Complete workshop & service manual with electrical wiring diagrams for Hyundai Construction Wheel Loader HL720-3. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This Hyundai Construction Wheel Loader HL720-3 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:
WHEEL LOADER [HL720-3]
FOREWORD
SECTION 1
GENERAL
Group 1 Safety Hints
Group 2 Specifications
Group 3 Operation Checkout Record Sheet
SECTION 2
ENGINE
Group 1 Structure and Function
SECTION 3
POWER TRAIN SYSTEM
Group 1 Structure and Function
Group 2 Operational Checks and Troubleshooting
Group 3 Test and Adjustments
Group 4 Disassembly and Assembly
SECTION 4
BRAKE SYSTEM
Group 1 Structure and Function
Group 2 Operational Checks and Troubleshooting
Group 3 Test and Adjustments
Group 4 Disassembly and Assembly
SECTION 5
STEERING SYSTEM
Group 1 Structure and Function
Group 2 Operational Checks and Troubleshooting
Group 3 Test and Adjustments
Group 4 Disassembly and Assembly
SECTION 6
WORK EQUIPMENT
Group 1 Structure and Function
Group 2 Operational Checks and Troubleshooting
Group 3 Test and Adjustments
Group 4 Disassembly and Assembly
SECTION 7
ELECTRICAL SYSTEM
Group 1 Component Location
Group 2 Electrical Circuit
Group 3 Monitoring System
Group 4 Electrical Component Specification
Group 5 Connectors
Group 6 Troubleshooting
…
6-1
1. HYDRAULIC SYSTEM OUTLINE
The loader hydraulic system is a pilot operated, open center system which is supplied with flow from the fixed displacement main hydraulic pump.
The pilot control system is a low pressure, closed center hydraulic system which is supplied with flow from the first(Steering) pump.
The loader system components are:
Main pump
Main control valve
Bucket cylinder
Boom cylinders
Pilot supply unit
Remote control valve(Pilot control valve)
Safety valve
The pilot supply unit consists of the pressure reducing valve, relief valve and accumulator.
Flow from the main hydraulic pump not used by the steering system leaves the priority valve EF port.
It flows to the inlet port plate of four blocks type main control valve.
The main control valve is a tandem version spool type, open center valve which routes flow to the boom, bucket or auxiliary cylinders(Not shown) when the respective spools are shifted.
Flow from the steering pump(The first pump) is routed to the pilot supply unit where the steering pump outlet pressure is reduced to pilot circuit pressure. The pilot supply unit flow to the remote control valve.
The remote control valve routed flow to either end of each spool valve section in the main control valve to control spool stroke.
A accumulator mounted on pilot supply unit supplies a secondary pressure source to operated remote control valve so the boom can be lowered if the engine is off.
The return circuit for the main hydraulic system have return filter inside the hydraulic tank. The return filter uses a filter element and a bypass valve. The bypass valve is located in the upside of filter.
SECTION 6 WORK EQUIPMENT
GROUP 1 STRUCTURE AND FUNCTION
…