Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC15-2A(S/N 2001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC15-2A (S/N 2001-UP) is a mini excavator in the compact class, designed for utility and tight-space work. It features a compact radius tail swing and is powered by a Komatsu diesel engine. The machine has an operating weight of approximately 2,480 kg (5,468 lb). It succeeded the PC15-2 series and was produced from 1989 through the early 2000s. Configurations included standard and 6-way control options. It is part of the broader PC15 family, which includes variants like the PC15R-8 and PC15MRX-1.
Across the PC15 lineage, generations shifted from older mechanical controls to more advanced hydraulic systems and emissions-compliant engines. The PC15-2A remains significant in the used market due to its durability and availability of parts. Its compact size and reliable Komatsu powertrain make it a staple for municipal and residential projects. The machine's longevity ensures a robust aftermarket for undercarriage and hydraulic components.
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 PC15-2A(S/N 2001-UP) specifications
Engine
| Model | 3D78-1E |
| Gross Power | 23.7 HP (17.7 kW) @ 2,600 RPM |
| Displacement | 1.232 L (75.2 cu.in.) |
| Cylinders | Not documented for this exact serial range — verify with your dealer |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | 2,480 kg (5,468 lbs) |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
| Transport Weight | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | 4,465 mm (14'8") |
| Transport Width | 1,450 mm (4'9") |
| Transport Height | 2,285 mm (7'6") |
| Tail Swing Radius | Not documented for this exact serial range — verify with your dealer |
| Track Shoe Width | 300 mm (1'0") |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
| Undercarriage Length | 1,920 mm (6'4") |
Performance
| Max Dig Depth | 2,500 mm (8'2") |
| Max Reach at Ground | 4,390 mm (14'5") |
| Max Dump Height | Not documented for this exact serial range — verify with your dealer |
| Max Cutting Height | 4,480 mm (14'8") |
| Swing Speed | 9.2 rpm |
| Travel Speed | 2.0 km/h (1.2 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 | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System/Tank | Not documented for this exact serial range — verify with your dealer |
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | 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.
Komatsu PC15-2A(S/N 2001-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 PC15-2A(S/N 2001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals and hydraulic oil contamination. Check coolant SCA levels at 500 hours to prevent corrosion in the PC15-2A's cooling system. Inspect hydraulic hose condition daily for cracks or leaks, as high-pressure lines are critical for the machine's proportional servo-controls. Monitor fuel filter water separator daily to protect the injection system. Track undercarriage wear measurements at 500-hour intervals to predict track chain and sprocket life.
Corrective & Common Repairs
Address hydraulic leaks by replacing seals on the boom, stick, and bucket cylinders, which are common failure points. Replace the hydraulic return filter at 500 hours to prevent pump wear. Inspect the swing bearing for play or noise, indicating potential gear wear. Check the final drive oil for metal particles, signaling internal gear damage. Replace worn track shoes and idlers to maintain proper track tension and reduce undercarriage stress. Verify electrical connections for the KOMTRAX display and gauges.
Overhaul & Rebuild Points
At 2,000 hours, inspect the hydraulic pump for flow and pressure loss, replacing worn pistons or swash plates if necessary. Check the engine cylinder head gasket for coolant leaks or compression loss. Inspect the turbocharger for shaft play or oil seal leaks. Evaluate the swing machinery oil for contamination, replacing it if viscosity changes. Check the final drive housing for cracks or seal leaks. Inspect the boom and stick welds for structural fatigue, especially near the pivot points.
Seasonal & Environment Servicing
In cold weather, ensure coolant antifreeze concentration is adequate to prevent freezing. Use low-viscosity engine oil for cold starts. Check the battery charge regularly, as cold temperatures reduce capacity. In hot weather, clean debris from the radiator and oil cooler fins to prevent overheating. Inspect the air filter more frequently in dusty environments. Check track tension in muddy conditions to prevent excessive wear. Verify the operation of the heater and defroster for operator comfort.
PC15-2A(S/N 2001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| YM129100-55650 | Element,Fuel Filter | Fuel system service | Check fitment → |
| 20S-98-12230 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| YM171301-92750 | Wrench,Engine Oil Filter | Lubrication service | Check fitment → |
| 20N-98-39340 | Plate? Caution,Engine Oil Filter | Lubrication service | Check fitment → |
| YM121120-12901 | Element | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC15-2A(S/N 2001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure or engine control drive system circuit malfunction. | Faulty ECM power connections, blown fuses, or ground wire issues. | Inspect ECM power connections, fuses, and ground wires. |
| E11 | Engine control system failure; output power reduced to protect the engine. | High coolant temperature, low oil pressure, or clogged air filter. | Check coolant temperature, oil pressure, and air filter condition. |
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure. | Broken speed sensor, wiring issue, or connector corrosion. | Replace the speed sensor and verify voltage at the pin connector. |
| CA441 | Battery voltage too low. | Weak battery, failing alternator, or loose connections. | Replace the battery or alternator; check the voltage regulator. |
| CA442 | Battery voltage too high. | Failing voltage regulator or alternator overcharging. | Replace the alternator or battery; check the voltage regulator. |
| CA122 | Intake air pressure sensor feedback voltage too high. | Faulty intake pressure sensor or wiring short. | Verify the intake pressure sensor and wiring integrity. |
| CA123 | Intake air pressure sensor feedback voltage too low. | Sensor short or significant airflow restriction. | Check for a sensor short or an airflow restriction. |
| CA451 | Common rail pressure sensor feedback value too high. | Malfunction in the rail sensor or actual overpressure condition. | Diagnose the fuel rail pressure sensor or pump lines. |
| CA559 | Common rail pressure too low. | Fuel supply issue, leak, or sensor failure. | Evaluate fuel pump regulator (IMV/PCV) and check for leaks. |
| DGH2KB | Hydraulic oil temperature sensor short circuit. | Faulty temperature sensor or shorted wiring. | Replace the temperature sensor. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC15-2A(S/N 2001-UP) attachments & work tools
Buckets
Standard configurations for the PC15-2A include an 18-inch (457 mm) bucket width, consistent with the 2,480 kg operating weight class. Capacity ranges are not explicitly defined in the provided source text for this specific serial range, though 18-inch widths are standard for this machine class.
Hydraulic hammers
The PC15-2A is a compact excavator with an operating weight of 2,480 kg (5,468 lbs), requiring a mini-excavator class hydraulic hammer. Specific breaker weight classes or brand recommendations are not detailed in the provided source text.
Quick couplers
The provided source text does not specify the quick coupler type or brand compatibility for the PC15-2A(S/N 2001-UP). Lehnhoff couplers are noted for the broader Komatsu range (PC09 to PC1250), but specific fitment for this model is not confirmed in the text.
Thumbs/grapples
Aftermarket hydraulic thumbs are available for the PC15 series, with specific dimensions cited as 21 inches by 7 inches (533 mm x 178 mm) for the PC15 model line. Foot-pedal-controlled hydraulic thumbs are documented as an upgrade option for this machine class.
Rippers
Ripper attachments are listed as available parts for the Komatsu PC15 series in general parts catalogs. Specific dimensions, pin diameters, or compatibility details for the PC15-2A(S/N 2001-UP) are not provided in the source text.
Hydraulic-kit notes
The PC15-2A utilizes Komatsu hydraulic fluids and oils, with specific recommendations varying by temperature range. The source text references Komatsu fluid specifications but does not detail high-flow circuit requirements or specific hydraulic kit part numbers for attachments.
All PC15-2A(S/N 2001-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC15-2A(S/N 2001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
3d78-1e Engine S/N 02853-Up
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Air Cleaner
| YM***41 | Buffle | 1 |
| YM***70 | Seat | 1 |
| YM***40 | Band Ass'Y | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Air Intake Manifold
| YM***01 | Heater,Intake Air | 1 |
| YM***00 | Manifold,Air Intake | 1 |
| YM***52 | Screw | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Alternator
| YM***01 | Alternator A. (20a) | 1 |
| YM***00 | Stator Ass'Y | 1 |
| YM***10 | Bearing,Ball | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Alternator And Mounting
| YM***70 | Stud | 1 |
| YM***02 | Nut | 1 |
| YM***30 | Plate,Adjust | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Camshaft And Tappet
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***11 | Camshaft | 1 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Crankshaft
| YM***00 | Gear,Crank | 1 |
| YM***01 | Ball,Steel | 3 |
| YM***10 | Spring Pin | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Cylinder Block
| YM***20 | Plug,Drain(Without Oil Cooler Type) | 1 |
| YM***20 | Screw | 8 |
| YM***00 | Plug | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Cylinder Head
| YM***80 | Retainer, Spring | 12 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 3 |
| YM***10 | Valve,Exhaust | 3 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Cylinder Head Cover
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***00 | Clip,Breather Hose | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Engine Stop Motor
| YM***80 | Ring,Snap | 1 |
| YM***00 | Pin,Cotter | 1 |
| YM***90 | Washer | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Exhaust Manifold And Muffler
| YM***10 | Manifold, Exhaust | 1 |
| YM***60 | Support,R.H | 1 |
| YM***50 | Connector | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Flywheel And Flywheel Housing
| YM***02 | Screw | 6 |
| YM***02 | Screw | 4 |
| YM***80 | Parallel Pin | 5 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Fuel Filter
| YM***00 | O-Ring (Kit) | 1 |
| YM***70 | Lever | 1 |
| YM***80 | Cup, Strainer | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Fuel Injection Pump
| YM***70 | Retainer, Spring | 3 |
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Fuel Injection Pump And Piping
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***30 | Bolt | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Fuel Nozzle And Spill Pipe
| YM***70 | Union | 1 |
| YM***20 | Spring | 1 |
| YM***51 | Check Valve Ass'Y,Joint | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Gasket Kit
| YM***00 | Gasket Kit | 1 |
| YM***20 | Gasket,Water Pump | 1 |
| YM***20 | O-Ring,Cylinder Head Cover Bolt | 3 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Gear Case Cover
| YM***02 | Bolt Plated | 2 |
| YM***10 | Washer,Seal | 5 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Governor
| YM***01 | Weight Assembly., Governor | 1 |
| YM***10 | Pin,Stop Lever | 1 |
| YM***90 | Shaft,Governor Lever | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Lubricating Oil Filter
| YM***50 | Nut | 1 |
| YM***02 | Bolt Plated | 3 |
| YM***50 | Cartridge,Engine | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Lubricating Oil Pump And Piping
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***40 | Gasket,Inlet Pipe | 1 |
| YM***20 | Bolt,Joint (Cylinder Head Side) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Oil Pan
| YM***40 | Oil Pan Ass'Y | 1 |
| YM***02 | Screw | 4 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Piston And Connecting Rod
| YM***00 | Screw | 2 |
| YM***80 | Piston Ass'Y | 3 |
| YM***00 | Ring,Snap | 6 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Rocker Arm
| YM***02 | Screw | 6 |
| YM***80 | Spring | 3 |
| YM***00 | Plug | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Safety Relay And Glow Plug Timer
| YM***21 | Indicator, Charging | 1 |
| YM***01 | Relay,Safety | 2 |
| YM***02 | Relay,Safety | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Starting Motor
| YM***40 | Bolt,Through | 2 |
| YM***50 | Pinion Ass'Y,Pinion | 1 |
| YM***30 | Coil Ass'Y,Field | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Starting Motor And Mounting
| YM***52 | Bolt Plated | 2 |
| (Y***0) | Starting Motor Ass'Y,(1.8kw) (See Fig.0662) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Tool
| YM***50 | Screw Driver | 1 |
| YM***50 | Wrench,Engine Oil Filter | 1 |
| YM***20 | Flex Horn (Option.) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : 3d78-1e Engine S/N 02853-Up : Water Pump And Cooling Fan
| YM***20 | Gasket,Water Pump | 1 |
| YM***30 | Cover | 1 |
| YM***02 | Screw | 1 |
Control System And Revolving Frame
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Attachment Control Pedal (For Asia)
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Blade Control Lever (For Japan) (For Asia)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Boom And Bucket Control Lever (For Japan) (For Asia)
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Boom And Bucket Control Linkage (For Japan) (For Asia)
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Boom Swing Control Lever (For Japan) (For Asia)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Fuel Control Lever
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Swing And Arm Control Lever (For Japan) (For Asia)
| 01***10 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Swing And Arm Control Linkage (For Japan) (For Asia)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***05 | Nut,L.H. Thread (D31s) | 1 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Control System And Revolving Frame : Travel Control Lever (For Japan) (For Asia)(#2447-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 5 |
| 01***25 | Screw | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
Engine Related Parts And Electrical System
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Battery
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 1 |
| 08***01 | Terminal? (-),(20l) (Not Shown) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Electrical System (Chassis Side) (For Japan) (For Asia)
| 01***10 | Bolt - Relay And Flasher Mounting | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Electrical System (Instrument Panel) (For Japan) (For Asia)
| 01***16 | Screw, Mount Parking Lights | 2 |
| 01***20 | Screw - Turn Signal And Parkinglight Mounting | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 12 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Engine Related Parts
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Power Take Off
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
Komatsu : Pc15-2a(S/N 2001-Up) : Engine Related Parts And Electrical System : Radiator And Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
Guard
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Canopy (For Japan) (For Asia)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Car Heater
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 08***19 | Band,(Without Air Conditioner) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Electrical System (For Cab)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
| 01***16 | Screw, Mount Parking Lights | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Floor Plate (For Attachment) (For Asia)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 25 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Machine Cab (For Japan) (For Asia)(#2809-)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 13 |
| 01***12 | Washer (Op) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Operator'S Cab (1/4)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Operator'S Cab (2/4)
| 20***20 | Sash Ass'Y | 1 |
| 20***30 | Sash | 1 |
| 20***60 | Glass | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Operator'S Cab (3/4)
| 01***08 | Screw | 2 |
| 01***08 | Screw | 4 |
| 04***12 | Rivet | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Operator'S Cab (4/4)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 10 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Operator'S Seat (For Japan) (For Asia)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***06 | Nut | 4 |
| 20***00 | Seat | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Guard : Window Washer
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
| 01***10 | Washer,(For 35a Alternator) | 2 |
Mark Plate? Tool And Kit
Komatsu : Pc15-2a(S/N 2001-Up) : Mark Plate? Tool And Kit : Marks And Plates (For Canopy) (English) (For Asia)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Starting And After Operating | 1 |
| 09***00 | Plate? Safety,Inspection And Maintenance | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Mark Plate? Tool And Kit : Tool (For Japan) (For Asia)
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***00 | Nozzle, Grease Pump (Flexible Type) | 1 |
Swing System
Komatsu : Pc15-2a(S/N 2001-Up) : Swing System : Swing Circle
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 14 |
| 01***60 | Bolt, Tube To Oil Cooler | 16 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Under Carriage
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Front Idler
| 01***45 | Capscrew - M10 X 1.25 | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 2 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Hydraulic Piping (Travel Motor Line) (Lower) (For Japan) (For Asia)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 18 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Recoil Spring
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 8 |
| 01***26 | Nut | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 8 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Recoil Spring (For Rubber Shoe)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 8 |
| 01***26 | Nut | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Rubber Shoe (For Japan) (For Asia)
| 20***10 | Shoe,Rubber | 2 |
| (2***0) | Rubber Shoe Group | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Sprocket
| 01***30 | Bolt,(Not Used With Emergency Str.) | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
| 20***10 | Sprocket | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Frame (For Japan) (For Asia)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Frame (For Rubber Shoe) (For Japan) (For Asia)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Roller(#2001-3337)
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 12 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 12 |
| 07***21 | O-Ring,Water Piping | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Roller(#3338-)
| 07***21 | O-Ring,Water Piping | 2 |
| 10***30 | Seal Ring Ass'Y | 1 |
| 10***40 | O-Ring Ass'Y | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Shoe (Double Grouser) (For Japan) (For Asia)
| 20***90 | Pin,Master | 1 |
| 20***10 | Bushing | 2 |
| 20***61 | Track Shoe Ass'Y | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Shoe (Flat Type) (For Japan) (For Asia)
| 20***51 | Track Shoe Ass'Y | 1 |
| 20***30 | Shoe Ass'Y,Regular | 78 |
| 20***40 | Shoe Ass'Y,Master | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Under Carriage : Track Shoe (Swamp Type) (For Japan) (For Asia)
| 20***10 | Bushing | 2 |
| 20***71 | Track Shoe Ass'Y | 1 |
| 20***00 | Shoe Ass'Y,Regular | 78 |
Work Equipment
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Arm
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Arm Cylinder
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***65 | Ring,Back-Up (Kit) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Blade (For Japan) (For Asia)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Blade (With Bolt On Cutting Edge)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Blade Cylinder (For Japan) (For Asia)(#2809-)
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Boom (Additional Piping) (For Asia)(#2809-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Boom (For Japan) (For Asia)(#2809-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Boom Cylinder (For Cab) (For Japan) (For Asia)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Boom Cylinder (For Canopy) (For Japan) (For Asia)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Bucket Cylinder
| 01***09 | Nut,(With Body Positioner) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Bucket Link
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***75 | Bolt,(For Adjusting) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Hydraulic Piping (Arm Cylinder Line) (For Japan) (For Asia)
| 01***25 | Bolt - Relay Mounting | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Hydraulic Piping (Boom Cylinder Line) (For Japan) (For Asia)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (For Japan) (For Asia)
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Long Arm
| 07***03 | Bushing | 4 |
| 07***04 | Bushing | 2 |
| 07***30 | Seal,Dust (Kit) | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Swing Bracket (For Japan) (For Asia)(#2151-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment : Swing Cylinder
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
Work Equipment Control System
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : 1-Spool Control Valve (For Attachment) (For Asia)
| 01***10 | Bolt | 2 |
| 01***16 | Bolt (Op) | 2 |
| 01***20 | Bolt (Itl) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : 2-Spool Control Valve (1/2)
| 01***10 | Bolt | 4 |
| 01***16 | Bolt (Op) | 4 |
| 01***20 | Bolt (Itl) | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : 2-Spool Control Valve (2/2)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : 6-Spool Control Valve (1/2)
| 01***10 | Bolt | 12 |
| 01***16 | Bolt (Op) | 12 |
| 01***20 | Bolt (Itl) | 6 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : 6-Spool Control Valve (2/2)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Swing Cylinder Line) (For Japan) (For Asia)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 20***40 | Nipple,(For 20p-62-72566 Hose) | 2 |
| 20***60 | Hose | 2 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Pump To Valve) (For Japan) (For Asia)
| 01***30 | Bolt,(For Mechanical Governor) | 18 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 6 |
| 01***23 | Washer,(For Shipping) | 12 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Return) (For Attachment) (For Asia)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 1 |
| 07***50 | Hose - L.H | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Swing Motor Line) (For Tilt Blade) (For Japan) (For Asia)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 07***11 | O-Ring,(Tm8202-009) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Pump) (For Japan) (For Asia)
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor? Blade Cylinder Line) (Upper) (For Japan) (For Asia)(#2809-)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 6 |
| 20***20 | Hose | 1 |
| 20***60 | Hose | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Piping (Valve To Tank) (For Attachment) (For Asia)
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***22 | Hose | 1 |
| 07***28 | Hose | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Pump (1/3)
| 04***15 | Ring, Snap | 1 |
| 70***10 | Shaft Seal | 1 |
| 70***70 | Plate | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Pump (2/3)
| 01***23 | Washer,(For Shipping) | 4 |
| 70***60 | Seal,Ring | 1 |
| 70***20 | Pump Ass'Y (Sbr8a) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Pump (3/3)
| 01***23 | Washer,(For Shipping) | 6 |
| 07***21 | O-Ring,Water Piping | 1 |
| 70***60 | Seal,Ring | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Hydraulic Tank And Filter
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Swing Motor
| 01***25 | Screw | 6 |
| 01***35 | Screw | 4 |
| 04***16 | Pin, Spring | 7 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Swivel Joint
| 01***25 | Bolt | 4 |
| 04***20 | Ring, Retaining | 1 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Travel Motor (1/2)
| 04***20 | Spring Pin | 7 |
| 04***12 | Ring, Snap (4) | 7 |
| 04***15 | Ring, Snap | 1 |
Komatsu : Pc15-2a(S/N 2001-Up) : Work Equipment Control System : Travle Motor (2/2)
| 01***20 | Screw | 6 |
| 04***16 | Pin | 1 |
| 04***12 | Pin,Spring (See Fig.0201) | 1 |
PC15-2A(S/N 2001-UP) serial number reference
Locate the serial number plate on the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The model code (PC15-2A) and sequential serial number are stamped on the plate. Cross-reference the serial number with the catalog range to confirm the correct parts book.
| Prefix | Identifies | Notes |
|---|---|---|
| PC15-2A | Standard | S/N 2001-UP. Factory parts catalog for the PC15-2A hydraulic excavator covers this serial range. Verify the machine plate against the catalog selection to ensure correct parts fitment. |
Frequently asked questions
What engine does the PC15-2A use?
The PC15-2A uses a Komatsu diesel engine. Specific model varies by serial range and region, but it is a compact, fuel-efficient unit designed for mini excavators.
What is the operating weight?
The operating weight is approximately 2,480 kg (5,468 lb), varying slightly by configuration and attachments.
What replaced the PC15-2A?
The PC15-2A was succeeded by the PC15R-8 and PC15MRX-1 series, which feature updated engines, emissions compliance, and improved hydraulic systems.
What PC15-2A(S/N 2001-UP) owners discuss
What engine powers the Komatsu PC15-2A (S/N 2001-UP) and what are its common operational quirks?
The PC15-2A (S/N 2001-UP) is powered by the Komatsu 3D84E engine. Common quirks include sensitivity to fuel quality and extended service intervals, which can accelerate injector wear. Owners report that the engine may lose power under heavy digging loads if air filters or fuel filters are restricted. The electronic throttle control contains a plastic gear that can slip a tooth under rough use or if the machine is tipped, requiring adjustment or replacement to restore proper idle and load response. The engine is robust but requires clean fuel to maintain efficiency and prevent premature wear.
What are the typical hydraulic behaviors and failure modes for this machine?
A common diagnostic pattern is hydraulics that work well when cold but become weak or sluggish as the oil warms up. This indicates internal leakage in the main pump, main control valve, or cylinders, as viscosity drops with heat. If all functions slow down simultaneously, check the hydraulic oil level, condition, and filters first. If only one function is slow, investigate the specific cylinder, control valve spool, or load-holding valve. The main pump is a frequent point of failure in older mini-excavators; if multiple functions are weak, pressure and flow testing is required before replacing the pump. Contamination of the hydraulic fluid is a primary cause of component damage.
What undercarriage wear patterns and maintenance issues are typical for the PC15-2A?
The PC15-2A typically uses 300 mm wide track shoes. Common undercarriage issues include tracks that repeatedly loosen, often due to improper tensioning or worn idler/roller assemblies. Mud or debris packed into the undercarriage can cause binding and uneven wear. Operators should check track tension regularly and ensure rollers are not seized. The machine is prone to 'walking fatigue' or slow travel after extended use, which may indicate worn final drives or travel motors. Uneven track wear can cause the machine to pull to one side during travel; this should be distinguished from hydraulic flow imbalances by testing in both forward and reverse directions.
What electrical and sensor issues are commonly reported by owners?
Komatsu excavators rely on electronic control systems, so a single faulty sensor or unstable power supply can trigger multiple warning signals. Owners report intermittent starting, dashboard failures, and random shutdowns. Common electrical checks include battery state of charge, terminal cleanliness, and engine/chassis ground integrity. The display may dim heavily under load if the battery is weak. Fault codes such as E02 or E233 may appear, requiring diagnosis of the electronic throttle control or related sensors. Intermittent faults often stem from loose connectors or corroded grounds rather than component failure.
What specific items should be checked when buying a used PC15-2A (S/N 2001-UP)?
When inspecting a used PC15-2A, verify the serial number to confirm it falls within the 2001-UP range. Check the engine for excessive smoke or power loss under load. Test all hydraulic functions cold and hot to identify internal leakage that worsens with temperature. Inspect the undercarriage for uneven track wear, loose tracks, or seized rollers. Check the electronic throttle control for proper adjustment and ensure the plastic gear has not slipped. Verify the cooling system for blockage between the radiator, hydraulic oil cooler, and charge-air cooler. Look for signs of fluid leaks around the main pump and final drives. Confirm that the battery holds voltage under starter load and that all fault codes are cleared.
What are the recommended fluid specifications for this machine?
Komatsu recommends using Komatsu EO (Engine Oil) or equivalent high-quality diesel engine oil for the engine. For the hydraulic system, Komatsu TO (Transmission and Hydraulic Oil) or AXO (Advanced Extra-duty Oil) is specified. The cooling system requires Super-coolant AF-NAC or equivalent ethylene glycol-based coolant. Always verify the exact fluid specifications in the operation and maintenance manual for the specific serial range, as formulations may vary by region and emissions tier.
What safety-critical fixes require dealer verification?
Safety-critical systems such as the swing brake, travel interlocks, and hydraulic pressure relief valves must be verified by an authorized dealer. If the machine drifts or fails to hold position, the swing brake mechanism requires professional inspection and adjustment. Any repairs to the hydraulic pressure control system or engine electronic control unit should be performed by a dealer to ensure compliance with safety standards and proper calibration. Have your dealer verify the integrity of the safety lockout lever and neutral-start interlocks before operation.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific PC15-2A(S/N 2001-UP) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.