Komatsuhydraulic excavatorlarge (pc300 - )
Komatsu PC300-1(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC300-1 (S/N 10001-UP) is a mid-size hydraulic excavator designed for heavy-duty excavation, demolition, and material handling. This series features a Cummins N855C engine delivering 180 hp (134 kW) and an operating weight of approximately 63,934 lb (29,000 kg). The machine is available in multiple configurations, including various boom and stick options that alter maximum digging depth and cutting height. It serves as a predecessor to later generations like the PC300-2 and PC300-3 series.
Across subsequent generations, Komatsu transitioned from the N855C engine to more modern emissions-compliant powerplants and integrated advanced telematics for remote monitoring. The PC300-1 remains a significant machine in the used market due to its robust Cummins powertrain and high hydraulic flow capacity of 126.9 gpm (477 lpm). Its durability makes it a frequent choice for parts reclamation and secondary applications where mechanical simplicity is valued over complex electronic emissions controls.
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 PC300-1(S/N 10001-UP) specifications
Engine
| Model | Cummins N855C |
| Gross Power | 180 hp |
| Net Power | 180 hp (134 kW) |
| Displacement | 855 cu in (14,010.9 cc) |
| Cylinders | 6 |
Weights
| Operating Weight | 63,934.1 lb (29,000 kg) |
| Ground Pressure | 8.39 psi (57.9 kPa) to 8.4 psi |
Dimensions
| Shipping Length | 37.06 ft (11 m) |
| Shipping Height | 9.8 ft (3 m) |
| Width to Outside of Tracks | 9.85 ft (301.8 cm) |
| Tail Swing Radius | 11.06 ft (338.3 cm) |
| Track Shoe Width | 2rab 24.02 in (61.2 cm) |
| Ground Clearance | 1.65 ft (51.8 cm) |
| Length of Track on Ground | 11.42 ft (350.5 cm) to 138.0 in (350.5 cm) |
| Removal Counterweight Clearance | 3.7 ft (112.8 cm) |
| Height to Top of Cab | 10.01 ft (307.8 cm) |
Performance
| Max Digging Depth | 21.46 ft (655 cm) to 26.65 ft (800 cm), varies by configuration/series |
| Max Vertical Wall Digging Depth | 18.21 ft (557.8 cm) to 24.05 ft (763.4 cm), varies by configuration/series |
| Max Reach Along Ground | 34.19 ft (1042.4 cm) to 38.82 ft (1183.6 cm), varies by configuration/series |
| Max Loading Height | 22.97 ft (701.0 cm) to 24.05 ft (733.1 cm), varies by configuration/series |
| Max Cutting Height | 32.7 ft (996.7 cm) to 34.39 ft (1048.3 cm), varies by configuration/series |
| Swing Speed | 6.5 rpm |
| Max Travel Speed | 1.87 mph (3.1 km) to 1.9 mph (3 kph) |
| Gradeability | 70% |
Forces
| Hydraulic System Relief Valve Pressure | 3698 psi (255 bar) |
| Hydraulic Pump Flow Capacity | 126.9 gpm (477 lpm) to 127 gpm (480 lpm) |
Service capacities (summary)
| Fuel Tank | 116.3 gal (440.2 l) |
| Hydraulic System/Tank | 58.2 gal (220.3 l) |
| Engine Oil | not documented for this exact serial range — verify with your dealer |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC300-1(S/N 10001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | not specified | not/a |
| Cooling system | not specified | not/a |
| Fuel tank | 440.2 L (116.3 US gal) | not/a |
| Hydraulic system total | 220.3 L (58.2 US gal) | not/a |
| Hydraulic tank | not specified | not/a |
| Final drive (each) | not specified | not/a |
| Swing drive | not specified | not/a |
| Grease | not specified | not/a |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC300-1(S/N 10001-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 PC300-1(S/N 10001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize oil wear analysis at every major service interval to monitor engine and hydraulic health. Track wear metals like iron, copper, and lead, alongside contaminants such as silicon or sodium. Regular sampling of hydraulic fluid helps identify particle counts and oxidation levels before pump failure occurs. Integrating these results with onboard monitoring data allows for proactive component replacement rather than reactive repairs.
Corrective & Common Repairs
Monitor hydraulic hoses for cracks and leaks to prevent pressure loss in the 3698 psi (255 bar) system. Frequent inspection of pins, bushings, and attachment points is necessary to address wear in high-stress digging applications. If engine performance drops, check the fuel/water separator for contamination or inspect the turbocharger for signs of fatigue. Address track tension adjustments promptly to prevent uneven undercarriage wear.
Overhaul & Rebuild Points
Plan major overhauls around the 2,000-hour mark, focusing on hydraulic oil changes and coolant flushes. Critical rebuild points include evaluating final drive oil condition and inspecting structural boom/stick welds for fatigue. During long-term engine rebuilds, focus on the Cummins N855C displacement components and valve adjustments. Comprehensive component evaluation should include checking the swing machinery oil and bearing clearances.
Seasonal & Environment Servicing
In dusty environments, prioritize frequent air filter element cleaning and radiator fin cleaning to prevent overheating. During cold weather operation, ensure all hydraulic fluids maintain proper viscosity and check for water in the fuel system to prevent freezing. For long-term storage, perform a full machine inspection after work completion and follow specific protocols for lubrication and moisture protection to prevent corrosion.
PC300-1(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 600-311-8291 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6712-81-8660 | Plate? Caution,Additional Fuel Filter | Fuel system service | Check fitment → |
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 07000-02080 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 6710-11-3381 | Screen,Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC300-1(S/N 10001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E03 | Swing parking brake system error | Discrepancies in the safety lever system or brake connectivity/alignment issues | Inspect the lever's connectivity and alignment immediately |
| E10 | Engine controller power failure or engine control drive system malfunction | Engine stall due to ECM power loss or circuit malfunction | Inspect ECM power connections, fuses, or ground wires |
| E11 | Engine protection mode active | Reduced output power to protect the engine from damage | Check coolant temperature, oil pressure, and air filter status |
| E15 | Engine sensor fault | Malfunction in temperature, fuel pressure, or oil pressure sensors | Verify sensor integrity and inspect electrical interconnections |
| E20 | Hydraulic return filter issue | Filter contamination or restriction | Perform comprehensive filter cleansing or replacement |
| E315 | Battery relay output circuit shorted | Electrical short in the battery relay discharge path | Inspect battery relay and associated wiring harness |
| E316 | Governor motor disorder | Governor motor out of adjustment or mechanical failure | Check governor motor adjustment and circuit continuity |
| E318 | Governor motor short circuit | Electrical short in the governor motor drive circuit | Inspect governor motor wiring and solenoid for shorts |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC300-1(S/N 10001-UP) attachments & work tools
Buckets
Standard capacity includes 1.4 m³ (1.83 yd³) heaped buckets. Available configurations include digging, ditching, and clamshell buckets with capacities up to 2 m³ for dredging applications.
Hydraulic hammers
Compatible breaker classes include 6-inch and 6.5-inch (152 mm to 165 mm) hydraulic hammer models. Available in top, side, or box configurations for demolition and quarrying.
Quick couplers
The machine supports various attachment mounting configurations including standard couplers and pin-on setups.
Thumbs/grapples
Compatible with hydraulic grapples, mechanical grapples, rotating hydraulic graplles, and wood grapples. Mechanical thumbs are also supported for material handling.
Rippers
Standard attachment capability includes rippers for soil and material breaking tasks.
Hydraulic-kit notes
The system utilizes a closed-center load-sensing design with high-pressure fluid. Attachments must be compatible with the machine's hydraulic pump flow capacity of 126.9 gpm (477 lpm).
All PC300-1(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC300-1(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine Related Parts And Electrical System
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Air Cleaner And Connection
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***80 | Bolt, Mount Strainer Flange | 4 |
| 01***25 | Bolt - Rear Guard Mounting | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Battery And Relay Switch
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : By-Pass Filter And Piping
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System
| 01***16 | Bolt (Welded) | 4 |
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine Mount
| 01***70 | Bolt,R.H | 8 |
| 01***85 | Bolt,(For Slag Handling) | 2 |
| 01***45 | Washer,(Without R.O.P.S.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Control Lever And Linkage
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***40 | Bolt | 2 |
| 01***65 | Bolt | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***20 | Bolt,(Large Capacity Type) (Std) | 3 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***25 | Bolt - Rear Guard Mounting | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel (1/2)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 8 |
| 01***12 | Screw | 2 |
| 01***03 | Nut (Welded) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel (2/2)
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***20 | Screw,Rubber | 4 |
| 01***12 | Screw,(Except Japan) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Muffler And Connection
| 01***30 | Bolt,Radio Controlled Slag Handling | 5 |
| 01***16 | Bolt | 2 |
| 01***20 | Capscrew - M12 X 1.75 | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Power Take Off(#10001-10507)
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 16 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Power Take Off(#10508-)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***40 | Bolt,(With Service Valve R.H.) | 16 |
| 01***45 | Bolt, Mounting Bracket To Radiator (Top) | 18 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator And Oil Cooler
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 10 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 15 |
| 01***20 | Bolt,(Used When Towing Winch) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator Piping
| 01***30 | Bolt,Radio Controlled Slag Handling | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***80 | Bolt,(Shim 5 Pieces Over) | 2 |
N-855-1 S/N 162054-Up
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Air Cleaner
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 09***05 | Plate? Caution,(Not Shown) | 1 |
| 09***05 | Plate? Instruction,(Without Weather Cap Type) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Air Compressor
| 02***22 | Bolt | 2 |
| 02***70 | Bolt | 4 |
| 02***32 | Bolt,(With Joy Stick Steering) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Air Compressor And Piping (For Pc300-1)
| 01***20 | Bolt | 1 |
| 01***19 | Washer,(Not Used With Ventilator) | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Air Intake Manifold And Ribbon Heater(#162054-181379)
| 01***29 | Washer,Spring (Cold Weather Spec.) | 9 |
| 01***16 | Washer,Radio Controlled Slag Handling | 9 |
| 02***51 | Bolt (Op) | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Air Intake Manifold And Ribbon Heater(#181380-)
| 01***29 | Washer,Spring (Cold Weather Spec.) | 9 |
| 01***16 | Washer,Radio Controlled Slag Handling | 9 |
| 02***70 | Bolt (Op) | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Alternator
| 60***70 | Alternator A. (25a) | 1 |
| KD***37 | Bearing,Ball? Front | 1 |
| KD***20 | Holder,Brush | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Alternator And Mounting
| 01***60 | Bolt, Trunnion Cap | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Cam Follower And Push Rod
| 02***25 | Bolt | 17 |
| 02***24 | Washer,Radio Controlled Slag Handling | 17 |
| 66***10 | Housing Ass'Y,Cam Follower | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Camshaft
| 02***25 | Key | 1 |
| 66***30 | Washer,Thrust | 1 |
| 66***50 | Plug | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Corrosion Resistor
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
| 02***32 | Bolt,(With Joy Stick Steering) | 4 |
| 07***45 | Hose,Drain | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Crankshaft And Vibration Damper
| 01***30 | Bolt,Radio Controlled Slag Handling | 6 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
| 01***48 | Washer,Spring? Single Flange | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Cylinder Block
| 02***16 | Bolt | 12 |
| 02***25 | Bolt,(Cold Weather Spec.) | 4 |
| 02***16 | Washer,Radio Controlled Slag Handling | 12 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Cylinder Head
| 02***04 | Plug, Pipe | 6 |
| 02***04 | Plug | 4 |
| 02***07 | Plug | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Engine Support
| 61***30 | Washer | 8 |
| 67***10 | Support,Front | 1 |
| 67***20 | Support,Front | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Exhaust Manifold
| 02***38 | Bolt | 8 |
| 02***95 | Bolt | 4 |
| 66***11 | Clamp,Exhaust Manifold | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Fan And Fan Pulley
| 01***30 | Bolt,Radio Controlled Slag Handling | 2 |
| 01***35 | Bolt,(For Pedal Steering) | 2 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Lower) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Flywheel And Flywheel Housing
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Fuel Filter
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
| 02***32 | Bolt,(With Joy Stick Steering) | 4 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Gear Case Cover
| 01***34 | Washer,Spring | 18 |
| 02***25 | Bolt,(Cold Weather Spec.) | 3 |
| 02***64 | Bolt | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Injector
| 67***31 | Plunger Ass'Y | 1 |
| 67***10 | Adapter,Injector | 1 |
| 67***20 | Barrel,Injector | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Kit
| 02***18 | O-Ring,Filter | 1 |
| 02***20 | O-Ring,Barrel | 1 |
| 02***43 | O-Ring,Water Manifold | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Lubricating Oil Bypass Filter
| 02***19 | Bolt | 8 |
| 02***06 | Nut,Radio Controlled Slag Handling | 8 |
| 02***16 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Lubricating Oil Cooler
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***60 | Bolt (M10-1.50x60) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Lubricating Oil Filter
| 01***34 | Washer,Spring | 4 |
| 01***48 | Washer,Spring? Single Flange | 1 |
| 01***26 | Washer | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Lubricating Oil Piping
| 01***16 | Bolt,(For Slag Handling) | 1 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 1 |
| 01***16 | Washer,(For 35a Alternator) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Lubricating Oil Pump
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Muffler
| 61***10 | Gasket,Turbocharger | 1 |
| 67***40 | Gasket,Muffler | 1 |
| 67***10 | Muffler | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Oil Pan
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Piston And Connecting Rod
| 02***13 | Pin,Dowel | 2 |
| 66***30 | Ring,Snap | 2 |
| 67***10 | Pin,Piston | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (1/7)
| 02***04 | Nut | 2 |
| 02***04 | Plug | 4 |
| 02***18 | O-Ring,Filter | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (2/7)
| 01***20 | Washer,Spring | 3 |
| 02***25 | Bolt,Radio Controlled Slag Handling | 2 |
| 02***05 | Nut | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (3/7)
| 01***13 | Washer,Spring | 2 |
| 01***20 | Washer,Spring | 9 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (4/7)
| 01***20 | Washer,Spring | 4 |
| 02***32 | Bolt,(Logging Spec.) | 2 |
| 66***20 | Ring,Snap | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (5/7)
| 02***45 | Bolt | 2 |
| 02***12 | Washer,Spring | 4 |
| 66***30 | Washer,Spring | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (6/7)
| 01***20 | Washer,Spring | 5 |
| 02***32 | Bolt,(Logging Spec.) | 3 |
| 02***38 | Bolt | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump (7/7)
| 01***20 | Washer,Spring | 2 |
| 02***32 | Bolt | 2 |
| 02***64 | Bolt,(For Shipping) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump And Piping(#162054-181379)
| 01***29 | Washer,Spring (Cold Weather Spec.) | 2 |
| 02***25 | Bolt,Radio Controlled Slag Handling | 4 |
| 02***13 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump And Piping(#181380-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Pt Fuel Pump Drive
| 02***25 | Bolt | 5 |
| 02***28 | Washer,Spring | 5 |
| 02***04 | Plug,(For Shipping) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Rear Cover
| 02***16 | Bolt | 4 |
| 02***25 | Bolt | 2 |
| 02***32 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Regulator And Safety Relay
| 08***01 | Dust - Indicator | 1 |
| 60***90 | Signal,Heater | 1 |
| 60***90 | Relay, Ribbon Heaters | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Rocker Arm And Housing
| 66***20 | Shaft Ass'Y,Rocker Arm | 1 |
| 66***20 | Plug | 2 |
| 66***30 | Bushing,Arm | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Rocker Arm Housing Cover
| 02***25 | Bolt,(Cold Weather Spec.) | 6 |
| 02***51 | Bolt (Op) | 9 |
| 02***20 | Washer | 15 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Starting Motor
| 60***24 | Starting Motor A.,(11kw) (Cold Weather Spec.) | 1 |
| KD***00 | Seal Ass'Y,(Not Shown) | 1 |
| KD***82 | Screw,Dish | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Starting Motor And Mounting
| 01***45 | Bolt,(For Slag Handling) | 3 |
| 01***22 | Screw | 2 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Tension Pulley
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***40 | Bolt,(Cold Weather Spec.) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Water Manifold And Thermostat
| 01***29 | Washer,Spring (Cold Weather Spec.) | 6 |
| 01***29 | Washer, Spring | 12 |
| 02***25 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Water Pump
| 01***29 | Washer,Spring (Cold Weather Spec.) | 7 |
| 02***57 | Bolt | 7 |
| 02***04 | Plug,(For Shipping) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : N-855-1 S/N 162054-Up : Water Separator
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***11 | Plug,(For Shipping) | 1 |
| 60***11 | Water Separator A | 1 |
Optional Parts
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Attachment Side (1/3)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***70 | Capscrew - M12 | 4 |
| 01***11 | Nut - Mounting | 24 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Attachment Side (2/3)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 2 |
| 01***35 | Bolt,(Not Used With Rops Canopy) | 4 |
| 01***11 | Nut - Mounting | 16 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Attachment Side (3/3)
| 01***32 | Washer, (Without Emergency Steering) | 8 |
| 07***45 | O-Ring,Without Revolution Sensor | 2 |
| 07***32 | O-Ring,(See Fig. H0312-01a0-4) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Change Rotor And Swivel Joint
| 01***30 | Bolt,(Not Used With Emergency Str.) | 1 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 8 |
| 01***25 | Bolt, Mount Filter To Bracket | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Cotrol Valve To Change Rotor Block
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***60 | Bolt, Tube To Oil Cooler | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Additional Piping? Pilot Line
| 01***80 | Bolt,(For Long Lever Control) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Car Cooler Piping
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Used When Towing Winch) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Clamshell Bucket?Digging Type
| 01***25 | Bolt - Rear Guard Mounting | 4 |
| 01***30 | Bolt,(For Center Guard) | 4 |
| 01***35 | Bolt,(For Pedal Steering) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Clamshell Cylinder
| 07***45 | O-Ring,Cover | 1 |
| 07***06 | Bushing | 2 |
| 07***60 | Seal,(Y1620-41a0a-14) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Clamshell Piping
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 24 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Compressor And Control Panel
| 20***60 | Case Ass'Y | 1 |
| 20***70 | Switch | 1 |
| 20***80 | Resistor | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Condenser Unit
| 20***70 | Condenser | 1 |
| 20***80 | Motor,Fan | 1 |
| 20***90 | Shroud | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Control Pedal And Linkage? For Additional Piping
| 01***15 | Bolt (Op) | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 7 |
| 01***60 | Capscrew | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Cooling Unit
| 20***60 | Evaporator | 1 |
| 20***70 | Case Ass'Y | 1 |
| 20***80 | Grille Ass'Y | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Deluxe Seat
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 4 |
| 20***40 | Belt,Seat | 1 |
| 20***90 | Bracket | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Head Guard
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Long Life Tooth
| 20***80 | Tooth | 0 |
| (0***6) | Pin | 0 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Pre-Fuel Filter (Except Japan)
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Revolving Frame And Floor Rework Parts? For Add. Piping
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 1 |
| 01***09 | Seat,(Welded To Revolving Frame) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Self Supply Pump
| 07***20 | Hose | 1 |
| 07***59 | Clamp - Drain Hose | 2 |
| 20***30 | Wire | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Short Arm (2200mm)
| 01***45 | Bolt | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Water Separator
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Optional Parts : Window Washer
| 01***16 | Bolt (Welded) | 2 |
| 01***12 | Screw,(Except Japan) | 2 |
| 01***13 | Washer,(For Alternator 50a) | 2 |
Revolving Frame And Cab
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Heater
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt - Rear Guard Mounting | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (1/6)
| 01***20 | Bolt | 8 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt - Rear Guard Mounting | 23 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (2/6)
| 01***25 | Bolt - Rear Guard Mounting | 33 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 37 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (3/6)
| 01***20 | Bolt | 8 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt - Rear Guard Mounting | 21 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (4/6)
| 01***25 | Bolt - Rear Guard Mounting | 40 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 40 |
| 20***60 | Step | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (5/6)
| 01***25 | Bolt - Rear Guard Mounting | 38 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 38 |
| 09***00 | Lock,(Not Used When Towing Winch) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Machinery Compartment (6/6)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 16 |
| 01***25 | Bolt - Rear Guard Mounting | 16 |
| 01***10 | Screw | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Marks And Plates (Arabic)
| 01***08 | Screw | 4 |
| 09***00 | Plate? Safety,Swing Lock Lever | 1 |
| 09***00 | Plate? Caution,Kiip Out Of Turning Area | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Marks And Plates (English)
| 01***08 | Screw | 4 |
| 09***00 | Plate? Safety,Lock Lever (With Lock Pin) | 1 |
| 09***00 | Plate? Safety,Off Limit Within Swing Area | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Marks And Plates (Japanese)
| 01***08 | Screw | 4 |
| 09***00 | Plate? Safety,Swing Lock Lever | 1 |
| 09***00 | Plate? Caution,Keep Out Of Turning Area | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (1/6)
| 01***12 | Bolt,(Without R.P.C.U.) | 6 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (2/6)
| 01***25 | Bolt (M6-1.00x25) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***55 | Bolt | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (3/6)
| 01***16 | Screw,(For Alternator 50a) | 4 |
| 01***16 | Screw, Mount Parking Lights | 2 |
| 01***15 | Screw | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (4/6)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***12 | Screw,(Additional Sun Visor) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (5/6)
| 01***08 | Screw, Terminal | 2 |
| 01***12 | Screw,(Additional Sun Visor) | 2 |
| 01***16 | Screw,(P.O.C. Model) (Except Japan) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab (6/6)
| 01***12 | Screw | 2 |
| 01***08 | Screw, Terminal | 2 |
| 01***25 | Screw | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Cab Frame
| 01***16 | Bolt (Welded) | 4 |
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Operator'S Seat
| 01***20 | Bolt,(Large Capacity Type) (Std) | 5 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Revolving Frame
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt - Rear Guard Mounting | 12 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Revolving Frame And Cab : Under Cover
| 01***25 | Bolt - Rear Guard Mounting | 82 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 82 |
| 20***12 | Cover | 1 |
Swing And Control Systems
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Accumulator
| 20***10 | Accumulator | 1 |
| NF***61 | Bladder | 1 |
| NF***75 | Core | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.N.C. Valve
| 01***35 | Bolt,(Without Auto Priming System) | 4 |
| 01***55 | Bolt,(For Trimming Dozer) | 2 |
| 01***80 | Bolt,(See Fig.0131) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Boom And Bucket)(#10001-10494)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 10 |
| 07***10 | Union,(For 2nd Travel Speed) (Op) | 5 |
| 07***10 | Elbow | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Boom And Bucket)(#10495-)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 10 |
| 07***10 | Union,(For 2nd Travel Speed) (Op) | 5 |
| 07***10 | Elbow | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Boom And Swing)(#10001-10494)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 10 |
| 07***10 | Union,(For 2nd Travel Speed) (Op) | 5 |
| 07***10 | Elbow | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Boom And Swing)(#10495-)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 13 |
| 07***10 | Union,(For 2nd Travel Speed) (Op) | 4 |
| 07***10 | Elbow | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Pump To Valve) (1/3)
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 4 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Pump To Valve) (2/3)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 2 |
| 01***25 | Bolt - Rear Guard Mounting | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : P.O.C. Valve Piping (Pump To Valve) (3/3)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Pilot Valve : Unit_02_of_02
| 01***20 | Bolt,(With Auto Emergency Steering) | 10 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Pilot Valve : Unit_01_of_02
| 01***18 | Bolt | 8 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 8 |
| 07***21 | O-Ring (Kit) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Relief Valve
| 01***05 | Nut (Welded) | 1 |
| 07***32 | O-Ring,Drain Plug? Main Clutch | 1 |
| 07***15 | O-Ring,Regulator Valve | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Circle
| 01***45 | Bolt, Mounting Front Axle | 34 |
| 01***55 | Bolt, Mount Standard Weight | 36 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 70 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Machinery (1/2)
| 01***30 | Bolt,Radio Controlled Slag Handling | 3 |
| 01***55 | Bolt,(For Long Track) | 21 |
| 01***45 | Bolt, Mounting Front Axle | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Machinery (2/2)
| 01***30 | Bolt,Radio Controlled Slag Handling | 4 |
| 01***60 | Bolt, Hanger Bearing Mounting | 12 |
| 01***70 | Bolt, Mount Fuel Tank - Rear | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Motor Brake Valve(#10001-10510)
| 01***70 | Bolt,(With Wear Guard) | 8 |
| 01***18 | Bolt | 8 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Motor Brake Valve(#10511-)
| 01***70 | Bolt,(With Wear Guard) | 8 |
| 01***18 | Bolt | 8 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Motor(#10001-10510)
| 01***55 | Bolt,(10m) | 4 |
| 01***55 | Bolt | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Swing Motor(#10511-)
| 01***55 | Bolt | 8 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Valve Control Lever And Linkage (1/2)
| 01***40 | Bolt,(For Position Fixing) | 4 |
| 01***08 | Nut,R.H. Thread | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Valve Control Lever And Linkage (2/2)
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Swing And Control Systems : Valve To/From Swing Motor Piping
| 01***25 | Bolt - Rear Guard Mounting | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 16 |
Tool And Kit
Komatsu : Pc300-1(S/N 10001-Up) : Tool And Kit : Tool
| 07***00 | Pump,Grease | 1 |
| 07***00 | Cartridge,Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Travel And Final Drive
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Final Drive Case And Sprocket
| 01***45 | Bolt,(For Slag Handling) | 22 |
| 01***50 | Bolt, Radiator To Frame | 38 |
| 01***85 | Bolt,Front | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Final Drive Gear
| 01***60 | Bolt,Reamer | 24 |
| 01***16 | Nut | 24 |
| 04***60 | Key | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Motor Drain Piping
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Propel Control Lever And Linkage
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***25 | Screw | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Propel Motor
| 01***05 | Bolt, Mount Tube | 3 |
| 01***15 | Screw | 2 |
| 01***45 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Propel Motor Brake Valve
| 01***18 | Bolt | 8 |
| 01***30 | Bolt, Mount Pump | 8 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Propel Motor Parking Brake
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
| 01***45 | Hexagon Bolt | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Swivel Joint
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
| 04***30 | Ring, Retaining | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Swivel Joint To/From Propel Motor Piping(#10001-10502)
| 01***50 | Bolt,(For Trimming Dozer) | 16 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***50 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Swivel Joint To/From Propel Motor Piping(#10503-)
| 01***50 | Bolt,(For Trimming Dozer) | 16 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***60 | Bolt (M10-1.50x60) | 16 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Valve To/From Swivel Joint Piping(#10001-10454)
| 01***30 | Bolt,Radio Controlled Slag Handling | 2 |
| 01***45 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***55 | Bolt,(For France Noise Suppression) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Travel And Final Drive : Valve To/From Swivel Joint Piping(#10455-)
| 01***30 | Bolt,Radio Controlled Slag Handling | 2 |
| 01***45 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***55 | Bolt,(For France Noise Suppression) | 2 |
Under Carriage
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Carrier Roller
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***75 | Bolt, Hanger Bearing Mounting | 8 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Front Idler
| 01***35 | Bolt, Mounting - Flywheel Housing End | 16 |
| 01***13 | Nut - Cylinder Mounting | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 16 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Recoil Spring
| 01***20 | Bolt,(Used When Towing Winch) | 4 |
| 01***30 | Screw | 2 |
| 01***00 | Bolt | 16 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Track Frame
| 01***20 | Bolt,(Used When Towing Winch) | 9 |
| 01***50 | Bolt, Radiator To Frame | 16 |
| 01***45 | Bolt, Mount Bracket | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Track Roller(#10001-10339)
| 01***30 | Bolt,(For France Noise Suppression) | 12 |
| 01***65 | Bolt,L.H | 56 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 12 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Track Roller(#10340-)
| 01***30 | Bolt,(For France Noise Suppression) | 12 |
| 01***65 | Bolt,L.H | 56 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 12 |
Komatsu : Pc300-1(S/N 10001-Up) : Under Carriage : Track Shoe
| 01***26 | Nut? Shoe (Kit) | 360 |
| 14***23 | Link,Track? L.H | 90 |
| 14***24 | Link,Track? L.H | 90 |
Work Equipment
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Arm
| 01***45 | Bolt, Fuel Tank Mounting - Front Right | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Boom
| 01***12 | Bolt,(Without R.P.C.U.) | 4 |
| 01***45 | Bolt,(For Slag Handling) | 8 |
| 01***40 | Bolt, Fuel Tank Mounting - Rear | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Bucket? 1.2m3? 1300mm
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 5 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Bucket? 1.2m3? 1300mm (Except Japan)
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 5 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Light Work Bucket? 1.4m3? 15000mm? W. H. A. S. C. (E. J.)
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 6 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Light Work Bucket? 1.4m3? 1500mm
| 09***16 | Pin,(Except Japan) | 6 |
| 20***41 | Adapter (Welded) | 6 |
| 20***51 | Tooth,(Except Japan) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Light Work Bucket? 1.4m3? 1500mm (Except Japan)
| 09***16 | Pin,(Except Japan) | 6 |
| 20***41 | Adapter (Welded) | 6 |
| 20***51 | Tooth,(Except Japan) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Light Work Bucket? 1.4m3? 1500mm? With Side Cutter
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 6 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Link
| 01***19 | Nut - M24 | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
| 20***80 | Seal,Dust (Kit) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Long Arm
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 16 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Ripper
| 09***08 | Pin,(Without Pin Puller) | 1 |
| 19***31 | Point,Short?(Yellow) | 1 |
| 20***10 | Ripper Ass'Y | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Ripper Bucket
| 09***08 | Pin,(Without Pin Puller) | 3 |
| 19***31 | Point,Short?(Yellow) | 3 |
| 20***10 | Bucket | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Rock Bucket? 1.02m3? 1170mm
| 09***16 | Pin,(Except Japan) | 4 |
| 20***41 | Adapter (Welded) | 4 |
| 20***10 | Bucket | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Short Arm
| 07***00 | Fitting, Grease - Upper Hinge Pin | 1 |
| 07***00 | Fitting, Grease (Steering Cylinder) | 1 |
| 07***00 | Seal,Dust (Kit) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Trapezoidal Bucket
| 20***10 | Bucket,Trapezoidal | 1 |
| 20***20 | Plate (Welded) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Trenching Bucket? 1.0m3? 1125mm
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 4 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment : Trenching Bucket? 1.0m3? 1125mm (Except Japan)
| 01***32 | Nut | 10 |
| 09***16 | Pin,(Except Japan) | 4 |
| 19***30 | Bolt,Shoe (Kit) | 10 |
Work Equipment Control System
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Air System (1/2)
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Air System (2/2)
| 01***16 | Bolt (Welded) | 2 |
| 01***19 | Washer,(Not Used With Ventilator) | 2 |
| 01***08 | Washer | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Arm And Bucket Piping (Chassis Side)(#10001-10454)
| 01***30 | Bolt,Radio Controlled Slag Handling | 6 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 2 |
| 01***55 | Bolt,(For France Noise Suppression) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Arm And Bucket Piping (Chassis Side)(#10455-10494)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
| 01***50 | Bolt,(For Strengthened Cover) | 2 |
| 01***65 | Bolt, Mount Radiator To Frame (Bottom) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Arm And Bucket Piping (Chassis Side)(#10495-)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
| 01***50 | Bolt,(For Strengthened Cover) | 4 |
| 01***65 | Bolt, Mount Radiator To Frame (Bottom) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Arm Cylinder
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Boom Cylinder
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 4 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Boom Piping (Chassis Side) (1/2)
| 01***30 | Bolt,Radio Controlled Slag Handling | 6 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Boom Piping (Chassis Side) (2/2)
| 01***45 | Bolt,(For Suction? Reversible Fan) | 8 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 2 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Boom?Arm And Bucket Cylinder Piping
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 10 |
| 01***60 | Bolt, Trunnion Cap | 4 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 104 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Bucket Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Check Valve
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
| 04***93 | Ball,Steel | 6 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For High Swing
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt (Op) | 6 |
| 01***30 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For L.H. Travel? Swing And Arm(#10001-10494)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt, Mount Spool Covers | 10 |
| 01***25 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For L.H. Travel? Swing And Arm(#10495-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt, Mount Spool Covers | 10 |
| 01***25 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For Low Swing
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt (Op) | 4 |
| 07***30 | Ring, Seal - Between Sections | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For R.H. Travel? Boom And Bucket(#10001-10494)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt, Mount Spool Covers | 10 |
| 01***25 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Control Valve? For R.H. Travel? Boom And Bucket(#10495-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt, Mount Spool Covers | 10 |
| 01***25 | Bolt | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump And P.C.Regulator Valve? For P.A.A. (1/3)
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 26 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump And P.C.Regulator Valve? For P.A.A. (2/3)
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump And P.C.Regulator Valve? For P.A.A. (3/3)
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
| 01***65 | Bolt,(Except Japan) | 4 |
| 01***00 | Bolt, Mount Back-Up Alarm | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump? For Swing And Valve Control (1/2)
| 01***42 | Washer,Spring (For Pedal Steering), Washer-Spring | 8 |
| 04***20 | Ring, Retaining | 1 |
| 70***30 | Coupling Assembly | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump? For Swing And Valve Control (2/2)
| 70***30 | Pump Ass'Y | 1 |
| 70***30 | Pump Ass'Y | 1 |
| 70***10 | Pump Ass'Y | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Hydraulic Tank
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt - Rear Guard Mounting | 6 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Main Relief Valve
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 07***16 | O-Ring | 1 |
| 07***16 | Ring, Back-Up | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Main Relief Valve? For Swing
| 01***05 | Nut (Welded) | 2 |
| 07***12 | O-Ring (Itl) | 2 |
| 07***12 | Ring,Back-Up; Was 07001-02012, Ring,Back-Up (Itl) | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Pump To Valve Piping
| 01***55 | Bolt,(For Suction? Reversible Fan) | 4 |
| 01***60 | Bolt (M10-1.50x60) | 4 |
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 4 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Pump To Valve Piping (2/2)(#10001-10203)
| 01***50 | Bolt | 5 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 6 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Pump To Valve Piping (2/2)(#10204-10289)
| 01***50 | Bolt | 5 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 6 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Pump To Valve Piping (2/2)(#10290-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 16 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 8 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Return And Oil Cooler Piping (1/2)
| 01***25 | Bolt - Rear Guard Mounting | 2 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***60 | Bolt, Trunnion Cap | 2 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Return And Oil Cooler Piping (2/2)
| 01***25 | Bolt - Rear Guard Mounting | 6 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 4 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 5 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Suction And Safty Valve (1/2)
| 07***34 | O-Ring,Transmission And Steering Case | 1 |
| 07***34 | O-Ring,See Fig. K4010-65a0 | 1 |
| 70***00 | Valve Ass'Y,Suction And Safety? R.H | 3 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Suction And Safty Valve (2/2)
| 07***34 | O-Ring,Transmission And Steering Case | 1 |
| 07***34 | O-Ring,See Fig. K4010-65a0 | 1 |
| 70***10 | Sleeve | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Suction Valve? For Swing
| 07***34 | O-Ring, O-Ring, Oil Level And Fill Plug | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 70***60 | O-Ring (Itl) | 1 |
Komatsu : Pc300-1(S/N 10001-Up) : Work Equipment Control System : Tank To Pump Piping (1/2)
| 01***40 | Bolt,(For Position Fixing) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 6 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 16 |
PC300-1(S/N 10001-UP) serial number reference
The serial number plate is riveted to the right-hand side of the cab on the lower frame, typically behind the front idler or beneath the operator window. The serial is also stamped directly into the chassis frame casting on the and right-hand side. Cross-check the riveted plate against the engraved frame number to ensure accuracy.
| Prefix | Identifies | Notes |
|---|---|---|
| K55 | PC300-1 (S/N 10001-UP) | Serial prefix K55 corresponds to the PC300-1 generation. Specific serial numbers in this range (e.g., K55001-UP) are documented for this model. Verify the exact serial number on the machine plate to confirm fitment. |
Frequently asked questions
What engine is used in the PC300-1 (S/N 10001-UP)?
The machine is equipped with a Cummins N855C engine, providing 180 hp (134 kW) of net power.
What is the operating weight of this excavator?
The standard operating weight for the PC300-1 is approximately 63,934 lb (29,000 kg).
What model replaced the PC300-1?
The PC300-1 was succeeded by subsequent generations in the Komatsu lineage, including the PC300-2 and PC300-3 series.
What PC300-1(S/N 10001-UP) owners discuss
What are the common causes of a loss in digging power on a PC300-1?
Loss of digging force is typically caused by hydraulic pressure leaks rather than engine horsepower issues. Common causes include relief valves opening prematurely due to wear or debris, internal leakage in the main control valve, and cylinder piston seal bypass where oil crosses the piston internally. Pump wear is also common on older units, often manifesting as strong performance when cold but weakness after 20–30 minutes of operation.
What engine is installed in the Komatsu PC300-1 (S/N 10001-UP)?
The PC300-1 (S/N 10001-UP) is equipped with a Cummins N855C engine, providing 180 hp (134 kW) of net power.
How can I diagnose a total loss of hydraulic movement on this machine?
If all movements have stopped, check the pilot pressure. A common failure point is the pilot pressure reducing valve; if pressure at the pump output is below 3/4 psi (20 bar), this valve may require replacement. Additionally, verify that power is reaching the safety solenoid and LS-EPS solenoids.
What are the typical symptoms of a failing hydraulic oil cooler on Komatsu excavators?
Failure of the hydraulic oil cooler typically results in sluggish, delayed, or weaker hydraulic movements, particularly after the machine has been working hard for an extended period.
What should I check regarding the electrical system if troubleshooting intermittent issues?
Check the small computer mounted behind the cab; it uses red and green diodes for troubleshooting. If these lights are not functioning, there is likely a wiring harness problem. For swing-related issues, inspect the wiring to the solenoid or the swing brake timer/switch.
What should I check when buying a used Komatsu PC300-1?
Verify the exact serial-prefix specification sheet and the installed attachment package. Check for signs of hydraulic pressure loss, such as cylinders drifting or functions stalling under load. Inspect the undercarriage for wear and confirm the presence of any specific regional emissions configurations or heavy-duty attachments like long sticks or wide track shoes.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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