Doosan Solar 70-III Shop Manual 2023-7092E – PDF DOWNLOAD
DESCRIPTION:
Doosan Solar 70-III Shop Manual 2023-7092E – PDF DOWNLOAD
Accessory Applications:
- The excavator has been primarily designed for moving earth with a bucket.
- For use as a grapple or for other object handling, contact Daewoo.
- Lifting work applications (unless restricted or prohibited by local regulations) are permitted in approved lift configuration , to rated capacity only, with no sideloading. DO NOT use the machine for activities for which it was not intended.
- DO NOT use the bucket for lifting work, unless lift slings are used in the approved configuration.
- Use of an accessory hydraulic hammer (breaker), work in rough terrain, demolition applications or other hazardous operation may require installation of additional protective structures to safeguard the operator.
- Refer to Section 3 for additional information on Falling Object Protective Structures (F.O.P.S.) and other reinforcement systems.
Lifting Capacity Rating Configuration:
- Lifting capacity ratings that are printed at the end of this safety section are based on the machine being level, on a firm supporting surface, with hooks and slings attached in approved configuration. Loads must be balanced and supported evenly.
- Use taglines to keep the load steady if wind conditions and large surface area are a problem.
- Work crew hand signals, individual tasks and safe procedures should all be universally understood before the lift is made.
Locations of Safety Labels:
- Always keep these labels clean.
- If they are lost or damaged, replace them with a new label. It is the responsibility of the equipment owner and crew to provide essential safety information in the immediate vicinity of hazards.
- Safety labels may be available in languages other than English, or labels providing a warning for hazards other than those that follow may be available.
- Contact your Daewoo distributor to find out what labels are available.
TABLE OF CONTENTS:
Doosan Solar 70-III Shop Manual 2023-7092E – PDF DOWNLOAD
SAFETY
To the Operator of a Daewoo Excavator ……………………………………… 1-1
General Safety Essentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Locations of Safety Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Work-site Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Equipment …………………………………………………………. 1-10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Shipping and Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Excavator Lift Capacity Tables ……………………………………………. 1-13
SPECIFICATIONS
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Excavator Engine Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Engine Performance Curves ……………………………………………… 2-4
Hydraulic System Component Specifications ………………………………….. 2-5
Hydraulic Pump Performance Characteristics ………………………………….. 2-6
System Component Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
General Dimensions …………………………………………………… 2-9
Working Range Dimensions ……………………………………………… 2-10
Reference Table – Approximate Weight of Workload Materials ………………………. 2-11
Excavator Lift Capacity Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Excavator Performance Tests and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Excavator Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
UPPER STRUCTURE
Operator’s Cab Removal Procedure ………………………………………… 3-1
Falling Object Protective Structures (F.O.P.S.) ………………………………….. 3-3
Front Attachment Pin Specifications ………………………………………… 3-4
Bucket Tooth Inspection and Replacement ……………………………………. 3-5
Shimming Bucket Linkage ………………………………………………. 3-6
Bucket Attachment, Removal and Reversal …………………………………… 3-7
Removal and Installation of the Front Attachment ……………………………….. 3-8
Engine Components …………………………………………………… 3-11
Hydraulic System Description …………………………………………….. 3-12
Hydraulic System Schematic …………………………………………….. 3-13
Hydraulic Circuits …………………………………………………….. 3-14
Hydraulic System General Precautions ………………………………………. 3-19
Maintenance Service and Repair Procedures ………………………………….. 3-20
Welding Precautions and Guidelines ……………………………………….. 3-21
Accumulator ………………………………………………………… 3-22
Hydraulic Cylinder Operation …………………………………………….. 3-24
Hydraulic Attachment Cylinder Components …………………………………… 3-25
Hydraulic Attachment Cylinder Disassembly and Reassembly ………………………. 3-26
Swing Bearing Maintenance ……………………………………………… 3-33
Swing Bearing Rebuild …………………………………………………. 3-34
70-111 Shop Manual TABLE OF C ONT ENTS
Main Pump Operation . .. . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . …. . 3-36
Main Pump Disassembly . . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . .. .. . 3-40
Main Pump Reassembly . . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . .. .. . 3-45
Pilot Pump Disassembly and Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-52
Swing Motor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54
Control Valve Section Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-56
Control Valve T heory of Operation . .. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . 3-61
Main Control Valve Disassembly .. . . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . 3-74
Main Control Valve Reassembly .. . .. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . 3-82
Main Relief Valve . . . . . .. . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . … . … . 3-90
Overload Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-91
Relief Valve Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93
Remote Control Valve Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-94
Remote Control Valve Disassembly and Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-96
Hydraulic System Schematic . . .. . .. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . 3-106
LOWER STRUCTURE
General Description . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. . .. . .. . . … . 4-1
Travel Motor Assembly and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Travel Motor Major Components and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Axial Piston Motor Major Components and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Travel Motor T heory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Idler Assembly and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 o
Lower Roller Assembly and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Upper Roller Assembly and Parts List . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . 4-12
Track Spring and Adjusting Cylinder Assembly and Parts List . . . . . . . .. . .. . .. . .. . .. . .. . .. . . 4-13
Track Tensioning . . . . . .. . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . … . … . 4-14
Service Standards for Lower Travel Frame Components . . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . . 4-15
ELECTRICAL SYSTEM
24 Volt Operation . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. . .. . … . … .
Engine Starting Circuit . .. . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . . … .
Engine Start-up and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Preheat – Preheat Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternator Circuit . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . . . . .. . … .
Low Current Electrical Circuits . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . .. .. .
Windshield Wiper Delay Circuitry . . .. . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. .
Wiring Color Code for Electrical Schematic Diagrams .. . .. . .. . .. . … … . .. . .. . .. . .. . .. . .
Climate Control (Air Conditioning) Circuit . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .
Instrument Panel . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. . .. . … . … .
Function Check
ENGINE
Engine Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Wear Limits of Major Engine Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Engine Lubrication . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. . .. . … . … . 6-1 O
Cylinder Head Bolt Torque Requirements . . . . . . .. . .. . .. . .. . .. . .. . .. . … … … … … . . 6-14
INSPECTION, MAINTENANCE AND ADJUSTMENT
Periodic Inspection and Maintenance . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . 7-1
Table of Recommended Lubricants . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . 7-2
Maintenance Intervals . .. . .. . .. . .. . .. . .. . … … … … … … … . .. . .. . .. . .. . . … . 7-3
ii TABLE OF CONT ENTS 70-111 Shop Manual
Inspection and Maintenance ……………………………………………… 7-4
Daily or Every 1 O Operating Hours …………………………………………. 7-4
Weekly or Every 50 Operating Hours ……………………………………….. 7-11
150 Operating Hours ………………………………………………….. 7-13
Monthly or Every 250 Operating Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15
T hree Months or Every 500 Operating Hours . . … … . .. . .. . .. . … … … … … … … .. 7-16
Six Months or Every 1,000 Operating Hours …………………………………… 7-17
Annually or Every 1,200 Operating Hours …………………………………….. 7-20
Horsepower Adjustment ………………………………………………… 7-22
Hydraulic Pump Maintenance …………………………………………….. 7-22
Torque Specifications ………………………………………………….. 7-24
Torque Wrench Extension Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
Flange and T hread Sealant Assembly Compounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27
Welding Precautions and Guidelines ……………………………………….. 7-29
Hydraulic System Cleanliness and Oil Leaks ………………………………….. 7-30
TROUBLESHOOTING
Engine ……………………………………………………………. 8-1
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Hydraulic System …………………………………………………….. 8-4
Hydraulic Pump ……………………………………………………… 8-5
Hydraulic Cylinders …………………………………………………… 8-7
Swing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Travel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Travel Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 O
Counterbalance Valve …………………………………………………. 8-10
Relief Valve ………………………………………………………… 8-11
2 Speed Transmission …………………………………………………. 8-11
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
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