Komatsu PC18MR-5 Compact Hydraulic Excavator Shop Manual SEN06803-03 – PDF DOWNLOAD

Komatsu PC18MR-5 Compact Hydraulic Excavator Shop Manual SEN06803-03 – PDF DOWNLOAD

FILE DETAILS:

Komatsu PC18MR-5 Compact Hydraulic Excavator Shop Manual SEN06803-03 – PDF DOWNLOAD

Language : English
Pages : 800
Downloadable : Yes
File Type : PDF
Size: 22.3 MB

TABLE OF CONTENTS:

Komatsu PC18MR-5 Compact Hydraulic Excavator Shop Manual SEN06803-03 – PDF DOWNLOAD

00 INDEX AND FOREWORD 00-1
FOREWORD, SAFETY, BASIC INFORMATION 00-8
HOW TO READ THE SHOP MANUAL 00-8
SAFETY NOTICE FOR OPERATION 00-10
PRECAUTIONS TO PREVENT FIRE 00-18
ACTIONS IF FIRE OCCURS 00-20
PRECAUTIONS WHEN YOU DISPOSE OF WASTE MATERIALS 00-21
PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT 00-22
PRECAUTIONS WHEN YOU DISCONNECT AND CONNECT PIPINGS 00-25
PRECAUTIONS WHEN YOU HANDLE ELECTRICAL EQUIPMENT 00-32
PRECAUTIONS FOR HANDLING FUEL SYSTEM EQUIPMENT 00-34
PRECAUTIONS FOR HANDLING INTAKE SYSTEM EQUIPMENT 00-35
PRACTICAL USE OF KOMTRAX 00-36
DISCONNECT AND CONNECT PUSH-PULL TYPE COUPLER 00-37
PRECAUTIONS FOR DISCONNECTION AND CONNECTION OF CONNECTORS 00-41
METHOD FOR DISCONNECTING AND CONNECTING DEUTSCH CONNECTOR 00-45
METHOD FOR DISCONNECTING AND CONNECTING SLIDE LOCK TYPE CONNECTOR 00-46
METHOD FOR DISCONNECTING AND CONNECTING CONNECTOR WITH LOCK TO PULL 00-48
METHOD FOR DISCONNECTING AND CONNECTING CONNECTOR WITH LOCK TO PUSH 00-49
METHOD FOR DISCONNECTING AND CONNECTING CONNECTOR WITH HOUSING TO ROTATE
00-51
STANDARD TIGHTENING TORQUE TABLE 00-52
CONVERSION TABLE 00-59
ABBREVIATION LIST 00-64
01 SPECIFICATION 01-1
CONTENTS 01-2
SPECIFICATIONS 01-3
SPECIFICATION DRAWING 01-3
WORKING RANGE DRAWINGS 01-5
SPECIFICATIONS 01-6
WEIGHT TABLE 01-11
FUEL, COOLANT, LUBRICANT 01-13
10 STRUCTURE AND FUNCTION 10-1
CONTENTS 10-2
BOOT-UP SYSTEM 10-4
LAYOUT DRAWING OF BOOT-UP SYSTEM 10-4
SYSTEM OPERATING LAMP SYSTEM 10-5
BATTERY DISCONNECT SWITCH 10-7
ENGINE SYSTEM 10-8
LAYOUT DRAWING OF ENGINE SYSTEM 10-8
ENGINE CONTROL SYSTEM 10-9
ENGINE SYSTEM 10-11
COOLING SYSTEM 10-12
LAYOUT DRAWING OF COOLING SYSTEM 10-12
CONTROL SYSTEM 10-14
LAYOUT DRAWING OF CONTROL SYSTEM 10-14
MACHINE MONITOR SYSTEM 10-15
KOMTRAX SYSTEM 10-16
CONTROL SYSTEM 10-17
HYDRAULIC SYSTEM 10-24
LAYOUT DRAWING OF HYDRAULIC SYSTEM 10-24
CLSS 10-25
HYDRAULIC SYSTEM 10-28
WORK EQUIPMENT SYSTEM 10-67
LAYOUT DRAWING OF WORK EQUIPMENT SYSTEM 10-67
STRUCTURE OF VALVE CONTROL 10-69
INDEX 00 INDEX AND FOREWORD
00-2 PC18MR-5
PPC LOCK SYSTEM 10-71
WORK EQUIPMENT DOUBLE LOCK SYSTEM 10-73
WORK EQUIPMENT SYSTEM 10-74
SWING SYSTEM 10-90
LAYOUT DRAWING OF SWING SYSTEM 10-90
SWING SYSTEM 10-91
TRAVEL SYSTEM 10-97
LAYOUT DRAWING OF TRAVEL SYSTEM 10-97
SYSTEM DIAGRAM OF TRAVEL CONTROL 10-99
TRAVEL SYSTEM 10-101
UNDERCARRIAGE AND FRAME 10-115
LAYOUT DRAWING OF UNDERCARRIAGE 10-115
SPECIFICATIONS OF UNDERCARRIAGE 10-116
IDLER CUSHION 10-117
WORK EQUIPMENT 10-119
STRUCTURE OF WORK EQUIPMENT 10-119
FUNCTION OF WORK EQUIPMENT 10-120
WORK EQUIPMENT CLEARANCE ADJUSTMENT SHIM 10-121
20 STANDARD VALUE TABLE 20-1
CONTENTS 20-2
STANDARD VALUE TABLE FOR ENGINE 20-3
STANDARD VALUE TABLE FOR ENGINE: PC18MR-5 20-3
STANDARD VALUE TABLE FOR MACHINE 20-5
STANDARD VALUE TABLE FOR MACHINE: PC18MR-5 20-5
MACHINE POSTURE AND PROCEDURES TO MEASURE PERFORMANCE 20-15
30 TESTING AND ADJUSTING 30-1
CONTENTS 30-2
RELATED INFORMATION ON TESTING AND ADJUSTING 30-4
TOOLS FOR TESTING AND ADJUSTING 30-4
ENGINE AND COOLING SYSTEM 30-8
TEST ENGINE SPEED 30-8
TEST EXHAUST GAS COLOR 30-13
CHECK AND ADJUST VALVE CLEARANCE 30-15
TEST COMPRESSION PRESSURE 30-20
TEST ENGINE OIL PRESSURE 30-22
TEST AND ADJUST FUEL INJECTION TIMING 30-25
BLEED AIR FROM FUEL SYSTEM 30-30
TEST FUEL SYSTEM FOR LEAKAGE 30-31
TEST AND ADJUST ALTERNATOR BELT TENSION 30-32
ADJUST FUEL LEVER LINKAGE 30-35
POWER TRAIN 30-36
TEST SWING CIRCLE BEARING CLEARANCE 30-36
UNDERCARRIAGE AND FRAME 30-38
TEST AND ADJUST TRACK TENSION 30-38
HYDRAULIC SYSTEM 30-40
RELEASE PRESSURE REMAINED IN HYDRAULIC CIRCUIT 30-40
TEST AND ADJUST OIL PRESSURE IN WORK EQUIPMENT, TRAVEL, AND SWING CIRCUITS
30-43
TEST AND ADJUST OIL PRESSURE IN CONTROL CIRCUIT 30-50
TEST AND ADJUST OIL PRESSURE IN PUMP LS CONTROL CIRCUIT 30-53
TEST OUTLET PRESSURE IN SOLENOID VALVE 30-56
TEST OUTLET PRESSURE IN PPC VALVE 30-60
ADJUST PLAY OF WORK EQUIPMENT AND SWING PPC VALVES 30-63
TEST RELEASE PRESSURE IN SWING PARKING BRAKE 30-64
TEST TRAVEL DEVIATION 30-66
TEST THE PARTS WHICH CAUSE HYDRAULIC DRIFT OF WORK EQUIPMENT 30-67
TEST OIL LEAKAGE 30-70
PRESSURIZE HYDRAULIC TANK 30-76
00 INDEX AND FOREWORD INDEX
PC18MR-5 00-3
FLOOR 30-81
TILT OF COVER OF TRAVEL PPC LEVER 30-81
ELECTRICAL SYSTEM 30-84
START UP KOMTRAX TERMINAL 30-84
DISPLAY OF KOMTRAX TERMINAL LAMPS 30-90
BATTERY DISCONNECT SWITCH 30-93
TEST DIODE 30-94
Pm-CLINIC 30-96
PM CLINIC SERVICE 30-96
40 TROUBLESHOOTING 40-1
CONTENTS 40-2
RELATED INFORMATION TO TROUBLESHOOT 40-5
GENERAL TROUBLESHOOTING POINTS 40-5
SEQUENCE OF EVENTS IN TROUBLESHOOTING 40-6
CHECKS BEFORE TROUBLESHOOTING 40-8
INSPECTION PROCEDURE BEFORE TROUBLESHOOTING 40-10
TEST IN ACCORDANCE WITH TESTING PROCEDURE 40-11
PREPARATION TO TROUBLESHOOT ELECTRICAL SYSTEM 40-40
PROCEDURE FOR TROUBLESHOOTING 40-42
SYMPTOM AND TROUBLESHOOTING NUMBERS 40-43
INFORMATION DESCRIBED IN TROUBLESHOOTING TABLE 40-46
CONNECTOR AND WIRING HARNESS IDENTIFICATION TABLE 40-48
CONNECTOR LAYOUT 40-59
CONNECTOR CONTACT IDENTIFICATION 40-61
T-BRANCH BOX AND T-BRANCH ADAPTER TABLE 40-103
FUSE LOCATION TABLE 40-109
TABLE OF FAILURE CODE AND USER CODE 40-110
TROUBLESHOOTING BY FAILURE CODE (DISPLAY OF CODE) 40-111
USER CODE [EOE] 40-111
FAILURE CODE [D811MC] 40-113
FAILURE CODE [D862KA] 40-114
FAILURE CODE [DAFGMC] 40-115
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE) 40-116
E-1 ENGINE DOES NOT START (ENGINE DOES NOT CRANK) 40-116
E-2 ENGINE DOES NOT START (FUEL FEED PUMP SYSTEM) 40-122
E-3 PREHEATING SYSTEM DOES NOT OPERATE 40-124
E-4 WHEN YOU TURN STARTING SWITCH TO ON POSITION, ALL ITEMS OF MACHINE MONITOR
DO NOT WORK, OR ONE OF ITEMS DO NOT WORK 40-126
E-5 CHARGE LEVEL CAUTION LAMP LIGHTS UP WHILE ENGINE IS IN OPERATION 40-130
E-6 FUEL LEVEL MONITOR PILOT LAMP LIGHTS UP WHILE ENGINE IS IN OPERATION 40-132
E-7 ENGINE COOLANT TEMPERATURE MONITOR PILOT LAMP FLASHES WHILE ENGINE IS IN
OPERATION 40-133
E-8 ENGINE OIL PRESSURE CAUTION LAMP LIGHTS UP WHILE ENGINE IS IN OPERATION
40-134
E-9 FUEL GAUGE DOES NOT MOVE FROM MINIMUM OR MAXIMUM 40-135
E-10 FUEL GAUGE DOES NOT SHOW CORRECT FUEL LEVEL 40-137
E-11 COOLANT TEMPERATURE GAUGE DOES NOT MOVE FROM MINIMUM OR MAXIMUM40-138
E-12 COOLANT TEMPERATURE GAUGE DOES NOT SHOW CORRECT TEMPERATURE 40-140
E-13 TRAVEL SPEED DOES NOT CHANGE EVEN WHEN YOU OPERATE THE OPERATION TO
CHANGE TRAVEL SPEED 40-141
E-14 ALARM BUZZER DOES NOT MAKE SOUND 40-145
E-15 ALARM BUZZER CANNOT BE STOPPED 40-147
E-16 SERVICE METER IS NOT SHOWN WHILE STARTING SWITCH IS IN OFF POSITION 40-148
E-17 SERVICE METER DOES NOT OPERATE WHILE ENGINE IS IN OPERATION 40-149
E-18 ALL WORK EQUIPMENT, SWING, TRAVEL DO NOT OPERATE 40-150
E-19 ALL WORK EQUIPMENT, SWING, TRAVEL CANNOT BE LOCKED 40-155
E-20 TRAVEL ALARM DOES NOT SOUND DURING TRAVEL 40-159
E-21 TRAVEL ALARM DOES NOT STOP WHEN MACHINE STOPS 40-162
INDEX 00 INDEX AND FOREWORD
00-4 PC18MR-5
E-22 BLADE AND VARIABLE GAUGE SELECTOR SYSTEM DOES NOT OPERATE CORRECTLY
(VARIABLE GAUGE MOVES WHILE BLADE IS SELECTED) 40-164
E-23 BLADE AND VARIABLE GAUGE SELECTOR SYSTEM DOES NOT OPERATE CORRECTLY
(BLADE MOVES WHILE VARIABLE GAUGE IS SELECTED) 40-166
E-24 HORN DOES NOT MAKE SOUND 40-168
E-25 HORN CANNOT BE STOPPED 40-170
E-26 WORKING LAMP DOES NOT LIGHT UP 40-171
E-27 KOMTRAX SYSTEM DOES NOT OPERATE CORRECTLY 40-173
TROUBLESHOOTING FOR HYDRAULIC AND MECHANICAL SYSTEMS (H MODE) 40-175
INFORMATION SHOWN IN TROUBLESHOOTING TABLE (H-MODE) 40-175
H-1 ALL WORK EQUIPMENT, TRAVEL, SWING, BLADE DO NOT OPERATE 40-176
H-2 TRAVEL AND BLADE DO NOT OPERATE 40-177
H-3 ALL WORK EQUIPMENT, TRAVEL, SWING, BLADE SPEED IS LOW OR POWER IS LOW 40-178
H-4 TRAVEL AND BLADE SPEED IS LOW OR POWER IS LOW 40-179
H-5 FINE CONTROL PERFORMANCE OR RESPONSE IS UNSATISFACTORY 40-180
H-6 THERE IS AN UNUSUAL NOISE FROM AROUND MAIN PUMP 40-181
H-7 ENGINE SPEED FALLS LARGELY OR ENGINE STOPS 40-182
H-8 BLADE DOES NOT OPERATE 40-183
H-9 BOOM SPEED OR POWER IS LOW 40-184
H-10 ARM SPEED IS LOW OR POWER IS LOW 40-186
H-11 BUCKET SPEED OR POWER IS LOW 40-187
H-12 BLADE SPEED IS LOW OR POWER IS LOW 40-188
H-13 BOOM SWING SPEED IS LOW OR POWER IS LOW 40-189
H-14 WORK EQUIPMENT DOES NOT MOVE IN SINGLE OPERATION 40-190
H-15 HYDRAULIC DRIFT OF BOOM IS LARGE 40-192
H-16 HYDRAULIC DRIFT OF ARM IS LARGE 40-193
H-17 HYDRAULIC DRIFT OF BUCKET IS LARGE 40-194
H-18 HYDRAULIC DRIFT OF BLADE IS LARGE 40-195
H-19 TIME LAG OF WORK EQUIPMENT IS LARGE 40-196
H-20 IN COMBINED OPERATION OF WORK EQUIPMENT, WORK EQUIPMENT WITH HEAVIER
LOAD MOVES SLOWER 40-197
H-21 MACHINE DOES NOT TRAVEL STRAIGHT 40-198
H-22 MACHINE DOES NOT MOVE OFF STRAIGHT 40-200
H-23 MACHINE IS NOT STEERED WELL OR STEERING POWER IS LOW 40-201
H-24 TRAVEL SPEED IS SLOW 40-203
H-25 ONE OF TRACKS DOES NOT RUN 40-205
H-26 TRAVEL SPEED DOES NOT CHANGE, OR TRAVEL SPEED IS TOO SLOW OR FAST 40-206
H-27 MACHINE DOES NOT SWING TO RIGHT OR LEFT 40-207
H-28 SWINGS ONLY IN ONE DIRECTION 40-209
H-29 SWING ACCELERATION OR SWING SPEED IS LOW IN TWO DIRECTIONS OF RIGHT AND
LEFT 40-211
H-30 SWING ACCELERATION OR SWING SPEED IS LOW IN ONLY ONE DIRECTION 40-212
H-31 UPPER STRUCTURE OVERRUNS EXCESSIVELY WHEN IT STOPS SWING OPERATION
(RIGHT AND LEFT) 40-213
H-32 UPPER STRUCTURE OVERRUNS EXCESSIVELY WHEN IT STOPS SWING OPERATION
(ONLY ONE DIRECTION) 40-214
H-33 SHOCK IS LARGE WHEN UPPER STRUCTURE STOPS SWING OPERATION 40-215
H-34 THERE IS A LARGE UNUSUAL NOISE WHEN UPPER STRUCTURE STOPS SWING OPERATION
40-216
H-35 SWING DRIFT ON A SLOPE IS LARGE (WHILE SWING PARKING BRAKE IS APPLIED) 40-217
H-36 SWING DRIFT ON A SLOPE IS LARGE (WHILE SWING PARKING BRAKE IS RELEASED)
40-218
H-37 VARIABLE GAUGE DOES NOT MOVE 40-219
TROUBLESHOOTING OF ENGINE (S-MODE) 40-220
INFORMATION DESCRIBED IN TROUBLESHOOTING TABLE (S-MODE) 40-220
S-1 ENGINE DOES NOT CRANK WHEN STARTING SWITCH IS TURNED TO START POSITION
40-221
S-2 ENGINE CRANKS BUT NO EXHAUST SMOKE COMES OUT 40-222
00 INDEX AND FOREWORD INDEX
PC18MR-5 00-5
S-3 FUEL IS INJECTED BUT ENGINE DOES NOT START (MISFIRING: ENGINE CRANKS BUT
DOES NOT START) 40-223
S-4 ENGINE STARTABILITY IS UNSATISFACTORY 40-224
S-5 ENGINE DOES NOT PICK UP SMOOTHLY 40-226
S-6 ENGINE STOPS DURING OPERATION 40-227
S-7 ENGINE RUNNING IS NOT STABLE 40-229
S-8 OUTPUT POWER IS LOW (POWER IS LOW) 40-230
S-9 ENGINE OIL CONSUMPTION IS EXCESSIVE 40-232
S-10 ENGINE OIL BECOMES CONTAMINATED QUICKLY 40-233
S-11 FUEL CONSUMPTION IS EXCESSIVE 40-234
S-12 OIL MIXES INTO COOLANT (OR SPURTS BACK, COOLANT LEVEL FALLS) 40-235
S-13 ENGINE OIL PRESSURE FALLS 40-236
S-14 FUEL MIXES INTO ENGINE OIL 40-237
S-15 WATER MIXES INTO ENGINE OIL (MILKY) 40-238
S-16 COOLANT TEMPERATURE RISES TOO HIGH (OVERHEAT) 40-239
S-17 THERE IS AN UNUSUAL NOISE 40-240
S-18 VIBRATION IS EXCESSIVE 40-241
S-19 AIR CANNOT BE BLED FROM FUEL CIRCUIT 40-242
50 DISASSEMBLY AND ASSEMBLY 50-1
CONTENTS 50-2
RELATED INFORMATION ON DISASSEMBLY AND ASSEMBLY 50-4
HOW TO READ THIS MANUAL 50-4
COATING MATERIALS LIST 50-6
SPECIAL TOOLS LIST 50-10
ENGINE AND COOLING SYSTEM 50-12
DRAIN AND ADD COOLANT 50-12
DRAIN AND ADD HYDRAULIC OIL 50-14
REMOVE AND INSTALL RADIATOR ASSEMBLY 50-17
REMOVE AND INSTALL HYDRAULIC OIL COOLER ASSEMBLY 50-23
REMOVE AND INSTALL ENGINE AND MAIN PUMP ASSEMBLY 50-27
REMOVE AND INSTALL FUEL TANK ASSEMBLY 50-37
REMOVE AND INSTALL ENGINE STOP SOLENOID 50-38
POWER TRAIN 50-42
REMOVE AND INSTALL TRAVEL MOTOR ASSEMBLY 50-42
REMOVE AND INSTALL SWING MOTOR ASSEMBLY 50-46
REMOVE AND INSTALL SWING CIRCLE ASSEMBLY 50-52
UNDERCARRIAGE AND FRAME 50-54
DISASSEMBLE AND ASSEMBLE RECOIL SPRING ASSEMBLY 50-54
REMOVE AND INSTALL TRACK ASSEMBLY 50-58
DISASSEMBLE AND ASSEMBLE IDLER ASSEMBLY 50-60
DISASSEMBLE AND ASSEMBLE TRACK ROLLER ASSEMBLY 50-63
REMOVE AND INSTALL REVOLVING FRAME ASSEMBLY 50-65
REMOVE AND INSTALL COUNTERWEIGHT AND FUEL TANK ASSEMBLY 50-69
HYDRAULIC SYSTEM 50-76
REMOVE AND INSTALL CENTER SWIVEL JOINT ASSEMBLY 50-76
REMOVE AND INSTALL HYDRAULIC TANK ASSEMBLY 50-83
REMOVE AND INSTALL MAIN PUMP ASSEMBLY 50-89
WORK EQUIPMENT 50-94
REMOVE AND INSTALL BLADE ASSEMBLY 50-94
REMOVE AND INSTALL WORK EQUIPMENT ASSEMBLY 50-97
DISASSEMBLE AND ASSEMBLE WORK EQUIPMENT CYLINDER ASSEMBLY 50-100
CAB RELATED PARTS 50-108
REMOVE AND INSTALL FLOOR FRAME ASSEMBLY 50-108
REMOVE AND INSTALL OPERATOR’S SEAT 50-124
REMOVE AND INSTALL SEATBELT 50-127
ELECTRICAL SYSTEM 50-129
REMOVE AND INSTALL MACHINE MONITOR ASSEMBLY 50-129
REMOVE AND INSTALL KOMTRAX TERMINAL ASSEMBLY 50-133
INDEX 00 INDEX AND FOREWORD
00-6 PC18MR-5
60 MAINTENANCE STANDARD 60-1
CONTENTS 60-2
EXPLANATION OF TERMS FOR MAINTENANCE STANDARD 60-3
ENGINE AND COOLING SYSTEM 60-5
MAINTENANCE STANDARD OF ENGINE MOUNT 60-5
MAINTENANCE STANDARD OF PTO 60-6
MAINTENANCE STANDARD OF COOLING SYSTEM 60-7
POWER TRAIN 60-8
MAINTENANCE STANDARD OF SWING CIRCLE 60-8
MAINTENANCE STANDARD OF SPROCKET 60-9
UNDERCARRIAGE AND FRAME 60-10
MAINTENANCE STANDARD OF TRACK FRAME AND IDLER CUSHION 60-10
MAINTENANCE STANDARD OF IDLER 60-12
MAINTENANCE STANDARD OF TRACK ROLLER 60-13
MAINTENANCE STANDARD OF TRACK SHOE 60-14
MAINTENANCE STANDARD OF DOUBLE SHOE 60-15
MAINTENANCE STANDARD OF RUBBER SHOE 60-16
HYDRAULIC SYSTEM 60-17
MAINTENANCE STANDARD OF HYDRAULIC TANK 60-17
MAINTENANCE STANDARD OF MAIN PUMP 60-18
MAINTENANCE STANDARD OF SWING MOTOR 60-19
MAINTENANCE STANDARD OF TRAVEL MOTOR 60-20
MAINTENANCE STANDARD OF CONTROL VALVE 60-22
MAINTENANCE STANDARD OF WORK EQUIPMENT AND SWING PPC VALVE 60-31
MAINTENANCE STANDARD OF BLADE PPC VALVE 60-34
MAINTENANCE STANDARD OF BOOM SWING PPC VALVE 60-36
MAINTENANCE STANDARD OF TRAVEL PPC VALVE 60-38
MAINTENANCE STANDARD OF ATTACHMENT PPC VALVE 60-41
MAINTENANCE STANDARD OF CENTER SWIVEL JOINT 60-43
WORK EQUIPMENT 60-44
MAINTENANCE STANDARD OF WORK EQUIPMENT LINKAGE 60-44
DIMENSIONS OF ARM 60-50
DIMENSIONS OF BUCKET 60-52
MAINTENANCE STANDARD OF BOOM CYLINDER 60-53
MAINTENANCE STANDARD OF ARM CYLINDER 60-54
MAINTENANCE STANDARD OF BUCKET CYLINDER 60-55
MAINTENANCE STANDARD OF BLADE CYLINDER 60-56
MAINTENANCE STANDARD OF BOOM SWING CYLINDER 60-57
MAINTENANCE STANDARD OF VARIABLE GAUGE CYLINDER 60-58
90 CIRCUIT DIAGRAMS 90-1
CONTENTS 90-2
HOW TO READ THE CODES FOR ELECTRIC CABLE 90-3
HYDRAULIC CIRCUIT DIAGRAM 90-7
SYMBOLS USED IN HYDRAULIC CIRCUIT DIAGRAM 90-7
HYDRAULIC CIRCUIT DIAGRAM 90-11
HYDRAULIC CIRCUIT DIAGRAM (AT BOOM RAISE OPERATION) 90-13
HYDRAULIC CIRCUIT DIAGRAM (AT LEFT SWING OPERATION) 90-15
HYDRAULIC CIRCUIT DIAGRAM (AT BOOM RAISE AND LEFT SWING OPERATION) 90-17
ELECTRICAL CIRCUIT DIAGRAM 90-19
SYMBOLS USED IN ELECTRIC CIRCUIT DIAGRAM 90-19
ELECTRICAL CIRCUIT DIAGRAM 90-23
CONNECTOR AND WIRING HARNESS CHART 90-25
CONNECTOR AND WIRING HARNESS CHART (1/3) 90-27
CONNECTOR AND WIRING HARNESS CHART (2/3) 90-29
CONNECTOR AND WIRING HARNESS CHART (3/3) 90-31
INDEX 1

DESCRIPTION:

Komatsu PC18MR-5 Compact Hydraulic Excavator Shop Manual SEN06803-03 – PDF DOWNLOAD

SERIAL NUMBERS 30001 and up

FOREWORD, SAFETY, BASIC INFORMATION:
HOW TO READ THE SHOP MANUAL:
• Some of the attachments and options described in this shop manual may not be available in some areas. If
they are required, consult your Komatsu distributor.
• The materials and specifications are subject to change without notice.
• Shop Manuals are available for “machine part” and “engine part”. For the engine unit, see the shop manual
for the machine which has the same engine model.
• Actual machine may differ from the images which are contained in this manual. A typical model is shown in
the illustrations of this shop manual.
Composition of the shop manual
This shop manual contains technical information necessary to perform services in workshops. It is divided into
the following chapters for the ease of use.
00 INDEX AND FOREWORD:
This section describes the index, foreword, safety, and basic information.
01 SPECIFICATIONS
This section describes the specifications of the machine.
10 STRUCTURE AND FUNCTION
This section describes the structure and operation of each component with respect to each system. “STRUCTURE
AND FUNCTION” is helpful in not only understanding the structure of each component but performing
troubleshooting.
20 STANDARD VALUE TABLE
This section describes the standard values for new machine and failure criteria for testing and adjusting, and
troubleshooting. Use the standard values table to check the standard values for testing and adjusting, and judge
troubles in troubleshooting.
30 TESTING AND ADJUSTING
This section describes the measuring tools and measuring methods for testing and adjusting as well as the adjusting
method of each part. The standard values and repair limit for TESTING AND ADJUSTING are described
in “STANDARD VALUE TABLE”.
40 TROUBLESHOOTING
This section describes troubleshooting of failure part and its remedy method on the occurrence of the failure.
Descriptions of troubleshooting are sorted by failure mode.
50 DISASSEMBLY AND ASSEMBLY
This section describes the special tools, work procedures, and safety precautions necessary for removal, installation,
disassembly, and assembly of the components and parts. In addition, tightening torques, quantity, and
weight of the coating materials, lubricants, and coolant necessary to these works are shown.
60 MAINTENANCE STANDARD
This section describes the maintenance standard value of each component. The maintenance standard shows
the criteria and remedies for disassembly and assembly.
80 THE OTHER INFORMATION
This section describes the structure and function, testing and adjusting, and troubleshooting for all of the other
components or equipment which cannot be separately classified in the appendix.
90 Circuit diagrams
This section describes hydraulic circuit diagrams and electrical circuit diagrams.

IMAGES PREVIEW OF THE MANUAL: