Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC45-1(S/N F1001-Up)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC45-1 (S/N F1001-Up) is a mini excavator designed for compact earthmoving and utility applications. This machine features an operating weight of approximately 4,795 kg (10,571 lb) with a 400 mm track width. Produced between 1995 and 1998, it belongs to the early generation of Komatsu's small-scale hydraulic excavators, offering versatile digging capabilities with bucket capacities ranging from 0.07 m³ to 0.175 m³.
Across different series, Komatsu transitioned from the standard PC45-1 architecture to more advanced MR and MRX configurations, integrating improved emissions technology and refined hydraulic controls. Today, the PC45-1 remains a significant presence in the used equipment market due to its robust mechanical simplicity and high parts availability. Its durable chassis and reliable engine components make it a preferred choice for secondary market buyers seeking cost-effective solutions for landscaping and small-scale construction.
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 PC45-1(S/N F1001-Up) specifications
Engine
| Model | 4D88E-6 |
| Net Power | 28.5 kW (38.2 hp) |
| Displacement | 2.2 L (134 cu in) |
| Cylinders | 4 |
Weights
| Operating Weight | 4,795 kg (10,571.2 lb) |
| Ground Pressure | 24.8 kPa (3.6 psi) |
Dimensions
| Transport Length | 5,330 mm (17.5 ft) |
| Transport Width | 1,960 mm (6.4 ft) |
| Transport Height | 2,550 mm (8.4 ft) |
| Tail Swing Radius | 1,060 mm (3.5 ft) |
| Track Shoe Width | 400 mm (15.7 in) |
| Ground Clearance | 3 mm (0 ft) |
| Undercarriage Length | 2,000 mm (6.6 ft) |
Performance
| Max Dig Depth | 3,670 mm (12 ft) |
| Max Vertical Wall Digging Depth | 3,060 mm (10 ft) |
| Max Reach at Ground | 5,885 mm (19.3 ft) |
| Max Cutting Height | 5,730 mm (18.8 ft) |
| Max Loading Height | 4,060 mm (13.3 ft) |
| Swing Speed | 9 rpm |
| Travel Speed | 4.6 km/h (2.9 mph) |
| Drawbar Pull | 42 kN (9,440 lb) |
Forces
| Hydraulic System Relief Valve Pressure | 26,475.8 kPa (3, 840 psi) |
Service capacities (summary)
| Fuel Tank | 65 L (17.2 gal) |
| Hydraulic System/Tank | 20 L (5.3 gal) |
| Engine Oil | 7.5 L (2 gal) |
| Cooling System | 8.5 L (2.2 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC45-1(S/N F1001-Up) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 8.1 L (2.0 US gal) | Komatsu engine oil; 15W-40 recommended for all-season use per Komatsu/Kubota standards for similar class engines |
| Cooling system | 8.9 L (2.4 US gal) | Komatsu Super-coolant AF-NAC |
| Fuel tank | 65 L (17.2 US gal) | Diesel fuel |
| Hydraulic system total AND hydraulic tank | 55 L (20 US gal) total; varies by configuration/series | Komatsu hydraulic oil |
| Final drive (each) | 0.7 L (0.2 US gal) | Komatsu gear oil |
| Swing drive | Not documented for this exact serial range — verify with your dealer | Komatsu swing machinery case oil |
| Grease (spec only) | Not specified | Komatsu grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC45-1(S/N F1001-Up) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 100 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the PC45-1(S/N F1001-Up) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA (Komatsu Oil Wear Analysis) at major service intervals to monitor engine oil, hydraulic fluid, and coolant health. Analyze wear metals like iron or copper and check for contaminants such as silicon or sodium. Regular sampling of hydraulic oil helps identify particle counts and oxidation levels before pump failure occurs. Monitoring battery electrolyte levels and alternator function ensures the electrical system remains stable during heavy-duty cycles.
Corrective & Common Repairs
Address common wear items such as bucket teeth (vertical pin type) and track tension adjustments for steel or rubber shoes. Monitor hydraulic cylinder pins, including boom and arm cylinder foot pins, for excessive play. If hydraulic performance drops, inspect the hydraulic pump and check for leaks in the O-ring face seal fittings. Ensure the radiator/oil cooler fins are clear of debris to prevent overheating during intensive operation.
Overhaul & Rebuild Points
Major rebuilds should focus on the hydraulic system, including replacing the hydraulic pump and cleaning the hydraulic tank strainer. Inspect the swing machinery case and final drive components for structural integrity. During engine overhauls, verify valve clearance adjustments and inspect the turbocharger if equipped. Comprehensive evaluation of the boom and arm welds is essential to maintain structural safety during high-stress excavation tasks.
Seasonal & Environment Servicing
In cold weather, implement specific precautions for low temperatures, including checking coolant levels and preparing cab heaters. During summer or dusty conditions, increase the frequency of air cleaner element inspections and radiator fin cleaning. For machines operating in wet environments, regularly drain water and sediment from the fuel tank and inspect all electrical wiring and connectors for moisture-induced corrosion or shorts.
PC45-1(S/N F1001-Up) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YMR000145 | Air Filter, Assembly | Air intake service | Check fitment → |
| YMR000114 | Filter, Assembly | Scheduled service item | Check fitment → |
| YMR000115 | Element, Assembly | Scheduled service item | Check fitment → |
| YMR000926 | Wrench, Filter | Scheduled service item | Check fitment → |
| YMR000933 | Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC45-1(S/N F1001-Up) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure or engine management system malfunction | Engine controller (ECM) power failure, wiring harness issues, or ground wire problems | Inspect ECM power connections, fuses, or ground wires |
| E11 | Engine control failure with reduced output power | Engine protection mode triggered by high coolant temperature, low oil pressure, or clogged air filter | Check coolant temperature, oil pressure, and air filter status |
| E14 | Feedback system abnormality | Failure in the machine's feedback monitoring circuits | Inspect feedback system components and wiring |
| E15 | Engine sensor malfunction | Faulty temperature, fuel pressure, or oil pressure sensors | Test engine sensors for proper operation and voltage |
| E02 | PC-EPC system error | Fault in the Pilot Control - Electronic Pressure Control system | Inspect EPC solenoid valves and related hydraulic circuits |
| E03 | Parking brake or rotary parking brake system error | Malfunction in the rotary parking brake circuit or solenoid | Inspect parking brake solenoid valve and associated circuitry |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC45-1(S/N F1001-Up) attachments & work tools
Buckets
Available in digging and ditching configurations. Capacity ranges from 0.07 m³ (0.09 yd³) to 0.175 m³ (0.23 yd³). Attachments can be pin-on or utilize a coupler.
Hydraulic hammers
The machine supports hydraulic breaker attachments. Maintenance intervals for the hydraulic breaker require specific service schedule adjustments.
Quick couplers
Coupler attachments are available for this model to facilitate rapid work tool changes.
Thumbs/grapples
Thumb attachments are compatible with the PC45-1. Manual and hydraulic style thumbs are available, with a 762 mm (30 inch) requirement based on operating weight.
Rippers
Ripper attachments are identified as compatible work tools for this machine class.
Hydraulic-kit notes
Hydraulic kits are available for the PC45-1. Manual selector valves may allow switching between one-way (breaker) and two-way (thumb) flow on compatible configurations.
All PC45-1(S/N F1001-Up) assemblies by section
Every catalogued assembly group for the Komatsu PC45-1(S/N F1001-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 : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Attachment Pedal Control
| 30***68 | Cover | 1 |
| 33***52 | Wiring Harness | 1 |
| 33***54 | Switch | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Blade Control Lever
| 30***44 | Washer | 1 |
| 3F***00 | Fork | 1 |
| 3F***53 | Cable, Assembly., R.H | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Boom Swing Control Pedal
| 30***68 | Cover | 1 |
| 3F***50 | Fork | 1 |
| 3F***50 | Support | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Counter Weight
| 3F***51 | Cover | 1 |
| 3F***61 | Cover | 1 |
| 3F***62 | Cover | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Fuel Control Lever
| 30***61 | Cover | 1 |
| 39***39 | Pin | 1 |
| 3F***50 | Fuel Lever | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : L.H. Lock Lever
| 30***67 | Bushing | 1 |
| 33***52 | Wiring Harness | 1 |
| 33***54 | Switch | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : L.H. Servocontrol (Arm And Swing)
| 39***39 | Hose | 1 |
| 39***50 | Hose | 2 |
| 39***56 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : R.H. Lock Lever (For Canopy)
| 30***67 | Bushing | 1 |
| 33***52 | Wiring Harness | 1 |
| 33***54 | Switch | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : R.H. Lock Support (For Cabin)
| 30***67 | Bushing | 1 |
| 33***52 | Wiring Harness | 1 |
| 33***54 | Switch | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : R.H. Servocontrol (Boom And Bucket)
| 39***49 | Hose | 2 |
| 39***55 | Hose | 2 |
| 50***51 | Union | 8 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Revolving Frame
| 20***09 | Union | 6 |
| 3F***04 | Plate | 1 |
| 3F***28 | Gasket | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Servocontrol Locking System
| 39***37 | Pin | 1 |
| 39***77 | Shim | 3 |
| 3F***50 | Cylinder, Assembly | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Servocontrol Rotation Axle
| 3F***57 | Shaft | 1 |
| 3F***05 | Support | 2 |
| 80***56 | Bolt | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Control System And Revolving Frame : Travel Control Lever
| 3F***50 | Fork | 2 |
| 3F***50 | Lever, L.H | 1 |
| 3F***51 | Lever, R.H | 1 |
Engine
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Camshaft And Driving Gear
| YM***85 | Bushing | 1 |
| YM***07 | Screw | 2 |
| YM***59 | Bearing, Thrust | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Cooling Water System
| YM***08 | Screw | 1 |
| YM***71 | Clamp | 2 |
| YM***91 | Pulley | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Crankshaft And Piston
| YM***99 | Assembly, Piston (+0.50 mm) | 4 |
| YM***97 | Parallel Pin | 1 |
| YM***03 | Bushing (Repair Part) | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Cylinder Block
| YM***78 | Cylinder Block, Assembly | 1 |
| YM***39 | Plug | 1 |
| YM***78 | Plug | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Cylinder Head
| 87***12 | Engine, Assembly | 1 |
| YM***08 | Screw | 7 |
| YM***65 | Seal, Valve Exhaust | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Engine Stop Device
| YM***48 | Tie-Rod | 1 |
| YM***19 | Clamp | 1 |
| YM***28 | Breather, Assembly | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Flywheel - Lubricating Oil Sump
| 3F***00 | Plug (Only For Tbg) | 1 |
| YM***97 | Parallel Pin | 4 |
| YM***07 | Screw | 24 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Fuel Injection Line
| YM***39 | Pipe | 1 |
| YM***13 | Ring, Nut | 4 |
| YM***15 | Seat, Nozzle Spring | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Fuel Injection Pump
| YM***29 | Plug | 1 |
| YM***16 | Spring Washer | 2 |
| YM***37 | Locking, Rack | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Fuel Line
| YM***75 | Gasket | 2 |
| YM***61 | Pipe | 3 |
| YM***00 | Plug | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Gasket Set (Optional) - Tool
| YM***65 | Seal, Valve Exhaust | 4 |
| YM***26 | Wrench, Filter | 1 |
| YM***82 | O-Ring | 3 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Gear Housing
| YM***96 | Pipe L=18 | 2 |
| YM***70 | Flange, Gear Housing | 1 |
| YM***07 | Screw | 6 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Generator
| YM***39 | Nut Assembly., Pulley | 1 |
| YM***34 | Diode Assembly | 1 |
| YM***25 | Nut | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Governor
| YM***26 | Spring | 1 |
| YM***58 | Nut | 1 |
| YM***59 | Screw | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Lubricating Oil System
| YM***33 | Filter | 1 |
| YM***74 | Gasket | 2 |
| YM***73 | Oil Pressure Transmitter | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Starting Motor
| YM***05 | Bearing (1) | 1 |
| YM***30 | Shaft | 1 |
| YM***31 | Kit, Stop Set, Pinion | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine : Suction Manifold - Air Cleaner
| YM***16 | Plug | 1 |
| YM***25 | Pan Assembly., Dust | 1 |
| YM***03 | Washer | 1 |
Engine Related Parts And Electrical System
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Air Filter - Muffler
| 3F***51 | Support | 1 |
| 3F***52 | Cover | 1 |
| 3F***53 | Support | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Battery
| 50***68 | Bracket | 1 |
| 50***05 | Gasket | 1 |
| 50***06 | Gasket | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Electrical System (Box Line)
| 3F***19 | Support | 1 |
| 3F***20 | Support | 1 |
| 80***62 | Bolt | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Electrical System (Front Line)
| 33***27 | Spacer (For Mounting Safety Valves) | 1 |
| 80***66 | Bolt | 2 |
| 80***89 | Bolt (Only With Canopy) | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 3F***50 | Damper | 2 |
| 3F***51 | Damper, Rear | 2 |
| 3F***01 | Spacer | 6 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Fuel Piping
| 3F***00 | Hose | 1 |
| 50***89 | Rubber | 2 |
| 80***08 | Bolt (Only With Cabin) | 3 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Fuel Tank
| 20***57 | Plug, Assembly | 1 |
| 39***06 | Elbow | 1 |
| 39***33 | Union | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 3F***02 | Bracket | 4 |
| 3F***05 | Plate, Ignition Panel | 1 |
| 3F***50 | Cover, R.H | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Power Take Off
| 3F***50 | Joint, Assembly | 1 |
| 3F***51 | Cover | 1 |
| 3F***52 | Cover | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Radiator - Exhanger
| 39***78 | Spacer | 6 |
| 3F***55 | Support | 1 |
| 3F***50 | Radiator, Assembly | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Engine Related Parts And Electrical System : Reserve Tank And Piping
| 20***87 | Support, Tank | 1 |
| 3F***00 | Hose | 1 |
| 80***64 | Screw | 2 |
Guard And Operator'S Cab
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Battery Cover And Tank Cover
| 3F***00 | Spring | 1 |
| 3F***12 | Rubber | 2 |
| 3F***52 | Support | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (1/6)
| 3F***50 | Operator'S Cab, Assembly | 1 |
| 3F***53 | Duct | 1 |
| 3F***54 | Operator'S Cab, Assembly | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (2/6)
| 80***44 | Screw | 4 |
| 80***27 | Screw | 2 |
| 80***08 | Nut (With Stabilizers Only) | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (3/6)
| 31***86 | Handle, External | 1 |
| 80***31 | Screw | 2 |
| 80***28 | Screw | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (4/6)
| 80***64 | Screw | 2 |
| 80***84 | Screw | 2 |
| 80***86 | Washer | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (5/6)
| 80***04 | Ring, Snap | 4 |
| 81***13 | Glass, Rear | 1 |
| 81***14 | Glass, Lateral, L.H | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Cabin (6/6)
| 80***27 | Screw | 4 |
| 80***66 | Self Taping Screw | 6 |
| 80***04 | Self-Locking Nut | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Canopy
| 3F***52 | Canopy | 1 |
| 3F***51 | Handle | 1 |
| 80***10 | Bolt (Canopy) | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Electrical System (Cabin)
| 80***00 | Screw (Only For Germany) | 1 |
| 80***12 | Screw | 3 |
| 80***17 | Screw | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Engine Hood (1/3)
| 3F***54 | Cover | 1 |
| 3F***55 | Cover | 1 |
| 3F***08 | Plate | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Engine Hood (2/3)
| 3F***52 | Hinge | 2 |
| 3F***00 | Spring | 1 |
| 3F***50 | Hood | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Engine Hood (3/3)
| 39***60 | Spring | 1 |
| 3F***54 | Lock, Assembly | 1 |
| 3F***03 | Pin | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Floor Plate (2/2)
| 3F***55 | Cover | 1 |
| 3F***61 | Cover | 1 |
| 3F***63 | Rest Feet | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Floor Plate (For Cabin) (1/2)
| 3F***08 | Damper | 8 |
| 3F***09 | Engine Cover | 1 |
| 3F***15 | Platform | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Floor Plate (For Canopy) (1/2)
| 3F***09 | Engine Cover | 1 |
| 3F***15 | Platform | 1 |
| 3F***27 | Cover | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Front Guard (Canopy)
| 3F***53 | Protection, Front | 1 |
| 80***34 | Bolt | 4 |
| 80***06 | Nut | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Heating System : Unit_02_of_02
| 39***18 | Elbow | 1 |
| 3F***05 | Protection | 2 |
| 3F***52 | Support | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Heating System : Unit_01_of_02
| 30***20 | Support | 1 |
| 39***18 | Elbow | 1 |
| 3F***05 | Protection | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Operator'S Seat
| 39***69 | Washer | 1 |
| 3F***62 | Hinge | 1 |
| 3F***13 | Cover | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Top And Front Guard (Cab)
| 30***16 | Rubber | 6 |
| 30***17 | Spacer | 6 |
| 3F***51 | Protection, Top | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Guard And Operator'S Cab : Washer Glass
| 80***86 | Washer | 2 |
| 80***08 | Spring Washer (For Hydraulic Lock) | 2 |
| 80***01 | Spring Washer (With Stabilizers Only) | 2 |
Mark Plate
Komatsu : Pc45-1(S/N F1001-Up) : Mark Plate : Mark Plate (Cab)
| 30***38 | Plate ?Fai Komatsu? | 1 |
| 3F***01 | Mark Plate Komatsu | 1 |
| 3F***10 | Mark Plate, Safety, Emergency Exit | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Mark Plate : Mark Plate (Canopy)
| 3F***41 | Plate, Mark, Sound Pressure Level Lpa 81 | 1 |
| 3F***42 | Mark Plate, Mark, Sound Power Level ?Lwa 98? | 1 |
| 81***89 | Mark Plate, Sound Pressure Level (Only For Canopy) | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Mark Plate : Tools
| 82***35 | Grease Pump | 1 |
| 82***43 | Filter Cartridge Wrench | 1 |
| 82***49 | Cartridge, Grease | 1 |
Swing Circle And Final Drive
Komatsu : Pc45-1(S/N F1001-Up) : Swing Circle And Final Drive : Swing Circle
| 3F***50 | Swing Circle | 1 |
| 80***79 | Bolt | 40 |
| 80***33 | Pin | 2 |
Under Carriage
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Carrier Roller
| 3F***52 | Track Roller, Assembly | 2 |
| 3F***01 | Shaft | 1 |
| 3F***02 | Spacer | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Front Idler
| 3F***00 | Idler | 2 |
| 3F***01 | Support | 4 |
| 3F***05 | Idler | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Hydraulic Piping (Travel Line)
| 39***20 | Hose | 4 |
| 39***21 | Hose | 2 |
| 39***48 | Hose | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Recoil Spring (For Rubber Shoe)
| 20***55 | Cylinder | 2 |
| 3F***51 | Valve | 2 |
| 3F***50 | Piston Rod | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Recoil Spring (For Steel Shoe)
| 20***55 | Cylinder | 2 |
| 3F***51 | Valve | 2 |
| 3F***50 | Piston Rod | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Sprocket
| 3F***00 | Sprocket | 2 |
| 3F***01 | Sprocket | 2 |
| 80***61 | Bolt | 18 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Frame (For Rubber Shoe)
| 3F***41 | Cover | 1 |
| 3F***43 | Support | 1 |
| 3F***50 | Frame, Track | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Frame (For Steel Shoe)
| 3F***41 | Cover | 1 |
| 3F***43 | Support | 1 |
| 3F***50 | Frame, Track | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Roller
| 3F***50 | Track Roller, Assembly | 10 |
| 3K***00 | Roller | 1 |
| 3K***01 | Shaft | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Rubber Shoe L=400)
| 3F***50 | Rubber Shoe, Assembly | 2 |
| 3F***51 | Rubber Shoe, Assembly | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=400) : Unit_01_of_02
| 3F***50 | Track Shoe, Assembly | 2 |
| 3F***51 | Track Link, Assembly | 1 |
| 3F***00 | Shoe, Assembly | 38 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=400) : Unit_02_of_02
| 3F***54 | Track Shoe, Assembly | 2 |
| 3F***55 | Track Link, Assembly | 1 |
| 3F***01 | Link, Track, L.H | 38 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=450) : Unit_01_of_02
| 3F***51 | Track Link, Assembly | 1 |
| 3F***52 | Track Shoe, Assembly | 2 |
| 3F***01 | Link, Track, L.H | 38 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=450) : Unit_02_of_02
| 3F***55 | Track Link, Assembly | 1 |
| 3F***56 | Track Shoe, Assembly | 2 |
| 3F***01 | Link, Track, L.H | 38 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=550) : Unit_01_of_02
| 3F***51 | Track Link, Assembly | 1 |
| 3F***53 | Track Shoe, Assembly | 2 |
| 3F***01 | Link, Track, L.H | 38 |
Komatsu : Pc45-1(S/N F1001-Up) : Under Carriage : Track Shoe (For Steel Shoe L=550) : Unit_02_of_02
| 3F***55 | Track Link, Assembly | 1 |
| 3F***57 | Track Shoe, Assembly | 2 |
| 3F***01 | Link, Track, L.H | 38 |
Work Equipment
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Arm
| 3F***04 | Plate | 2 |
| 3F***07 | Pin | 1 |
| 3F***50 | Arm | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Arm Cylinder
| 39***05 | Bushing | 2 |
| 3F***50 | Cylinder, Assembly | 1 |
| 3F***51 | Cylinder | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Blade
| 39***79 | Spacer | 2 |
| 3F***04 | Plate | 3 |
| 3F***00 | Pin | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Blade Cylinder
| 39***06 | Bushing | 2 |
| 3F***50 | Cylinder, Assembly | 1 |
| 3F***51 | Cylinder | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Boom
| 3F***03 | Support | 1 |
| 3F***04 | Plate | 2 |
| 3F***10 | Slide Block | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Boom (Tbg)
| 20***60 | Support (Only For Tbg) | 1 |
| 3F***04 | Plate | 2 |
| 3F***10 | Slide Block | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Boom Cylinder
| 3F***50 | Cylinder, Assembly | 1 |
| 3F***51 | Cylinder | 1 |
| 3F***52 | Piston Rod | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Boom Swing Bracket
| 3F***04 | Plate | 2 |
| 3F***05 | Plate | 1 |
| 3F***00 | Shim, 1.000 mm | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Boom Swing Cylinder
| 39***06 | Bushing | 1 |
| 39***03 | Bushing | 1 |
| 3F***10 | Piston | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Bucket
| 3F***52 | Bucket, L=300 mm | 1 |
| 3F***53 | Bucket, L=400 mm | 1 |
| 3F***54 | Bucket, L=500 mm | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Bucket Cylinder
| 39***05 | Bushing | 2 |
| 3F***50 | Cylinder, Assembly | 1 |
| 3F***51 | Cylinder | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Bucket Link
| 3F***00 | Lever | 2 |
| 3F***01 | Lever, L.H | 1 |
| 3F***02 | Lever, R.H | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Hydraulic Piping (Attachment) (1/2)
| 30***09 | Ring | 2 |
| 39***06 | Hose | 1 |
| 39***63 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Hydraulic Piping (Attachment) (2/2)
| 20***90 | Plug | 2 |
| 39***27 | Hose | 2 |
| 3F***00 | Support | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Hydraulic Piping (Blade Line)
| 39***41 | Hose | 1 |
| 39***42 | Hose | 1 |
| 3F***50 | Union | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment : Long Arm
| 39***19 | Hose | 2 |
| 3F***04 | Plate | 2 |
| 3F***07 | Pin | 1 |
Work Equipment Control System
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : 2-Spool Control Valve
| 84***62 | Control Valve, Assembly | 1 |
| 84***68 | Kit, Tie-Rod | 1 |
| 84***69 | Spool Return Unit | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : 7-Spool Control Valve (1/3)
| 84***61 | Control Valve, Assembly | 1 |
| 84***98 | Control Valve, Assembly | 1 |
| 84***67 | Kit, Tie-Rod | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : 7-Spool Control Valve (2/3)
| 84***69 | Spool Return Unit | 2 |
| 84***70 | Spring | 2 |
| 84***73 | Kit, Spool Gasket | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : 7-Spool Control Valve (3/3)
| 84***69 | Spool Return Unit | 2 |
| 84***70 | Spring | 2 |
| 84***71 | Spool Return Unit | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Line)
| 39***18 | Hose | 6 |
| 39***44 | Hose | 2 |
| 39***03 | Clamp | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Blade Line) (Upper)
| 39***43 | Hose | 2 |
| 3F***53 | Union | 2 |
| 50***67 | Union | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line)
| 20***40 | Plug | 1 |
| 39***42 | Hose | 1 |
| 39***43 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Swing Line)
| 39***04 | Hose | 1 |
| 39***05 | Hose | 1 |
| 3F***64 | Collar | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Line)
| 39***19 | Hose | 2 |
| 39***45 | Hose | 2 |
| 39***10 | Clamp | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Delivery Line)
| 39***16 | Hose | 1 |
| 39***27 | Hose | 1 |
| 39***40 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Drain Line)
| 39***09 | Hose | 1 |
| 39***10 | Hose | 1 |
| 3F***58 | Elbow | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Return Line) (1/2)
| 30***06 | Cap Valve | 1 |
| 39***85 | Hose | 1 |
| 39***86 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Return Line) (2/2)
| 39***71 | Hose | 1 |
| 39***11 | Hose | 1 |
| 39***12 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line) (1/2)
| 33***11 | Union | 3 |
| 39***10 | Hose | 1 |
| 39***29 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line) (2/2)
| 39***28 | Hose | 1 |
| 39***30 | Hose | 1 |
| 39***78 | Hose | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line) (L.H.)
| 39***79 | Hose | 1 |
| 39***82 | Hose | 1 |
| 50***44 | Union | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Servocontrol Line) (R.H.)
| 39***47 | Hose | 1 |
| 39***80 | Hose | 1 |
| 50***44 | Union | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Suction Line) : Unit_01_of_02
| 3F***50 | Pipe | 1 |
| 3F***00 | Hose | 1 |
| 3F***51 | Pipe | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Suction Line) : Unit_02_of_02
| 3F***55 | Pipe | 1 |
| 3F***00 | Hose | 1 |
| 3F***53 | Flange | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Swing Motor Line)
| 39***43 | Hose | 2 |
| 3F***00 | Pin | 2 |
| 3F***50 | Union | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Line) (Upper)
| 39***46 | Hose | 2 |
| 39***47 | Hose | 2 |
| 3F***50 | Elbow | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Pump (1/2)
| 80***00 | Bearing | 1 |
| 84***4) | Hydraulic Pump | 1 |
| 84***02 | Bearing | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Pump (1/3)
| 84***81 | Hydraulic Pump | 1 |
| 84***16 | Shaft, Assembly | 1 |
| 84***17 | Bearing | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Pump (2/2)
| 84***04 | O-Ring | 2 |
| 84***07 | O-Ring | 1 |
| 84***08 | O-Ring | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Pump (2/3)
| 84***08 | O-Ring | 2 |
| 84***19 | Bearing | 2 |
| 84***21 | O-Ring | 4 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Pump (3/3)
| 84***12 | O-Ring | 2 |
| 84***13 | Gasket | 2 |
| 84***14 | Gasket | 2 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Hydraulic Tank
| 20***59 | Indicator Oil Level | 1 |
| 3F***52 | Plug | 1 |
| 3F***50 | Hydraulic Tank | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Ppc Valve, L.H.
| 84***73 | Ppc Valve, L.H., Assembly | 1 |
| 84***72 | Kit | 1 |
| 84***24 | Articulation | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Ppc Valve, R.H.
| 84***77 | Ppc Valve, R.H., Assembly | 1 |
| 84***72 | Kit | 1 |
| 84***24 | Articulation | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Swing Machinery
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Swivel Joint
| 20***04 | Plug | 1 |
| 20***24 | Shaft | 1 |
| 20***25 | Rotor | 1 |
Komatsu : Pc45-1(S/N F1001-Up) : Work Equipment Control System : Travel Motor
| 84***86 | Ydraulic Motor | 1 |
| 84***50 | Travel Motor | 1 |
| 84***09 | Plug | 2 |
PC45-1(S/N F1001-Up) serial number reference
The PIN plate is riveted to the right-hand side of the cab on the lower frame, typically behind the front idler or beneath the operator's window. To read the prefix, locate the first three characters of the serial number sequence on the machine plate.
| Prefix | Identifies | Notes |
|---|---|---|
| F | PC45-1 (S/N F1001-Up) | Standard configuration; engine is 4D8 4-3. |
Frequently asked questions
What engine is used in the PC45-1?
The specific engine model for this serial range is a Komatsu diesel engine requiring regular oil and filter changes.
What is the operating weight of the PC45-1?
The machine has an operating weight of approximately 4,795 kg (10,571 lb).
What replaced the PC45-1?
The PC45-1 was part of a lineage that evolved into more advanced configurations like the PC45MR and PC45MRX series.
What PC45-1(S/N F1001-Up) owners discuss
What are common causes for uneven track power or one track failing to drive independently when the machine is warm?
If the issue occurs only after the machine warms up, inspect the travel motor. If the tracks still move but performance is degraded, investigate hydraulic pressure levels. Additionally, check for a rough ride sensation; worn carry rollers are a known cause of vibration on smooth surfaces.
What should be checked if the fast travel foot switch fails to operate or blows fuses?
Verify the electrical continuity of the switch using a multimeter; an open circuit in both on and off positions indicates a faulty switch. If the switch is functional but blowing fuses, inspect for shorts. Note that replacing a blown 20 amp fuse may be necessary if the circuit is compromised.
Why does the track tension loosen significantly shortly after greasing the fittings?
Internal seal failure can cause grease to leak past the piston and fill the bottom of the barrel. In this condition, you may not see external leakage, but the tension will sag. Replace seal kits if this pattern persists; have your dealer verify internal cylinder condition.
What are known issues regarding the instrument panel display on older PC45-1 units?
Early Komatsu LCD panels are susceptible to ultraviolet light damage. This can cause the display to turn a magenta color or become unreadable. If the panel is completely dead, check for blown fuses before inspecting the circuit board for burnt spots or failed LEDs.
What maintenance should be performed during the 250-hour service interval?
Per the operation and maintenance manual, procedures include checking engine valve clearance, cleaning/replacing the air cleaner element, cleaning the cooling system, draining water and sediment from the fuel tank, and cleaning the water separator element.
What is the most critical item to check when purchasing a used Komatsu PC45-1?
Verify the exact serial-prefix specification sheet and the installed attachment package. Variations in boom type (one-piece vs. articulated), track width (e.g., 400 mm), and bucket capacity (ranging from 0.07 m³ to 0.175 m³) can significantly impact machine suitability for specific jobsites.
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 PC45-1(S/N F1001-Up). Related factory variants of the same model family:
PC45-1(S/N 1001-UP)
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