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Komatsu GC50-1(S/N 1001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu GC50-1 (S/N 1001-UP) is a self-propelled road cutter from Komatsu's GC-series pavement-cutting lineup, built to score, cut, and remove asphalt and concrete using a diamond or carbide-segmented cutting wheel rather than a bucket, blade, or fork despite the loader-style model number. It sits at the small end of the GC-series range, below the mid-size GC135 and GC190 and the larger GC380F-2. No factory spec sheet with a confirmed engine model, operating weight, or cutting width/depth survives in circulation for this exact model and serial range. The only cross-model clue available is a fuel lift pump parts cross-reference tying the GC50-1 to the same small-diesel family used on era-contemporaneous Komatsu compact excavators and a mini wheel loader, which hints at (but does not confirm) a diesel in roughly the 30-50 hp class. No documented sub-variants or configuration options beyond this S/N 1001-UP production block are confirmed.
Komatsu's GC-series road cutters were built for pavement-cutting contractors, DOT crews, and utility trenching work, spanning small self-propelled units like the GC50-1 up through the far larger GC380F-2. Across the series, later and larger models generally moved to bigger cutting wheels, higher-output engines, and more standardized water-spray dust suppression, though none of that documented change history ties specifically back to the GC50-1 itself. In today's used and parts market, the GC50-1 is a scarce, thinly documented machine: original spec sheets and owner discussion are effectively unavailable, which makes verified take-off parts, engine identification from the machine itself, and a knowledgeable Komatsu dealer more valuable than published literature when sourcing components or planning service.
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 GC50-1(S/N 1001-UP) specifications
Engine
| Engine identity | Exact engine model not documented in available public sources for this serial range. Fuel-system components (fuel lift pump) are shared with several other small Komatsu machines of the same era (CD30R-1 tracked carrier, PC25-1 / PC30-7 / PC40-7 mini excavators, WA40-3 mini wheel loader), which point to a small Yanmar-derived diesel in Komatsu's compact-equipment engine family. Not confirmed as an exact match — verify with your dealer or the machine data plate. |
| Gross/net power, displacement, cylinders, emissions tier | Not documented for GC50-1 (S/N 1001-UP) in available sources. |
Weights
| Operating weight | Not documented for GC50-1 (S/N 1001-UP) in available sources. GC50-1 is the compact end of Komatsu's road-cutter lineup (below GC135, GC190 and GC380F-2), so a light, maneuverable class is expected, but no verified figure was found — confirm with your dealer. |
| Shipping weight | Not documented for this serial range. |
| Ground pressure | Not published for this model. |
Dimensions
| Frame configuration | Articulated-frame chassis, built to maneuver into confined areas — around manholes and obstacles — that the larger GC380F road cutter cannot reach. |
| Transport length/width/height | Not documented for GC50-1 (S/N 1001-UP) in available sources. |
| Wheelbase / track gauge | Not documented for this serial range. |
| Ground clearance | Not documented for this serial range. |
Performance
| Application class | Self-propelled road/pavement cutter used for precision cutting in tight spaces, working alongside larger GC-series cutters that handle the primary, wide-area cuts. |
| Travel speeds | Not documented for GC50-1 (S/N 1001-UP) in available sources. |
| Cutting width / cutting depth | Not documented for GC50-1 specifically. Note: published cutting-width and cutting-depth figures exist for the larger GC380F-2 sibling model but do not carry over to this smaller GC50-1 — do not substitute across models. |
| Gradeability | Not published for this model. |
Service capacities (summary)
| Fuel tank | Not documented for GC50-1 (S/N 1001-UP) in available sources. |
| Hydraulic system | Not documented for this serial range. |
| Engine oil | Not documented for this serial range. |
| Cooling system | Not documented for this serial range. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
GC50-1(S/N 1001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not documented for this exact serial range — capacity varies by configuration; verify with your dealer or the machine's OMM | Komatsu Genuine engine oil (EO grade). Viscosity by climate per Komatsu's standard chart: EO10W-30 for general/temperate use, EO0W-30 or EO5W-30 in cold climates, EO15W-40 in hot climates |
| Cooling system | Not documented for this exact serial range — verify with your dealer or the machine's OMM | Komatsu Genuine coolant, permanent-type antifreeze (AF-NAC), factory pre-mixed for year-round use and corrosion protection |
| Fuel tank | Not documented for this exact serial range — verify with your dealer or the machine's OMM | Diesel fuel meeting Komatsu's specified sulfur and cetane requirements for the engine fitted (exact engine model not confirmed for this serial range) |
| Hydraulic system (tank and circuit) | Not documented for this exact serial range — verify with your dealer or the machine's OMM | Komatsu Genuine hydraulic oil (HO grade), viscosity graded by ambient temperature similar to engine oil selection |
| Travel/final drive (crawler undercarriage, where fitted) | Not documented for this exact serial range — verify with your dealer or the machine's OMM | Komatsu Genuine powertrain/gear oil (TO grade) where a geared final-drive unit is fitted |
| Grease points | Spec only — no fill capacity applies | Komatsu Genuine multipurpose grease (lithium-base EP grease); low-temperature grease grade for cold-climate operation |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu GC50-1(S/N 1001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the GC50-1(S/N 1001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
With no factory fluid capacities or engine model confirmed for this exact GC50-1 serial range, base a fluid analysis program on sample-and-trend rather than published intervals: pull engine oil and hydraulic oil samples at each service to track wear metals from the cutting wheel drive and hydraulic motors. Watch hydraulic oil closely for water and slurry contamination pulled in from the wet-cutting spray system, and treat any coolant loss as an early flag on the small diesel given the absence of documented cooling-system specs.
Corrective & Common Repairs
Expect wear concentrated at the cutting wheel: segment chipping, spindle bearing play, and worn or clogged spray nozzles that starve the cut of cooling water and accelerate segment wear. On the small diesel powertrain, mechanical fuel system faults (no ECM, no fault codes) show up as hard starting or power loss rather than a diagnostic readout, so troubleshoot injectors and the lift pump directly. Hydraulic drive leaks at hose fittings near the cutting arm are common given the vibration this assembly sees in service.
Overhaul & Rebuild Points
Plan overhaul around the cutting-head gearbox and drive clutch, the components under the most sustained load and vibration on a road cutter of this size. Inspect the main frame and cutting arm mounting welds for fatigue cracking at extended hours, since Komatsu's spec literature for this exact GC50-1 range is not available to confirm design service life. Engine top-end wear should be tracked by compression and oil consumption trend rather than a factory-stated overhaul interval, which is not documented for this model.
Seasonal & Environment Servicing
Because this machine wet-cuts pavement, flush and clear the water spray system and screen before storage to prevent slurry hardening in the lines and nozzles. In cold climates, drain or protect the water spray circuit against freeze-up and check coolant protection on the small diesel. In hot or abrasive job-site conditions, service air and fuel filtration more frequently than the standard interval, since fine cutting dust and slurry mist load these components faster than typical earthmoving duty.
GC50-1(S/N 1001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| YM129100-55650 | Element,Fuel Filter | Fuel system service | Check fitment → |
| YM129100-55621 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| YM171301-92750 | Wrench,Engine Oil Filter | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
GC50-1(S/N 1001-UP) attachments & work tools
Cutting head / rotor assembly
The GC50-1's work tool is a diamond- or carbide-segmented cutting wheel mounted on a driven rotor, used to score and remove asphalt or concrete pavement. It is a fixed, purpose-built cutting head rather than a swappable bucket or fork-style attachment.
Blade / cutting-wheel sizing
Cutting width and depth scale with the machine's power class across the road-cutter line, which runs from the GC50 up through the GC380 (the largest unit cuts roughly 2,050 mm wide and 230 mm deep). Exact blade width and depth figures specific to the GC50-1 are not documented in available factory literature - verify with a dealer for this serial range.
Water-spray / dust suppression
Road cutters in this class carry an onboard water tank and spray system that cools the cutting wheel and controls dust during cutting. This is standard equipment for the machine type, though tank capacity for the GC50-1 specifically is not published.
Cutting-head guard
A guard/shield encloses the cutting wheel to contain debris and spray and to protect the operator. This is a standard safety fitment on this class of machine, not an optional extra.
Lateral (side-shift) positioning
Larger units in the same road-cutter family offer hydraulic side-shift of the cutting rotor to reposition the cut line without moving the whole machine. Whether the smaller GC50-1 shares this feature is not confirmed in available sources.
Base-machine attachment ecosystem
Unlike excavators or wheel loaders in the same era of Komatsu lineup, the GC50-1 is a dedicated single-task road cutter with no bucket, fork, quick-coupler, or hydraulic-breaker compatibility. There is no ground-engaging-tool exchange system for this model.
Engine / power class
The GC50-1 sits at the small end of the road-cutter line and used a diesel engine in roughly the same class as contemporaneous small Komatsu mini excavators and mini wheel loaders of that era, well below the larger multi-cylinder engines fitted to bigger siblings in the same family.
All GC50-1(S/N 1001-UP) assemblies by section
Every catalogued assembly group for the Komatsu GC50-1(S/N 1001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Fuel Control Lever
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Fuel Control Linkage
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***12 | Bolt - M8 - 1.25 X 12 | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Rotor Control Lever
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Rotor Control Linkage
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***10 | Nut,(Without Air Conditioner) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Travel Control Lever
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Control System : Travel Control Linkage
| 01***05 | Nut,L.H. (For Trimming Dozer) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 01***10 | Nut,(Without Air Conditioner) | 1 |
Engine Related Parts And Electrical System
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Battery
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 08***00 | Terminal? (+),(10l) (Not Shown) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Battery Line)(#1001-1026)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***12 | Bolt | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Battery Line)(#1027-)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***12 | Bolt | 1 |
| 01***14 | Bolt | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Control Valve Line)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 08***00 | Diode,(With Air Conditioner) | 8 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)(#1001-1026)
| 08***19 | Cap, At Heater Relay Terminals | 1 |
| 19***40 | Sensor,Torque Converter Oil Temp | 1 |
| 23***60 | Cap,Terminal | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Engine Line)(#1027-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Front Grille Line)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Instrument Panel Line)(#1001-1026)
| 23***40 | Switch,Travel Control | 1 |
| 26***70 | Cable | 1 |
| 26***90 | Cable | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Instrument Panel Line)(#1027-)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Rear Body Line)(#1001-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 08***20 | Bulb? 27w,(Exchange Parts) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Rear Body Line)(#1101-)
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Relay Box)(#1001-1100)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Relay Box)(#1101-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***14 | Screw | 10 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Relay Connecting Cable)(#1001-1100)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 1 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 1 |
| 26***11 | Harness | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Remote Control Box)
| 01***08 | Screw | 8 |
| 08***00 | Boot, Rubber Red | 1 |
| 08***00 | Boot, Rubber Black | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Safety Bar Switch)(#1101-)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 6 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 6 |
| 26***70 | Switch,Safety | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 16 |
| 01***30 | Bolt | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Engine Related Parts(#1001-1026)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Engine Related Parts(#1027-1100)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Engine Related Parts(#1101-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***12 | Bolt - M8 - 1.25 X 12 | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Fuel Piping(#1001-1100)
| 01***65 | Bolt,R.H | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Fuel Piping(#1101-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Fuel Tank (Tbg Spec.)(#1045-1100)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 11 |
| 01***08 | Screw, Terminal | 2 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Fuel Tank(#1001-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 11 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Fuel Tank(#1101-)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 7 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 5 |
| 01***10 | Washer,Spring (For Engine Room Lamp) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 01***06 | Screw,(Additional Sun Visor) | 4 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 6 |
| 01***12 | Screw | 6 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Instrument Panel (With Hydraulic P.T.O. Kit)
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Radiator And Piping(#1001-1100)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***70 | Bolt | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Radiator And Piping(#1101-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt - Pin Mounting | 2 |
| 01***14 | Screw | 2 |
Guard
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Articulate Lock Bar Retracting Parts(#1053-)
| 01***06 | Screw,(Additional Sun Visor) | 1 |
| 01***05 | Washer,(Additional Sun Visor) | 1 |
| 23***80 | Plate,Spring | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Frame(#1001-1100)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 04***32 | Spring Pin | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Frame(#1101-)
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (1/2) (Tbg Spec.)(#1045-1100)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (1/2)(#1001-1052)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (1/2)(#1053-1077)
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (1/2)(#1078-1100)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (1/2)(#1101-)
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (2/2) (Tbg Spec.)(#1045-1100)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 14 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (2/2)(#1001-1100)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 14 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Hood (2/2)(#1101-)
| 01***20 | Bolt,(For Mono Lever Steering) | 10 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 23***52 | Washer | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Weight(#1001-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Front Weight(#1101-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Lifting Parts (For Shipping)(#1027-)
| 26***10 | Hook | 3 |
| 26***21 | Rod | 3 |
| 26***22 | Rod | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Frame (Additional Splinkling Water Tank)(#1001-1006)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Frame (Additional Splinkling Water Tank)(#1007-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Frame(#1001-1006)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
| 01***50 | Bolt,(For Strengthened Cover) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Frame(#1007-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***12 | Nut,Lock | 1 |
| 01***08 | Nut,(For Russian) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Frame(#1101-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***12 | Nut,Lock | 1 |
| 01***08 | Nut,(For Russian) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (1/2) (Tbg Spec.)(#1045-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (1/2)(#1001-1052)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***10 | Washer,See Fig. K4010-12a0 | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (1/2)(#1053-1077)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 13 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (1/2)(#1078-1100)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (1/2)(#1101-)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (2/2) (Tbg Spec.)(#1045-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (2/2)(#1001-1052)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 19 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (2/2)(#1053-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 19 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (2/2)(#1101-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (1/2)(#1001-1052)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (1/2)(#1053-1077)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (1/2)(#1078-1100)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (1/2)(#1101-)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (2/2)(#1001-1052)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 19 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (2/2)(#1053-1100)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 19 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Rear Hood (With Hydraulic P.T.O. Kit) (2/2)(#1101-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Front)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***12 | Bolt - M8 - 1.25 X 12 | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Front) (Tbg Spec.)(#1045-1100)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***08 | Screw, Terminal | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Rear) (Tbg Spec.)(#1045-1100)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Rear)(#1001-1025)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Rear)(#1026-1067)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Safety Device (Rear)(#1068-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Guard : Step
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***12 | Screw,(Not Shown) (For Std Cab) | 2 |
Mark Plate? Tool And Kit
Komatsu : Gc50-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Marks And Plates (Germany)(#1045-1050)
| 04***08 | Rivet | 4 |
| 09***00 | Plate? Instruction,Fuel Oil | 1 |
| 09***00 | Plate? Safety,Articulate Lock | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Marks And Plates (Germany)(#1051-)
| 04***08 | Rivet | 4 |
| 09***00 | Plate? Instruction,Fuel Oil | 1 |
| 09***00 | Plate? Safety,Articulate Lock | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Tool
| 07***00 | Pump,Grease | 1 |
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Tool Box(#1101-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 23***10 | Box,Tool | 1 |
S3d84-2j Engine S/N 05091-Up
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Air Cleaner And Mounting
| YM***00 | Element,Outer | 1 |
| YM***80 | Seat,Rubber | 2 |
| YM***61 | Support | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Air Intake Manifold And Connection
| YM***01 | Heater,Intake Air | 1 |
| YM***00 | Manifold,Air Intake | 1 |
| YM***52 | Screw | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Alternator (40a)
| YM***50 | Brush Ass'Y | 1 |
| YM***00 | Retainer,Bearing | 1 |
| YM***70 | Diode Ass'Y | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Alternator And Mounting (40a)
| YM***02 | Nut | 1 |
| YM***50 | Bolt | 1 |
| YM***30 | Plate,Adjust | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Camshaft And Tappet
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***11 | Camshaft | 1 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Crankshaft
| YM***00 | Gear,Crank | 1 |
| YM***00 | Crankshaft Ass'Y | 1 |
| YM***50 | Pulley,(For Variable Pump) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Cylinder Block
| YM***60 | Cylinder Block A | 1 |
| YM***20 | Screw | 8 |
| YM***00 | Plug | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Cylinder Head
| YM***30 | Valve,Exhaust | 3 |
| YM***80 | Retainer, Spring | 6 |
| YM***40 | Seal,Valve? Exhaust (Kit) | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Cylinder Head Cover
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***00 | Clip,Breather Hose | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Diode? Timer And Safety Relay
| YM***00 | Diode | 1 |
| YM***00 | Relay, Safety | 1 |
| YM***00 | Relay, Safety | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Engine Stop Motor And Mounting
| YM***80 | Ring,Snap | 1 |
| YM***00 | Pin,Cotter | 1 |
| YM***90 | Washer | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Exhaust Manifold And Turbocharger
| YM***22 | Stud | 3 |
| YM***02 | Stud | 2 |
| YM***02 | Screw | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Flywheel And Flywheel Housing
| YM***00 | Gear,Ring | 1 |
| YM***02 | Screw | 6 |
| YM***02 | Screw | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Front Cover
| YM***02 | Bolt Plated | 2 |
| YM***10 | Washer,Seal | 4 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Filter And Piping
| YM***70 | Union | 1 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***51 | Check Valve Ass'Y,Joint | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Injection Pump (Feed Pump)
| YM***50 | Gasket,(Square Type) | 1 |
| YM***00 | Feed Pump Ass'Y,(Ass'Y Supply Only) | 1 |
| YM***00 | Feed Pump Ass'Y | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Injection Pump (Governor)
| YM***01 | Weight Assembly., Governor | 1 |
| YM***02 | Lever Ass'Y,Stop | 1 |
| YM***10 | Pin,Stop Lever | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Injection Pump (Pump)
| YM***70 | Retainer, Spring | 3 |
| YM***50 | Kit, Shim | 1 |
| YM***10 | Plate? Caution | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Injection Pump And Piping
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***30 | Bolt | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Fuel Nozzle And Spill Hose
| YM***20 | Spring | 1 |
| YM***00 | Fuel Injection Nozzle, Assembly | 1 |
| YM***00 | Fuel Nozzle Ass'Y | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Gasket Kit
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***20 | Gasket,Water Pump | 1 |
| YM***82 | Gasket,(Not Shown) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Lubricating Oil Cooler
| YM***10 | Joint,Drain | 1 |
| YM***40 | Hose,Water | 1 |
| YM***00 | Clamp | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Lubricating Oil Filter
| YM***50 | Cartridge,Engine | 1 |
| YM***51 | Cartridge | 1 |
| YM***00 | Plug | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Lubricating Oil Pump And Suction Pipe
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***40 | Gasket,Inlet Pipe | 1 |
| YM***20 | Gasket,Lubricating Oil Pump | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Muffler And Mounting
| YM***02 | Bolt Plated | 2 |
| YM***22 | Stud | 4 |
| YM***50 | Nut | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Oil Pan
| YM***40 | Oil Pan Ass'Y | 1 |
| YM***02 | Screw | 4 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Piston And Connecting Rod
| YM***00 | Screw | 2 |
| YM***00 | Crank Pin Metal A. (Std) | 1 |
| YM***51 | Piston Ring Ass'Y,0.25mm (Os) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Rocker Arm
| YM***02 | Screw | 6 |
| YM***80 | Spring | 3 |
| YM***00 | Plug | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Starting Motor
| YM***50 | Pinion Ass'Y,Pinion | 1 |
| YM***20 | Housing,Center | 1 |
| YM***40 | Field Coil Ass'Y | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Starting Motor And Mounting
| YM***52 | Bolt Plated | 2 |
| (Y***0) | Starting Motor Ass'Y,(2kw)(See Fig.0661) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Tool
| YM***50 | Wrench,Engine Oil Filter | 1 |
| YM***20 | Flex Horn (Option.) | 1 |
| YM***60 | Fuel, Wrench, Strainer | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Turbocharger
| YM***20 | Shield,Heat | 1 |
| YM***80 | Housing Ass'Y,Blower | 1 |
| YM***25 | Housing Ass'Y,Turbine | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Turbocharger Lubricating Oil Piping
| YM***01 | Pipe,Outlet | 1 |
| YM***10 | Washer,Seal | 2 |
| YM***60 | O-Ring (Kit) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Water Pump And Cooling Fan
Komatsu : Gc50-1(S/N 1001-Up) : S3d84-2j Engine S/N 05091-Up : Water Separator
| YM***00 | Gasket | 2 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Plug,Air | 2 |
Steering And Axle
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Articulate Cylinder
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
| 07***04 | Bushing | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Front Axle(#1001-1052)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 54 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Front Axle(#1053-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 54 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Power Take Off
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***30 | Bolt,(With Body Positioner) | 10 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Rear Axle(#1001-1100)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***50 | Bolt,(For Tbg/Abe Spec.) | 8 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Rear Axle(#1101-)
| 01***45 | Bolt,(With Water Separator Type) | 6 |
| 01***35 | Bolt,(With Rops) | 2 |
| 01***50 | Bolt,(For D60pl) | 8 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Steering Cylinder
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***55 | O-Ring,(F4350-62a1 -14 ) | 1 |
| 07***56 | Ring,Back-Up (Kit) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Steering Piping (Articulate Cylinder Line)
| 01***18 | Bolt | 1 |
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Steering And Axle : Steering Piping (Steering Cylinder Line)
Wheel And Roller
Komatsu : Gc50-1(S/N 1001-Up) : Wheel And Roller : Roller(#1001-1025)
| 01***40 | Screw | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 26***10 | Roller | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Wheel And Roller : Roller(#1026-)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
| 01***40 | Screw | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Wheel And Roller : Wheel
| 26***00 | Wheel,Front | 2 |
| 26***00 | Wheel,Rear | 2 |
Work Equipment
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Circle Cutting Guide(#1026-1100)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***20 | Bolt? Wing,(Noise Suppression Spec.) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Cover (1/2)(#1001-1025)
| 01***16 | Bolt (With Air Heater & Conditioner) | 7 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 20 |
| 01***25 | Bolt,Without Revolution Sensor | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Cover (1/2)(#1026-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 17 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Cover (2/2)(#1001-1025)
| 01***10 | Bolt,For Additional Rear Lamp | 3 |
| 01***18 | Bolt | 8 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Cover (2/2)(#1026-)
| 01***10 | Bolt,For Additional Rear Lamp | 4 |
| 01***18 | Bolt | 7 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Lift Gage
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***20 | Bolt? Wing,(Noise Suppression Spec.) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Slider(#1001-1025)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 28 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Slider(#1026-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 28 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor Tilt Gage
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor(#1001-1025)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***60 | Bolt, Tube To Oil Cooler | 1 |
| 01***40 | Bolt,(Tm8072-123) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Rotor(#1026-)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***60 | Bolt, Tube To Oil Cooler | 1 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping (With Additional Tank)(#1001-1025)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***11 | Nut,(With Under Mirror) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping (With Additional Tank)(#1026-1100)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***11 | Nut,(With Under Mirror) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping (With Additional Tank)(#1101-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping(#1001-1025)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping(#1026-1100)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Piping(#1101-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Tank(#1001-1026)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 07***00 | Cap | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Tank(#1027-1100)
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : Splinkling Water Tank(#1101-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment : V-Rotor(#1026-)
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 4 |
| 01***60 | Bolt, Tube To Oil Cooler | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
Work Equipment Control System
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Control Valve(#1001-1100)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***65 | Bolt | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Control Valve(#1101-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***65 | Bolt | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Motor (For Rotor Revolution)
| 23***50 | Housing,Bearing | 1 |
| 26***00 | Motor Ass'Y | 1 |
| 26***40 | Shaft Ass'Y | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Motor (For Travel) (1/3)
| 26***00 | Motor Ass'Y,Travel | 2 |
| 26***10 | Service Kit,Travel Motor | 2 |
| 26***20 | Reduction Ass'Y | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Motor (For Travel) (2/3)
| 26***50 | Block Ass'Y | 1 |
| 26***60 | Plate Ass'Y,Base | 1 |
| KB***10 | Plug | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Motor (For Travel) (3/3)
| 26***30 | Block Ass'Y,Relief | 1 |
| 26***40 | Relief Valve Ass'Y | 2 |
| KB***04 | Piston | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Oil Filter
| 26***20 | Filter Ass'Y | 1 |
| 26***10 | Head | 1 |
| 26***20 | Cover | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Oil Cooler Line)(#1001-1100)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Oil Cooler Line)(#1101-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Rotor Lift Cylinder Line)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Rotor Revolution Line)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 07***04 | Hose,R.H. Lift Cylinder | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Rotor Revolution Line) (With Hydraulic P.T.O. Kit) (1/2)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***75 | Bolt,(For Shipping) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Rotor Revolution Line) (With Hydraulic P.T.O. Kit) (2/2)
| 01***45 | Bolt | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***08 | Screw - Clip Mounting | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Rotor Tilt Cylinder Line)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Control Valve) (1/2)(#1001-1100)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,See Fig. K4010-65a0 | 2 |
| 01***32 | Washer (Op) | 8 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Control Valve) (1/2)(#1101-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,See Fig. K4010-65a0 | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Control Valve) (2/2)
| 01***20 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (1/2)
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 1 |
| 01***05 | Bolt, Mount Hose Clip | 2 |
| 01***75 | Bolt | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (2/2)(#1001-1026)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***75 | Bolt | 2 |
| 01***08 | Nut,(For Russian) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (2/2)(#1027-1100)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***75 | Bolt | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (2/2)(#1101-)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***75 | Bolt | 2 |
| 01***08 | Nut,(For Russian) | 2 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Pump(#1001-1100)
| 26***00 | Pump Ass'Y | 1 |
| 26***01 | Pump Ass'Y | 1 |
| KB***21 | Plate Ass'Y,Center | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Pump(#1101-)
| 26***02 | Pump Ass'Y | 1 |
| KB***00 | O-Ring (Kit) | 1 |
| KB***13 | Repair Kit,Hydraulic Pump | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Tank(#1001-1100)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Tank(#1101-)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Rotor Lift Cylinder
| 04***20 | Ring, Snap | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 1 |
Komatsu : Gc50-1(S/N 1001-Up) : Work Equipment Control System : Rotor Tilt Cylinder
| 07***48 | O-Ring,(F4350-64a0 -21 ) | 1 |
| 07***45 | O-Ring,(F4350-60a0 -9 ) | 1 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Frequently asked questions
What engine does the Komatsu GC50-1 (S/N 1001-UP) use?
Not confirmed for this exact model and serial range. A fuel lift pump parts cross-reference links the GC50-1 to the same small-diesel family used on era-contemporaneous Komatsu compact excavators and a mini wheel loader, suggesting a diesel in roughly the 30-50 hp class, but no factory spec sheet confirms a specific engine model for the GC50-1. Verify the actual engine tag on the machine itself or with a Komatsu dealer before ordering parts.
What is the operating weight of the Komatsu GC50-1 (S/N 1001-UP)?
No published operating weight exists for this exact model and serial range. As a small self-propelled road cutter, it falls well under the larger GC135, GC190, and GC380F-2 in the same lineup, but no verified figure is available to state a specific weight or range. Check the machine's data plate or a Komatsu dealer for a confirmed figure.
What replaced the Komatsu GC50-1 (S/N 1001-UP)?
No confirmed successor model is documented for the GC50-1. Komatsu's GC-series road cutter lineup continued with other models such as the GC135, GC190, and GC380F-2, but no source ties any of them to the GC50-1 as a direct replacement. Treat this as an open question pending dealer or factory confirmation.
What GC50-1(S/N 1001-UP) owners discuss
Is there active owner or operator discussion online about the Komatsu GC50-1 road cutter?
No. This is a low-volume, specialized self-propelled road cutter and it has essentially no footprint on general equipment forums or operator blogs. Searches turn up parts-catalog listings and manual aggregator pages, not firsthand maintenance threads or buyer reviews. Treat any generic "road cutter" or "concrete saw" advice found online as unverified for this specific machine unless a source ties it directly to the GC50-1.
What engine does the community say the GC50-1 runs, and how confident can you be in that?
Parts cross-reference listings tie the GC50-1 to the same small industrial diesel family used across several small Komatsu/Yanmar-powered machines of that era, but no forum thread or independent write-up confirms a single pinned engine designation for the S/N 1001-UP range specifically. Do not assume a specific block or displacement without pulling the engine tag on the actual unit and having your dealer verify it against the serial number.
What wear patterns are typical for self-propelled diamond/carbide road cutters in general, and do they apply to the GC50-1?
Across road-cutting and diamond-grinding equipment generally, the recurring themes are cutting-wheel segment wear and chipping from misalignment or excessive runout, spindle bearing wear from inadequate lubrication, and dust/slurry intrusion into seals and bearings if flush water or vacuum extraction is neglected. These are generic to the equipment class, not confirmed GC50-1-specific reports, since no operator threads for this exact model exist. If your unit shows spindle vibration or uneven segment wear, have your dealer verify spindle bearing and alignment condition before returning it to service.
What hydraulic or drive-system quirks show up in community discussion for this machine?
None documented. No forum posts, blog write-ups, or mechanic Q&A specific to the GC50-1 hydraulic travel or cutting-wheel drive circuit were found. General small self-propelled equipment of this class commonly develops hydraulic pump or motor wear and hose deterioration with age, but nothing ties those generic patterns to this model by name in any source located.
Are there known electrical or sensor issues reported for the GC50-1?
None found. There is no community reporting on instrument cluster faults, sensor drift, or wiring issues for this model. Given the era and class of machine, expect a simple analog/mechanical control setup rather than an electronically managed engine, but confirm actual configuration on the specific serial with your dealer rather than assuming.
What should a buyer check before purchasing a used Komatsu GC50-1 (S/N 1001-UP)?
Because there is no owner community to draw "known failure" tips from, treat this as a straight mechanical inspection: check cutting-wheel segment wear and spindle runout, inspect the water/slurry management system for leaks or clogging, check undercarriage or drive-wheel wear consistent with hours run, verify the engine data plate and confirm it matches the machine's documented history, and pressure-test the hydraulic travel and cutting-depth circuits for drift or slow response. Pull maintenance records if available since low production volume means parts lead times can be long. Have your dealer verify engine identity, hydraulic circuit condition, and cutting-wheel spindle bearing play before purchase.
Why is there so little online discussion of this model compared to mainstream Komatsu machines?
The GC-series road cutter line (GC50-1 and siblings like GC135, GC190, GC380F-2) is a narrow application niche — pavement removal contractors and utility crews — sold in far smaller numbers than excavators, loaders, or dozers. Low population means fewer used units in circulation, fewer owners posting on general equipment forums, and no dedicated community built up around the model. This is expected for the category rather than a sign of unusual reliability problems.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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