Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC20R-8(S/N F30791-Up)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC20R-8 is a mini excavator in the 2.5-ton class, powered by a naturally aspirated 3D78AE-3FA engine producing 17 kW (23 hp). Operating weight is 2,535 kg (5,589 lbs). Production years are not documented for this exact serial range. The PC20R-8 succeeded the PC20-7 and was succeeded by the PC20MRx. Configurations offered include standard and deluxe variants.
The PC20R-8 introduced a compact radius and improved controllability for tight spaces. It matters in the used market due to its simple, naturally aspirated engine and reliable hydraulic system. The F30791-Up serial range has specific service manual requirements distinct from earlier builds.
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 PC20R-8(S/N F30791-Up) specifications
Engine
| Model | 3D78AE-3FA |
| Gross Power | 26.7 hp (19.9 kW) |
| Net Power | 23 hp (17.4 kW) |
| Displacement | 73.5 cu in (1204 cc) |
| Cylinders | 3 |
| Emissions Tier | Stage 2 |
Weights
| Operating Weight | 5589 lbs (2535 kg) |
| Ground Pressure | 1.6 psi (11.0 kPa) |
Dimensions
| Transport Length | 4.25 m (13.94 ft) |
| Transport Width | 1.37 m (4.5 ft) |
| Transport Height | 2.45 m (8.03 ft) |
| Tail Swing Radius | 1.24 m (4.07 ft) |
| Track Shoe Width | 250 mm (9.85 in) |
| Ground Clearance | not documented for this exact serial range — verify with your dealer |
| Undercarriage Length | 4.4 ft (1.34 m) |
Performance
| Max Dig Depth | 2.35 m (7.71 ft) |
| Max Reach at Ground | 4.25 m (13.94 ft) |
| Max Dump Height | 2.76 m (9.07 ft) |
| Max Cutting Height | 4.03 m (13.22 ft) |
| Swing Speed | 9 rpm |
| Travel Speed | 4.3 km/h (2.68 mph) |
| Gradeability | not documented for this exact serial range — verify with your dealer |
| Drawbar Pull | not documented for this exact serial range — verify with your dealer |
Forces
| Bucket Digging Force | not documented for this exact serial range — verify with your dealer |
| Stick/Arm Digging Force | not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Tank | 35.2 L (9.3 gal) |
| Hydraulic System/Tank | 7.7 gal (29.1 L) |
| Engine Oil | 1.0 gal (3.8 L) |
| Cooling System | 1.1 gal (4.2 L) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC20R-8(S/N F30791-Up) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 3.8 l (1.0 gal) | Komatsu EO or API CD SAE 10W, SAE 20W-20, or SAE 30 depending on ambient temperature |
| Cooling system | 4.2 l (1.1 gal) | Komatsu Super Coolant AF-NAC |
| Fuel tank | 35.2 l (9.3 gal) | Standard diesel fuel |
| Hydraulic system total | 29.1 l (7.7 gal) | Komatsu TO or equivalent hydraulic oil |
| Hydraulic tank | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Final drive (each) | Not documented for this exact serial range — verify with your dealer | Komatsu AXO or equivalent gear oil |
| Swing drive | Not documented for this exact serial range — verify with your dealer | Komatsu AXO or equivalent gear oil |
| Pilot/other circuits | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Grease | N/A | General lithium-based grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC20R-8(S/N F30791-Up) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the PC20R-8(S/N F30791-Up) beyond the schedule
Predictive Maintenance & Fluid Analysis
Use Komatsu KOWA fluid analysis at 500–hour and 1,000-hour intervals to monitor engine wear metals and hydraulic oil cleanliness. Check coolant SCA levels at 500 hours to prevent scaling. Monitor hydraulic pump flow capacity of 57 LPM (15.8 GPM) for efficiency loss. Track fuel consumption against the 35.2 L (9.3 gal) tank capacity for performance baselines.
Corrective & Common Repairs
Address hydraulic drift in boom, arm, or bucket cylinders by checking seal integrity. Replace the 3D78AE-3FA engine fuel injection pump if timing is off. Inspect the center swivel joint for hydraulic leaks. Check travel motor pressure if deviation occurs. Replace the hydraulic return filter at 500 hours to protect the control valve.
Overhaul & Rebuild Points
Rebuild travel motors at 10,000 hours or when pressure drops below spec. Inspect the swing circle and machinery for wear at 2,000 hours. Check track roller and carrier roller play. Replace the injection pump nozzles if exhaust smoke is abnormal. Inspect the turbocharger for shaft play at 2,000 hours.
Seasonal & Environment Servicing
Check track tension weekly to prevent derailment on rough terrain. Inspect undercarriage wear on the 38-shoe side tracks. Drain the fuel separator daily in wet conditions. Check the cooling system for debris in the radiator fins. Ensure the 12 V electrical system is secure for cold starts.
PC20R-8(S/N F30791-Up) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM171051-92760 | Wrench,Fuel Filter? Water Separator | Fuel system service | Check fitment → |
| 3F05B2627 | Plate, Safety Fuel Filter | Fuel system service | Check fitment → |
| YM119813-12600 | Air Filter, Assembly | Air intake service | Check fitment → |
| 3F05B2628 | Plate, Safety, Engine Air Filter | Air intake service | Check fitment → |
| 3F10B2605 | Plate, Safety, Hydraulic Oil Filter | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC20R-8(S/N F30791-Up) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine Ne and Bkup speed sensor failure | Faulty crankshaft speed sensor, broken wiring harness, or corroded connector at the sensor pin | Inspect the sensor wiring and connector for damage; replace the speed sensor if voltage is abnormal |
| CA111 | ECM critical internal failure | Internal fault within the Electronic Control Module or loss of controller power | Check ECM power connections, fuses, and ground wires; replace or reprogram the ECM if necessary |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the fuel rail pressure sensor, actual overpressure condition, or sensor wiring issue | Diagnose the fuel rail pressure sensor and check pump lines for blockages or leaks |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose charging connections | Replace the battery or alternator; check the voltage regulator and charging belt |
| DW43KB | Travel speed solenoid coil short circuit | Electrical short in the travel speed control solenoid valve circuit | Inspect the solenoid valve wiring for chafing; replace the solenoid valve if the short persists |
| DHS3MA | Arm retraction PPC pressure sensor abnormality | Faulty pressure sensor, short circuit in the sensor wiring, or hydraulic line blockage | Check the pressure sensor voltage and circuitry; inspect hydraulic lines for restrictions |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake pressure sensor or restricted airflow causing high pressure | Verify the intake pressure sensor operation and inspect the wiring harness for shorts |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and inspect the engine load cycle for anomalies |
| CA153 | Intake air temperature sensor feedback voltage too high | Faulty intake air temperature (IAT) sensor or sensor wiring issue | Test the IAT sensor and replace it if the voltage reading is out of specification |
| DGH2KB | Hydraulic oil temperature sensor short circuit | Shorted hydraulic oil temperature sensor or contaminated oil affecting sensor reading | Replace the temperature sensor and check the hydraulic oil condition and cooler fan |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC20R-8(S/N F30791-Up) attachments & work tools
Buckets
Reference capacity is 0.1 cubic meters (0.1 cubic yards), with a maximum capacity of 0.2 cubic meters (0.2 cubic yards) and a minimum of 0.1 cubic meters (0.1 cubic yards). The standard bucket width is 0.45 meters (17.7 inches). Pin-on mounting is standard for this class.
Hydraulic hammers
The machine operates at a relief valve pressure of 210 bar (3046 psi) with a pump flow of 57 liters per minute (15.8 gallons per minute). This hydraulic output supports medium-class breakers in the 150 to 250 kg (330 to 550 lb) weight range, typically requiring a 2-way attachment selector valve.
Quick couplers
The PC20R-8 (S/N F30791-Up) utilizes a standard pin-on boom configuration compatible with mini-excavator quick couplers. Factory documentation lists an 'Attachments, Options' section for optional quick-attach systems, but specific coupler dimensions are not documented for this exact serial range.
Thumbs/grapples
The machine supports 1-way and 2-way attachment controls via a selector valve. Mechanical angle blades and power tilt mechanisms are listed as optional specifications in the shop manual, indicating compatibility with mechanical thumbs or grapple kits designed for the 2.5-ton class.
Rippers
Rippers are not listed as a standard or optional attachment in the available operation and maintenance manuals for the PC20R-8. The machine's compact dimensions and 2535 kg (5589 lb) operating weight generally preclude the use of heavy ripper attachments.
Hydraulic-kit notes
The standard hydraulic system relief pressure is 210 bar (3046 psi). The pump delivers 57 liters per minute (15.8 gallons per minute) at 2600 rpm. High-flow or medium-pressure circuits are not specified for this model; attachments must operate within these standard flow and pressure limits.
All PC20R-8(S/N F30791-Up) assemblies by section
Every catalogued assembly group for the Komatsu PC20R-8(S/N F30791-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 : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Attachment Control Pedal : Unit_02_of_02
| 3F***54 | Support | 1 |
| 3F***55 | Pedal | 1 |
| 80***08 | Bolt (Only With Cabin) | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Attachment Control Pedal : Unit_01_of_02
| 3F***51 | Pedal | 1 |
| 3F***52 | Support | 1 |
| 80***08 | Bolt (Only With Cabin) | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Blade Control Lever
| 30***44 | Washer | 1 |
| 3F***52 | Link | 1 |
| 3F***53 | Cable | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Boom Swing Control Pedal
| 3F***53 | Fork | 1 |
| 3F***60 | Link | 1 |
| 3F***50 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Counter Weight
| 3F***03 | Ballast | 1 |
| 80***16 | Bolt | 2 |
| 80***05 | Washer | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Fuel Control Lever
| 31***36 | Accelerator Lever | 1 |
| 39***39 | Pin | 1 |
| 3F***51 | Cable | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : L.H. Servocontrol : Unit_01_of_03
| 39***06 | Hose | 2 |
| 39***07 | Hose | 1 |
| 39***08 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : L.H. Servocontrol : Unit_03_of_03
| 39***06 | Hose | 2 |
| 39***07 | Hose | 1 |
| 39***14 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : L.H. Servocontrol : Unit_02_of_03
| 39***06 | Hose | 2 |
| 39***07 | Hose | 1 |
| 39***08 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Lateral Protection
| 39***09 | Spacer | 4 |
| 3F***05 | Protection, L.H | 1 |
| 3F***07 | Protection, R.H | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Lubricating Oil System
| 20***09 | Union | 4 |
| 3F***00 | Hose | 2 |
| 50***01 | Sleeve | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Ppc Valve Support, L.H.
| 30***67 | Bushing | 1 |
| 39***33 | Pin | 1 |
| 3F***73 | Pin | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Ppc Valve Support, R.H.
| 3F***86 | Support, R.H | 1 |
| 3F***91 | Support, R.H | 1 |
| 80***86 | Washer | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : R.H. Servocontrol : Unit_01_of_02
| 39***04 | Hose | 2 |
| 39***05 | Hose | 2 |
| 3F***64 | Elbow | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : R.H. Servocontrol : Unit_02_of_02
| 39***04 | Hose | 2 |
| 39***05 | Hose | 2 |
| 3F***64 | Elbow | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Revolving Frame
| 3F***56 | Frame, Revolving | 1 |
| 3F***73 | Bushing | 2 |
| 3F***74 | Spacer | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Servocontrol Lock System
| 39***37 | Pin | 1 |
| 39***09 | Spacer | 3 |
| 3F***50 | Cylinder, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Control System And Revolving Frame : Travel Control Lever
| 3F***56 | Support | 1 |
| 3F***57 | Pin | 1 |
| 3F***60 | Pedal, L.H | 1 |
Engine
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Camshaft And Driving Gear
| YM***02 | Nut | 1 |
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***00 | Rod,Push | 6 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Cooling Water System
| YM***02 | Bolt Plated | 2 |
| YM***20 | O-Ring,(Not Shown) | 1 |
| YM***20 | Plug,Drain(Without Oil Cooler Type) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Crankshaft And Piston
| YM***00 | Gear,Crank | 1 |
| YM***50 | Ring Set (+0.25 mm) | 3 |
| YM***00 | Connecting Rod, Assembly | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Cylinder Block
| YM***30 | Thrust Metal Ass'Y (Std) | 2 |
| YM***60 | Cylinder Block, Assembly | 1 |
| YM***00 | Plug | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Cylinder Head
| 87***21 | Motor, Assembly | 1 |
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Exhaust Manifold
| YM***02 | Stud | 2 |
| YM***80 | Collar | 1 |
| YM***02 | Screw | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Flywheel - Lubricating Oil Sump
| YM***50 | Oil Seal Case, Assembly | 1 |
| YM***80 | Seal? Rear | 1 |
| YM***02 | Screw | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Fuel Injection Line
| YM***70 | Union | 1 |
| YM***20 | Retainer, Pipe | 1 |
| YM***20 | Spring | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Fuel Injection Pump
| YM***70 | Retainer, Spring | 3 |
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Fuel Line
| YM***40 | Lever | 1 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Cartridge | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Gasket Set - Tool (Optional)
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***60 | Wrench,Fuel Filter? Water Separator | 1 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Gear Housing
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***02 | Bolt Plated | 2 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Generator
| YM***00 | Relay Ass'Y,Safety | 1 |
| YM***02 | Nut | 1 |
| YM***50 | Brush Ass'Y | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Governor
| YM***01 | Weight Assembly., Governor | 1 |
| YM***40 | Lever,Control | 1 |
| YM***30 | Spacer,Lever Shaft | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Lubricating Oil Pump
| YM***50 | Nut | 1 |
| YM***00 | Valve,Relief | 1 |
| YM***02 | Bolt Plated | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Starter Motor
| YM***20 | Holder Ass'Y,Brush | 1 |
| YM***50 | Stopper Ass'Y | 1 |
| YM***20 | Pinion, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine : Suction Manifold - Air Cleaner
| YM***90 | Gasket,(Not Shown) | 1 |
| YM***02 | Screw | 2 |
| YM***10 | Case, Assembly | 1 |
Engine Related Parts And Electrical System
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Air Suction - Muffler
| 3F***54 | Support | 1 |
| 3F***05 | Pipe | 1 |
| 3F***06 | Clamp | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Battery
| 50***68 | Bracket | 1 |
| 50***05 | Gasket | 1 |
| 50***06 | Gasket | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Electrical System (Box Line)
| 3F***20 | Support | 1 |
| 3F***69 | Support | 1 |
| 3F***84 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)
| 80***08 | Bolt (Only With Cabin) | 3 |
| 80***33 | Bolt | 1 |
| 80***05 | Nut | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Electrical System (Front Line)
| 80***64 | Screw | 1 |
| 80***66 | Bolt | 3 |
| 80***08 | Bolt (Only With Cabin) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Electrical System (Rotary Beam Line) (Cabin)
| 80***86 | Washer | 1 |
| 80***12 | Screw | 3 |
| 80***08 | Nut | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Electrical System (Rotary Beam Line) (Canopy)
| 80***86 | Washer | 1 |
| 80***12 | Screw | 3 |
| 80***08 | Nut | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 3F***56 | Damper | 4 |
| 3F***59 | Support | 1 |
| 3F***60 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Fuel Piping
| 3F***06 | Protection | 1 |
| 3F***11 | Hose | 2 |
| 3F***23 | Spring | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Fuel Tank
| 3F***53 | Filler | 1 |
| 3F***54 | Tank | 1 |
| 3F***55 | Float | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 3F***05 | Plate, Ignition Panel | 1 |
| 3F***67 | Rest, Arm | 2 |
| 3F***79 | Cover, R.H | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Power Take Off
| 3F***52 | Joint, Assembly | 1 |
| 3F***54 | Cover | 1 |
| 3F***03 | Spacer | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Radiator
| (3***3) | Radiator, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Radiator (Mounting Parts)
| 21***60 | Sleeve | 1 |
| 3F***63 | Radiator, Assembly | 1 |
| 3F***07 | Bracket | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Engine Related Parts And Electrical System : Reserve Tank And Piping
| 3F***51 | Tank | 1 |
| 3F***03 | Support | 1 |
| 3F***05 | Hose | 1 |
Guard And Operator'S Cab
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Battery Cover
| 3F***70 | Hood, Battery | 1 |
| 3F***00 | Spring | 1 |
| 3F***12 | Rubber | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (1/7)
| 3F***57 | Operator'S Cab, Assembly | 1 |
| 80***06 | Bolt | 4 |
| 80***09 | Screw | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (2/7)
| 3F***58 | Conveyor | 1 |
| 3F***62 | Striker | 1 |
| 80***84 | Screw | 12 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (3/7)
| 80***63 | Bolt | 12 |
| 80***84 | Screw | 2 |
| 80***86 | Washer | 5 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (4/7)
| 80***64 | Screw | 10 |
| 80***56 | Screw | 2 |
| 80***06 | Self-Lockig Nut | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (5/7)
| 80***84 | Screw | 4 |
| 80***08 | Bolt (Only With Cabin) | 2 |
| 80***92 | Screw | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (6/7)
| 22***20 | Glass-Window, Run Rear | 1 |
| 22***30 | Glass-Window, Run, Front | 1 |
| 80***56 | Screw | 6 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (7/7)
| 80***57 | Screw | 3 |
| 80***65 | Screw | 4 |
| 80***66 | Self Taping Screw | 3 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Cabin (Mounting Parts)
| 80***56 | Bolt | 8 |
| 80***66 | Bolt | 2 |
| 80***02 | Spring Washer | 10 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Canopy
| 3F***60 | Protection | 1 |
| 3F***50 | Canopy | 1 |
| 80***10 | Bolt (Canopy) | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Electrical System (Operator'S Cab)
| 81***95 | Grommet | 1 |
| 81***78 | Cab Wiring, Assembly | 1 |
| 81***79 | Wiring | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Engine Hood (1/2)
| 3F***56 | Hood, Fixed | 1 |
| 3F***08 | Plate | 1 |
| 3F***11 | Sheet | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Engine Hood (2/2)
| 3F***60 | Lock, Assembly | 1 |
| 3F***02 | Catch | 1 |
| 3F***53 | Hinge | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Floor Mat (For Cabin)
| 3F***01 | Mat | 1 |
| 3F***03 | Mat | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Floor Mat (For Canopy)
| 3F***00 | Mat | 1 |
| 3F***02 | Mat | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Front Guard (Canopy)
| 3F***56 | Protection, Front | 1 |
| 80***34 | Bolt | 4 |
| 80***06 | Nut | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Heating System
| 30***50 | Heater | 1 |
| 39***37 | Union | 1 |
| 3F***53 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Left Side Cover
| 3F***54 | Hood | 1 |
| 3F***27 | Hood, L.H | 1 |
| 3F***32 | Sheet | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Operator'S Seat
| 3F***62 | Hinge | 1 |
| 3F***87 | Support | 1 |
| 3F***13 | Cover | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Operator'S Seat (For Cabin)
| 3F***62 | Hinge | 1 |
| 3F***87 | Support | 1 |
| 3F***13 | Cover | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Platform (For Cabin)
| 39***93 | Washer | 4 |
| 3F***75 | Platform | 1 |
| 3F***92 | Platform | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Platform (For Canopy)
| 39***93 | Washer | 4 |
| 3F***31 | Sheet | 1 |
| 3F***75 | Platform | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Right Side Cover
| 3F***55 | Hood | 1 |
| 3F***28 | Hood, R.H | 1 |
| 3F***29 | Sheet | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Guard And Operator'S Cab : Windscreen Washer
| 80***28 | Screw | 2 |
| 81***09 | Tank, Assembly | 1 |
| 81***92 | Motor, Hydrostatic Pump | 1 |
Mark Plate
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Accessories (Tbg Version)
| 20***60 | Support (Only For Tbg) | 1 |
| 3F***00 | Spacer (Only For Tbg) | 1 |
| 3F***00 | Plug (Only For Tbg) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Mark Plate (Cabin) : Unit_02_of_02
| 31***16 | Mark Plate, Utility | 1 |
| 33***57 | Mark Plate, Komatsu | 3 |
| 3F***07 | Plate, Safety, Do Not Open Engine Hood | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Mark Plate (Cabin) : Unit_01_of_02
| 3F***38 | Antislip | 2 |
| 81***55 | Kit, Mark Plate | 1 |
| 81***65 | Mark Plate Kit (Pc20) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Mark Plate (Canopy) : Unit_01_of_02
| 3F***38 | Antislip | 2 |
| 81***55 | Kit, Mark Plate | 1 |
| 81***65 | Mark Plate Kit (Pc20) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Mark Plate (Canopy) : Unit_02_of_02
| 31***16 | Mark Plate, Utility | 1 |
| 33***57 | Mark Plate, Komatsu | 3 |
| 3F***07 | Plate, Safety, Do Not Open Engine Hood | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Mark Plate : Tools
| 82***35 | Grease Pump | 1 |
| 82***43 | Filter Cartridge Wrench | 1 |
| 82***49 | Cartridge, Grease | 1 |
Swing Circle And Swing Machinery
Komatsu : Pc20r-8(S/N F30791-Up) : Swing Circle And Swing Machinery : Swing Circle
| 80***75 | Bolt | 16 |
| 80***77 | Bolt | 16 |
| 80***20 | Pin | 2 |
Under Carriage
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Hydraulic Piping (Travel Motor Line)
| 39***13 | Hose | 4 |
| 39***14 | Hose | 4 |
| 3F***53 | Union | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Idler (For Rubber Shoe) (1/2)
| 3F***52 | Idler, L.H., Assembly | 1 |
| 3F***53 | Idler, R.H., Assembly | 1 |
| 3F***06 | Idler | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Idler (For Rubber Shoe) (2/2)
| 20***55 | Cylinder | 1 |
| 3F***50 | Piston Rod | 1 |
| 3F***51 | Valve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Idler (For Steel Shoe) (1/2)
| 3F***54 | Idler, L.H., Assembly | 1 |
| 3F***55 | Idler, R.H., Assembly | 1 |
| 3F***06 | Idler | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Idler (For Steel Shoe) (2/2)
| 20***55 | Cylinder | 1 |
| 3F***50 | Piston Rod | 1 |
| 3F***51 | Valve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Rubber Shoe
| 3F***51 | Rubber Shoe, Assembly | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Sprocket
| 20***50 | Sprocket | 2 |
| 80***46 | Screw | 16 |
| 80***54 | Screw | 18 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Track Frame
| 3F***54 | Frame, Track | 1 |
| 50***04 | Slide Block | 4 |
| 80***34 | Bolt | 8 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Track Frame Cover
| 3F***69 | Cover, Rear | 1 |
| 3F***53 | Cover, R.H | 1 |
| 3F***54 | Cover, L.H | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Track Guard
| 3F***00 | Protection, L.H | 2 |
| 3F***01 | Protection, R.H | 2 |
| 80***60 | Bolt | 12 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Track Roller
| 3F***51 | Track Roller, Assembly | 6 |
| 3F***00 | Roller | 1 |
| 50***80 | Bushing | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Under Carriage : Track Shoe (For Steel Shoe)
| 3F***50 | Track Shoe, Assembly | 2 |
| 3F***51 | Shoe, Assembly | 37 |
| 3F***52 | Shoe, Assembly | 1 |
Work Equipment
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Arm
| 3F***04 | Plate | 1 |
| 3F***51 | Arm | 1 |
| 3F***00 | Pin | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Arm Cylinder
| 3F***22 | Bushing | 2 |
| 3F***56 | Cylinder | 1 |
| 3F***58 | Arm Cylinder, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Blade
| 20***76 | Pin | 4 |
| 3F***22 | Bushing | 2 |
| 3F***51 | Blade, Dozer | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Blade Cylinder
| 3F***22 | Bushing | 2 |
| 3F***54 | Blade Cylinder, Assembly | 1 |
| 3F***55 | Cylinder | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom
| 20***80 | Hose-Clamp | 2 |
| 39***47 | Clamp | 1 |
| 3F***55 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom Cylinder (For Cabin)
| 3F***62 | Piston Rod | 1 |
| 3F***68 | Boom Cylinder, Assembly | 1 |
| 3F***69 | Cylinder | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom Cylinder (For Canopy)
| 3F***60 | Boom Cylinder, Assembly | 1 |
| 3F***61 | Cylinder | 1 |
| 3F***62 | Piston Rod | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom Cylinder Cover
| 3F***16 | Slide Block | 2 |
| 3F***24 | Protection | 1 |
| 80***08 | Bolt (Only With Cabin) | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom Swing Cylinder
| 3F***56 | Cylinder | 1 |
| 3F***58 | Boom Swing Cylinder | 1 |
| 3F***59 | Piston Rod | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Boom Swing Cylinder (Mounting Parts)
| 3F***04 | Plate | 1 |
| 3F***10 | Shim | 4 |
| 3F***06 | Pin | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Bucket
| 3F***55 | Bucket L=450 mm | 1 |
| 3F***56 | Bucket L=430 mm | 1 |
| 3F***57 | Bucket L=250 mm | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Bucket Cylinder
| 3F***01 | Piston | 1 |
| 3F***06 | Cylinder Head | 1 |
| 3F***55 | Bucket Cylinder, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Bucket Link
| 20***84 | Link | 2 |
| 3F***50 | Pin | 2 |
| 50***84 | Plate | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Bucket Pin
| 3F***51 | Pin | 2 |
| 50***42 | Shim | 2 |
| 80***04 | Pin, Safety | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Ditch-Cleaning Bucket
| 20***80 | Ditch-Cleaning Bucket | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Attachment Line) (1/3) : Unit_01_of_02
| 20***80 | Hose-Clamp | 1 |
| 39***22 | Hose | 1 |
| 39***50 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Attachment Line) (1/3) : Unit_02_of_02
| 20***80 | Hose-Clamp | 1 |
| 39***22 | Hose | 1 |
| 39***50 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Attachment Line) (2/3)
| 39***77 | Hose | 1 |
| 39***08 | Hose | 1 |
| 3F***57 | Pipe | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Attachment Line) (3/3)
| 20***52 | Fitting (For Hand Hammer) | 1 |
| 20***53 | Body (For Hand Hammer) | 1 |
| 20***62 | Plug (For Hand Hammer) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Blade Line) (Lower)
| 39***19 | Hose | 1 |
| 39***20 | Hose | 1 |
| 50***06 | Elbow | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Blade Line) (Safety Valve)
| 3F***03 | Spacer | 2 |
| 3F***57 | Pipe | 1 |
| 50***44 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (1/2)
| 39***53 | Hose | 2 |
| 3F***60 | Pipe | 1 |
| 3F***61 | Pipe | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (2/2)
| 20***30 | Plug | 2 |
| 20***52 | Fitting (For Hand Hammer) | 1 |
| 20***53 | Body (For Hand Hammer) | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Long Arm
| 3F***04 | Plate | 1 |
| 3F***00 | Pin | 1 |
| 3F***51 | Long Arm | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment : Swing Bracket
| 3F***04 | Plate | 1 |
| 3F***01 | Pin | 1 |
| 3F***07 | Bracket, Assembly | 1 |
Work Equipment Control System
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (1/12)
| 3F***59 | Control Valve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (10/12)
| 89***79 | Suction Valve, Assembly | 9 |
| 89***04 | O-Ring | 1 |
| 89***38 | Holder, Valve W/Case | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (11/12)
| 89***71 | O-Ring | 2 |
| 89***73 | Ring, Wear | 1 |
| 89***05 | O-Ring | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (12/12)
| 89***79 | Suction Valve, Assembly | 1 |
| 89***04 | O-Ring | 1 |
| (3***9) | Control Valve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (2/12)
| 89***62 | Cover, Assembly | 1 |
| 89***63 | Valve | 2 |
| 89***64 | Screw | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (3/12)
| 89***65 | O-Ring | 9 |
| 89***66 | O-Ring | 8 |
| 89***67 | O-Ring | 9 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (4/12)
| 89***69 | O-Ring | 1 |
| 89***73 | Cover, Assembly | 3 |
| 89***74 | Cover | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (5/12)
| 89***22 | Spring | 2 |
| 89***55 | Gasket | 8 |
| 89***39 | O-Ring | 6 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (6/12)
| 89***37 | Plug | 3 |
| 89***05 | O-Ring | 14 |
| 89***10 | Valve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (7/12)
| 89***24 | Spring | 1 |
| 89***58 | Plug | 1 |
| 89***80 | O-Ring | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (8/12)
| 89***78 | O-Ring | 1 |
| 89***80 | Ring, Wear | 1 |
| 89***40 | Safety Valve, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Control Valve (9/12)
| 89***78 | O-Ring | 1 |
| 89***39 | Relief Valve, Assembly | 1 |
| 89***37 | O-Ring | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Final Drive
| 84***83 | Final Drive, Assembly | 2 |
| 84***16 | Ring, Snap | 3 |
| 84***19 | Bearing | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Pipimg (Boom Swing Line)
| 39***18 | Hose | 2 |
| 3F***69 | Union | 2 |
| 50***05 | Elbow | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line With Adjustable Orifice Valve)(Opt
| 39***23 | Hose | 1 |
| 39***24 | Hose | 1 |
| 39***04 | Hose | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line)
| 39***23 | Hose | 1 |
| 39***24 | Hose | 1 |
| 39***04 | Hose | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Blade Line) (Upper)
| 39***01 | Hose | 1 |
| 39***02 | Hose | 1 |
| 3F***69 | Union | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (For Cabin)
| 39***31 | Hose | 2 |
| 39***05 | Hose | 2 |
| 3F***65 | Union | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (For Canopy)
| 39***31 | Hose | 2 |
| 39***05 | Hose | 2 |
| 3F***65 | Union | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Safety Valve) (1/3)
| 3F***72 | Pipe | 1 |
| 3F***58 | Elbow (Only For Tbg) | 1 |
| 50***10 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Safety Valve) (2/3)
| 39***40 | Hose | 2 |
| 3F***06 | Protection | 1 |
| 3F***51 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Safety Valve)(Tbg Version)(3/3)
| 39***36 | Hose | 1 |
| 3F***54 | Support | 1 |
| 3F***01 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Boom Swing Cylinder Line)
| 39***16 | Hose | 1 |
| 39***17 | Hose | 1 |
| 3F***65 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line)
| 39***27 | Hose | 2 |
| 39***04 | Hose | 2 |
| 3F***65 | Union | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Bucket) (For Long Arm)
| 39***29 | Hose | 2 |
| 39***04 | Hose | 2 |
| 3F***65 | Union | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Delivery Line)
| 30***59 | Elbow | 1 |
| 30***59 | Plug | 1 |
| 39***81 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Drain)
| 39***73 | Hose | 1 |
| 39***15 | Hose | 1 |
| 39***82 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Oil Cooler And Return Line)
| 39***06 | Sleeve | 1 |
| 39***11 | Sleeve | 1 |
| 39***19 | Sleeve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line)
| 20***43 | Union | 2 |
| 39***79 | Hose | 1 |
| 39***85 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Suction Line)
| 3F***55 | Flange | 1 |
| 3F***54 | Pipe | 1 |
| 3F***01 | Sleeve | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motorline) (Upper)
| 39***09 | Hose | 1 |
| 39***03 | Hose | 1 |
| 39***11 | Hose | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping L.H. (Servocontrol Line) : Unit_01_of_02
| 39***04 | Union | 1 |
| 39***05 | Union | 1 |
| 39***82 | Hose | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping L.H. (Servocontrol Line) : Unit_02_of_02
| 39***82 | Hose | 2 |
| 3F***14 | Protection | 2 |
| 80***24 | Screw | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping R.H. (Servocontrol Line) : Unit_02_of_02
| 39***71 | Hose | 1 |
| 39***47 | Hose | 1 |
| 50***12 | Connector | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Piping R.H. (Servocontrol Line) : Unit_01_of_02
| 39***04 | Union | 1 |
| 39***05 | Union | 1 |
| 39***71 | Hose | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Pump (1/2)
| 3F***53 | Hydraulic Pump | 1 |
| 84***12 | Shaft | 1 |
| 84***13 | Rotary Group, Assembly | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Pump (2/2)
| 84***25 | Washer | 1 |
| 84***27 | Seat, Nozzle Spring | 1 |
| 84***28 | Seat, Nozzle Spring | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Hydraulic Tank
| 20***59 | Indicator Oil Level | 1 |
| 3F***52 | Plug | 1 |
| 3F***53 | Flange | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve (Attachment) : Unit_02_of_02
| 80***50 | Screw | 1 |
| 84***72 | Ppc Valve | 1 |
| 84***58 | Support | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve (Attachment) : Unit_01_of_02
| 89***83 | Ppc Valve | 1 |
| 89***12 | Body Valve | 1 |
| 89***13 | Shim, 0.300 mm | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve (Work Equipment)
| 3F***56 | Ppc Valve | 2 |
| 89***41 | O-Ring | 1 |
| 89***13 | Shim, 0.300 mm | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve, L.H. : Unit_01_of_02
| 80***02 | Spring Washer | 1 |
| 89***06 | Nut | 2 |
| 89***02 | Bolt | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve, L.H. : Unit_02_of_02
| 21***60 | Ppc Valve, L.H., Assembly | 1 |
| 3F***54 | Union | 1 |
| 50***44 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve, R.H. : Unit_01_of_02
| 89***06 | Nut | 2 |
| 89***02 | Bolt | 1 |
| 89***56 | Ppc Valve, R.H | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Ppc Valve, R.H. : Unit_02_of_02
| 21***70 | Ppc Valve, R.H., Assembly | 1 |
| 3F***54 | Union | 1 |
| 50***44 | Union | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Swing Motor
| 84***03 | Swing Motor A | 1 |
| 84***03 | Cartridge | 2 |
| 84***04 | Valve Seat | 2 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Swivel Joint
| 20***03 | Pin | 1 |
| 20***05 | Gasket | 1 |
| 20***06 | Ring, Wear | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Swivel Joint (Mounting Parts)
| 3F***00 | Plate | 1 |
| 80***08 | Bolt (Only With Cabin) | 2 |
| 80***43 | Bolt | 4 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Travel Motor (1/2)
| 84***91 | Travel Motor, Assembly | 1 |
| 84***00 | Cylinder Block Kit | 1 |
| 84***01 | Kit, Swash Plate | 1 |
Komatsu : Pc20r-8(S/N F30791-Up) : Work Equipment Control System : Travel Motor (2/2)
| 84***94 | Kit, Cylinder Head, Assembly | 1 |
| 84***95 | Braking Valve Kit | 1 |
| 84***96 | Plunger Kit | 1 |
PC20R-8(S/N F30791-Up) serial number reference
The PIN plate is riveted to the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The prefix is the first character of the 17-character ISO PIN, indicating the plant or region of manufacture.
| Prefix | Identifies | Notes |
|---|---|---|
| F | Standard | Serial range F30791-Up. Confirmed in Komatsu PC20R-8 parts catalog variants. Verify with dealer for specific configuration details. |
Frequently asked questions
What engine does the PC20R-8 use?
The PC20R-8 uses a Komatsu 3D78AE-3FA engine.
What is the operating weight?
The operating weight is 2,535 kg (5,589 lbs).
What replaced the PC20R-8?
The PC20R-8 was succeeded by the PC20MRx.
What PC20R-8(S/N F30791-Up) owners discuss
What engine is installed in the Komatsu PC20R-8 with serial number F30791 and up?
The PC20R-8 (S/N F30791-Up) is equipped with the 3D74E-3 engine. This differs from earlier PC20R-8 units (S/N 10001-Up) which may share documentation with the PC25R-8 and PC27R-8 series that use the 3D82AE-3 engine. Consult the specific shop manual for the 74 Series Engine for detailed specifications of the 3D74E-3 unit.
What are the typical hydraulic system behaviors and maintenance requirements for this model?
The hydraulic circuit capacity is 48 liters. Operators should check and add hydraulic fluid when the oil temperature is between 45-55°C. If all hydraulic functions become slow, check the hydraulic oil level, correct oil specification, hydraulic filters, engine RPM under load, and oil temperature. Weak performance when hot often indicates internal leakage in the pump, main control valve, or cylinders due to decreased viscosity. For boom drift testing, position the arm vertical with the bucket on the ground, stop the engine, and release residual pressures before inspection.
What are common undercarriage and track tension issues for this excavator?
If track-shoe tensions are too low, inject grease through the grease nipple using a grease pump. If difficulties are encountered while injecting grease, move the machine slowly backwards and forwards over a short distance to relieve pressure. A machine that pulls to one side while traveling should have its track tension, mud/debris packing, roller condition, and track-chain condition checked before diagnosing travel motor or final drive issues. Test the symptom in both forward and reverse to isolate the side.
What electrical or sensor issues are commonly associated with the PC20R-8 series?
Common electrical faults include ECM critical internal failures, engine speed sensor failures (Ne and Bkup), and sensor power supply voltage issues (High/Low). Specific codes may indicate failures in the throttle sensor, coolant temperature sensor, barometric pressure sensor, or water-in-fuel sensor. The fuse box is located on the R.H. cover side, accessible by loosening screw (5) and removing the general fuse (6). Multiple fault codes often point to battery state, grounds, or connector integrity.
What should be checked when buying a used PC20R-8 (S/N F30791-Up)?
Verify the engine is the 3D74E-3, not the 3D82AE-3 found in earlier serial ranges or PC25R-8/PC27R-8 models. Check the hydraulic oil condition and temperature during operation (45-55°C for filling). Inspect the track tension and undercarriage wear, ensuring the tensioner operates smoothly. Test all hydraulic functions for drift and performance when hot. Check the fuse box on the R.H. cover for corrosion or loose connections. Review error codes on the monitor for persistent electrical or sensor faults.
How does the engine performance typically behave under heavy hydraulic load?
If engine RPM drops heavily when hydraulics are used, the hydraulic system may be placing excessive load on the engine or the engine may be unable to produce expected power. If engine speed remains normal but hydraulic movements become weak, the hydraulic system is the likely cause. Check air filters, fuel filters, fuel tank venting, and charge-air hoses for restrictions. Engine overheating during heavy excavation often indicates packed material between heat exchangers (radiator, hydraulic oil cooler, charge-air cooler).
What is the safety-critical procedure for releasing hydraulic pressure before maintenance?
Before disconnecting tubes or removing oil filler caps, drain plugs, or hydraulic pressure measuring plugs, loosen them slowly to prevent oil from spurting out. Ensure all pressure is completely removed from the water, oil, or air circuits. For boom tests, position the machine with the arm vertical and bucket resting on the ground, stop the engine, and release residual hydraulic pressures. Wait for oil and water to cool before working on circuits to avoid burns. Have your dealer verify pressure release procedures and safety lock operation.
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 PC20R-8(S/N F30791-Up). Related factory variants of the same model family:
PC20R-8(S/N 10001-UP)PC20R-8(S/N F30001-Up)
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