Komatsu PC45R-8(S/N F20001-Up)
Komatsuhydraulic excavatorsmall ( - pc90)

Komatsu PC45R-8(S/N F20001-Up)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu PC45R-8 (S/N F20001-Up) is a compact mini excavator designed for high performance in tight-access environments. Produced between 1999 and 2004, this machine falls within the 4.75 t (4750 kg) weight class and features a Komatsu 4D84E-3FA engine delivering 38 HP (28 kW) net power. The series is characterized by its versatile configuration, offering a maximum digging depth of 354 cm (139 in.) and a compact tail swing radius of 149.4 cm (58.8 in.).

Across the PC45R-8 production run, improvements focused on hydraulic efficiency and operator comfort. In today's used market, this machine remains highly valued for its durability and ease of maintenance. The availability of Komatsu Genuine parts and the integration of telematics for remote monitoring make it a reliable choice for rental fleets and utility contractors looking for proven reliability in a small-footprint package.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Komatsu PC45R-8(S/N F20001-Up) specifications

Engine

Model4D84E-3FA
Gross Power44.1 hp (33 kW)
Net Power38.8 hp (28.9 kW) to 39 hp (29 kW)
Displacement121.8 cu in (1,995.9 cc)
Cylinders4
AspirationNatural
Rated Power2500 RPM
Max Torque87.1 lb-ft (118.1 Nm)

Weights

Operating Weight4,750 kg (10,472 lbs)
Ground Pressure28.4 kPa (4.12 psi) to 29.0 kPa (4.2 psi)

Dimensions

Transport Length5.486 m (216 in) to 5.49 m (216.14 in)
Transport Width1.9 m (6.23 ft) to 1.92 m (75.6 in)
Transport Height2.56 m (8.4 ft)
Tail Swing Radius1.47 m (4.83 ft) to 1.494 m (58.8 in)
Track Shoe Width400 mm (15.75 in) to 40.1 cm (15.8 in)
Ground Clearance340 mm (1.12 ft) to 36.6 cm (14.4 in)
Undercarriage Length1.94 m (6.37 ft)
Track Gauge152.4 cm (60 in) to 1500 mm (4.93 ft)

Performance

Max Dig Depth3.52 m (11.55 ft) to 3.302 m (130 in)
Max Reach at Ground5.81 m (19.07 ft) to 6.16 m (229.2 in)
Max Dump Height4.19 m (13.75 ft) to 4.395 m (165.6 in)
Max Cutting Height5.76 m (18.9 ft) to 5.955 m (234.5 in)
Swing Speed9 RPM
Travel Speed4.6 km/h (2.86 mph) to 4.7 km/h (2.9 mph)
Max Vertical Wall Digging Depth2.6 m (8.54 ft) to 2.865 m (112.8 in)

Forces

Hydraulic Pump Flow Capacity129 LPM (34.3 GPM)
Relief Valve Pressure250 bar (3626 psi)

Service capacities (summary)

Fuel Tank Capacity51.5 l (13.7 gal) to 51.9 l (14 gal)
Hydraulic System Capacity33 l (8.8 gal) to 33.3 l (9 gal)
Engine Oil Capacity8 l (2.2 gal)
Cooling System Capacity7.5 l (2 gal) to 7.6 l (2 gal)

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

PC45R-8(S/N F20001-Up) fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)8.3 L (2.2 gal) to 8 L (2.1 gal)Komatsu Diesel engine oil; varies by configuration/series
Cooling system7.5 L (2.0 gal) to 7.6 L (2.0 gal)Komatsu Super-coolant AF-NAC
Fuel tank51.5 L (13.6 gal) to 51.9 L (13.7 gal)Diesel
Hydraulic system total33 L (8.7 gal) to 33.3 L (8.8 gal)Komatsu Hydraulic oil
Hydraulic tankVerify with your dealer
Final drive (each)Verify with your dealer
Swing driveVerify with your dealer
GreaseVerify with your dealerKomatsu Grease

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Komatsu PC45R-8(S/N F20001-Up) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Inspect hydraulic fluid level via sight glass
  • Verify coolant level and cap security
  • Drain water from fuel water separator
  • Inspect track tension and shoe/pad condition
  • Check for hydraulic hose cracks or leaks
  • Clean radiator and oil cooler fins of debris
Every 250 h
  • Change engine oil and filter
  • Grease all boom, stick, bucket, and swing bearing points
  • Check air filter outer element
  • Inspect belts, hoses, and clamps
  • Perform visual walk-around inspection
Every 500 h
  • Replace fuel filter and water separator element
  • Replace hydraulic return filter
  • Perform battery service and terminal inspection
  • Conduct coolant SCA test
  • Take oil sample for analysis
Every 1,000 h
  • Replace fuel filter and water separator element
  • Replace hydraulic return filter
  • Perform hydraulic oil sample analysis
  • Inspect final drive oil levels
  • Check turbocharger and valve adjustment status
  • Conduct structural inspection of boom and stick welds
Every 2,000 h
  • Change hydraulic system oil
  • Flush or replace engine coolant
  • Replace final drive oil on both sides
  • Perform comprehensive component evaluation
  • Inspect swing machinery oil levels

Servicing the PC45R-8(S/N F20001-Up) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize Komatsu Oil Wear Analysis (KOWA) at every major service interval to monitor engine and hydraulic health. Track wear metals like iron and copper, as well as contaminants such as silicon or sodium, via laboratory sampling. For the 4D84E-3FA engine, regular monitoring of coolant SCA levels and pH is critical to prevent internal corrosion. Use telematics data to track fuel consumption and fault codes for proactive fleet management.

Corrective & Common Repairs

Monitor hydraulic hose condition frequently to prevent pressure loss or environmental contamination. Common repair points include replacing worn pins, bushings, and attachment points due to high-stress digging cycles. If hydraulic performance drops, inspect the relief valve pressure (250 Bar / 3626 psi) and check for leaks in the return filter circuit. Ensure all track shoes and pads per side are properly tensioned to prevent undercarriage damage.

Overhaul & Rebuild Points

During major overhauls, focus on the hydraulic pump flow capacity (129 LPM / 34.3 GPM) and swing mechanism integrity. Inspect the final drive oil and swing machinery oil for metal particulates. For high-hour machines, evaluate the turbocharger and valve adjustments. A comprehensive evaluation of structural welds on the boom and stick is mandatory to ensure long-term chassis stability during heavy loading or lifting operations.

Seasonal & Environment Servicing

In dusty environments, prioritize frequent cleaning of the radiator and oil cooler fins to prevent overheating. During cold weather operation, verify engine oil viscosity and ensure the cooling system is properly prepared. Regularly drain water from the fuel separator to prevent freezing or microbial growth in the 51.9 L (13.7 gal) fuel tank. Check track tension adjustments before entering muddy or high-debris job sites.

PC45R-8(S/N F20001-Up) common service parts

Part numberPart
YM129100-55650Element,Fuel FilterCheck fitment →
YM129612-55620Fuel Filter Ass'YCheck fitment →
YM119808-12520Element,OuterCheck fitment →
823001143Filter Cartridge WrenchCheck fitment →
3F4554052FilterCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

PC45R-8(S/N F20001-Up) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
AA10NXAir cleaner cloggingDirty or obstructed air filter elementReplace the air filter
CA115Engine crankshaft speed sensor failureBroken sensor, wiring harness issue, or connector corrosionReplace the speed sensor and verify voltage at the pin connector
CA122Intake air pressure sensor feedback voltage too highSensor malfunction or wiring faultVerify the intake pressure sensor and associated wiring
CA123Intake air pressure sensor feedback voltage too lowSensor short circuit or airflow restrictionCheck for a sensor short or an airflow restriction
CA144Coolant temperature sensor feedback voltage faultHigh temperature sensor feedback or low voltage/short circuitInspect the coolant temperature sensor and wiring
CA153Intake air temperature sensor feedback voltage too highFaulty intake air temperature (IAT) sensorReplace or test the IAT sensor
CA154Intake air temperature sensor feedback voltage too lowFaulty intake air temperature (IAT) sensorReplace or test the IAT sensor
CA234Engine overspeedThrottle calibration error, engine load cycle issues, or operator misuseVerify throttle calibration and check engine load conditions
CA451Common rail pressure sensor feedback value too highMalfunctioning rail sensor or actual overpressure conditionDiagnose the fuel rail pressure sensor or pump lines
CA452Common rail pressure sensor feedback value too lowMalfunctioning rail sensor or actual underpressure conditionDiagnose the fuel rail pressure sensor or pump lines
E10Engine controller power failureEngine controller (ECM) power malfunction or wiring harness issueInspect ECM power connections, fuses, or ground wires
E11Engine protection—output power reducedEngine control system failure to protect the engineCheck coolant temperature, oil pressure, and air filter

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

PC45R-8(S/N F20001-Up) attachments & work tools

Buckets

Available in digging and ditching configurations. Capacities range from 0.1 m³ (0.1 yd³) to 0.3 m³ (0.3 yd³), with a specific width of 0.6 m (2 ft) noted for certain models.

Hydraulic hammers

Compatible sawhead attachments are available for this machine class.

Quick couplers

The machine is compatible with quick coupler attachment systems.

Thumbs/grapples

Thumb kits are available for the PC45R-8 to assist with material handling.

Rippers

Frost ripper attachments are available for use on this excavator class.

Hydraulic-kit notes

Hydraulic kits are available. The machine utilizes a 4D84E-3D engine and features a hydraulic pump flow capacity of 129 LPM (34.3 GPM).

All PC45R-8(S/N F20001-Up) assemblies by section

Every catalogued assembly group for the Komatsu PC45R-8(S/N F20001-Up). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Control System And Revolving Frame
Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Attachment Control Pedal
3F***51Pedal1
3F***52Support1
80***08Bolt (Only With Cabin)2
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Blade Control Lever
Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Boom Swing Control Pedal
3F***50Support1
3F***51Pedal1
3F***52Support1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Control Valve (Mounting Parts)
3F***78Support1
3F***79Support1
3F***80Plate3
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Counter Weight
3F***51Ballast1
80***52Bolt2
80***05Washer2
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Fuel Control Lever
39***39Pin1
3F***50Fuel Lever1
3F***90Cover1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : L.H. Lock Lever
30***67Bushing1
39***33Pin1
3F***73Pin1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : L.H. Servocontrol
39***37Hose1
39***78Hose1
39***79Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Lateral Protection
3F***04Protection, L.H1
3F***05Protection, R.H1
80***12Bolt4
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Lubricating Oil System
20***09Union6
3F***50Support1
50***93Hose2
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : R.H. Lock Lever
30***67Bushing1
39***38Pin1
3F***59Lever, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : R.H. Servocontrol
39***77Hose2
39***78Hose2
3F***64Elbow2
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Revolving Frame
3F***25Gasket2
3F***26Gasket2
3F***27Gasket1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Servocontrol Lock System
39***37Pin1
39***09Spacer3
3F***50Cylinder, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Supporto R.H. Ppc Valve (For Cabin)
30***67Bushing1
39***38Pin1
3F***68Link1
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Komatsu : Pc45r-8(S/N F20001-Up) : Control System And Revolving Frame : Travel Control Lever
3F***62Cable, Assembly2
3F***56Support1
3F***57Pin1
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Engine
Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Camshaft And Driving Gear
YM***02Nut1
YM***80Camshaft Ass'Y1
YM***01Gear Ass'Y,Camshaft1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Cooling Water System
YM***40Joint1
YM***02Bolt Plated2
YM***20Gasket,Water Pump1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Crankshaft And Piston
YM***00Gear,Crank1
YM***00Screw8
YM***90Flywheel Ass'Y1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Cylinder Block
YM***60Cylinder Block, Assembly1
YM***00Bolt,Head18
YM***20Screw10
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Cylinder Head
87***24Motor, Assembly1
YM***80Retainer, Spring8
YM***40Seal,Valve? Exhaust (Kit)4
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Exhaust Manifold And Silencer
YM***02Screw6
YM***00Manifold, Exhaust1
YM***10Gasket (Kit)1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Flywheel - Lubricating Oil Sump
YM***30Spacer1
YM***02Screw4
YM***70Screw6
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Fuel Injection Line
YM***70Union1
YM***00Nozzle, Assembly4
YM***20Pipe1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Fuel Injection Pump
YM***70Retainer, Spring4
YM***50Kit, Shim1
YM***10Plate? Caution1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Fuel Line
YM***10Cup, Strainer1
YM***10Pipe1
YM***02Bolt Plated2
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Gasket Set - Tool (Optional)
YM***60O-Ring,Fuel Injection Pump1
YM***40Seal,Valve? Exhaust (Kit)4
YM***20Gasket,Water Pump1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Gear Housing
YM***60O-Ring,Fuel Injection Pump1
YM***02Bolt Plated2
YM***51Cap, Lub. Oil Supply1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Generator
YM***00Adjuster, Belt1
YM***02Nut1
YM***02Screw1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Governor
YM***01Weight Assembly., Governor1
YM***40Lever,Control1
YM***30Spacer,Lever Shaft1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Lubricating Oil Pump
YM***50Nut1
YM***00Valve,Relief1
YM***02Bolt Plated3
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Starter Motor
YM***50Stopper Ass'Y1
YM***20Pinion, Assembly1
YM***52Bolt Plated2
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine : Suction Manifold - Air Cleaner
YM***90Gasket,(Not Shown)1
YM***02Bolt Plated6
YM***02Screw2
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Engine Related Parts And Electrical System
Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Air Suction - Muffler
3F***50Support1
3F***01Pipe, Suction1
3F***02Sleeve1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Battery
50***68Bracket1
50***05Gasket1
50***06Gasket1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Box Line) : Unit_02_of_02
3F***20Support1
3F***69Support1
3F***84Support1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Box Line) : Unit_01_of_02
3F***20Support1
3F***69Support1
3F***84Support1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)
80***64Screw2
80***08Bolt (Only With Cabin)4
80***05Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Front Line)
80***64Screw2
80***66Bolt2
80***84Screw1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Rotary Beam Line) (Cabin)
80***86Washer1
80***12Screw3
80***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Electrical System (Rotary Beam Line) (Canopy)
80***86Washer1
80***12Screw3
80***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
3F***62Damper4
3F***50Support, Front, L.H1
3F***51Support, Front, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Fuel Piping
3F***23Spring1
3F***13Plate3
3F***15Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Fuel Tank
39***42Pin2
3F***57Plug1
3F***51Tank1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Instrument Panel
3F***05Plate, Ignition Panel1
3F***67Rest, Arm2
3F***79Cover, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Power Take Off
3F***53Joint, Assembly1
3F***50Flywheel Housing1
80***08Bolt (Only With Cabin)8
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Radiator
3F***59Protection1
80***23Screw3
(8***2)Radiator, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Radiator (Mounting Parts)
3F***02Sheet1
3F***03Sheet1
3F***04Sheet1
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Komatsu : Pc45r-8(S/N F20001-Up) : Engine Related Parts And Electrical System : Reserve Tank And Piping
3F***51Tank1
3F***05Support1
3F***03Support1
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Guard And Operator'S Cab
Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Battery Hood
3F***00Spring1
3F***12Rubber2
3F***52Pin1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (1/7)
3F***57Operator'S Cab, Assembly1
80***06Bolt4
80***09Screw2
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (2/7)
3F***58Conveyor1
3F***62Striker1
80***84Screw12
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (3/7)
80***63Bolt12
80***84Screw2
80***86Washer5
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (4/7)
80***64Screw10
80***56Screw2
80***06Self-Lockig Nut4
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (5/7)
80***84Screw4
80***08Bolt (Only With Cabin)2
80***92Screw3
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (6/7)
80***56Screw6
80***05Spring Washer6
81***63Window, Upper, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (7/7)
80***57Screw3
80***65Screw4
80***66Self Taping Screw3
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Cabin (Mounting Parts)
80***57Bolt8
80***66Bolt2
80***02Spring Washer10
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Canopy
3F***50Canopy1
80***10Bolt (Canopy)4
80***86Bolt4
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Electrical System (Operator'S Cab)
81***95Grommet1
81***78Cab Wiring, Assembly1
81***79Wiring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Engine Hood (1/2)
3F***00Spring1
3F***52Striker1
3F***51Hood, Fixed1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Engine Hood (2/2)
3F***60Lock, Assembly1
3F***02Catch1
3F***52Hinge2
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Floor Mat (For Cabin)
Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Floor Mat (For Canopy)
Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Front Guard (Canopy)
3F***56Protection, Front1
80***34Bolt4
80***06Nut2
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Heating System
3F***05Protection1
3F***54Conveyor1
3F***05Hose2
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Left Side Cover
3F***62Hood1
3F***65Hood, Front, L.H1
3F***90Gasket1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Operator'S Seat (For Cabin)
39***69Washer1
3F***62Hinge1
3F***81Cover1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Operator'S Seat (For Canopy)
39***69Washer1
3F***62Hinge1
3F***13Cover1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Platform (For Cabin)
39***93Washer4
3F***75Platform1
3F***08Damper8
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Platform (For Camopy)
39***93Washer4
3F***31Sheet1
3F***75Platform1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Right Side Cover
3F***63Hood1
3F***64Hood, Front, R.H1
3F***90Gasket1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Top Guard (Cabin)
30***16Rubber4
30***17Spacer4
3F***59Protection, Top1
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Komatsu : Pc45r-8(S/N F20001-Up) : Guard And Operator'S Cab : Windscreen Washer
80***28Screw2
81***09Tank, Assembly1
81***92Motor, Hydrostatic Pump1
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Mark Plate
Komatsu : Pc45r-8(S/N F20001-Up) : Mark Plate : Accessories (Tbg Version)
20***60Support (Only For Tbg)1
3F***00Plug (Only For Tbg)1
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Komatsu : Pc45r-8(S/N F20001-Up) : Mark Plate : Mark Plate (Cabin)
3F***42Plate, Name1
3F***24Antislip1
80***27Rivet4
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Komatsu : Pc45r-8(S/N F20001-Up) : Mark Plate : Mark Plate (Canopy)
3F***42Plate, Name1
3F***24Antislip1
80***27Rivet4
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Komatsu : Pc45r-8(S/N F20001-Up) : Mark Plate : Tools
82***35Grease Pump1
82***43Filter Cartridge Wrench1
82***49Cartridge, Grease1
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Swing Circle And Swing Machinery
Komatsu : Pc45r-8(S/N F20001-Up) : Swing Circle And Swing Machinery : Swing Circle
80***78Bolt48
80***33Pin2
80***45Swing Circle1
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Under Carriage
Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Carrier Roller
3F***51Track Roller, Assembly2
82***07Plug1
82***08Ring, Snap1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Hydraulic Piping (Travel Motor Line)
Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Idler (For Rubber Shoe) (1/2) : Unit_02_of_02
3F***51Protection1
3F***54Idler, Assembly2
3F***01Support2
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Idler (For Rubber Shoe) (1/2) : Unit_01_of_02
3F***51Protection1
3F***01Support2
3F***05Idler1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Idler (For Steel Shoe) (1/2) : Unit_02_of_02
3F***51Protection1
3F***55Idler, Assembly2
3F***01Support2
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Idler (For Steel Shoe) (1/2) : Unit_01_of_02
3F***51Protection1
3F***01Support2
3F***05Idler1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Recoil Spring (For Rubber Shoe) (2/2) : Unit_02_of_02
3F***51Valve1
3F***53Cylinder1
3F***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Recoil Spring (For Rubber Shoe) (2/2) : Unit_01_of_02
3F***51Valve1
3F***52Cylinder1
3F***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Recoil Spring (For Steel Shoe) (2/2) : Unit_01_of_02
3F***51Valve1
3F***52Cylinder1
3F***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Recoil Spring (For Steel Shoe) (2/2) : Unit_02_of_02
3F***51Valve1
3F***53Cylinder1
3F***08Nut1
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Rubber Shoe
Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Sprocket
3F***01Sprocket2
80***61Bolt18
80***62Screw18
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Track Frame
3F***62Frame, Track1
80***19Bolt2
80***05Washer2
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Track Frame Cover
3F***41Cover1
3F***63Cover2
80***10Bolt (Canopy)4
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Track Guard
3F***00Protection, L.H2
3F***01Protection, R.H2
3F***02Protection, L.H2
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Track Roller
3F***50Track Roller, Assembly10
80***85Bolt20
80***05Washer20
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Komatsu : Pc45r-8(S/N F20001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=400)
3F***54Track Shoe, Assembly2
3F***55Track Link, Assembly1
3F***01Link, Track, L.H38
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Work Equipment
Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Arm
3F***04Plate2
3F***07Pin1
3F***53Arm1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Arm Cylinder
3F***22Bushing1
3F***64Arm Cylinder, Assembly1
3F***65Cylinder1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Blade
3F***04Plate4
3F***00Pin2
3F***06Protection1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Blade Cylinder
39***06Bushing2
3F***50Cylinder, Assembly1
3F***51Cylinder1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom
20***80Hose-Clamp2
20***10Clamp1
39***14Clamp1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom Cylinder : Unit_02_of_02
3F***64Cylinder1
3F***65Piston Rod1
3F***70Boom Cylinder, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom Cylinder : Unit_01_of_02
3F***63Boom Cylinder, Assembly1
3F***64Cylinder1
3F***65Piston Rod1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom Cylinder Cover
3F***10Slide Block2
3F***11Collar4
3F***51Protection1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom Swing Cylinder
39***06Bushing1
3F***10Piston1
3F***12Bushing1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Boom Swing Cylinder (Mounting Parts)
3F***04Plate2
3F***04Pin1
3F***09Spacer1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Bucket
3F***61Bucket L=600 mm1
3F***62Bucket L=300 mm1
3F***63Bucket L=400 mm1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Bucket Cylinder : Unit_02_of_02
39***05Bushing1
3F***18Bushing1
3F***04Piston1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Bucket Cylinder : Unit_01_of_02
39***05Bushing1
3F***22Bushing1
3F***04Piston1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Bucket Link
3F***00Lever2
3F***01Lever, L.H1
3F***02Lever, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Bucket Pin
3F***52Pin2
3K***05Shim, 1.000 mm2
3K***04O-Ring2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Hydraulic Piping (Blade Line) (Lower)
39***23Hose1
39***24Hose1
39***34Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Hydraulic Piping (For Attachment) (1/3)
30***59Elbow1
39***79Hose1
39***70Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Hydraulic Piping (For Attachment) (2/3)
39***15Hose1
39***01Hose1
3F***93Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Hydraulic Piping (For Attachment) (3/3)
20***53Body (For Hand Hammer)1
20***62Plug (For Hand Hammer)1
20***64Plug (For Hammer On Plate And On Excavator)1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Long Arm
3F***04Plate2
3F***07Pin1
3F***14Bushing2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment : Swing Bracket
3F***04Plate1
3F***05Plate1
3F***00Shim, 1.000 mm1
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Work Equipment Control System
Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (1/17)
3F***01Control Valve1
89***18Spring1
89***19Spring2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (10/17)
89***27O-Ring1
89***58Plug1
89***80O-Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (11/17)
89***27O-Ring1
89***54O-Ring1
89***90O-Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (12/17)
80***38Bolt5
80***00Washer (For Homologation Road)5
89***44O-Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (13/17)
89***78O-Ring1
89***80Ring, Wear1
89***35O-Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (14/17)
89***78O-Ring1
89***39O-Ring1
89***80Ring, Wear1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (15/17)
Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (16/17)
89***71O-Ring2
89***72O-Ring1
89***05O-Ring2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (17/17)
89***79O-Ring2
89***80O-Ring1
89***59Valve, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (2/17)
80***50Bolt4
89***41O-Ring1
89***72O-Ring9
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (3/17)
Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (4/17)
89***69O-Ring1
89***73Cover, Assembly1
89***74Cover1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (5/17)
89***74O-Ring1
89***22Cover, Assembly1
(3***1)Control Valve1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (6/17)
89***22Spring2
89***55Gasket8
89***78Screw5
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (7/17)
Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (8/17)
89***70O-Ring1
89***74O-Ring1
89***05Retainer1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Control Valve (9/17)
89***37Plug4
89***39O-Ring5
89***05O-Ring12
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Final Drive
84***92Final Drive, Assembly2
84***71Centering Ring1
84***98Plug2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line)
30***59Elbow1
39***26Hose1
39***27Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Blade Line) (Upper)
39***18Hose1
39***22Hose1
3F***83Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line)
39***21Hose2
39***14Hose1
39***15Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Swing Cylinder Line)
39***27Hose1
39***28Hose1
3F***52Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Swing Line)
39***11Hose2
3F***83Union1
3F***90Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line)
39***20Hose2
39***10Hose2
3F***93Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket) (For Long Arm)
39***28Hose2
39***10Hose2
3F***93Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Delivery Line)
30***59Elbow2
39***18Hose1
3F***01Union1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Drain)
39***56Hose1
39***57Hose1
39***58Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Load Sensing)
30***71Plug1
39***20Hose1
3F***74Union2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Oil Cooler And Return Line)
30***59Elbow1
30***60Union1
39***10Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line)
20***43Union2
39***13Union1
39***24Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Suction Line)
3F***54Flange1
3F***00Sleeve1
80***11Screw4
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Upper)
39***01Hose1
39***04Hose1
39***05Hose1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping L.H. (Servocontrol Line)
39***04Union1
39***05Union1
39***18Hose2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Piping R.H. (Servocontrol Line)
39***04Union1
39***05Union1
39***17Hose2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (1/6)
3F***52Hydraulic Pump, Assembly1
89***54Pin1
89***74O-Ring4
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (2/6)
89***98Ring, Snap1
89***39O-Ring1
89***47O-Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (3/6)
(8***1)Main Pump, Assembly1
(3***2)Hydraulic Pump, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (4/6)
89***80O-Ring1
89***72Ls Valve, Assembly1
(8***1)Main Pump, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (5/6)
(8***9)Gear Pump, Assembly1
(3***2)Hydraulic Pump, Assembly1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Pump (6/6)
89***81O-Ring1
89***54O-Ring1
89***70O-Ring2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Hydraulic Tank
20***59Indicator Oil Level1
3F***52Plug1
3F***15Cover1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Pcc Valve (Work Equipment Control)
89***41O-Ring1
89***13Shim, 0.300 mm4
89***17Piston4
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve (Attachment)
89***83Ppc Valve1
89***12Body Valve1
89***13Shim, 0.300 mm2
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve (Work Equipment Control)
3F***56Ppc Valve2
89***41O-Ring1
89***13Shim, 0.300 mm4
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve, L.H. : Unit_01_of_02
80***02Spring Washer1
89***06Nut2
89***02Bolt1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve, L.H. : Unit_02_of_02
80***02Spring Washer1
89***06Nut2
89***02Bolt1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve, R.H. : Unit_01_of_02
89***06Nut2
89***02Bolt1
89***56Ppc Valve, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Ppc Valve, R.H. : Unit_02_of_02
89***06Nut2
89***02Bolt1
89***56Ppc Valve, R.H1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Swing Motor (1/2)
84***58Bearing1
84***98Plug1
84***99Washer1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Swing Motor (2/2)
84***41Kit, Cylinder Head1
84***42Kit, Plug1
84***44Kit, Suction Valve1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Swivel Joint : Unit_02_of_02
20***04Plug1
20***57Shaft1
20***58Rotor1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Swivel Joint : Unit_01_of_02
3F***53Swivel Joint, Assembly1
80***47O-Ring1
85***69Rotor1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Swivel Joint (Mounting Parts)
3F***52Plate1
80***34Bolt2
80***35Bolt4
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Travel Motor (1/2)
84***17Kit, Swash Plate1
84***18Kit, Shaft1
84***19Kit, Snap Ring1
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Komatsu : Pc45r-8(S/N F20001-Up) : Work Equipment Control System : Travel Motor (2/2)
84***11Braking Valve Kit1
84***12Plunger Kit1
84***142nd Speed Shifting Kit1
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PC45R-8(S/N F20001-Up) serial number reference

The PIN plate is typically riveted to the right-hand side of the cab on the lower frame, often behind the front idler or beneath the operator window. To read the prefix, locate the first three characters of the serial number sequence on the plate.

PrefixIdentifies
F20PC45R-8 (S/N F20001-Up)

Frequently asked questions

What engine is installed in the PC45R-8?

The machine is powered by a Komatsu 4D84E-3FA naturally aspirated diesel engine, providing 38 HP (28 kW) net power.

What is the operating weight of this model?

The standard operating weight for the PC45R-8 is approximately 4750 kg (10472 lbs).

What machine replaced the PC45R-8?

The documentation identifies the PC45MR-5 as a subsequent model in the Komatsu mini excavator lineup.

What PC45R-8(S/N F20001-Up) owners discuss

What engine is installed in the Komatsu PC45R-8 (S/N F20001-Up)?
The PC45R-8 (S/N F20001-Up) utilizes a 4D84E-3D engine. This engine provides 44.1 hp gross power and 3/8.8 hp net power.
What are the common hydraulic performance symptoms reported for this model?
Operators report two primary patterns: a lack of breakout force across all functions accompanied by engine RPM drops, or specific single-function weakness (such as a weak boom) which may indicate a valve issue rather than cylinder failure.
What should be checked if the excavator tracks are loosening frequently?
Inspect for internal seal leakage within the adjuster; grease can fill the bottom of the barrel without visible external leaks. Additionally, check for excessive wear or stretching in rubber tracks.
How does temperature affect hydraulic performance on this machine?
A common diagnostic pattern is hydraulics working normally when cold but becoming weak once the oil reaches operating temperature, which often indicates internal leakage in the pump, control valve, or motors due to decreased oil viscosity.
What are known electrical and sensor-related issues for Komatsu excavators?
Due to heavy reliance on electronic control systems, faulty sensors or unstable power supplies can cause intermittent starting, dashboard failures, or random machine shutdowns. Multiple fault codes may also stem from battery or ground connection issues.
What is the critical checklist when buying a used Komatsu PC45R-8 (S/N F20001-Up)?
Verify the exact serial number to confirm specifications. Inspect for boom cylinder weakness, check for hydraulic oil contamination, evaluate track tensioner integrity, and examine the engine for power loss under load or overheating. Always verify all measurements and model numbers before purchasing parts.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

Serial-range & configuration variants

This page covers the Komatsu PC45R-8(S/N F20001-Up). Related factory variants of the same model family:

PC45R-8(S/N F21251-Up)PC45R-8(S/N 5001-UP)PC45R-8(S/N DELUXE F20666-Up)

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