Komatsu PC340LC-7K, PC340NLC-7K Hydraulic Excavator Shop Manual (K40001 and up) – UEBM001501

This Complete Service Repair Workshop Manual PDF Download for the Komatsu PC340LC-7K, PC340NLC-7K Hydraulic Excavator (SN: K40001 and up) has easy to read text sections with top quality diagrams, pictures and illustrations. The step by step instructions show you how to fault find or complete any repair or overhaul, correctly and efficiently, saving time and avoiding costly mistakes. All specifications and tolerances are listed. Functions of components and systems are also explained.

APPLICABLE MODELS :

Komatsu PC340LC-7K – S/N: K40001 and up
Komatsu PC340NLC-7K – S/N: K40001 and up

PC340LC/NLC-7K mount the SAA6D114E engine

TABLE OF CONTENTS :

– GENERAL
– STRUCTURE AND FUNCTION
– MAINTENANCE STANDARD
– TESTING AND ADJUSTING
– DISASSEMBLY AND ASSEMBLY
– OTHERS

MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Product Code : UEBM001501
Total Pages : 630

This manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!!

This manual PDF download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having PDF files instead of a hard-printed manual is that you can use the Search feature in Acrobat to find just what your looking for and just print out the exact pages you need or all manual.

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PC340LC-7 – 40001 AND UP
PC340NLC-7 – 40001 AND UP

01 GENERAL
SPECIFICATION DIMENSION DRAWINGS
DIMENSIONS
WORKING RANGES
DIMENSIONS
Working ranges
SPECIFICATIONS
PC340LC-7, PC340NLC-7
WEIGHT TABLE
PC340LC-7, PC340NLC-7
FUEL, COOLANT, AND LUBRICANTS

10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
ENGINE RELATED PARTS
RADIATOR • OIL COOLER • AFTERCOOLER
POWER TRAIN
FINAL DRIVE
SWING MACHINERY
SWING CIRCLE
TRACK FRAME • RECOIL SPRING
IDLER
CARRIER ROLLER
TRACK ROLLER
TRACK SHOE
TRIPLE GROUSER SHOE
hydraulic equipment layout drawing
HYDRAULIC TANK
HYDRAULIC PUMP
HPV125 + 125
LS VALVE
PC VALVE
LS(pc)-EPC VALVE
variable volume valve
CONTROL VALVE
MAIN RELIEF VALVE
Variable pressure compensation valve
CLSS
OUTLINE OF CLSS
SELF PRESSURE REDUCING VALVE
SWING MOTOR
REVERSE PREVENTION VALVE
CENTER SWIVEL JOINT
TRAVEL MOTOR
TRAVEL JUNCTION VALVE
TRAVEL PPC SHUTTLE VALVE
VALVE CONTROL
WORK EQUIPMENT • SWING PPC VALVE
TRAVEL PPC VALVE
SERVICE PPC VALVE
SOLENOID VALVE
PPC ACCUMULATOR
return oil filter
For Breaker
BOOM HYDRAULIC DRIFT PREVENTION VALVE
quick return valve
LIFT CHECK VALVE
attachment circuit selector valve
HYDRAULIC CYLINDER
BOOM CYLINDER
ARM CYLINDER
BUCKET CYLINDER
work equipment
2. Dimension of bucket
air conditioner
air conditioner piping
ENGINE CONTROL
Governor motor
Engine throttle and pump controller
ELECTRONIC CONTROL SYSTEM
Total system diagram
mULTI MONITOR SYSTEM
SENSOR

20 TESTING AND ADJUSTING
1. The standard value for a new machine given in the table is the value used when shipping the ma…
2. The service limit value given in the tables is the estimated value for the shipped machine bas…
3. These standard values are not the standards used in dealing with claims.
STANDARD VALUE TABLE FOR ENGINE RELATED PARTS
STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS

INSPECTION AND ADJUSTMENT OF ENGINE RPM
MEASUREMENT OF AIR BOOST PRESSURE
MEASUREMENT OF EXHAUST GAS COLOR
ADJUSTMENT OF VALVE CLEARANCE
MEASUREMENT OF COMPRESSION PRESSURE
MEASUREMENT OF BLOW-BY PRESSURE
INSPECTION AND ADJUSTMENT OF FUEL INJECTION TIMING
MEASUREMENT OF ENGINE OIL PRESSURE
ADJUSTMENT OF ENGINE SPEED SENSOR
INSPECTION AND ADJUSTMENT OF AIR COMPRESSOR BELT TENSION
EMERGENT ESCAPE FROM FAILURE IN ENGINE CONTROL SYSTEM
MEASUREMENT OF CLEARANCE IN SWING CIRCLE BEARINGS
INSPECTION AND ADJUSTMENT OF TRACK SHOE TENSION
INSPECTION OF WEAR ON SPROCKET
INSPECTION AND ADJUSTMENT OF HYDRAULIC OIL PRESSURE IN HYDRAULIC CIRCUIT FOR WORK EQUIPMENT, SWIN…
INSPECTION AND ADJUSTMENT OF CONTROL CIRCUIT OIL PRESSURE
INSPECTION AND ADJUSTMENT OF PUMP PC CONTROL CIRCUIT OIL PRESSURE
INSPECTION AND ADJUSTMENT OF PUMP LS CONTROL CIRCUIT OIL PRESSURE
MEASUREMENT OF SOLENOID VALVE OUTPUT PRESSURE
MEASUREMENT OF PPC VALVE OUTPUT PRESSURE
ADJUSTMENT OF WORK EQUIPMENT AND SWING PPC VALVE
INSPECTION OF LOCATIONS OF HYDRAULIC DRIFT OF WORK EQUIPMENT
RELEASE OF REMAINING PRESSURE IN HYDRAULIC CIRCUIT
MEASUREMENT OF OIL LEAKAGE AMOUNT
AIR BLEEDING OF VARIOUS PARTS
INSPECTION PROCEDURES FOR DIODE
SPECIAL FUNCTION OF MULTI-MONITOR PANEL
DISPLAY METHOD AND SPECIAL FUNCTIONS OF 7-SEGMENT MONITOR PANEL
PREPARATIONS FOR TROUBLESHOOTING ELECTRICAL SYSTEM

POINTS TO REMEMBER WHEN TROUBLESHOOTING
SEQUENCE OF EVENTS IN TROUBLESHOOTING
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE
CHECKS BEFORE TROUBLESHOOTING
CLASSIFICATION AND STEPS FOR TROUBLESHOOTING
CONNECTOR LOCATION CHART AND ELECTRICAL CIRCUIT DIAGRAM BY SYSTEM
CONNECTION TABLE FOR CONNECTOR PIN NUMBERS

INFORMATION CONTAINED IN TROUBLESHOOTING TABLE

INFORMATION CONTAINED IN TROUBLESHOOTING TABLE

TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H-MODE)
SYSTEM CHART FOR HYDRAULIC AND MECHANICAL SYSTEMS
INFORMATION CONTAINED IN TROUBLESHOOTING TABLE
H-1 All work equipment lack power, or travel and swing speeds are slow
H-2 Engine speed sharply drops or engine stalls
H-3 No work equipment, travel or swing move
H-4 Abnormal noise is heard from around hydraulic pump
H-5 Auto-decelerator does not work
H-6 Fine control mode does not function
H-7 Boom moves slowly or lacks power
H-8 Arm moves slowly or lacks power
H-9 Bucket moves slowly or lacks power
H-10 Work equipment does not move in its single operation
H-11 Work equipment has a bit too fast hydraulic drift
H-12 Work equipment has big time lag
H-13 Other work equipment moves when relieving single circuit
H-14 One-touch power max. switch does not operate
H-15 In compound operation, work equipment with larger load moves slowly
H-16 In swing + boom RAISE operation, boom moves slowly
H-17 In swing + travel, travel speed drops sharply
H-18 Machine swerves in travel
H-19 Machine travels slowly
H-20 Machine cannot be easily steered or lacks power
H-21 Travel speed does not shift, or it is too slow or fast.
H-22 Track shoe does not turn (on one side only)
H-23 Machine does not swing
H-24 Swing acceleration is poor, or swing speed is slow
H-25 Excessive overrun when stopping swing
H-26 There is big shock when stopping swing
H-27 There is big abnormal noise caused when stopping swing
H-28 Swing natural drift is too big

30 DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
REMOVAL AND INSTALLATION OF ASSEMBLIES
DisassemblY and assemblY OF assemblIES
PRECAUTIONS WHEN PERFORMING OPERATION
REMOVAL AND INSTALLATION OF STARTING MOTOR ASSEMBLY
REMOVAL
INSTALLATION
REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF RADIATOR ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC OIL COOLER ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE AND HYDRAULIC PUMP ASSEMBLIES
REMOVAL AND INSTALLATION OF FINAL DRIVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY
SKETCHES OF SPECIAL TOOLS
REMOVAL AND INSTALLATION OF SWING MOTOR, SWING MACHINERY ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF SWING MOTOR, SWING MACHINERY ASSEMBLY
SKETCHES OF SPECIAL TOOLS
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY
REMOVAL AND INSTALLATION OF TRACK SHOE ASSEMBLY
EXPANSION OF TRACK SHOE
REMOVAL AND INSTALLATION OF SWING CIRCLE ASSEMBLY
REMOVAL AND INSTALLATION OF REVOLVING FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF CENTER SWIVEL JOINT ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CENTER SWIVEL JOINT ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF CONTROL VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CONTROL VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF OIL SEAL IN HYDRAULIC PUMP INPUT SHAFT
DISASSEMBLY AND ASSEMBLY OF WORK EQUIPMENT PPC VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRAVEL PPC VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLY
REMOVAL AND INSTALLATION OF WORK EQUIPMENT ASSEMBLY
REMOVAL AND INSTALLATION OF AIR CONDITIONER UNIT ASSEMBLY
REMOVAL AND INSTALLATION OF COUNTERWEIGHT ASSEMBLY
REMOVAL AND INSTALLATION OF OPERATOR’S CAB ASSEMBLY
REMOVAL AND INSTALLATION OF MONITOR ASSEMBLY
REMOVAL AND INSTALLATION OF GOVERNOR PUMP CONTROLLER ASSEMBLY

90 OTHERS
hydraulic circuit diagram
electrical circuit diagram (1/4)
FOR multi monitor
electrical circuit diagram (2/4)
FOR multi monitor
electrical circuit diagram (3/4)
FOR multi monitor
electrical circuit diagram (4/4)
FOR multi monitor

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