Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC50UU-1(S/N 1001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC50UU-1(S/N 1001-UP) is a 5-ton class zero-tail-swing (ultra-tight-swing) hydraulic mini excavator, built to dig in confined spaces where a standard counterweight swing radius won't fit. It runs the Komatsu 3D95S-W-1, a mechanically governed, naturally aspirated, water-cooled three-cylinder diesel of about 2.02 L displacement rated around 28.7 kW (38.5 hp) at 2,500 rpm, with no electronic engine controls. Operating weight runs about 5,180 to 5,200 kg (11,420 to 11,460 lb) in standard trim, and the chassis was offered on both steel-shoe and rubber-track undercarriages. Komatsu built this generation from roughly the mid-1980s into the early 1990s on a chassis developed from the PC40 platform, with either an open ROPS canopy or an enclosed cab, and with either a standard boom or the two-piece offset "knuckle" boom that lets the front end swing sideways for digging tight against walls or in narrow trenches. This serial range starts at 1001 and runs up into the low five-figure range before Komatsu's next PC50UU generation took over.
The PC50UU-1 was Komatsu's first entry in the minimal-swing-radius mini excavator category that several Japanese builders raced to develop through the early-to-mid 1980s, and it earned a Good Design Award recognition in Japan for packaging the swing frame and counterweight inside the track width without giving up digging performance. Later PC50UU generations carried the zero-tail-swing concept forward with different engines and refined hydraulics, and Komatsu's minimal-radius mini excavator line continued for decades afterward under later model names. In today's used and parts market, the PC50UU-1 still earns its keep with contractors who need genuine tight-radius access in alleys, basements, and utility trenches. Its mechanically governed, pre-electronic driveline appeals to owner-operators who want a machine with no controller or sensors to chase, and buyers shopping this generation focus closely on slew bearing play and final drive condition, since those are the costliest wear items to inherit on a machine of this age.
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 PC50UU-1(S/N 1001-UP) specifications
Engine
| Engine model | Komatsu 3D95S-W-1 diesel (Yanmar-built block), 3-cylinder inline, naturally aspirated, water-cooled. One engine specification runs across the full S/N 1001-UP production span. |
| Rated power | 28.7 kW (38.5 HP) gross at 2,500 rpm |
| Displacement | 2.02 L (123.3 cu in) |
| Bore x stroke | 95 x 95 mm |
| Emissions tier | Predates nonroad diesel emissions tier regulation; no tier certification applies to an engine of this era. |
Weights
| Operating weight | 5,180-5,200 kg (11,420-11,460 lb), standard configuration with bucket and full fluids |
| Transport/shipping weight | approx. 5,100 kg (11,240 lb) |
| Ground pressure | 0.30-0.32 kg/cm² (4.3-4.6 psi) on standard 400 mm rubber shoes |
Dimensions
| Transport length | 5.95 m (19'6") |
| Transport width | 2.00 m (6'7") |
| Transport height | 2.42 m (7'11") |
| Tail swing radius | 0.99 m (3'3"); minimal rear-swing-radius layout with near-zero counterweight overhang |
| Track shoe width | 400 mm (15.7 in), standard rubber shoe |
Performance
| Max dig depth | 3.8 m (12'6") |
| Max reach (horizontal) | 5.47 m (17'11") |
| Swing speed | 9.0-9.5 rpm |
| Travel speed | Two-range travel: low 1.7 km/h (1.1 mph), high 3.2 km/h (2.0 mph). A single top speed near 4.5 km/h (2.8 mph) also appears in some listings. |
| Gradeability | 30 deg (approx. 58%) |
Forces
| Bucket digging force | approx. 34.3-35.3 kN (7,700-7,900 lbf) |
Service capacities (summary)
| Fuel tank | 56 L (14.8 US gal) |
| Hydraulic system | 70 L (18.5 US gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC50UU-1(S/N 1001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not published for this exact serial range in accessible sources — verify fill quantity with your Komatsu dealer or the OMM before service. | Straight SAE 30 non-detergent diesel engine oil per the OMM for this generation of PC50UU-1 (3D95S-W-1 engine). No multigrade or detergent oil specified on this early build. Modern cross-reference: Komatsu genuine engine oil (EO series) or an equivalent API CD/CE-rated non-detergent SAE 30. |
| Cooling system | Not published for this exact serial range in accessible sources. | Ethylene-glycol-based antifreeze coolant — Komatsu genuine coolant or an equivalent, mixed to suit climate for freeze protection. |
| Fuel tank | 56 L (14.8 US gal) | No. 2 diesel fuel. Use a winter-grade or blended fuel in cold climates per normal diesel cold-weather practice. |
| Hydraulic system, total (tank + circuit) | 70 L (18.5 US gal) total system fill. Tank-only refill volume is not separately published for this serial range. | Anti-wear hydraulic oil, ISO VG 46 equivalent — Komatsu genuine hydraulic oil (HO series) or an equivalent AW 46. A lower-viscosity grade may apply in cold climates; climate-specific guidance is not documented for this exact serial range — confirm with your dealer. |
| Final drive (each side) | Not published for this exact serial range — fill to level with the check/fill plug. | Straight SAE 30 non-detergent motor oil per the OMM. Komatsu specified engine oil, not gear oil, in the final drives on this generation of compact excavator. |
| Swing drive | Not published for this exact serial range in accessible sources. | Straight SAE 30 non-detergent motor oil per the OMM, carried in its own reservoir separate from the final drives. |
| Grease points (pins, bushings, linkages) | N/A — service item, not a fill capacity. | Lithium-based EP grease, NLGI 2 — Komatsu genuine multipurpose grease or an equivalent. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC50UU-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 PC50UU-1(S/N 1001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
The 3D95S-W-1 diesel is mechanically governed with no ECM, so predictive care relies on gauge trends, not scan-tool codes. Track the oil-pressure lamp and water-temperature gauge over time. Swing or travel that weakens as hydraulic oil warms flags a clogging suction strainer or tiring gear pump, not a valve fault; catch it by comparing warm-versus-cold performance. Since factory fill capacities aren't published for this serial range, run periodic oil sampling on the engine, final drives, and swing drive instead of relying on the calendar alone.
Corrective & Common Repairs
Fuel starvation, not bad injectors, causes most no-restart complaints; check the fuel filter and lines first, since a full injector set is costly to replace. A single function that won't move usually traces to a clogged pilot screen or banjo fitting, not a failed valve spool. Lopsided or weak travel often points to a worn final drive; replace both final drive motors together, since mixing a worn original with a fresh unit makes the machine pull when tracking straight. Flat-spotted or bent idlers usually trace to over-tensioned rubber tracks.
Overhaul & Rebuild Points
At this age, the slew/swing bearing is the highest-cost overhaul item; rock the house through its play before assuming it's fine. The factory final drive is a planetary travel unit prone to wear after decades of service; rebuild or replace both sides together. If swing turns freely one direction but not the other after valve-bank pressure and relief settings check out, the swing motor itself typically needs rebuilding. A worn injection pump and full injector set are common high-hour engine overhaul items once starting and idle quality degrade.
Seasonal & Environment Servicing
Cold starts depend on the glow-plug preheat circuit since there's no electronic assist; confirm the preheat lamp lights and clears before cranking, and check the fuse and relay if it misbehaves in winter. In hot or dusty conditions, keep radiator fins clear and coolant topped up; a clogged radiator or slipping fan belt commonly trips the water-temperature gauge into the red. Muddy or wet trenching sites pack the pilot circuit's small screens and banjo fittings with debris faster; clean them proactively before a function quits.
PC50UU-1(S/N 1001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 20S-98-12230 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 07000-02080 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 600-211-6570 | Plate? Caution,Oil Filter And Bypass Filter | Lubrication service | Check fitment → |
| 08036-01414 | Clip,(For Add.Filter)(Except Japan) | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC50UU-1(S/N 1001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Oil Pressure Warning Lamp (red, oil-can symbol) | Engine lubrication pressure has dropped below the safe minimum. | Low engine oil level, a clogged oil strainer or filter, a worn oil pump, or wrong oil viscosity. | Stop the engine immediately. Check oil level and filter condition before restarting. |
| Charge Warning Lamp (red, battery symbol) | Alternator is not charging the battery. | Loose or broken fan/alternator belt, a failed alternator, or a loose wiring connection. | Check belt tension and wiring. Shut down and inspect the charging circuit if the lamp stays on after start-up. |
| Water Temperature Gauge - red zone | Engine coolant temperature has reached or exceeded the safe operating range. | Low coolant level, debris-clogged radiator fins, a worn or slipping fan belt, or a stuck thermostat. | Idle the engine, let it cool, then check coolant level and radiator for blockage before resuming work. |
| Fuel Gauge - Empty/Low | Fuel tank level is near empty. | Normal fuel consumption; running the tank dry draws air into the mechanical injection pump. | Refuel with clean diesel. If the engine was run dry, bleed air from the fuel system before restart. |
| Glow (Preheat) Indicator Lamp | Glow plugs are energized for cold-start assist. | Normal cold-start cycle; a lamp that never lights or won't go out points to a glow-plug or preheat-relay circuit fault. | Wait for the lamp to go out before cranking in cold weather. If it misbehaves, check the preheat fuse, relay, and glow plugs. |
| Warning Buzzer (intermittent) | Audible alert accompanying the oil-pressure or water-temperature lamp. | Same trigger as the paired lamp - low oil pressure or engine overheating. | Stop work, shut the engine down, and check the paired gauge/lamp before continuing. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC50UU-1(S/N 1001-UP) attachments & work tools
Buckets
General-purpose bucket for this class runs about 0.04 m3 (1.4 cu ft) at roughly 300mm (12in) width; field-fit replacement buckets commonly span 300-900mm (12-36in) depending on digging vs. grading duty, varies by supplier. All mount pin-on (this era carrier has no factory quick-coupler) on 45mm pins with 170mm ear width and a 230mm pin-to-pin span, shared with the PC40/PC45/PC55 mini-excavator family.
Hydraulic hammers
At roughly 5.0-5.2 tonnes (11,100-11,400 lb) operating weight, this carrier sits in the compact/mini breaker bracket alongside other 4-6 tonne machines, generally matched to a breaker in the 100-150 kg operating-weight range with a proportionate chisel size, varies by brand and configuration. Breaker duty needs a dedicated auxiliary hydraulic circuit, which this machine does not carry from the factory.
Quick couplers
No factory quick coupler on the PC50UU-1 as built; buckets and attachments mount pin-on. Used units of this model are commonly seen fitted with an aftermarket manual (pin-grabber/wedge) or hydraulic quick coupler sized to the 45mm pin / 170mm ear bucket mounting.
Thumbs/grapples
Hydraulic thumb kits are a common retrofit on this model. Because it lacks a factory auxiliary circuit, owners typically add a diverter valve and route thumb-cylinder plumbing off the existing boom-offset cylinder lines, or install a full aux kit, to power a thumb or grapple.
Rippers
Single-tooth ripper attachments sized for roughly 3.9-5.5 tonne excavators fit this machine's mounting and pin class, used for scoring hardpan or frozen ground ahead of the bucket.
Hydraulic-kit notes
As built, the PC50UU-1 has no factory auxiliary hydraulic circuit for breakers, thumbs, or grapples. Fitting any of these tools requires adding an aftermarket auxiliary kit (control valve, foot pedal, plumbing) or tapping the boom-offset cylinder circuit through a diverter valve; confirm available pressure and flow with a hydraulic shop before sizing a tool.
All PC50UU-1(S/N 1001-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC50UU-1(S/N 1001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
3d95s-W-1d Engine S/N 12209-Up
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Air Cleaner
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 09***61 | Plate? Instruction,(French-English) | 1 |
| 09***61 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Air Intake Manifold And Connection
| 01***50 | Bolt,(With Corrosion Resistor) | 4 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 2 |
| 01***60 | Screw | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Air Intake Manifold And Connection (With Dust Indicator)
| 01***50 | Bolt,(With Corrosion Resistor) | 4 |
| 01***55 | Bolt,(With Engine Stop Motor Type) | 2 |
| 01***60 | Screw | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Alternator (35a)
| 60***40 | Alternator A. (35a),(35a) | 1 |
| ND***01 | Bushing,Insulate | 1 |
| ND***00 | Pulley | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Alternator And Mounting (35a)
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***45 | Bolt | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***00 | Camshaft Ass'Y | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***10 | Pulley?Non Hardening,Crank | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Cylinder Block
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Cylinder Head
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 13 |
| 02***04 | Plug, Pipe | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Cylinder Head Cover
| 61***20 | Screw | 2 |
| 61***30 | Washer,(B) | 2 |
| 61***42 | Packing,Cylinder Head Cover | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Exhaust Manifold
| 01***25 | Stud | 3 |
| 01***25 | Bolt - Relay Mounting | 6 |
| 62***10 | Manifold,Exhaust | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Flywheel And Flywheel Housing
| 01***40 | Bolt | 6 |
| 01***35 | Bolt | 1 |
| 01***40 | Bolt,Reamer | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Front Cover And Gear
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
| 01***20 | Bolt,(With Tachometer Outlet) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Filter And Piping(#12209-14048)
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 07***67 | Clamp, Hose | 4 |
| 07***03 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Filter And Piping(#14049-)
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Injection Pump (Feed Pump)
| YM***00 | Feed Pump Ass'Y | 1 |
| YM***50 | Gasket,(Square Type) | 1 |
| YM***20 | O-Ring,(Round Type) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Injection Pump (Governor)
| YM***30 | Label, Fuel Pump; Was Ym171353-51930, Label,Fuel Pump | 1 |
| YM***10 | Pin,Stop Lever | 1 |
| YM***90 | Shaft,Governor Lever | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Injection Pump (Pump)
| 62***10 | Injection Pump Ass'Y | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***70 | Retainer, Spring | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Injection Pump And Piping
| 01***25 | Stud | 3 |
| 01***06 | Nut | 3 |
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Fuel Nozzle And Spill Pipe
| 07***10 | Tube,(See Fig.0421-14) | 2 |
| 07***28 | Tube,Spill | 1 |
| 08***10 | Clip,(With Corrosion Resistor) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Gasket Kit
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***40 | O-Ring,Water Pump Mount | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Heater Signal? Relay? Timer
| 60***90 | Signal,Heater | 1 |
| 60***20 | Timer,Safety | 1 |
| 60***30 | Relay | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Lubricating Oil Filter
| 60***30 | Cartridge | 1 |
| 60***20 | Plate? Caution,(Italian-English) | 1 |
| 60***70 | Plate? Caution,Oil Filter And Bypass Filter | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Lubricating Oil Pump And Suction Pipe
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 5 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Muffler And Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***06 | Nut | 4 |
| 01***16 | Washer,(For Shipping Parts) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Oil Pan(#12209-16858)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***16 | Screw | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Oil Pan(#16859-18305)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 62***11 | Pan,Oil | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Oil Pan(#18306-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 62***11 | Pan,Oil | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Piston And Connecting Rod
| 04***12 | Ring, Snap | 6 |
| 62***21 | Piston (S) | 3 |
| 62***21 | Piston (S) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Rocker Arm
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 4 |
| 61***30 | Nut | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Starting Motor (2.0kw)
| 60***50 | Starting Motor A.,(2.0kw) | 1 |
| ND***20 | Starter Kit | 1 |
| ND***60 | Bearing,Ball | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Starting Motor And Mounting (2.0kw)
| 01***25 | Stud | 1 |
| 01***35 | Screw | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : 3d95s-W-1d Engine S/N 12209-Up : Water Pump And Cooling Fan
| 01***16 | Screw | 5 |
| 01***20 | Screw | 6 |
| 01***40 | Screw | 3 |
Control System And Revolving Frame
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage (1/2) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 1 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage (2/2) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage (6 Way Shift Pattern Spec.)(#3401-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage(#1001-3400)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage(#3401-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Boom Offset Control Pedal And Linkage
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Boom Offset Control Pedal And Linkage (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Boom Offset Control Pedal And Linkage (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Foot Rest (For Short Reach Spec.)(#4335-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 20***13 | Cover | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Fuel Control Lever And Linkage (1/2)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Fuel Control Lever And Linkage (2/2)
| 01***03 | Nut, L. H. Thread | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 1 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Increased Boom Speed Linkage (6 Way Shift Pattern Spec.)(#3401-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 1 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Increased Boom Speed Linkage(#3401-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 1 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Revolving Frame
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Revolving Frame (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Revolving Frame (For Short Reach Spec.)(#4335-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 28 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage (6 Way Shift Pattern Spec.)(#3401-)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage (For Short Reach Spec.)(#4335-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage(#1001-3400)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Speed Pedal And Linkage (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Speed Pedal And Linkage (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Speed Pedal And Linkage(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Travel Speed Pedal And Linkage(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Arm And Swing) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Arm And Swing) (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Arm And Swing) (For Short Reach Spec.)(#4335-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Arm And Swing)(#1001-3400)
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Arm And Swing)(#3401-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Boom And Bucket) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Boom And Bucket) (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Boom And Bucket)(#1001-3400)
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 7 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Boom And Bucket)(#3401-)
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 7 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Arm And Swing) (For Short Reach Spec.)(#4335-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Arm And Swing)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Arm And Swing)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Arm) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Arm) (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Boom And Bucket)(#1001-3400)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***80 | Bolt | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Boom And Bucket)(#3401-)
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Boom) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***06 | Nut,L.H. Thread (For Russian) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Boom) (6 Way Shift Pattern Spec.)(#3401-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***06 | Nut,L.H. Thread (For Russian) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Bucket) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Bucket) (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 6 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Swing) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Control System And Revolving Frame : Work Equipment Control Linkage (Swing) (6 Way Shift Pattern Spec.)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 6 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
Engine Related Parts And Electrical System
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***09 | Clamp, Hose - At Water Pump | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Am Car Radio And Speaker
| 01***12 | Screw,(Additional Sun Visor) | 4 |
| 01***25 | Screw,(Except Japan) | 2 |
| 01***12 | Screw | 7 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Battery
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Boom Side) (For Short Reach Spec.)(#4335-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Boom Side)(#1001-3400)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Boom Side)(#3401-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Chassis Side)(#1001-3400)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***08 | Screw, Terminal | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Electrical System (Chassis Side)(#3401-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 5 |
| 01***10 | Screw,(For Lighter) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 16 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 6 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Exhaust Piping
| 01***30 | Bolt,(For Mechanical Governor) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Gauge Cluster
| 20***40 | Gauge Ass'Y,Cluster | 1 |
| 20***10 | Gauge Ass'Y,Cluster | 1 |
| KA***00 | Gauge,Water Temperature | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Cab)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***35 | Bolt | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Instrument Panel (For Canopy)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***35 | Bolt | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Radiator And Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Engine Related Parts And Electrical System : Radiator Reservoir Tank
| 01***25 | Bolt,(For Automatic) | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
| 07***37 | Clamp, Overflow Hose | 2 |
Guard
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Canopy(#1001-3400)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 8 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 10 |
| 01***30 | Bolt,(For Mechanical Governor) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Canopy(#3401-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 8 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 10 |
| 01***30 | Bolt,(For Mechanical Governor) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Car Heater
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 08***19 | Band,(Without Air Conditioner) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (1/2) (For Cab)(#1001-3400)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 12 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 15 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (1/2) (For Cab)(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 11 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (1/2)(#1001-3400)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 15 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (1/2)(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 11 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (2/2) (For Cab)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (2/2)(#1001-3400)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (2/2)(#3401-)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 11 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Floor Plate (For Short Reach Spec.)(#4335-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 11 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Machinery Compartment (1/2)(#1001-3400)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***12 | Washer,(With Body Positioner) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Machinery Compartment (1/2)(#3401-)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***12 | Washer,(With Body Positioner) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Machinery Compartment (2/2)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Machinery Compartment (2/2) (For Cab)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (1/7)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 8 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (2/7)
| 08***12 | Grommet,(Not Used For Cab Spec.) | 1 |
| 20***50 | Packing? 2.0mm | 5 |
| 20***60 | Retainer,R.H | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (3/7)
| 01***08 | Screw | 4 |
| 20***70 | Retainer | 2 |
| 20***50 | Packing | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (4/7)
| 01***10 | Bolt,For Additional Rear Lamp | 3 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 3 |
| 01***10 | Screw,(For Lighter) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (5/7)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***12 | Screw,(Additional Sun Visor) | 2 |
| 01***30 | Screw,Lock | 14 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (6/7)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***10 | Screw,(With Air Conditioner) | 2 |
| 01***10 | Screw | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab (7/7)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 1 |
| 01***10 | Screw,(For Lighter) | 2 |
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Cab Mount
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 13 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Seat(#1001-3400)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 10 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Operator'S Seat(#3401-)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***25 | Bolt,Without Revolution Sensor | 10 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Guard : Wind Washer
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***16 | Screw | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
Mark Plate? Tool And Kit
Komatsu : Pc50uu-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Accessory Parts
| 09***13 | Bag,Tool (D31s) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Marks And Plates (English)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Lock Lever (With Lock Pin) | 1 |
| 09***00 | Plate? Safety,Starting And After Operating | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Spare Parts (Except Japan)
| 07***40 | O-Ring,(F2310-52a1 -12 ) | 1 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Mark Plate? Tool And Kit : Tool
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Swing System
Komatsu : Pc50uu-1(S/N 1001-Up) : Swing System : Sprocket
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 18 |
| 01***45 | Bolt, Mount Center Hinge Retainer (Upper) | 18 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 18 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Swing System : Swing Circle
| 01***80 | Bolt,(For Adjustable Rod) | 46 |
| 04***38 | Pin, Dowel | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Swing System : Swing Machinery
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***00 | Bolt, Tube | 10 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Under Carriage
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Front Idler
| 01***45 | Capscrew - M10 X 1.25 | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Recoil Spring
| 01***16 | Bolt (With Air Heater & Conditioner) | 8 |
| 01***60 | Bolt, Tube To Oil Cooler | 8 |
| 01***70 | Bolt, Accumulator Mounting Bracket | 8 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Rubber Shoe
| 20***20 | Shoe,Rubber | 2 |
| 20***10 | Shoe,Rubber | 2 |
| 20***21 | Shoe,Rubber | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Frame (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***55 | Bolt, Mount Lh Bracket | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Frame (For Rubber Shoe)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 8 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Frame (For Short Reach Spec.)(#4335-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***95 | Bolt,(For 2nd Travel Speed) (Op) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Frame(#1001-3400)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***95 | Bolt,(For 2nd Travel Speed) (Op) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Frame(#3401-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***95 | Bolt,(For 2nd Travel Speed) (Op) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Roller (For Rubber Shoe)
| 01***35 | Bolt, Hydraulic Tank Mounting | 20 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 20 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Roller (For Short Reach Spec.) (Swamp Shoe)(#4335-)
| 01***35 | Bolt, Hydraulic Tank Mounting | 20 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 20 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Roller(#1001-2312)
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 40 |
| 01***40 | Bolt,R.H. Outside And L.H. Inside, Bolt | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 48 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Roller(#2313-)
| 01***35 | Bolt, Hydraulic Tank Mounting | 20 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 20 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Shoe (For Short Reach Spec.) (Swamp Type) (Bolt On Type)(#4335-)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 20***00 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 20***10 | Bolt? Shoe (Kit) | 346 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Shoe(#1001-2141)
| 20***15 | Track Shoe Ass'Y | 1 |
| 20***16 | Track Shoe Ass'Y | 1 |
| 20***18 | Track Shoe Ass'Y | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Under Carriage : Track Shoe(#2142-)
| 01***18 | Nut? Shoe (Kit) | 346 |
| 20***00 | Shoe Bolt And Nut K.,(Except Swamp) | 1 |
| 20***10 | Bolt? Shoe (Kit) | 346 |
Work Equipment
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Arm
| 01***35 | Bolt, Hydraulic Tank Mounting | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Arm (For Short Reach Spec.)(#4335-)
| 01***35 | Bolt, Hydraulic Tank Mounting | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
| 07***45 | Seal,Dust? Cylinder | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Arm Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Arm Cylinder (For Short Reach Spec.)(#4335-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***50 | Capscrew | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Blade (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 3 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 14 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Blade Cylinder
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Blade Frame (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 5 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 5 |
| 04***55 | Ring,Snap | 8 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Blade(#1001-3400)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Blade(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom (1/2)? 1st(#1001-3400)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom (1/2)? 1st(#3401-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom (2/2)? 2nd And 3rd
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom (For Short Reach Spec.)(#4335-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom Cylinder (For Short Reach Spec.)(#4335-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Boom Offset Cylinder
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***09 | Nut,(With Body Positioner) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket 0.05m3 (Mini 0.08m3) Width 300mm
| 02***60 | Bolt (Op) | 2 |
| 02***15 | Nut (Op) | 2 |
| 20***10 | Shim Ass'Y | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket 0.12m3 (Mini 0.13m3) Width 480mm
| 10***40 | Tooth | 1 |
| 11***60 | Bolt | 2 |
| 11***80 | Nut | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket 0.20m3 (Mini 0.32m3) Width 650mm(#1001-3400)
| 02***60 | Bolt (Op) | 2 |
| 02***15 | Nut (Op) | 2 |
| 20***10 | Shim Ass'Y | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket 0.20m3 (Mini 0.32m3) Width 680mm(#3401-)
| 10***40 | Tooth | 1 |
| 11***60 | Bolt | 2 |
| 11***80 | Nut | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket 0.2m3 (Mini 0.32m3) Width 700mm
| 01***62 | Bolt | 6 |
| 01***28 | Nut (Std) | 6 |
| 02***60 | Bolt (Op) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket Cylinder Cover (For Short Reach Spec.)(#4335-)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 4 |
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket Link
| 01***10 | Bolt,(Noise Suppression Spec.) | 4 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Bucket Link (For Short Reach Spec.)(#4335-)
| 01***10 | Bolt,(Noise Suppression Spec.) | 4 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Heavy Duty Bucket 0.18m3 (Mini 0.28m3) Width 658mm
| 01***65 | Bolt | 6 |
| 01***28 | Nut (Std) | 6 |
| 10***40 | Tooth | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Arm Cylinder Line) (For Short Reach Spec.)(#4335-)
| 07***06 | Hose | 2 |
| 20***20 | Tube | 1 |
| 20***90 | Tube | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Arm Cylinder Line) (Hoe Side)(#1001-3400)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 10 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Arm Cylinder Line) (Hoe Side)(#3401-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***50 | Bolt,(With Service Valve R.H.) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Blade Cylinder Line) (Attachment Side)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***09 | Hose | 1 |
| 07***12 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Blade Cylinder Line) (Attachment Side)(#3401-)
| 04***10 | Ring, Retaining | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Blade Cylinder Line) (Blade Side) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 04***10 | Ring, Retaining | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Boom Cylinder Line) (6 Way Shift Pattern Spec.)(#1001-3400)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
| 07***08 | Hose | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Boom Cylinder Line) (Hoe Side)(#1001-3400)
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Boom Cylinder Line) (Hoe Side)(#3401-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 07***08 | Hose | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (For Short Reach Spec.)(#4335-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (Hoe Side)(#1001-3400)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (Hoe Side)(#3401-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Offset Cylinder Line) (Hoe Side)(#1001-3400)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Offset Cylinder Line) (Hoe Side)(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***12 | Hose | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Hydraulic Piping (Tilt Cylinder Line) (Blade Side) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment : Tilt Cylinder (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 04***25 | Ring,Snap (Kit) | 4 |
Work Equipment Control System
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 3-Spool Valve (1/2) (Swing? Travel Speed? Blade)
| 01***10 | Bolt | 6 |
| 01***16 | Bolt (Op) | 6 |
| 01***20 | Bolt (Itl) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 3-Spool Valve (2/2) (Swing? Travel Speed? Blade)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 4-Spool Valve (1/2) (Swing? Travel? Boom? Blade? Attachment)(#3401-)
| 01***10 | Bolt | 8 |
| 01***16 | Bolt (Op) | 8 |
| 01***20 | Bolt (Itl) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 4-Spool Valve (2/2) (Swing? Travel? Boom? Blade? Attachment)(#3401-)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 6-Spool Valve (1/3) (Arm? Travel? Bucket? Boom? Offset)
| 01***10 | Bolt | 12 |
| 01***16 | Bolt (Op) | 12 |
| 01***20 | Bolt (Itl) | 6 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 6-Spool Valve (2/3) (Arm? Travel? Bucket? Boom? Offset)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : 6-Spool Valve (3/3) (Arm? Travel? Bucket? Boom? Offset)
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 70***70 | Spring | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic And Fuel Tank
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (1/2) (Blade Cylinder Line) (Chassis Side) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (2/2) (Blade Cylinder Line) (Chassis Side) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line) (Chassis Side) (6 Way Shift Pattern Spec.)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***14 | Hose,(Pll) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line) (Chassis Side)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***14 | Hose,(Pll) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line) (Chassis Side)(#3401-)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***28 | Hose | 1 |
| 07***30 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line) (For Short Reach Spec.)(#4335-)
| 01***65 | Bolt,(Except Japan) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Blade Cylinder Line) (Chassis Side)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Blade Cylinder Line) (For Short Reach Spec.)(#4335-)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 4 |
| 04***64 | Pin,Snap (10m) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Chassis Side) (6 Way Shift Pattern Spec.)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 3 |
| 07***08 | Hose Assembly | 2 |
| 20***40 | Cover,(For 2nd Travel Speed) (Op) | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Chassis Side)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 3 |
| 20***40 | Cover,(For 2nd Travel Speed) (Op) | 2 |
| 20***70 | Elbow | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Chassis Side)(#3401-)
| 04***10 | Ring, Retaining | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line) (Chassis Side)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***12 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line) (Chassis Side)(#3401-)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***27 | Hose | 1 |
| 07***28 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line) (For Short Reach Spec.)(#4335-)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***27 | Hose | 1 |
| 07***28 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Offset Cylinder Line) (Chassis Side)(#1001-3400)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***11 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Offset Cylinder Line) (Chassis Side)(#3401-)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***26 | Hose | 1 |
| 07***27 | Hose | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Pump To Valve)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***35 | Bolt,(For Position Fixing) | 12 |
| 01***50 | Bolt,(For Strengthened Cover) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Pump To Valve) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***35 | Bolt,(For Position Fixing) | 12 |
| 01***50 | Bolt,(For Strengthened Cover) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Return)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***11 | Nut,(With Under Mirror) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Swing Motor Line)
| 01***40 | Bolt,(With Service Valve R.H.) | 2 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Pump)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Chassis Side)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 5 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 5 |
| 07***07 | Hose | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 18 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 18 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Track Side)(#1001-3400)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Track Side)(#3401-)
| 01***35 | Bolt,R.H. Outside And L.H. Inside | 18 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 18 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Pump (1/2)
| 20***00 | Pump Ass'Y | 1 |
| KB***09 | Gear Ass'Y,Center | 1 |
| KB***60 | Gear Ass'Y,Front | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Hydraulic Pump (2/2)
| KB***61 | Gear Ass'Y,Rear | 1 |
| KB***01 | Plate,With Coupling | 1 |
| KB***50 | Washer,Spring | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Swing Motor
| 20***10 | Swing Motor Ass'Y | 1 |
| ST***12 | Plug Ass'Y | 2 |
| ST***08 | O-Ring | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Swivel Joint
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Swivel Joint (For Power Tilt Mechanical Angle Dozer)(#3401-)
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 04***25 | Ring, Retaining | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Travel Motor (1/2)(#1001-4391)
| 01***20 | Bolt, Mount Spool Covers | 6 |
| 06***01 | Bearing,Ball | 1 |
| 06***03 | Bearing,Ball | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Travel Motor (1/2)(#4392-)
| 01***20 | Bolt, Mount Spool Covers | 6 |
| 04***93 | Ball,Steel | 2 |
| 06***01 | Bearing,Ball | 1 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Travel Motor (2/2)(#1001-4391)
| 04***10 | Ring,Snap | 1 |
| 04***12 | Ring, Retaining | 3 |
| 04***18 | Ring,Snap (Itl) | 3 |
Komatsu : Pc50uu-1(S/N 1001-Up) : Work Equipment Control System : Travel Motor (2/2)(#4392-)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 04***12 | Ring, Retaining | 3 |
| 07***07 | O-Ring - (K10) | 2 |
PC50UU-1(S/N 1001-UP) serial number reference
The PIN/serial plate on this era of mini excavator is riveted to the machine frame near the front of the upper structure, or in some cases to the cab -- outside behind the door, or inside the door on the earliest units -- since Komatsu did not consistently stamp the frame itself on machines this old. Read the plate's serial number as a plain sequence number (e.g. 1001, 1002, ...); there is no letter prefix to decode on this generation. Compare the number directly against the model's published S/N break (1001-UP) to confirm the machine falls in the PC50UU-1 family rather than a later PC50UU generation.
| Prefix | Identifies | Notes |
|---|---|---|
| 1001 | PC50UU-1 (S/N 1001-UP), all undercarriage/engine configurations | This generation used a plain numeric production serial with no alpha prefix; the machine is identified purely by the S/N break starting at 1001. The run covers both steel-shoe and rubber-track undercarriage builds sold under the same parts book, fitted with the 3D95S-W-1 three-cylinder diesel (about 28.7 kW / 38.5 hp, Yanmar-built). Factory-era literature places this range in roughly the mid-1980s to early 1990s (confirm exact year with your dealer using the full PIN) -- treat the year as approximate, single-source. Production ran up to roughly serial 10834 before the line was superseded by the next PC50UU generation; anything numbered higher is not this family. |
Frequently asked questions
What engine does the Komatsu PC50UU-1(S/N 1001-UP) use?
It uses the Komatsu 3D95S-W-1, a mechanically governed, naturally aspirated three-cylinder diesel of about 2.02 L displacement, rated around 28.7 kW (38.5 hp) at 2,500 rpm. The engine has no electronic controls or fault-code system; warnings run through analog gauges and lamps only.
What is the operating weight of the PC50UU-1(S/N 1001-UP)?
Standard operating weight runs about 5,180 to 5,200 kg (roughly 11,420 to 11,460 lb) with a full bucket and fluids. Actual weight varies slightly by undercarriage type (steel shoe versus rubber track), cab versus canopy, and attachment fit.
What replaced the Komatsu PC50UU-1(S/N 1001-UP)?
Komatsu's PC50UU-2 (S/N 8001-UP) succeeded this generation, followed by a CE-spec PC50UU-2E (S/N 10835-UP) built for European markets. Sources don't agree precisely on where PC50UU-1 production stopped relative to that changeover, so confirm the exact cutover against your machine's PIN if it matters for parts sourcing. Komatsu carried the zero-tail-swing concept this model pioneered forward into its later minimal-radius mini excavator line.
What PC50UU-1(S/N 1001-UP) owners discuss
What engine does the PC50UU-1 (S/N 1001-UP) run, and what's the community consensus on quirks?
This serial range carries the 3-cylinder Yanmar/Komatsu 3D95S-W-1 indirect-injection diesel, roughly 38 hp (28 kW) class, 2.0 L displacement. It's a mechanically governed engine with no electronic controls. The known quirk: if it dies and only restarts (then dies again) unless you keep working a hand primer, that points to fuel starvation, not injectors - check the fuel filter and lines first. The primer lever sits on the injection pump, right side of the engine bay looking in from the rear, and gets used to bleed air after any fuel system work. Replacement injectors for the full set run into real money, so owners are advised to rule out a plugged filter or line before condemning them.
What hydraulic symptoms show up most often, and what's usually behind them?
A weak, slow swing and blade that gets worse as the oil warms up is a recurring complaint on older units, and it's frequently traced to a partially clogged suction strainer at the hydraulic tank outlet starving the pump, or to a tired multi-stage gear pump feeding the valve banks. If only one track or the blade works while other functions are dead and silent, that's the same flow-starvation pattern rather than one bad valve section. Boom or house swing that only turns one direction, even after crossing hoses at the swing motor, usually points to the swing relief or control valve section rather than the motor itself - once pressure and relief settings check out on the valve bank, a rebuilt or replacement swing motor is typically what resolves it.
Are there maintenance quirks specific to this machine's pilot/control circuit?
Yes. The pilot circuit uses small in-line screens at the pilot pump outlet, at the first valve inlet, and in the pilot lines running into the control valve, plus banjo-bolt fittings that can clog with debris over time. A single function that won't move at all (lever does nothing, no strain, no noise) is commonly a blocked pilot screen or banjo bolt rather than a failed valve spool or dead pump section. Pulling and cleaning these screens is a cheap first step before condemning bigger components.
What undercarriage wear patterns are typical for this UU-chassis mini excavator?
The ultra-tight-tail-swing PC50UU rides on a wide-guide undercarriage. Owners report idlers taking flat spots or bending, generally traced back to over-tensioned rubber tracks, and tracks that don't seat properly in the load rollers once tension or roller wear gets out of spec. Before fitting new rubber tracks, check sprocket tooth wear, idler condition, and roller wear, and replace rollers or track pads in matched pairs so wear stays even side to side.
What about final drive and travel complaints?
Slow or lopsided travel comes up repeatedly. One documented case measured roughly 3000 psi (about 207 bar) at the final drives - normal on paper - yet travel stayed weak, which pointed to pump flow or a worn final drive rather than a pressure problem alone. Other owners describe a final drive that locks up after roughly a quarter turn in either direction. The factory final drive on this range is the GM05-family planetary/travel unit; aftermarket replacements are common today. Because a worn original motor and a fresh aftermarket motor can turn at slightly different speeds, the consistent advice from owners is to replace both final drive motors together rather than one side at a time, otherwise the machine pulls when tracking straight.
What electrical or sensor issues come up, and how serious are they?
This is a pre-electronic, mechanically governed machine - no engine ECM and a simple wiring harness - so most "electrical" complaints are basic circuit faults, not sensor failures. Total loss of power at the key switch is usually traced to the battery disconnect switch or the wiring between the disconnect and the switch itself, not the switch. One owner's jumper cables arced when boosting a dead unit, consistent with reversed battery polarity during the jump. Reversed polarity during a jump-start can damage the alternator's diodes and other charging-system components - have your dealer verify the charging system before returning the machine to work if this happens.
What should I check before buying a used PC50UU-1 (S/N 1001-UP)?
Inspectors and owners point to the same checklist: look for leaks around the hydraulic pump compartment, hoses, cylinders, and the swing joint; rock the house through roughly a quarter turn to feel for play in the slew ring/swing bearing, one of the costliest items to replace on a machine this size; check bucket teeth for scalloping (half-moon wear), a sign of reduced digging force even when the bucket still looks usable; inspect the travel and control lever pivots, especially the right-side lever assembly, for stiffness from worn or dry linkages, corrosion, or dirt buildup; and if the hour meter reading looks questionable, cross-check pedal and lever wear against the claimed hours. Pull maintenance records if available and have a mechanic familiar with older Komatsu UU-series machines look it over before you commit.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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