Komatsu Hydraulic Excavator PC300-8M2 Parts Book YEPB204100-00 2026

Description

Contents:
ENGINE CYLINDER HEAD AND ITS RELATED PARTS
Cylinder Head
Head Cover
AVC00-001001 37
Breather
ABR00-001001 38
Air Intake Manifold
AIM00-001001 39
Air Intake Connector
AIC00-001001 40
Air Intake Connector Mounting
AIC20-001001 41
Air Intake Heater
AAH00-001001 42
Air Cleaner
Aftercooler
Exhaust Manifold
ATB30-001001 45
Turbocharger
Turbocharger Oil Piping
ATP00-001001 47
Exhaust Connection
AIT00-001001 48
Heat Shield
Exhaust Muffler
Exhaust Muffler Drain
Rocker Arm Housing and Rocker Arm
ARL00-001001 52
Lifting Arrangement
ALA00-001001 53
Lifting Arrangement Bolt
ALA10-001001 54
Coolant Piping
ARP00-001001 55
Exhaust Connector Clamp
AXS00-001001 56
ENGINE CYLINDER BLOCK AND ITS RELATED PARTS
Cylinder Block
Cylinder Block Cover
AOB10-001001 59
Engine Oil Pan
Engine Oil Level Gauge
ALG00-001001 6123
Front Gear Cover
Tappet
ABB00-001001 63
Front Gear Train Cover
ADF10-001001 64
Accessory Drive Pulley
APA00-001001 65
Flywheel Housing
Flywheel
AFW00-001001 67
Flywheel Mounting
AFW10-001001 68
Engine Oil Level Sensor
ASD00-001001 69
Crankshaft
Vibration Damper
ADA00-001001 71
Piston and Connecting Rod
Crank Pulley
AAF00-001001 73
Breather Hose
Camshaft
ENGINE LUBRICATION SYSTEM
Engine Oil Pump
ALP00-001001 78
Engine Oil Filter
ALF00-001001 79
O-ring
Engine Oil Cooler
ALC00-001001 81
ENGINE FUEL SYSTEM
Fuel Injection Piping
APP50-001001 84
Fuel Supply Pump
Inner Parts
Mounting
Fuel Supply Pump Mounting
AFP20-001001 87
Fuel Filter
Support
Fuel Filter Piping
AFF20-001001 89
Fuel Injector
Fuel Piping
AFT00-001001 91
Fuel Filter Cartridge
Fuel Prefilter
Fuel Inlet Fitting
AFI00-001001 95
Fuel System Accessory
AFS20-001001 96
Fuel Transfer Pump
AFS00-001001 97
ENGINE COOLING SYSTEM
Thermostat
AEC00-001001 100
Water Pump
Water Pump Mounting
AWP00-001001 102
Cooling Fan
Cooling Fan Belt
AFA30-001001 104
Cooling Fan Belt Tensioner
AWP20-001001 105
Cooling Fan Drive Mounting
Bolt
Cooling Fan Drive Pulley
AFA10-001001 107
Water Pump Drive Belt
AWP10-001001 108
Water Outlet Connector
AWO00-001001 109
Water Inlet Connector
AWI10-001001 110
ENGINE ELECTRICAL SYSTEM
Alternator
Inner Parts, Alternator (60Amp.)
Alternator Mounting
AEH20-001001 114
Starting Motor
Inner Parts, Starting Motor (7.5KW)
Starting Motor Mounting
ASM00-001001 116
Wiring Harness
AWR00-001001 117
ENGINE ACCESSORIES AND OTHERS
Engine Controller
Engine Controller Related Parts
Piping
Engine Control Module
APH00-001001 122
ENGINE MARKS AND PLATES
Caution Plates
Name Plate
FIELD REPAIR SERVICE PARTS
Repair Service Parts
Spare Parts
ENGINE RELATED PARTS
Engine Mounting
Coolant Filter
Related Parts
COOLING SYSTEM
Cooling System
Radiator and Oil Cooler
Shroud (1/2)
Aftercooler and Condenser
Radiator Piping
Shroud (2/2)
Reservoir Tank and Piping
Reservoir Tank Piping
FUEL SYSTEM
Fuel Tank
(Refueling Pump)
(Refueling Pump,Large Fuel Prefilter)
Hose (Large Fuel Prefilter)
Hose (Water Separator)
Inner Parts, Fuel Prefilter (Large Fuel Prefilter)
Inner Parts, Fuel Prefilter (Water Separator)
Plug
Water Separator Piping
Clamp (Large Fuel Prefilter)
Clamp (Water Separator)
Water Separator
ELECTRICAL SYSTEM
Battery
(Large Capacity)
(Large Capacity Maintenance-free)
Electric Wiring Harness
Starting Wiring Harness Clip
Main Wiring Harness (1/2) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional
Filter)
Main Wiring Harness (1/2) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel
Prefilter)
Wiring Harness Clip (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter)
Wiring Harness Clip (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel
Main Wiring Harness (2/2)
Working Lamp
Additional Working Lamp
Additional Rear Working Lamp
Beacon Lamp
Horn
Travel Alarm
Rearview Camera
Rearview Camera Less
HYDRAULIC SYSTEM
Hydraulic Tank
Tank
Breather Mounting
Inner Parts, Bypass Valve
Cover
Control Valve
8-Spool (1/25)
8-Spool (2/25)
8-Spool (3/25)
8-Spool (4/25)
8-Spool (5/25)
8-Spool (6/25)
8-Spool (7/25)
8-Spool (8/25)
8-Spool (9/25)
8-Spool (10/25)
8-Spool (11/25)
8-Spool (12/25)
8-Spool (13/25)
8-Spool (14/25)
8-Spool (15/25)
8-Spool (16/25)
8-Spool (17/25)
8-Spool (18/25)
8-Spool (19/25)
8-Spool (20/25)
8-Spool (21/25)
8-Spool (22/25)
8-Spool (23/25)
8-Spool (24/25)
8-Spool (25/25)
Control Valve Related Parts (1/2) (1-Additional Actuator Piping, Accumulator)
Control Valve Related Parts (1/2) (1-Service Valve)
Control Valve Related Parts (2/2) (1-Additional Actuator Piping, Accumulator)
Control Valve Related Parts (2/2) (1-Service Valve)
Valve Bracket (1-Additional Actuator Piping, Accumulator)
Valve Bracket (1-Service Valve)
Blind Parts
Hydraulic Pump
Piston Pump (1/12)
Piston Pump (2/12)
Piston Pump (3/12)
Piston Pump (4/12)
Piston Pump (5/12)
Piston Pump (6/12)
Piston Pump (7/12)
Piston Pump (8/12)
Piston Pump (9/12)
Piston Pump (10/12)
Piston Pump (11/12)
Piston Pump (12/12)
Suction Piping
Delivery Piping
Oil Cooler Piping
Return Piping
Drain Piping
Boom Piping
Valve Boom Piping
Bracket and Clamp
Arm and Bucket Piping
(1/2)
(2/2)
Arm Hydraulic Drift Prevention Valve
Valve Mounting
Actuator Piping
Main Piping, L.H.
Selector Valve
Main Piping, R.H.
Accumulator
Pilot Filter
Relief Valve
(Pressure Regulator Valve, 210kg/cm2)
(Pressure Regulator Valve, 250kg/cm2)
Travel Piping
Swing Piping
LS Piping
Solenoid Valve
Inner Parts (1-Additional Actuator Piping, Accumulator)
Related Parts (1-Additional Actuator Piping, Accumulator)
Hose
Hose (1-Additional Actuator Piping, Accumulator)
Clamp
Clamp (1-Additional Actuator Piping, Accumulator)
Pressure Switch Block
Sensor
Slow Return Valve
Bracket
Proportional Pressure Control (PPC) Valve Piping
FRAME AND ITS RELATED PARTS
Revolving Frame
Boom Foot Pin
OPERATOR’S COMPARTMENT AND CONTROL SYSTEM
Operator’s Seat
Seat Belt
(50mm, 2-Point Type, Rigid Type Operator’s Seat)
(78mm, 2-Point Type, Rigid Type Operator’s Seat)
Top Guard
Front Guard
(Full Guard LV1)
(Full Guard LV2)
(Half Guard)
Floor Mat
Rain Visor
Roller Shades
Front
Window Washer Tank
Air Conditioner Unit
Compressor
Compressor Mounting
Cab
Cab Body and Window
Front Window
Front Lower Window
Roof Ventilator (With Ceiling Window)
Roof Ventilator
Door
Door Lock
Open Lock and Door Catch
Wiper and Room Lamp
Rubber Antenna
Speaker and Window Washer
Roof Cover, Hanger, Drink Holder and Air Intake
Roof Cover and Air Intake
Grip
Gateway Function Controller Antenna
Gateway Function Controller Antenna (IRIDIUM)
Gateway Function Controller Antenna (Gateway Function Controller, Modem Less)
KOMATSU Mark
Plate
Cab In Parts, Console Cover, Front, R.H.
Cab In Parts, Monitor Cover
Cab In Parts, Washer Hose Mounting
Cab In Parts, Luggage Plate and Cigarette Lighter
Cab In Parts, Air Duct
Cab In Parts, Air Duct and Fresh Air Filter
Cab In Parts, Partition and Recirculation Air Filter
Cab In Parts, Pump Controller and Relay
Cab In Parts, Air Conditioner Controller
Cab In Parts, Main Wiring Harness Clamp
Cab In Parts, Rear Cover, With 12V Converter
Cab In Parts, Rear Cover, With 12V Converter (Gateway Function Controller, Modem Less)
Controller and Monitor (Gateway Function Controller)
Controller and Monitor (Gateway Function Controller, IRIDIUM)
Controller and Monitor (Gateway Function Controller, Modem Less)
Controller and Monitor (Gateway Function Controller, North America and Latin America)
Floor, Frame
PPC Valve (1/4)
Floor, Travel Control Lever
Floor, Footrest, L.H.
PPC Valve (2/4) (1-Additional Actuator Piping, Accumulator)
Floor, Footrest, R.H.
Floor, 1st Attachment Control
Floor, Base
Floor, Wiring Harness
Floor, Wiring Harness Clamp and Ground
Floor, Window Washer Hose
Floor, Work Equipment Control Lever, L.H.
PPC Valve (3/4) (L.H.)
Floor, PPC Valve Mounting for Work Equipment, L.H.
Floor, Console, L.H.
Floor, Radio and Work Equipment Lock Lever (Gateway Function Controller, North America and
Latin America)
Floor, Radio and Work Equipment Lock Lever
Floor, Work Equipment Lock Lever
Floor, Armrest, L.H.
Floor, Work Equipment Control Lever, R.H.
PPC Valve (4/4) (R.H.)
Floor, PPC Valve Mounting for Work Equipment, R.H.
Floor, Console, R.H. (Amber Color Warning Beacon, ISO)
Floor, Console, R.H.
Floor, Armrest, R.H.
Air Conditioner Unit (1/3)
Air Conditioner Unit (2/3)
Air Conditioner Unit (3/3)
Floor, Air Conditioner Mounting
Floor, Air Conditioner Piping
Floor, PPC Piping for Travel Valve
Floor, PPC Valve Piping for Work Equipment
Floor, Piping Mounting
Floor, P, T Block
Floor, P, T Block (1-Additional Actuator Piping, Accumulator)
Floor, Seal
Floor Mounting
PPC Piping
Proportional Pressure Control (PPC) Piping
Switch
GUARDS AND COVERS30
Engine Hood
Machine Cab Frame
Side Cover L.H.
Side Cover R.H.
(Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel Prefilter)
Machine Cab Partition
(2/2) (Refueling Pump)
Machine Cab Cover
Cover and Duct
Inner Parts, Pre-cleaner
Battery Case
Handrail
Rearview Mirror L.H.
Rearview Mirror R.H.
Rearview Mirror
Counterweight
(5470kg)
(6370kg)
Counterweight Mounting
Under Cover
(1/3) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter)
(1/3) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter,Refueling Pump) M1810-030001 408
(1/3) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel Prefilter,Refueling
Pump)
(1/3) (Heavy Duty Type)
(2/3)
(2/3) (Heavy Duty Type)
(3/3) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter)
(3/3) (Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel Prefilter)
(3/3) (Heavy Duty Type)
Revolving Frame, Center
SWING CIRCLE AND ITS RELATED PARTS
Swing Circle
Swing Machinery and Motor
Inner Parts, Swing Motor (1/3)
Inner Parts, Swing Motor (2/3)
Inner Parts, Swing Motor (3/3)
Swing Machinery
Swing Machinery (Supply Only)
Swing Motor Connecting Parts
Swivel Joint
TRAVEL SYSTEM AND ITS RELATED PARTS
Travel Motor and Final Drive
Inner Parts, Travel Motor, L.H. (1/6)
Inner Parts, Travel Motor, L.H. (2/6)
Inner Parts, Travel Motor, L.H. (3/6)
Carrier, L.H.
Inner Parts, Travel Motor, L.H. (4/6)
Inner Parts, Travel Motor, L.H. (5/6)
Inner Parts, Travel Motor, L.H. (6/6)
Carrier, R.H.
UNDERCARRIAGE
Front Idler and Idler Cushion
Idler
Cushion
Track Roller
Carrier Roller
Track Shoe Assembly
(Oblong Holed Triple Grouser Shoe, 600mm Width, Grease Sealed Type, 90 Set)
(Oblong Holed Triple Grouser Shoe, 700mm Width, Grease Sealed Type, 90 Set)
(Oblong Holed Triple Grouser Shoe, 800mm Width, Grease Sealed Type, 90 Set)
Track Link Assembly
(Supply Only, 90 Set,Grease Sealed Type)
Track Frame
Track Frame Under Cover
(Under Cover)
Track Roller Guard
(Full Length)
WORK EQUIPMENT
Boom
Boom and Top Pin (6000mm, SE)
Boom and Top Pin (6500mm Heavy Duty Type)
Arm Cylinder Piping (6000mm, SE)
Arm Cylinder Piping (6500mm Heavy Duty Type)
Lubrication Piping (6000mm, SE)
Lubrication Piping (6500mm Heavy Duty Type)
Bucket Cylinder Piping (6000mm, SE)
Bucket Cylinder Piping (6500mm Heavy Duty Type)
Cylinder Pin and Working Lamp
Cylinder Pin and Working Lamp (1-Additional Actuator Piping, Accumulator)
Attachment Plug
Additional Piping (6000mm, SE, 1-Attachment)
Additional Piping (6500mm Heavy Duty Type, 1-Attachment)
Boom Cylinder
L.H.
R.H.
Arm Cylinder
Arm
Arm and Bushing (2200mm, 100 Hours Lubrication Interval)
Arm and Bushing (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication Interval)
Arm and Bushing (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication
Interval,North America and Latin America)
Arm and Bushing (2600mm, Heavy Duty Type, 100 Hours Lubrication Interval)
Arm and Bushing (2600mm, 1-Attachment, 100 Hours Lubrication Interval)
Arm and Bushing (2600mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication Interval)
Arm and Bushing (3200mm, Heavy Duty Type, 100 Hours Lubrication Interval)
Bucket Cylinder
Inner Parts, Bucket Cylinder
Bucket Cylinder (3200mm, Heavy Duty Type, 100 Hours Lubrication Interval)
Bucket Link
Bucket Cylinder Hose and Pin (2200mm, 100 Hours Lubrication Interval)
Bucket Cylinder Hose and Pin (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication
Interval)
Bucket Cylinder Hose and Pin (2600mm, Heavy Duty Type, 100 Hours Lubrication Interval)
Bucket Cylinder Hose and Pin (2600mm, 1-Attachment, 100 Hours Lubrication Interval)
Bucket Cylinder Hose and Pin (2600mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication
Bucket Cylinder Hose and Pin (3200mm, Heavy Duty Type, 100 Hours Lubrication Interval)
Additional Piping (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication Interval)
Additional Piping (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication Interval,North
America and Latin America)
Additional Piping (2600mm, 1-Attachment, 100 Hours Lubrication Interval)
Additional Piping (2600mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication Interval)
Valve for Additional Piping (2200mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication
Valve for Additional Piping (2600mm, 1-Attachment, 100 Hours Lubrication Interval)
Valve for Additional Piping (2600mm, Heavy Duty Type, 1-Attachment, 100 Hours Lubrication
Shipping Parts
Bucket
(1/3) (1.32m3, 1340mm Width, Vertical Pin Type)
(1.50m3, 1260mm Width, Horizontal Pin Type, Side Shroud)
(1.60m3, 1640mm Width, KMAX2 Tooth, Thrust Adjustment, Side Cutter)
(1.80m3, 1700mm Width, Horizontal Pin Type)
(2/3) (1.32m3, 1340mm Width, Vertical Pin Type)
(3/3) (1.32m3, 1340mm Width, Vertical Pin Type)
Me Bucket
(1.60m3, 1535mm Width, KMAX2 Tooth, Thrust Adjustment, Side Cutter)
(1.90m3, 1515mm Width, KMAX2 Tooth, Thrust Adjustment, Side Shroud)
Breaker
(Flat Chisel)
(Point Chisel)
Breaker Adapter
(Komatsu)
(Krupp Breaker Kit)
(Matsuda Breaker Kit)
(Okada Breaker Kit)
(2/2) (Montabert Breaker Kit)
(2/2) (Nippon Pneumatic Breaker Kit)
MARKS AND PLATES
Marks and Plates
Lubrication Chart
Caution Plates, Window Lock
Komatsu Logo
(Additional)
(Without Boom)
Lifting Capacity Chart
Caution Plates, Battery
Coolant Decal
Caution Plates, Blast Site
Caution Plates, Keep Off Working Ranges
FOPS Plate
(Cab Front Full Guard LV2)
(Cab Front Full Guard LV2, Top Guard LV2)
ROPS Plate
Rivet
Plates, Air Cleaner
Caution Plates, Accumulator
(Montabert or Nippon Pneumatic Breaker Kit)
Caution Plates, Backward
(Pictorial Type)
AUXILIARY PARTS AND TOOL
General Tool Set
OTHER EQUIPMENT
Preventive Maintenance Service Connectors
Refueling Pump
(With Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter)
(With Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Large Fuel Prefilter)
Drain Hose
FIELD REPAIR SERVICE PARTS34
Service Kit Parts