Complete workshop & service manual with electrical wiring diagrams for Hyundai Construction Wheeled Excavator HW140. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Hyundai Construction Wheeled Excavator HW140 service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

EXCERPT:
CONTENTS
SECTION 1 GENERAL
Group 1 Safety Hints - - - - - 1-1
Group 2 Specifications - - - - - 1-9
SECTION 2 STRUCTURE AND FUNCTION
Group 1 Pump Device - - - - - - 2-1
Group 2 Main Control Valve - - - - - - 2-20
Group 3 Swing Device - - - - - - 2-47
Group 4 Travel Motor - - - - - 2-58
Group 5 RCV Lever - - - - 2-64
Group 6 Accelerator Pedal - - - - - 2-71
Group 7 Brake Pedal (Valve) - - - - 2-72
Group 8 Transmission - - - - - - 2-74
Group 9 Travel Control Valve - - - - 2-81
Group 10 Steering Valve - - - - 2-83
Group 11 Front Axle and Rear Axle - - - - - 2-85
SECTION 3 HYDRAULIC SYSTEM
Group 1 Hydraulic Circuit - - - - 3-1
Group 2 Main Circuit - - - - - - 3-3
Group 3 Pilot Circuit - - - - 3-6
Group 4 Single Operation - - - - - - 3-17
Group 5 Combined Operation - - - - - 3-32
SECTION 4 ELECTRICAL SYSTEM
Group 1 Component Location - - - - - 4-1
Group 2 Electrical Circuit - - - - 4-3
Group 3 Electrical Component Specification - - - - - 4-25
Group 4 Connectors - - - - - - 4-37
SECTION 5 MECHATRONICS SYSTEM
Group 1 Outline - - - - - - 5-1
Group 2 Mode selection System - - - - 5-3
Group 3 Automatic Deceleration System - - - - - - 5-6
Group 4 Power Boost System - - - - - 5-7
Group 5 Travel Speed Control System - - - - 5-8
Group 6 Automatic Warming Up Function - - - - 5-9
Group 7 Engine Overheat Prevention Function - - - - - 5-10
Group 8 Variable Power Control System - - - - - - 5-11
Group 9 Attachment Flow Control System - - - - - - 5-12
Group 10 Boom Floating Control System - - - - 5-13
Group 11 Intelligent Power Control System - - - - 5-14
Group 12 Anti-Restart System - - - - 5-16
Group 13 Self-Diagnostic System - - - - 5-17
Group 14 Engine Control System - - - - - 5-54
Group 15 EPPR Valve - - - - - 5-55
Group 16 Monitoring System - - - - - - 5-60
Group 17 Fuel Warmer System - - - - - 5-100
SECTION 6 TROUBLESHOOTING
Group 1 Before Troubleshooting - - - - - 6-1
Group 2 Hydraulic and Mechanical System - - - - 6-4
Group 3 Electrical System - - - - - - 6-25
Group 4 Mechatronics System - - - - 6-41
SECTION 7 MAINTENANCE STANDARD
Group 1 Operational Performance Test - - - - - - 7-1
Group 2 Major Components - - - - - - 7-19
Group 3 Track and Work Equipment - - - - - 7-28
SECTION 8 DISASSEMBLY AND ASSEMBLY
Group 1 Precaution - - - - - 8-1
Group 2 Tightening Torque - - - - - 8-4
Group 3 Pump Device - - - - - - 8-7
Group 4 Main Control Valve - - - - - - 8-30
Group 5 Swing Device - - - - - - 8-44
Group 6 Travel Motor - - - - - - 8-77
Group 7 Transmission - - - - 8-101
Group 8 Steering Valve - - - - - 8-155
Group 9 Front Axle - - - - - 8-180
Group 10 Rear Axle - - - - - - 8-251
Group 11 RCV Lever - - - - 8-293
Group 12 Turning Joint - - - - - 8-307
Group 13 Boom, Arm, Bucket, Dozer and Outrigger Cylinders - - - - - 8-313
Group 14 Work Equipment - - - - 8-335
SECTION 9 COMPONENT MOUNTING TORQUE
Group 1 Introduction Guide - - - - 9-1
Group 2 Engine System - - - - - - 9-2
Group 3 Electric System - - - - - 9-4
Group 4 Hydraulic System - - - - - 9-6
Group 5 Power train System - - - - - 9-9
Group 6 Structure - - - - - 9-11
Group 7 Work Equipment - - - - 9-15
Group 3 Automatic Deceleration System - - - - - - 5-6
Group 4 Power Boost System - - - - - 5-7
Group 5 Travel Speed Control System - - - - 5-8
Group 6 Automatic Warming Up Function - - - - 5-9
Group 7 Engine Overheat Prevention Function - - - - - 5-10
Group 8 Variable Power Control System - - - - - - 5-11
Group 9 Attachment Flow Control System - - - - - - 5-12
Group 10 Boom Floating Control System - - - - 5-13
Group 11 Intelligent Power Control System - - - - 5-14
Group 12 Anti-Restart System - - - - 5-16
Group 13 Self-Diagnostic System - - - - 5-17
Group 14 Engine Control System - - - - - 5-54
Group 15 EPPR Valve - - - - - 5-55
Group 16 Monitoring System - - - - - - 5-60
Group 17 Fuel Warmer System - - - - - 5-100
SECTION 6 TROUBLESHOOTING
Group 1 Before Troubleshooting - - - - - 6-1
Group 2 Hydraulic and Mechanical System - - - - 6-4
Group 3 Electrical System - - - - - - 6-25
Group 4 Mechatronics System - - - - 6-41
SECTION 7 MAINTENANCE STANDARD
Group 1 Operational Performance Test - - - - - - 7-1
Group 2 Major Components - - - - - - 7-19
Group 3 Track and Work Equipment - - - - - 7-28
SECTION 8 DISASSEMBLY AND ASSEMBLY
Group 1 Precaution - - - - - 8-1
Group 2 Tightening Torque - - - - - 8-4
Group 3 Pump Device - - - - - - 8-7
Group 4 Main Control Valve - - - - - - 8-30
Group 5 Swing Device - - - - - - 8-44
Group 6 Travel Motor - - - - - - 8-77
Group 7 Transmission - - - - 8-101
Group 8 Steering Valve - - - - - 8-155
Group 9 Front Axle - - - - - 8-180
Group 10 Rear Axle - - - - - - 8-251
Group 11 RCV Lever - - - - 8-293
Group 12 Turning Joint - - - - - 8-307
Group 13 Boom, Arm, Bucket, Dozer and Outrigger Cylinders - - - - - 8-313
Group 14 Work Equipment - - - - 8-335
SECTION 9 COMPONENT MOUNTING TORQUE
Group 1 Introduction Guide - - - - 9-1
Group 2 Engine System - - - - - - 9-2
Group 3 Electric System - - - - - 9-4
Group 4 Hydraulic System - - - - - 9-6
Group 5 Power train System - - - - - 9-9
Group 6 Structure - - - - - 9-11
Group 7 Work Equipment - - - - 9-15
…
GROUP 4 MAIN CONTROL VALVE
1. REMOVAL AND INSTALL OF MOTOR
(1)REMOVAL
Lower the work equipment to the ground and stop the engine.
Operate the control levers and pedals several times to release the remaining pressure in the hydraulic piping.
Loosen the breather slowly to release the pressure inside the hydraulic tank.
Escaping fluid under pressure can penetrate the skin causing serious injury.
When pipes and hoses are disconnected, the oil inside the piping will flow out, so catch it in oil pan.
Remove the wirings for the pressure sensor and so on.
Remove bolts and disconnect pipe.
Disconnect pilot line hoses.
Disconnect pilot piping.
Sling the control valve assembly and remove the control valve mounting bolt and bracket.
·Weight : 80 kg (175 lb)
Remove the control valve assembly.
When removing the control valve assembly, check that all the piping have been disconnected.
INSTALL
Carry out installation in the reverse order to removal.
Bleed the air from below items.
Cylinder (Boom, arm, bucket)
Swing motor
Travel motor
See each item removal and install.
Confirm the hydraulic oil level and recheck the hydraulic oil leak or not.
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