75 Cabin Removal............................................................... 76 Left Side Control Stand Cover Removal................................... 77 Right Side Control Stand Cover Removal.................................. 77 Remove Cover In Front of Cabin Assembly................................. 78 Cabin Base Mounting bolts................................................... 79 Lifting Bracket............................................................. 80 Battery Compartment Box......................................................... 81 Window and Gasket Replacement................................................... 85 Falling Object Protective Structures (FOPS)..................................... 86 Engine Cooling System: Radiator/Oil Cooler S0404010................................. 87 General Description............................................................. 89 Theory of Operation......................................................... 89 Parts List.................................................................. 90 Removal......................................................................... 91 Preparation for Removal of the Radiator / Oil Cooler........................ 91 Radiator Removal............................................................ 93 Oil Cooler Removal.......................................................... 95 Installation.................................................................... 97 Radiator Installation....................................................... 97 Oil Cooler Installation..................................................... 98 Nose Section Installation...................................................100 Start-up Procedures.............................................................102 Radiator....................................................................102 Hydraulic Oil Cooler........................................................102 Fuel Tank S0405010..................................................................103 General Description.............................................................105 Parts List..................................................................106 Specifications..............................................................107 Special Tools and Materials.....................................................107 Special Tools...............................................................107 Removal.........................................................................108 Disassembly.....................................................................111 Fuel Tank Suction Strainer..................................................111 Fuel Float Sending Unit.....................................................112 Installation....................................................................113 Start-up Procedures.............................................................114 Fuel Transfer Pump S0405500.........................................................115 General Description.............................................................117 Theory of Operation.........................................................117 Troubleshooting.................................................................118 Replacement of Rotor and Vane...................................................118 Replacement of Rear Cover.......................................................119 Replacement of Armature.........................................................120 Hydraulic Oil Tank S0406010.........................................................121 General Description.............................................................123 Hydraulic System - General Precautions..........................................124 Maintenance Service and Repair Procedure........................................125 General Precautions.........................................................125 Parts List..................................................................126 Specifications..............................................................127 Special Tools and Materials.....................................................128 Special Tools...............................................................128 Removal.........................................................................129 Disassembly.....................................................................133 Hydraulic Oil Tank Access Cover.............................................133 Full Flow Hydraulic Oil Filter..............................................134 Hydraulic Tank Drain Valve..................................................134 Hydraulic Tank Suction Strainer.............................................134 Hydraulic Tank Level Sight Glass............................................135 Fuel Tank Cap and Strainer..................................................135 Installation....................................................................136 Lower Structure and Chassis.............................................................137 Track Assembly S0505020.............................................................139 General Description.............................................................141 Track Shoes and Links...........................................................142 Parts List..................................................................142 Track Removal...............................................................144 Track Installation..........................................................145 Track Spring and Track Adjusting Cylinder.......................................146 Parts List..................................................................146 Track Spring and Adjusting Cylinder Removal.................................148 Track Spring and Adjusting Cylinder Installation............................149 Front Idler Roller..............................................................150 Parts List..................................................................150 Front Idler Roller Removal..................................................152 Front Idler Roller Installation.............................................152 Front Idler Roller Disassembly..............................................153 Front Idler Roller Reassembly...............................................154 Lower (Track) Roller............................................................156 Parts List..................................................................156 Lower (Track) Roller Removal................................................158 Lower (Track) Roller Installation...........................................159 Lower (Track) Roller Disassembly............................................160 Lower (Track) Roller Reassembly.............................................161 Upper (Carrier) Roller..........................................................163 Parts List..................................................................163 Upper (Carrier) Roller Removal..............................................165 Upper (Carrier) Roller Installation.........................................166 Upper (Carrier) Roller Disassembly..........................................167 Upper (Carrier) Roller Reassembly...........................................168 Track Tension...................................................................170 Cleaning and Inspection (Wear Limits and Tolerances)............................172 Travel Reduction Gearbox S0506020...................................................175 General Description.............................................................177 Theory of Operation.........................................................177 Parts List..................................................................178 Adding Gear Oil.............................................................182 Draining Gear Oil...........................................................182 Gear Oil Replacement Interval...............................................182 Special Tools and Materials.....................................................183 Special Tools...............................................................183 Removal.........................................................................185 To Remove Final Reduction Gear Assembly.....................................185 Disassembly and Reassembly......................................................188 Cleaning and Inspection.........................................................197 Checking the Brakes.........................................................197 Installation....................................................................198 Installation of Travel Motor................................................198 Installation of Reduction Gear..............................................198 Installation of Brakes......................................................198 Engine and Drive Train..................................................................199 Drive Coupling (Main Pump) S0609000.................................................201 Drive Coupling..................................................................203 Special Tools...................................................................204 Kawasaki / Tong Myung Pump Tool.............................................204 Uchida Pump Tool............................................................207 Drive Coupling Installation.....................................................209 Installation Procedure......................................................214 Hydraulics..............................................................................215 Hydraulic System Troubleshooting, Testing and Adjustment S0702020...................217 Hydraulic System - General Notes................................................220 Machine Features............................................................220 Axial Piston Variable Displacement Pumps - Technical Specifications.........221 Circuit Diagram.........................................................221 Design..................................................................221 Type of Mounting........................................................221 Pipe Connections........................................................221 Direction of Rotation...................................................221 CharGe Pump Input Pressure..............................................221 System Pressure Range...................................................221 Case Pressure...........................................................222 Speed Range.............................................................222 System Pressure Range...................................................222 Case Pressure...........................................................222 Hydraulic Fluids........................................................222 Bent Axis Variable Motor - Technical Specifications.........................223 Circuit Diagram.........................................................223 Design..................................................................223 Type of Mounting........................................................223 Pipe Connections........................................................223 Direction of Rotation...................................................223 Flow Direction..........................................................223 Hydraulic Parameters....................................................223 Case Pressure...........................................................223 Fluid Viscosity Limits..................................................224 Speed Range.............................................................224 System Pressure Range...................................................224 Case Pressure...........................................................224 Hydraulic Fluids........................................................224 Loop Flushing...........................................................224 Minimum Displacement Limiter............................................225 Hydraulic Schematic.............................................................226 Operation of Working Components.................................................226 Basic Closed Circuit........................................................226 Case Drain and System Cooling...............................................226 Procedural Troubleshooting Baseline Recommendations.............................227 Initial Checks and Tests to Establish Operating Condition of the Dozer......227 Triage Summary..........................................................227 Component Adjusting - Pump......................................................228 Electric Displacement Control Neutral Adjustment............................228 Multifunction Valve Pressure Adjustment.....................................229 Charge Relief Valve Adjustment..............................................231 Component Adjusting - Motor.....................................................232 Charge Relief Valve Adjustment..............................................232 Minimum Displacement Limiter Adjustment.....................................233 Maximum Displacement Limiter Adjustment.....................................233 HC Control Adjustment.......................................................235 Troubleshooting - Pump..........................................................236 System Operating Hot........................................................236 Motor Operates Normally in One Direction Only...............................236 System Response Is Sluggish.................................................237 System Will Not Respond.....................................................238 Troubleshooting - Motor.........................................................239 System Response is Sluggish.................................................239 Excessive Noise and/or Vibration............................................240 System Overheating..........................................................241 Transmission Operates In One Direction Only.................................242 Low Motor Output Torque.....................................................243 Improper Motor Output Speed.................................................244 Cylinders S0705020..................................................................245 General Description.............................................................247 Theory of Operation.........................................................248 Parts List..................................................................249 Lift Cylinder - Parts List..................................................249 Left and right blade lift cylinders are identical.......................249 Blade Angle Cylinder - Parts List...........................................250 Blade Rotation Cylinder - Parts List........................................251 Disassembly.....................................................................252 Reassembly......................................................................253 Travel Motor S0707320...............................................................255 General Description.............................................................257 Theory of Operation.........................................................257 System Circuit..............................................................260 Loop Flushing...............................................................260 Operation...............................................................261 Motor Displacement Limiters.................................................261 Controls....................................................................262 2-line Hydraulic Proportional Control (HC)..................................262 Main Unit - Parts List......................................................265 End Cap - Parts List........................................................266 HC Control - Parts List.....................................................268 Pump Body - Parts List......................................................270 Component Maintenance...........................................................272 Cleanliness.................................................................272 Reservoir and Fluid Level...................................................272 Changing Fluid and Filter...................................................272 Checking for Leaks..........................................................272 General Guidelines..........................................................274 Replacing Shaft Seal (SAE Flange Type)......................................274 Loop Flushing Shuttle Valve Maintenance.....................................277 Charge Pressure Relief Valve Maintenance....................................279 Minimum Angle Servo Cover Maintenance.......................................280 HC Control Maintenance......................................................281 Bleeder Valve...........................................................281 Servo Pressure Shuttle Valve............................................282 Control Pressure Shuttle Valve..........................................283 Pilot Piston and Control Housing........................................284 Removal.........................................................................289 Removal - Final Reduction Gear and Motor Assembly...........................289 Disassembly.....................................................................292 Main Pump Disassembly.......................................................292 Reassembly......................................................................294 Main Pump - Reassembly......................................................294 Start-up Procedure..............................................................298 Main Pump S0708310..................................................................299 General Description.............................................................302 Structure and Components....................................................302 System Circuit..............................................................303 Parts List..................................................................304 Operation of Main Components....................................................312 Case Drain and System Cooling...............................................312 Charge System and Suction Filter............................................312 System Relief Valve.........................................................314 Control (EDC)...............................................................315 Mounting Pad................................................................315 Oil Filter..................................................................315 Pump Gauge, Valve and Sensor Port Locations.................................316 Pump Circuit Diagram....................................................316 Pump Top View...........................................................316 Pump Bottom View........................................................316 Pump Right View.........................................................317 Pump Left View..........................................................317 Pump Rear View..........................................................317 Component Maintenance...........................................................318 General Information.........................................................318 Shaft Seal Replacement......................................................319 Multifunction Valve Cartridges..............................................322 Charge Relief Valve Maintenance.............................................323 High-pressure Filter Maintenance............................................324 Fluid Maintenance.......................................................325 Electric Displacement Control (EDC) Valve Maintenance.......................326 Pressure Control Pilot (PCP) Valve Maintenance..............................328 Orifice Check Valve Maintenance.............................................329 Removal.........................................................................330 Cabin / Canopy Removal......................................................330 Seat Removal................................................................330 Floor Plate Removal.........................................................330 Hydraulic hoses and pipes removal...........................................332 Pump Assembly Removal.......................................................333 Disassembly.....................................................................334 Charge Pump Disassembly.....................................................334 Main Pump Disassembly.......................................................336 Reassembly......................................................................344 Charge Pump Reassembly......................................................344 Main Pump reassembly........................................................349 Installation....................................................................361 Pump Assembly Installation..................................................361 Hydraulic Hoses and Pipes Installation......................................361 Floor Plate Installation....................................................362 Seat Installation...........................................................363 Cabin / Canopy Installation.................................................363 Initial Start-up Procedure......................................................364 Main Control Valve S0709410.........................................................367 Control Valve Operation.........................................................369 Major Components............................................................369 Direction Change Valve......................................................370 Sectional Body Valve........................................................370 Open Center System..........................................................370 Parallel Circuit............................................................370 Hydraulic Circuit Diagram...................................................371 Parts List......................................................................372 Control Valve...............................................................372 Relief Section Valve........................................................373 Tilt, Angle Section.........................................................374 Spool Positioner............................................................375 Retainer....................................................................376 Float Spool Positioner......................................................377 Rod Check Plug..............................................................378 Overload Relief / Check Valve...............................................379 Main Relief Valve...........................................................380 Restrictor..................................................................381 Discharge Port Cover........................................................382 Removal.........................................................................383 Disassembly and Reassembly......................................................384 Disassembly and Reassembly of Sections......................................384 Replacing Spool Seals.......................................................385 Installation....................................................................386 Hydraulic Schematic (DD80L) S0794000................................................387 General Description.............................................................389 DD80, DD80L.....................................................................390 Electrical System.......................................................................393 Electrical System S0802020..........................................................395 Overview........................................................................398 Electric Wire Color.........................................................398 Alternator..................................................................398 Battery.....................................................................398 Starter Motor...............................................................398 Preheat System..............................................................398 Troubleshooting - Electrical System.............................................399 Micro-controller................................................................400 System Overview.............................................................400 General Specifications......................................................401 Calibration Method..........................................................401 Graphic PC Interface........................................................401 Controller Self Diagnosis and Emergency Operation...........................401 Micro-controller Troubleshooting............................................405 Normal Operation........................................................405 Calibration.............................................................406 Cycle Modes.............................................................407 Rotary Position Sensor (Angle Sensor)...........................................408 Description.................................................................408 General Specifications......................................................408 General Dimensions..........................................................409 Magnetic Pulse Pickup (Rotation Speed Sensor)...................................410 General Description.........................................................410 Engine Magnetic Pulse Pick Up...............................................410 Engine Magnetic Pulse Pickup Mounting Location..........................411 Motor Magnetic Pulse Pick Up................................................411 Mounting Location.......................................................411 Electric Displacement Control Valve (EDC).......................................412 General Specifications......................................................412 Electric Current-pump Swashplate Angle..................................413 Pressure Control Pilot Valve (PCP)..............................................414 General Dimensions..........................................................415 Electric Current-motor Swash Plate Angle....................................415 Calibration Procedure for Micro Controller......................................416 System Concept..............................................................416 Working Range of Rotary Position Sensor.....................................417 Throttle Lever Sensor...................................................418 Travel (FNR) Lever Sensor...............................................419 Left and Right Steering Pedal Sensors...................................420 Brake Pedal Sensor......................................................421 Calibration Procedure.......................................................421 General Notes...........................................................421 Procedure...............................................................422 Calibration Point and Sensor Voltage....................................423 Engine Start System.............................................................425 Starter Control General Description.........................................425 When the Starter Switch is Turned to the Start Position.....................426 Immediately After the Engine is Started.....................................427 Engine Preheat System...........................................................428 When the Coolant Temperature is Below 10°C (Thermo Switch is Turned Off)....428 When the Coolant Temperature is Above 10°C (Thermo Switch is Turned On).....429 Engine Stop System..............................................................430 Engine Stop Motor...........................................................430 Engine Starter..............................................................431 Engine Stop.................................................................432 Charging System.................................................................433 Alternator Structure........................................................433 Charging Circuit............................................................434 Electrical Schematic (DD80L) S0894000...............................................435 General Description.............................................................437 DD80, DD80L - Canopy model......................................................438 DD80, DD80L - Cabin model.......................................................440 Attachments.............................................................................443 Dozer Leveling Blade S0905000.......................................................445 Parts List......................................................................448 Front Attachment Pin Specifications.............................................450 Front Attachment - Removal and Installation.....................................451 Blade Removal Procedure.....................................................451
DAEWOO DOOSAN DD80 & DD80L SHOP MANUAL 5023-7070E – PDF DOWNLOAD:
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