Hyundai R450LC-7 Crawler Excavator Service Repair Factory Manual INSTANT
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SECTION 1 GENERAL
Group 1 Safety Hints ---------------------------------------------------------------------------------------------------- 1-1
Group 2 Specifications ------------------------------------------------------------------------------------------------- 1-9
FOLLOW SAFE PROCEDURE
Unsafe work practices are dangerous.
Understand service procedure before doing
work; Do not attempt shortcuts.
WEAR PROTECTIVE CLOTHING
Wear close fitting clothing and safety equipment
appropriate to the job.
WARN OTHERS OF SERVICE WORK
Unexpected machine movement can cause
serious injury.
Before performing any work on the excavator,
attach a 「Do Not Operate」 tag on the right side
control lever.
USE HANDHOLDS AND STEPS
Falling is one of the major causes of personal
injury.
When you get on and off the machine, always
maintain a three point contact with the steps and
handrails and face the machine. Do not use any
controls as handholds.
Never jump on or off the machine. Never mount
or dismount a moving machine.
Be careful of slippery conditions on platforms,
steps, and handrails when leaving the machine.
SECTION 1 GENERAL
GROUP 1 SAFETY
1-1
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PREPARE FOR EMERGENCIES
Be prepared if a fire starts.
Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for doctors,
ambulance service, hospital, and fire
department near your telephone.
PROTECT AGAINST FLYING DEBRIS
Guard against injury from flying pieces of metal
or debris; Wear goggles or safety glasses.
PROTECT AGAINST NOISE
Prolonged exposure to loud noise can cause
impairment or loss of hearing.
Wear a suitable hearing protective device such
as earmuffs or earplugs to protect against
objectionable or uncomfortable loud noises.
AVOID POWER LINES
Serious injury or death can result from contact
with electric lines.
Never move any part of the machine or load
closer to electric line than 3m(10ft) plus twice the
line insulator length.
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KEEP RIDERS OFF EXCAVATOR
Only allow the operator on the excavator. Keep
riders off.
Riders on excavator are subject to injury such
as being struck by foreign objects and being
thrown off the excavator. Riders also obstruct
the operator's view resulting in the excavator
being operated in an unsafe manner.
MOVE AND OPERATE MACHINE SAFELY
Bystanders can be run over. Know the location
of bystanders before moving, swinging, or
operating the machine.
Always keep the travel alarm in working
condition. It warns people when the excavator
starts to move.
Use a signal person when moving, swinging, or
operating the machine in congested areas.
Coordinate hand signals before starting the
excavator.
OPERATE ONLY FORM OPERATOR'S SEAT
Avoid possible injury machine damage. Do not
start engine by shorting across starter terminals.
NEVER start engine while standing on ground.
Start engine only from operator's seat.
PARK MACHINE SAFELY
Before working on the machine:
·Park machine on a level surface.
·Lower bucket to the ground.
·Turn auto idle switch off.
·Run engine at 1/2 speed without load for 2 minutes.
·Turn key switch to OFF to stop engine.
Remove key from switch.
·Move pilot control shutoff lever to locked position.
·Allow engine to cool.
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SUPPORT MACHINE PROPERLY
Always lower the attachment or implement to
the ground before you work on the machine. If
you must work on a lifted machine or
attachment, securely support the machine or
attachment.
Do not support the machine on cinder blocks,
hollow tiles, or props that may crumble under
continuous load.
Do not work under a machine that is supported
solely by a jack. Follow recommended
procedures in this manual.
SERVICE COOLING SYSTEM SAFELY
Explosive release of fluids from pressurized
cooling system can cause serious burns.
Shut off engine. Only remove filler cap when
cool enough to touch with bare hands.
HANDLE FLUIDS SAFELY-AVOID FIRES
Handle fuel with care; It is highly flammable.
Do not refuel the machine while smoking or
when near open flame or sparks. Always stop
engine before refueling machine.
Fill fuel tank outdoors.
Store flammable fluids away from fire hazards.
Do not incinerate or puncture pressurized
containers.
Make sure machine is clean of trash, grease,
and debris.
Do not store oily rags; They can ignite and burn
spontaneously.
1-4
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Hyundai R450LC-7 Crawler Excavator Service Repair Factory Manual is an electronic manual that provides comprehensive information for the maintenance and repair of your Hyundai R450LC-7 Crawler Excavator. It offers the advantage of zooming in anywhere on your computer for clear viewing, making it very user-friendly. This manual covers various sections including:
- SECTION 1 - GENERAL
- Group 1 Safety Hints
- Group 2 Specifications
- SECTION 2 - STRUCTURE AND FUNCTION
- Group 1 Pump Device
- Group 2 Main Control Valve
- Group 3 Swing Device
- Group 4 Travel Device
- Group 5 RCV Lever
- Group 6 RCV Pedal
- SECTION 3 - HYDRAULIC SYSTEM
- Group 1 Hydraulic Circuit
- Group 2 Main Circuit
- Group 3 Pilot Circuit
- Group 4 Single Operation
- Group 5 Combined Operation
- SECTION 4 - ELECTRICAL SYSTEM
- Group 1 Component Location
- Group 2 Electrical Circuit
- Group 3 Electrical Component Specification
- Group 4 Connectors
- SECTION 5 - MECHATRONICS SYSTEM
- Group 1 Outline
- Group 2 Mode selection System
- Group 3 Automatic Deceleration System
- Group 4 Power Boost System
- Group 5 Travel Speed Control System
- Group 6 Automatic Warming Up Function
- Group 7 Engine Overheat Prevention Function
- Group 8 Anti-Restart System
- Group 9 Self-Diagnostic System
- Group 10 Engine Control System
- Group 11 EPPR(Electro Proportional Pressure Reducing) Valve
- Group 12 Monitoring system
- SECTION 6 - TROUBLESHOOTING
- Group 1 Before troubleshooting
- Group 2 Hydraulic and Mechanical System
- Group 3 Electrical System
- Group 4 Mechatronics System
- SECTION 7 - MAINTENANCE STANDARD
- Group 1 Operational Performance Test
- Group 2 Major Components
- Group 3 Track and Work Equipment
- SECTION 8 - DISASSEMBLY AND ASSEMBLY
- Group 1 Precaution
- Group 2 Tightening Torque
- Group 3 Pump Device
- Group 4 Main Control Valve
- Group 5 Swing Device
- Group 6 Travel Device
- Group 7 RCV Lever
- Group 8 Turning Joint
- Group 9 Boom, Arm and Bucket Cylinder
- Group 10 Undercarriage
- Group 11 Work Equipment
- SECTION 9 - COMPONENT MOUNTING TORQUE
- Group 1 Introduction guide
- Group 2 Engine system
- Group 3 Electric system
- Group 4 Hydraulic system
- Group 5 Undercarriage
- Group 6 Structure
- Group 7 Work equipment
This manual is written in a detailed step-by-step format, making it easy for both professional mechanics and DIY enthusiasts to use for repairs, potentially saving on expenses. The file format is compatible with all versions of Windows & Mac, and it is available in English. Adobe Reader & Win are required for viewing.
