Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC01-1A(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC01-1A(S/N 10001-UP) is Komatsu's ultra-compact "micro" hydraulic excavator, an operating weight class of roughly 300-380 kg (660-840 lb) depending on track width and blade configuration. It runs on a single-cylinder, air-cooled Honda GX160K1 gasoline engine rated around 2.6 kW (3.5 hp) at 3000 rpm — not a diesel unit, and with no coolant system or electronic engine controls. It rides on narrow rubber crawler tracks around 150 mm wide, digs to roughly 1.0-1.05 m depth on a short boom/arm combination (about 920 mm boom, 480 mm arm), and is sized to pass through standard doorways and load onto a light pickup or mini-truck bed. The -1A designation (S/N 10001-up) is a running update of the original PC01 micro-excavator platform Komatsu introduced around 1990, offered with variations in track width and dozer-blade fitment for narrow-access jobsites.
The -1A revision carried the same micro-excavator concept forward but is documented under its own S/N 10001-up parts and shop literature, separate from the later Japan-market PC01-1 production block, so parts, hydraulic schematics, and torque figures should be matched to the correct serial range rather than assumed interchangeable. Komatsu has since extended the micro-excavator idea into an electric platform built around a swappable battery pack, but the gasoline PC01-1A stays in demand in the used and parts market precisely because it needs no charging infrastructure, draws on a simple and inexpensive small-engine parts supply chain, and its tiny hydraulic system keeps rebuild and reseal costs low compared with full-size mini excavators.
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 PC01-1A(S/N 10001-UP) specifications
Engine
| Engine model | Gasoline single-cylinder engine (Honda GX160K1 type), air-cooled |
| Gross power | 2.6 kW (3.5 hp) at 3000 rpm |
| Displacement | 163 cc (0.16 L) |
| Cylinders | 1 (single-cylinder) |
| Emissions tier | Not documented for this compact class/era — verify with your dealer |
Weights
| Operating weight | roughly 300 to 500 kg (660 to 1100 lb), varies by configuration/series; 380 kg (838 lb) is the most consistently reported figure — confirm against the machine's nameplate |
| Ground pressure | 16.6 kPa (2.4 psi) |
| Transport weight | Not separately documented — operating weight is the figure used across sources |
Dimensions
| Transport (shipping) length | 2100 mm (6.89 ft) |
| Overall width (outside of tracks) | 580 mm (1.91 ft) |
| Tail swing radius | 650 mm (2.14 ft) |
| Track shoe width | 130 mm (5.1 in) |
| Ground clearance | 100 mm (0.33 ft) |
| Track gauge | 450 mm (1.48 ft) |
| Transport height | Not documented in available sources — verify with your dealer |
Performance
| Max digging depth | 1050 mm (3.45 ft) |
| Max reach at ground level | 1925 mm (6.32 ft) |
| Max cutting/dump height | 1850 mm (6.07 ft) |
| Max loading height | 1310 mm (4.3 ft) |
| Swing speed | 7 rpm |
| Travel speed | 1.4 km/h (0.9 mph) |
| Gradeability | Not documented in available sources |
| Drawbar pull | Not documented in available sources |
Forces
| Bucket digging force | Approximately 4 kN for this ultra-compact class; figures vary by source — verify with your dealer |
| Arm/stick digging force | Not documented in available sources |
Service capacities (summary)
| Fuel tank | 4.5 L (1.2 gal) |
| Hydraulic system | 4.8 L (1.3 gal) |
| Engine oil | Not documented in available sources |
| Cooling system | Not applicable — engine is air-cooled, no liquid cooling system |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC01-1A(S/N 10001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (oil pan, w/ filter) | 0.6 L (0.16 US gal) | Gasoline-engine motor oil, SAE 10W-30 (API SE/SF or later); this machine runs a small air-cooled 4-cycle gasoline engine, not a Komatsu diesel — follow the engine builder's viscosity chart for ambient temperature. |
| Cooling system | Not applicable | Engine is air-cooled; no liquid coolant circuit is fitted on this model. |
| Fuel tank | 4.5 L (1.2 US gal) | Unleaded gasoline (regular automotive petrol) — this is a gasoline-powered micro excavator, not diesel. |
| Hydraulic system total | 5.7 L (1.5 US gal) | Komatsu Genuine anti-wear hydraulic oil (Komatsu HO type); shear-stable, holds ISO viscosity grade through service life. |
| Hydraulic tank (refill) | 4.8 L (1.27 US gal) | Same Komatsu Genuine hydraulic oil (HO) as system fill above. |
| Final drive / travel motor (each) | Not separately documented | No separate final-drive gear case on this class of micro excavator — travel motors run off the shared hydraulic circuit and case-drain back to the hydraulic tank; no discrete gear oil fill. |
| Swing drive | Not separately documented | Swing motor is fed and case-drained through the same shared hydraulic system; no standalone swing gearbox oil reservoir on this model. |
| Pilot / other circuits | Not applicable | No separate pilot hydraulic circuit called out for this micro excavator; single pump/tank system. |
| Grease | Spec only — no fill quantity given | Komatsu Genuine multipurpose lithium EP grease (G2-LI type) for general pin and bushing points. Komatsu Hyper Grease (G2-T / G2-TE, molybdenum-disulfide fortified) is recommended where extra lubricity is needed to stop pin-and-bushing squeak. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC01-1A(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 |
|
| Every 4,000 h |
|
Servicing the PC01-1A(S/N 10001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
With only a small hydraulic system on this machine, fluid checks lean on sight-glass and visual inspection rather than lab sampling: watch for milky or hazy hydraulic oil, a sign of water intrusion past cylinder rod seals from wet-trench work. Check engine oil for a gasoline smell or thin, dark color that signals cold-start fuel dilution in the Honda GX160K1. Note spark plug color at each service for lean/rich running, and track cycle-time drift as an early warning of pump or relief-valve wear.
Corrective & Common Repairs
Frequent issues on this machine trace back to its small gasoline engine and tiny hydraulic circuit: carburetor gum and varnish from stored fuel sitting between jobs, rod seal weeping on the boom, arm, and bucket cylinders after digging in mud, and spark plug fouling from extended idling in confined spaces. On the undercarriage, the narrow 150 mm rubber tracks can detrack on uneven ground, and swing or travel motor case drains should be checked for seepage after heavy use.
Overhaul & Rebuild Points
At higher hours, plan for a hydraulic pump and control valve reseal or rebuild, full cylinder reseal kits on the boom, arm, and bucket, and undercarriage wear checks on the rollers, idlers, and sprocket. Because the Honda GX160K1 is a small air-cooled gasoline engine rather than a diesel, its top end (piston, rings, valve seats) wears faster relative to hour count and should be inspected or rebuilt on its own schedule, independent of the hydraulic-side overhaul points.
Seasonal & Environment Servicing
With an air-cooled gasoline engine and no coolant system, cold-weather starts on this machine come down to fresh fuel, correct choke use, and the right oil viscosity rather than antifreeze checks. Its main niche is confined, indoor, or near-people work, so confirm exhaust ventilation when running it inside buildings and avoid stale, gummed-up gasoline sitting over winter layup. Wet-trench and landscaping use accelerates cylinder rod seal wear and undercarriage grit packing, so step up track cleaning and pin greasing; hot, dusty conditions call for more frequent cooling-fin and air-filter cleaning since there is no fan-clutch radiator to fall back on.
PC01-1A(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| HD17210ZE1822 | Element Ass'Y,Air Cleaner | Air intake service | Check fitment → |
| FF1542-85230 | Element | Scheduled service item | Check fitment → |
| HD17218ZE1821 | Filter | Scheduled service item | Check fitment → |
| 21A-62-12260 | Filter | Scheduled service item | Check fitment → |
| 21A-62-12140 | Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC01-1A(S/N 10001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| No CID/FMI or E-series fault codes | This machine has no electronic engine controller and no diagnostic code system | The PC01-1A is fitted with a Honda GX160K1, a small air-cooled, carbureted gasoline engine with no ECM and no wiring harness for fault reporting | Diagnose engine problems using standard small-gasoline-engine checks (spark, fuel delivery, air filter, compression, oil level) rather than a code reader |
| Oil Alert auto-stop (no display code) | Engine will not start, or stops running, when crankcase oil drops below the safe level | Float-type low-oil sensor in the crankcase trips and cuts ignition | Check engine oil level and top up to the upper mark on the dipstick/gauge, then retry starting |
| No hydraulic monitor/warning lamps | Machine has no instrument panel or monitor display for hydraulic pressure, temperature, or system faults | Design predates Komatsu's electronic monitor panels; hydraulics are controlled by mechanical pilot levers only | Inspect hydraulic circuit manually per the shop manual (pump output, relief valve settings, cylinder leakage) rather than expecting an on-machine warning |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC01-1A(S/N 10001-UP) attachments & work tools
Buckets
Factory fit is a single pin-on trenching bucket sized to the boom/stick reach of this micro excavator class; published capacity figures vary widely (roughly 0.01-0.1 m3) — confirm against the bucket actually mounted. No GD/HD/rock tiered bucket lineup is documented for this model; it is a light-duty digging bucket only, not a multi-duty bucket range.
Hydraulic hammers
No factory or aftermarket hydraulic breaker line is documented specifically for this model. Pump output is roughly 10 L/min (2.7 gal/min) at about 14.7 MPa (2130 psi) relief pressure, well under the flow most mini-excavator breakers need to cycle (smallest common breaker classes start near 20-30 L/min), so a hydraulic hammer is not a practical fit for this machine without a modified circuit.
Quick couplers
No quick-coupler system is referenced in available documentation for this model. Given its size and single-bucket use case, the bucket is pinned directly to the stick rather than run through a mechanical or hydraulic coupler.
Thumbs/grapples
Used-market examples show this model fitted with a hydraulic thumb kit for gripping debris or material, so aftermarket thumb kits exist in the field for this class. No factory pin size or mounting spec is published, so fitment should be verified against the specific stick before ordering a kit.
Rippers
No ripper attachment is documented for this model. Micro excavators in this weight class are not typically offered with a ripper tooth or shank option.
Hydraulic-kit notes
The machine runs a single standard work circuit (about 10 L/min at approximately 14.7 MPa relief pressure) with no documented auxiliary or high-flow circuit for powered attachments. This limits it to passive tools (bucket, thumb) rather than flow-hungry tools like hammers or compactors unless the hydraulic system is modified.
All PC01-1A(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC01-1A(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System And Revolving Frame
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Blade Control Lever
| 01***30 | Bolt | 1 |
| 01***23 | Washer,(With Auto Emergency Steering) | 1 |
| 04***24 | Pin, Spring | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Boom And Bucket Control Lever
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***03 | Nut, L. H. Thread | 2 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Boom Swing Control Pedal
| 04***16 | Pin, Spring | 1 |
| 04***08 | Pin,Cotter | 1 |
| 04***10 | Pin, Cotter | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Fuel Control Lever
| 01***16 | Screw | 1 |
| 01***10 | Nut,(Fig.F2820-01a3-12) | 2 |
| 01***12 | Washer,(With Body Positioner) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Revolving Frame
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***25 | Bolt - Relay Mounting | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Swing And Arm Control Lever (Komatsu Pattern)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
| 01***08 | Nut (Op) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Travel Control Lever
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***16 | Screw | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Travel Control Lever (Tbg Spec.) (Except Japan)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***16 | Screw | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Travel Lock Pedal (Tbg Spec.) (Except Japan)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Control System And Revolving Frame : Work Equipment Control Lock Lever
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Engine Related Parts And Electrical System
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Battery
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 21***10 | Batt? Wet 12n18-3-1,12v 18ah | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System
| 01***30 | Bolt,See Fig. K4010-17a0 | 1 |
| 01***12 | Bolt,(With Speedometer) | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 01***06 | Nut | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine Related Parts
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***35 | Bolt,(For Position Fixing) | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***30 | Bolt | 3 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
| 01***03 | Nut,(With Joy Stick Steering) | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Engine Related Parts And Electrical System : Work Lamp
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 01***06 | Nut | 1 |
| 08***00 | Fuse, Radio 3a | 1 |
Guard
Komatsu : Pc01-1a(S/N 10001-Up) : Guard : Machine Body Sheet
Komatsu : Pc01-1a(S/N 10001-Up) : Guard : Machine Cab
| 01***16 | Bolt, Mount Solenoid Valve | 6 |
| 01***25 | Bolt - Relay Mounting | 3 |
| 15***70 | Washer,(With Body Positioner) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Guard : Machine Cab (Tbg Spec.) (Except Japan)
| 01***16 | Bolt, Mount Solenoid Valve | 6 |
| 01***25 | Bolt - Relay Mounting | 3 |
| 15***70 | Washer,(With Body Positioner) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Guard : Operator'S Seat
| 01***12 | Bolt,(With Speedometer) | 6 |
| 04***18 | Pin,Cotter (With Body Positioner) | 2 |
| 09***22 | Pin (Itl) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Guard : Operator'S Seat (Tbg Spec.) (Except Japan)
| 01***12 | Bolt,(With Speedometer) | 6 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 04***18 | Pin,Cotter (With Body Positioner) | 2 |
Gx160k1-Skm-1 Engine S/N 2087000-Up
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Air Cleaner And Connection
| HD***21 | Filter | 1 |
| HD***20 | Elbow Ass'Y | 1 |
| HD***10 | Stud | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Buzzer And Regulator
| HD***10 | Regulator | 1 |
| HD***00 | Suspension | 1 |
| HD***03 | Buzzer Ass'Y | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Camshaft And Rocker Arm
| HD***00 | Lifter | 2 |
| HD***10 | Plate,Guide | 1 |
| HD***00 | Spring | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Carburetor
| HD***12 | Packing | 1 |
| HD***05 | Screw Ass'Y | 1 |
| HD***00 | Insulator | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Crank Case Cover
| HD***00 | Pipe,Oil Filler | 1 |
| HD***40 | Pin | 2 |
| HD***10 | Cap,Oil | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Crank Shaft
| HD***00 | Gear,Timing | 1 |
| HD***00 | Gear,Governor Drive | 1 |
| HD***00 | Key | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Cylinder Block
| HD***00 | Washer | 2 |
| HD***00 | Pin | 1 |
| HD***00 | Pin | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Cylinder Head
| HD***00 | Cylinder Head Ass'Y | 1 |
| HD***00 | Valve,Intake | 1 |
| HD***00 | Retainer,Exhaust Valve | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Cylinder Head Cover
| HD***00 | Cover,Head | 1 |
| HD***00 | Clip | 2 |
| HD***00 | Packing | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Flywheel? Cooling Fan And Cover
| 01***10 | Bolt - Relay And Flasher Mounting | 1 |
| 01***30 | Bolt,See Fig. K4010-17a0 | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Fuel Pump And Piping
| HD***00 | Suspension | 1 |
| HD***40 | Tube | 1 |
| HD***83 | Fuel Pump Ass'Y | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Governor Arm Control And Carburetor Control
| HD***10 | Bolt | 1 |
| HD***50 | Rod,Choke | 1 |
| HD***0H | Screw | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Muffler And Mounting
| HD***00 | Protector,Inner | 1 |
| HD***00 | Pipe,Exhaust | 1 |
| HD***00 | Muffler | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Piston And Connecting Rod
| HD***23 | Piston Ring Ass'Y | 1 |
| HD***23 | Piston Ring Ass'Y | 1 |
| HD***00 | Pin,Piston | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Spark Plug And Ignishion Coil
| HD***00 | Bolt | 1 |
| HD***01 | Charge Coil Ass'Y | 1 |
| HD***00 | Bolt | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Starting Motor
| HD***23 | Starting Motor Ass'Y | 1 |
| HD***13 | Motor Ass'Y | 1 |
| HD***03 | Washer,Spring | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Gx160k1-Skm-1 Engine S/N 2087000-Up : Starting Motor And Mounting
| HD***00 | Pin | 2 |
| HD***00 | Cover | 1 |
| HD***03 | Screw | 1 |
Mark Plate? Tool And Kit
Komatsu : Pc01-1a(S/N 10001-Up) : Mark Plate? Tool And Kit : Marks And Plates (English)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Mark,Komatsu | 2 |
| 09***24 | Plate? Mark,Komatsu | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Mark Plate? Tool And Kit : Marks And Plates (French)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Mark,Komatsu | 2 |
| 09***24 | Plate? Mark,Komatsu | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Mark Plate? Tool And Kit : Marks And Plates (German)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Mark,Komatsu | 2 |
| 09***24 | Plate? Mark,Komatsu | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Mark Plate? Tool And Kit : Service Kit
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 70***00 | O-Ring (Kit) | 1 |
| 70***00 | Ring,Back-Up (Kit) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Mark Plate? Tool And Kit : Tool
| 07***40 | Tube | 1 |
| 21***10 | Wrench | 1 |
| 21***30 | Funnel | 1 |
Swing System
Komatsu : Pc01-1a(S/N 10001-Up) : Swing System : Swing Circle
| 01***25 | Bolt,Without Revolution Sensor | 8 |
| 01***40 | Bolt,(With Air Conditioner) | 8 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 2 |
Under Carriage
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Front Idler
| 04***12 | Ring, Snap (4) | 2 |
| 06***05 | Bearing, Ball | 2 |
| 21***00 | Idler Ass'Y | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Hydraulic Piping (Travel Motor Line) (Lower)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***35 | Screw | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Loading Bridge
| 21***10 | Bridge | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Rubber Shoe
| 21***10 | Rubber Shoe Ass'Y | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Sprocket
| 21***10 | Sprocket | 2 |
| 21***20 | Seal,Dust | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Track Frame
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***16 | Washer,(With Water Separator) | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Under Carriage : Track Roller
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 04***12 | Ring, Snap (4) | 2 |
| 06***05 | Bearing, Ball | 2 |
Work Equipment
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Arm
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 21***30 | Arm Ass'Y | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Arm Cylinder
| 01***11 | Nut,(For Center Guard) | 1 |
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 21***20 | Cylinder Ass'Y,Arm | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Blade
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 21***50 | Pin | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Blade (Tbg Spec.) (Except Japan)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Screw | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Blade Cylinder
| 01***11 | Nut,(For Center Guard) | 1 |
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 21***50 | Cylinder Ass'Y,Blade | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Boom
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Boom (Tbg Spec.) (Excpet Japan)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Boom Cylinder
| 01***11 | Nut,(For Center Guard) | 1 |
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 21***10 | Cylinder Ass'Y,Boom | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Bucket Cylinder
| 01***11 | Nut,(For Center Guard) | 1 |
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 21***30 | Cylinder Ass'Y | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Bucket Link
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
| 21***40 | Link Ass'Y | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Bucket? 0.007m3 (Mini 0.01m3) 266mm
| 21***10 | Bucket,(266mm) | 1 |
| 21***20 | Tooth (Welded) | 3 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Carry Bucket
| 21***10 | Bucket,Carry | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Hydraulic Piping (Blade Cylinder Line)
| 21***40 | Hose | 1 |
| 21***50 | Hose | 1 |
| 21***20 | Elbow | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line)
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 04***08 | Clip | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (Tbg Spec.) (Except Japan)
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
| 04***08 | Clip | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Long Arm
| 21***30 | Bushing | 6 |
| 21***40 | Seal,Dust | 6 |
| 21***10 | Long Arm Ass'Y (Paint 1) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Long Arm (Tbg Spec.) (Except Japan)
| 21***30 | Bushing | 6 |
| 21***40 | Seal,Dust | 6 |
| 21***10 | Long Arm Ass'Y (Paint 1) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Narrow Bucket? 0.004m3 (Mini 0.004m3) 150mm
| 21***20 | Tooth (Welded) | 2 |
| 21***11 | Bucket,(150mm) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Ripper (3teeth)
| 21***10 | Ripper | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Ripper Bucket
| 21***11 | Bucket,Ripper | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Skeleton Bucket
| 21***10 | Bucket,Skeleton | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Swing Bracket
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Swing Cylinder
| 01***11 | Nut,(For Center Guard) | 1 |
| 07***30 | O-Ring,Boom (For 50 Feet Long Front) | 1 |
| 21***40 | Cylinder Ass'Y,Swing | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Utility Fork
| 21***10 | Fork,Utility | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment : Wide Bucket? 0.008m3 (Mini 0.011m3) 300mm
| 21***20 | Tooth (Welded) | 3 |
| 21***10 | Bucket,(300m) | 1 |
Work Equipment Control System
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Control Valve (1/3) (8-Spool)
| 01***10 | Bolt | 8 |
| 01***40 | Bolt | 8 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 6 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Control Valve (2/3) (8-Spool)
| 01***10 | Bolt | 8 |
| 01***40 | Bolt | 8 |
| 07***11 | O-Ring,(Tm8202-009) | 10 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Control Valve (3/3) (8-Spool)
| 01***06 | Nut | 2 |
| 07***23 | O-Ring,(F4350-66a1 -1c ) | 2 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 3 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Piping (Boom And Arm Cylinder Line)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
| 08***20 | Band | 3 |
| 21***50 | Nipple | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Piping (Boom And Arm Cylinder Line) (Tbg Spec.) (Except Japan)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Piping (Swing Motor And Swing Cylinder Line)
| 01***35 | Screw | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 2 |
| 07***18 | O-Ring, Divider Valve Mounting | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Piping (Tank? Pump To Valve Line)
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
| 01***14 | Bolt - Plate Mounting | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 3 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Piping (Travel And Blade Line) (Upper Side)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 5 |
| 21***20 | Elbow | 6 |
| 21***50 | Nipple | 3 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump (1/2)
| 04***12 | Ring,Snap | 1 |
| 70***10 | Seal,Oil | 1 |
| 70***00 | Pump Ass'Y,(Fbr(00)1.6+1.6) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Pump (2/2)
| 07***11 | O-Ring (Kit) | 1 |
| 70***40 | Plug | 1 |
| (7***0) | Pump Ass'Y,(Fbr(00)1.6+1.6) | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Hydraulic Tank
| 01***16 | Bolt (With Air Heater & Conditioner) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***40 | Bolt | 4 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Swing Motor
| 21***00 | Swing Motor Ass'Y | 1 |
| 21***10 | Screw | 7 |
| 21***20 | Geroler | 1 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Swivel Joint
| 01***18 | Bolt, Mount Cover | 4 |
| 04***18 | Ring,Snap (With Emergency Steering) | 1 |
| 07***11 | Plug,(For Shipping) | 2 |
Komatsu : Pc01-1a(S/N 10001-Up) : Work Equipment Control System : Travel Motor
| 01***55 | Screw | 4 |
| 01***13 | Nut | 1 |
| 04***28 | Pin,Cotter (Kit), Cotter Pin; Was 04050-14028 | 1 |
Frequently asked questions
What engine powers the Komatsu PC01-1A(S/N 10001-UP)?
A single-cylinder, air-cooled Honda GX160K1 gasoline engine rated around 2.6 kW (3.5 hp) at 3000 rpm. It is not a diesel engine, has no coolant system, and carries no electronic engine controls or fault codes.
What is the operating weight of the PC01-1A(S/N 10001-UP)?
Approximately 300-380 kg (660-840 lb), varying with track width and blade configuration. Sources differ within this range, so treat it as a working figure rather than a single fixed number and confirm against the machine's nameplate.
What replaced the Komatsu PC01-1A(S/N 10001-UP)?
Komatsu did not issue a direct like-for-like gasoline successor. The micro-excavator concept continues today as the electric PC01E-1, which runs on a swappable battery power pack instead of a gasoline engine. Check with your dealer for an exact factory succession statement for this serial range.
What PC01-1A(S/N 10001-UP) owners discuss
What engine does the PC01-1A (S/N 10001-up) run, and what do owners say about it?
This machine uses a Honda GX160K1 air-cooled single-cylinder gasoline engine, rated around 2.6 kW (3.5 hp), not a small diesel like the Komatsu 3D-series fitted to larger PC-class minis. Because it is a small industrial gas engine, most documented care reads like general small-engine maintenance rather than heavy-equipment engine work: keep fuel fresh, since the small carburetor jets gum up quickly if old or ethanol-blended fuel sits in the bowl, and keep the air filter clean, since a dusty jobsite bogs a 160cc engine fast. Troubleshooting stays simple — fuel, spark, air — with no electronic fault-code diagnosis involved. No turbo, no DPF, no aftertreatment to worry about.
How does the hydraulic system on this micro excavator behave, and what wears out first?
The PC01-1A runs a low-flow, low-pressure hydraulic circuit sized to its roughly 300 kg (660 lb) class — on the order of a few gallons per minute at a couple thousand psi, well below a compact-excavator-scale system. What is consistently true for mini excavator hydraulics generally applies here at smaller scale: cylinder rod seals are usually the first thing to weep once a machine has some age or has sat outdoors, dirt on an exposed rod is what kills a seal early, and any scoring or pitting on the rod chews through a new seal kit fast. Given the small cylinder bores on this class of machine, seal work is delicate and best left to someone experienced with small-bore cylinders — have your dealer verify before doing cylinder seal work yourself.
What undercarriage or track wear pattern is typical for a machine this size?
It rides on small rubber tracks rather than a steel-shoe undercarriage. Because the whole machine is so light, the tracks rarely wear out from load. The more common findings on this class of machine are dry rot and cracking from UV/ozone exposure after sitting outdoors between jobs, plus lug wear or de-tracking if sag is not kept in spec. General rubber-track sag guidance for small excavators runs close to 25 mm (1 in) of deflection; too tight accelerates wear, too loose lets the track walk off the rollers on a turn. Given the low hours most of these machines accumulate, undercarriage failure from use is unusual — cracked or dry-rotted rubber from age and storage is the more common finding on a used unit.
Does the PC01-1A have onboard electronics or sensors that commonly fail?
Not in the way a modern diesel excavator does. There is no ECM, no emissions sensors, and no digital fault-code system tied to this engine/hydraulic combination. What little electrical trouble gets reported for this class of gas-engine micro excavator is limited to basic ignition issues, such as a fouled spark plug from a rich idle mixture, and on electric-start units, a weak battery or starter after long idle periods between jobs. Treat electrical troubleshooting here like small gas-powered garden equipment, not like diagnosing a modern excavator control system.
Are there quirks that carry across the PC01 gasoline-engine series, or is the PC01-1A different from its siblings?
Documentation for this range and its immediate siblings both point to the same Honda GX160-family gasoline engine, so the small-engine quirks carry across the series rather than being unique to one serial block: carbureted (not fuel-injected), sensitive to stale fuel, and reliant on a clean air filter for consistent output. Reported specs for bucket capacity, digging depth, and engine output are close but not identical across PC01 variants in different listings, so treat exact figures as series-typical rather than locked to one configuration, and confirm the specific number against the machine's own dataplate.
What do people actually use this machine for, and what limitations come up in practice?
This is Komatsu's smallest rideable excavator, sized to fit through a standard doorway and load onto a light or mini truck. It comes up mainly as a niche tool for close-in landscaping, ornamental or nursery work, indoor demolition prep, and utility digging in spaces no other excavator can reach — not as a production digging machine. The recurring caveat is that digging force and depth (roughly 1 m / 3.5 ft class) are intentionally modest for a machine this size, and buyers expecting mini-excavator-class output are disappointed. It is a precision, intermittent-use tool, not a substitute for even the smallest conventional mini excavator.
What should I check before buying a used PC01-1A (S/N 10001-up)?
Start the engine cold and confirm it starts and idles cleanly on its own fuel — a hard or no-start after fuel has sat is the most common gas-engine complaint on equipment this size. Check every cylinder rod for pitting or scoring and look for oil weeping at the rod seals; on a machine this small, a scored rod usually means a full cylinder rebuild rather than a simple reseal. Flex and inspect the rubber tracks for cracking, dry rot, or exposed cord, and confirm sag is close to spec rather than stretched out. Ask for the hour meter reading and any service records, and check for surface rust or corrosion consistent with coastal storage if the machine came through import. Parts and service support for this specific serial range can be thin outside its home market — have your dealer verify parts and service availability before you buy.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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