Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC27MRX-1A(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC27MRX-1A(S/N 10001-UP) is a compact hydraulic excavator in Komatsu's roughly 3-tonne mini-excavator class, with a documented operating weight near 2,996 kg (6,605 lb) for this serial range. It is powered by a Komatsu 3D82AE-3, a naturally aspirated 3-cylinder mechanical diesel producing about 19 kW (25.5-25.7 hp), governed mechanically with no electronic engine controls. Built in the early-to-mid 2000s, it predates Komatsu's PC27MR-1/-2/-3 line (PC27MR-2 is documented circa 2004-2008), and its shop-manual family also covers the related PC30MRX-1, PC35MRX-1, PC40MRX-1, and PC45MRX-1, differing mainly by displacement and output within the same mechanical-diesel design. It was offered with canopy or enclosed-cab operator stations, a rubber-track undercarriage, and a standard dozer blade, consistent with the flexible-configuration approach Komatsu used across this compact excavator range.
Across the wider MRX/MR lineage that followed, Komatsu carried the same basic 3-cylinder architecture forward while updating emissions compliance, cab ergonomics, and boom/swing tuning through the MR-1, MR-2, and MR-3 generations; related derivatives of the same 3D82AE engine block also appear with different suffix tunes on sibling economy-class models. Operating weight and bucket capacity across this family vary by configuration (canopy vs. cab, blade, shoe width), typically in the high-2-tonne to mid-3-tonne band; treat any single figure as representative rather than exact for a given unit. In the used and parts market, the PC27MRX-1A is a niche but recognizable early-generation mini excavator: its pre-electronic, mechanically governed engine appeals to owners who want to avoid emissions-control complexity, and its final drives, travel motors, and undercarriage components are commonly cross-referenced against other machines in the PC27 family, keeping parts supply active despite the model's 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 PC27MRX-1A(S/N 10001-UP) specifications
Engine
| Engine model | Komatsu 3D82AE-3, 3-cylinder liquid-cooled diesel (Yanmar-built 3TNV82 platform) |
| Displacement | 1.331 L (81.2 cu in) |
| Gross power | 19.7 kW (26.4 hp) at 2,600 rpm |
| Net power | 19.1 kW (25.6 hp) |
| Emissions tier | Not documented for this exact serial range — early-production run predates widely cataloged emissions certification data for this model. |
Weights
| Operating weight | approx. 2,996 kg (6,605 lb), standard configuration |
| Ground pressure | Not documented for this exact serial range — verify with your dealer or the factory shop manual. |
| Transport weight | Not documented for this exact serial range. |
Dimensions
| Track shoe width | 300 mm (11.8 in), standard rubber track |
| Transport length/width/height | Not documented for this exact serial range. |
| Tail swing radius | Not documented for this exact serial range. |
| Ground clearance / undercarriage length | Not documented for this exact serial range. |
Performance
| Max dig depth, max reach, max dump height, max cutting height | Not documented in a verifiable, internally-consistent form for this exact serial range — figures found conflict with each other and likely reflect data-entry errors rather than factory values; verify with your dealer or the factory shop manual. |
| Swing speed, travel speed, gradeability, drawbar pull | Not documented for this exact serial range. |
Forces
| Bucket digging force | Not documented for this exact serial range in a verifiable form. |
| Stick/arm digging force | Not documented for this exact serial range. |
Service capacities (summary)
| Fuel tank, hydraulic system, engine oil, cooling system | Not documented for this exact serial range. Capacities published for the later PC27MR-2/PC27MR-3 successor generation exist but are not confirmed to apply to this earlier PC27MRX-1A build. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC27MRX-1A(S/N 10001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | approx. 5.3-5.7 L (1.4-1.5 US gal) | Komatsu Genuine engine oil (EO series) for the 3D82AE-3 diesel. SAE10W below roughly -15 to -20degC ambient; SAE10W-30 or 15W-40 (API CD/CE/CF-4 or JASO DH-1 grade) for temperate to tropical ambient up to 40degC. Change oil with every filter service. |
| Cooling system | approx. 3.4 L (0.9 US gal) | Komatsu Supercoolant AF-NAC, a pre-mixed ethylene-glycol permanent-type coolant with corrosion inhibitors. Select mix strength for the regional minimum ambient; do not blend coolant types. |
| Fuel tank | approx. 43.9-44.3 L (11.6-11.7 US gal) | Ultra-low-sulfur No. 2 diesel; switch to No. 1 diesel or a winter blend below freezing. Fill at end of shift to limit tank condensation. |
| Hydraulic system total | approx. 30-40 L (7.9-10.6 US gal) total system; varies by configuration/series | Komatsu Genuine super hydraulic oil HO46-HM (anti-wear type, ISO VG46 equivalent). Use the lighter Komatsu super hydraulic oil grade in cold-start regions below about -20degC. |
| Hydraulic tank | approx. 14 L (3.7 US gal) refill | Same Komatsu Genuine super hydraulic oil used for the system fill. Check level with the machine on level ground, engine off, and cylinders retracted. |
| Final drive (each) | not independently confirmed for this exact serial block; small oil-filled reduction case, service to the level-plug mark | Compact excavators in this class commonly run the same engine-oil grade used in the crankcase in the final drive case rather than a separate gear lube. Confirm against the machine's own lubrication chart or with a dealer before servicing. |
| Swing drive | not independently confirmed for this exact serial block; small oil-filled swing machinery reduction case, service to the level-plug mark | Compact excavators in this class commonly run the same engine-oil grade used in the crankcase in the swing machinery case. Confirm against the machine's own lubrication chart or with a dealer before servicing. |
| Grease (spec only) | applied at grease points per service interval, no reservoir capacity | Komatsu Genuine multipurpose grease, lithium-soap base, NLGI #2 EP. Use a molybdenum-disulfide-treated grease at work-equipment pin points if called out on the machine's own chart. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC27MRX-1A(S/N 10001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the PC27MRX-1A(S/N 10001-UP) beyond the schedule
Predictive maintenance & fluid analysis
The 3D82AE-3 is a mechanically governed diesel with no ECM or onboard diagnostics, so condition monitoring on this machine relies on scheduled fluid sampling rather than fault codes. Inspect drained engine oil at every oil change for metal fines, an early sign of piston, ring, or injection-pump wear. Sample hydraulic tank oil for water and particulate contamination at the 1000h and 2000h services, since this class runs a modest-capacity tank that concentrates contamination faster than larger excavators. Track final-drive oil condition the same way.
Corrective & common repairs
Common wear points on this generation are the final-drive travel motors and drive sprockets, frequent items in the used-parts market, plus swing-bracket pin and bushing wear at the boom mount from repeated digging cycles. Fuel-system air ingress is a recurring complaint: running the tank dry demands a full water-separator bleed before the 3D82AE-3 will restart cleanly. Because the engine uses a mechanical injection pump with no electronics, most driveability complaints trace to worn injectors, a clogged fuel filter, or a leaking water-separator seal rather than a control-system fault.
Overhaul & rebuild points
At rebuild, prioritize the final-drive and travel-motor assemblies and the swing machinery, both wear fastest on this compact undercarriage under repeated digging and travel cycles. On the engine side, a rebuild should recheck valve clearance and have injection nozzles tested and reset, since the mechanically governed 3D82AE-3 has no self-adjusting components to mask wear. Time hydraulic pump and cylinder reseal work to coincide with a full hydraulic-tank oil and strainer change, given the tank's modest capacity and this generation's age.
Seasonal & environment servicing
Cold-start reliability on the naturally aspirated 3-cylinder depends on correct-viscosity engine oil and a working cold-start aid; bleed the fuel system any time the machine runs out of fuel or sits idle over winter. In hot or dusty conditions, clean the radiator and oil-cooler fins ahead of the standard interval and service the air-cleaner element early to protect the engine from dust ingestion. Rubber-track undercarriages on this class should be checked for tension more often in freeze-thaw conditions, where packed debris accelerates roller and sprocket wear.
PC27MRX-1A(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| (YM129053-55620) | Fuel Filter Ass'Y,(See Fig.A4110-B0a3) | Fuel system service | Check fitment → |
| YM171051-92760 | Wrench,Fuel Filter? Water Separator | Fuel system service | Check fitment → |
| 20T-98-72410 | Plate? Caution,Engine Fuel Filter | Fuel system service | Check fitment → |
| 07000-02080 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC27MRX-1A(S/N 10001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Oil pressure warning lamp (red, oil can symbol) | Engine oil pressure has dropped below the safe minimum while running. | Low engine oil level, clogged oil filter, worn oil pump, or a failed oil pressure switch/sender. | Stop the engine immediately, check oil level and top off with the specified engine oil, and inspect for leaks before restart; if the lamp stays on with oil level correct, check the pressure switch and oil pump. |
| Charge warning lamp (red, battery symbol) | Alternator is not charging the battery. | Loose or broken fan/alternator belt, failed alternator, bad wiring connection, or discharged battery. | Stop and check belt tension and condition, inspect alternator wiring and connector, and test battery state of charge and alternator output. |
| Preheat (glow plug) indicator lamp (amber, coil symbol) | Glow plugs are energized for the cold-start preheat cycle; lamp is lit during warm-up and goes out when preheat is complete. | Normal operation on a cold start; if the lamp never lights or never goes out, points to a glow plug relay/timer fault or an open glow plug circuit. | Wait for the lamp to go out before cranking on a cold start; if it behaves abnormally, check the glow plug relay/timer and continuity of each glow plug. |
| Coolant temperature gauge in red zone | Engine coolant temperature has exceeded the normal operating range. | Low coolant level, debris-clogged radiator fins, slipping or broken fan belt, or a thermostat stuck closed. | Stop the engine, let it cool, check coolant level and radiator fins for debris, and inspect the fan belt and thermostat. |
| Hydraulic oil temperature gauge in red zone | Hydraulic oil temperature has exceeded the normal operating range. | Low hydraulic oil level, debris-clogged oil cooler fins, internal pump/valve leakage, or wrong oil viscosity for ambient conditions. | Stop and let the system cool, check hydraulic oil level and cooler fins for debris, and have relief pressures checked if overheating repeats. |
| Air cleaner restriction indicator | Air filter element restriction has reached the service limit. | Dirty or clogged air filter element, especially in dusty job-site conditions. | Inspect and clean or replace the air filter element, and check intake ducting for damage or leaks. |
| Fuel level gauge (low/empty) | Fuel tank level is low. | Normal depletion during operation; a faster-than-expected drop can point to a leak in the fuel lines or tank. | Refuel with the specified diesel fuel and inspect fuel lines and tank for leaks if consumption seems abnormal. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC27MRX-1A(S/N 10001-UP) attachments & work tools
Buckets
GP bucket capacity for this ~2.9-3.0 t class runs about 0.045-0.11 m³ heaped, with digging buckets commonly 300-600 mm (12-24 in) wide; narrow HD/rock buckets run down to about 230-300 mm (9-12 in), wide grading/cleanup buckets up to about 750 mm (30 in). Standard mount is pin-on with a 35 mm bucket pin; coupler mount is available as an option, see Quick couplers.
Hydraulic hammers
Breaker class for this weight bracket runs roughly 150-200 kg (330-440 lb) unit weight with about 500 ft-lb impact energy class, sitting at the top of most makers' smallest mini-excavator bracket or the bottom of their next size up - check the individual breaker maker's carrier-weight chart before ordering since brackets vary by brand. Mount pin-on through the bucket linkage and run off the machine's auxiliary hydraulic circuit.
Quick couplers
Manual pin-grabber/wedge-style couplers sized for 2-3 t mini excavators use 35 mm pins, matching this machine's bucket pin. Hydraulic (in-cab release) couplers are offered in the same pin range but are less common at this size class; most owners run buckets pin-on rather than through a coupler.
Thumbs/grapples
Hydraulic thumbs come weld-on (cylinder and thumb plate welded to the stick) or pin-on (thumb shares the bucket pin, cylinder pins to the stick); weld-on kits sized for roughly 2,700-4,000 kg (6,000-9,000 lb) operating weight cover this machine, and mechanical (non-hydraulic) thumbs also fit. Mechanical multi-finger rock grapples and rotating grabs are offered up to about 2.8-3 t - this machine sits at the top of that bracket, so confirm capacity with the grapple maker.
Rippers
No multi-shank dozer-style ripper applies at this size. Aftermarket single-shank ripper tooth/hook attachments, pinned through the bucket linkage, are built for 2-3.5 t mini excavators and are meant for root/stump removal and breaking hardpan rather than continuous ripping.
Hydraulic kit notes
Main hydraulic circuit on this MR-class chassis runs about 75 L/min (20 gal/min) pump flow at roughly 24.5 MPa (3,555 psi) relief pressure, figures typical for the size class - confirm against the exact PC27MRX-1A(S/N 10001-UP) circuit since flow can shift slightly by generation. Standard auxiliary plumbing is a single-acting (one-way) breaker circuit; a two-way (double-acting) circuit needed for hydraulic thumbs or rotating grapples is a factory/dealer-installed option, not standard. No high-flow circuit is offered in this weight class.
All PC27MRX-1A(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC27MRX-1A(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
3d82ae-3hc Engine S/N 04840-Up
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Air Cleaner And Mounting (Single Element)(#11582-)
| YM***90 | Gasket,(Not Shown) | 1 |
| YM***00 | Air Cleaner Ass'Y | 1 |
| YM***20 | Element,Outer | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Air Intake Manifold And Connection
| YM***02 | Screw | 2 |
| YM***52 | Screw | 6 |
| YM***00 | Heater,Intake Air | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Alternator (40a) (Inner Parts)(#11582-)
| YM***20 | Rear Bracket Ass'Y | 1 |
| YM***30 | Front Bracket Ass'Y | 1 |
| YM***00 | Rotor Ass'Y | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Alternator And Mounting (40a)(#11582-)
| YM***02 | Nut | 1 |
| YM***01 | Bolt | 1 |
| YM***40 | Screw | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Camshaft And Tappet(#09465-)
| YM***01 | Gear Ass'Y,Camshaft | 1 |
| YM***00 | Rod,Push | 6 |
| YM***50 | Bearing, Thrust | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Crankshaft(#11582-)
| YM***00 | Gear,Crank | 1 |
| YM***80 | Parallel Pin | 1 |
| YM***50 | Pulley,(For Variable Pump) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Cylinder Block
| YM***30 | Thrust Metal Ass'Y (Std) | 2 |
| YM***00 | Plug | 1 |
| YM***50 | Plug | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Cylinder Block Accsessory(#11582-)
| YM***00 | Gauge, Oil Level | 1 |
| YM***50 | Oil Pressure Transmitter | 1 |
| YM***20 | Plug,Drain(Without Oil Cooler Type) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Cylinder Head
| YM***80 | Retainer, Spring | 6 |
| YM***00 | Guide,Valve? Exhaust | 6 |
| YM***00 | Plug | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Cylinder Head Cover
| YM***20 | Cover, Breather | 1 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***70 | Splash-Guard | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Drive Gear(#11582-)
| YM***01 | Idler Gear Ass'Y,Idler | 1 |
| YM***52 | Screw | 2 |
| YM***20 | Bush,Idle Gear (Repair Part) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Electrical Parts (Forwerded Individually Parts)(#11582-)
| YM***00 | Relay Ass'Y,Safety | 1 |
| YM***20 | Timer,Solenoid | 1 |
| YM***10 | Relay,Stop Solenoid | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Exhaust Manifold(#16202-)
| YM***02 | Stud | 1 |
| YM***10 | Gasket,Exhaust Manifold | 1 |
| YM***00 | Manifold,Exhaust | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Flywheel And Flywheel Housing(#11582-)
| YM***50 | Oil Seal Case, Assembly | 1 |
| YM***80 | Seal? Rear | 1 |
| YM***02 | Screw | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Front Cover(#16202-)
| YM***02 | Bolt Plated | 2 |
| YM***51 | Cap, Lub. Oil Supply | 1 |
| YM***40 | O-Ring (Kit) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Front Hanger(#11582-)
| YM***00 | Hook,Front | 1 |
| YM***42 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Filter And Piping(#11582-)
| YM***70 | Union | 1 |
| YM***10 | Pipe | 1 |
| YM***02 | Bolt Plated | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Filter(#11582-)
| YM***40 | Lever | 1 |
| YM***00 | O-Ring (Kit) | 1 |
| YM***50 | Cartridge | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#16202-)
| YM***70 | Nut | 1 |
| YM***40 | Lever,Control | 1 |
| YM***30 | Spacer,Lever Shaft | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#16202-)
| YM***50 | Angleich Ass'Y | 1 |
| YM***00 | Washer,Spring | 1 |
| YM***40 | Link? L=30.5,L=30.5 (Mark 05) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#16202-)
| YM***50 | Kit, Shim | 1 |
| YM***10 | Flange | 1 |
| YM***10 | Plate? Caution | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#16202-)
| YM***70 | Retainer, Spring | 3 |
| YM***00 | Plunger W/Barrel | 3 |
| YM***02 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Injection Pump And Piping(#16202-)
| YM***20 | Retainer, Pipe | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***31 | Pipe | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Fuel Nozzle And Spill Hose(#16202-)
| YM***20 | Spring | 1 |
| YM***00 | Fuel Injection Nozzle, Assembly | 1 |
| YM***80 | Pipe | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Gasket Kit(#11582-)
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***40 | O-Ring (Kit) | 2 |
| YM***40 | O-Ring,Drain Plug | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Lubricating Oil Pump(#11582-)
| YM***30 | Bolt, Assembly | 1 |
| YM***02 | Seal,Ring (Kit) | 2 |
| YM***41 | Gasket (Kit) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Muffler(#11582-)
| YM***00 | Washer | 1 |
| YM***11 | Gasket,Muffler (Kit) | 1 |
| YM***90 | Clamp Ass'Y | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Oil Filter
| YM***50 | Nut | 1 |
| YM***00 | Valve,Relief | 1 |
| YM***02 | Bolt Plated | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Oil Pan(#11582-)
| YM***40 | Plug,Drain | 1 |
| YM***52 | Screw | 22 |
| YM***80 | O-Ring,Engine Oil Drain | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Piston And Connecting Rod
| YM***00 | Connecting Rod, Assembly | 3 |
| YM***80 | Piston, Assembly | 3 |
| YM***00 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Rear Hanger
| YM***00 | Hook,Front | 1 |
| YM***42 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Rocker Arm(#09465-)
| YM***02 | Screw | 6 |
| YM***80 | Spring | 3 |
| YM***40 | Rocker Shaft | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Starting Motor (1.2kw) (Inner Parts)(#11582-)
| YM***20 | Holder Ass'Y,Brush | 1 |
| YM***50 | Stopper Ass'Y | 1 |
| YM***20 | Pinion, Assembly | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Starting Motor And Mounting (1.2kw)(#11582-)
| YM***52 | Bolt Plated | 2 |
| YM***00 | Washer,Spring | 1 |
| (Y***0) | Starting Motor Ass'Y,(See Fig.A6210-B0a2a) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Tool
| YM***60 | Wrench,Fuel Filter? Water Separator | 1 |
| YM***50 | Screw Driver | 1 |
| YM***20 | Flex Horn (Option.) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : 3d82ae-3hc Engine S/N 04840-Up : Water Pump And Cooling Fan(#16202-)
| YM***22 | Screw | 2 |
| YM***20 | O-Ring,(Not Shown) | 1 |
| YM***90 | Pipe | 1 |
Accessory
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Accessory : Spare Parts
| 07***85 | O-Ring,(For Snow Removing) | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 07***34 | O-Ring (K10) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Accessory : Tool
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***00 | Nozzle,(For Rubber Shoe) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Accessory : Tool (Wrench)
| 09***06 | Wrench Set,8x10? 12x14? 13x17? | 1 |
| 09***00 | Wrench? 50 | 1 |
| 09***10 | Wrench? 8x10 | 1 |
Cooling System
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Cooling System : Drain Piping
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 07***29 | Clamp | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Cooling System : Radiator (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Cooling System : Radiator Piping
| 07***19 | Clamp, Hose | 4 |
| 21***20 | Hose | 1 |
| 21***30 | Hose | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Cooling System : Reserve Tank
| 07***15 | Clip | 2 |
| 20***50 | Clamp | 2 |
| 21***82 | Conduction | 1 |
Electrical System
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Electrical System : Battery And Mounting Parts (For Kuc)
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 4 |
| 20***20 | Battery (90d26l),Wet | 1 |
| 21***32 | Bracket | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Electrical System : Battery Wiring
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Electrical System : Engine Wiring (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***10 | Bolt - Relay And Flasher Mounting | 2 |
Engine Related Parts
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Engine Related Parts : Dumper
| 01***25 | Bolt,(Rear Attachment Less) | 3 |
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Engine Related Parts : Engine Mounting Parts
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 12 |
| 01***00 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Engine Related Parts : Engine Related Parts
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 3 |
| 01***06 | Nut | 2 |
Fuel Tank And Related Parts
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Fuel Tank And Related Parts : Drain Piping
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Fuel Tank And Related Parts : Fuel Gauge
| 01***14 | Screw | 5 |
| 01***10 | Bolt - Relay And Flasher Mounting | 3 |
| 08***10 | Connector, Clip | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Fuel Tank And Related Parts : Fuel Piping
| 01***16 | Screw | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 07***15 | Clip | 8 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Fuel Tank And Related Parts : Fuel Tank
| 07***45 | Strainer, Filler Tube | 1 |
| 07***85 | Clip | 2 |
| 20***60 | Float | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Fuel Tank And Related Parts : Fuel Tank Mounting Parts
| 21***20 | Band | 1 |
| 21***30 | Cushion | 2 |
| 21***51 | Cushion | 1 |
Guard
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Additional Counter Weight (For Kuc)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***75 | Bolt - Tube Mounting | 2 |
| 01***90 | Bolt | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Counter Weight (For Kuc)
| 01***00 | Capscrew | 3 |
| 01***60 | Flat Washer - M20 (Hardened) | 3 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Front Cover
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Hood (For Cab) (For Kuc)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Hood (For Canopy) (For Kuc)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Rear View Mirror (For Cab) (For Kuc)
| 01***30 | Screw | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 11***30 | Bolt | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Rear View Mirror (For Canopy) (For Kuc)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 22***10 | Support,R.H | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Side Cover (L.H.) (For Cab) (For Kuc)
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Side Cover (L.H.) (For Canopy) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Side Cover (R.H.) (For Cab) (For Kuc)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Guard : Side Cover (R.H.) (For Canopy) (For Kuc)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
Hydraulic System
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Actuator Line (Boom? Arm? Bucket? Boom Swing Cylinder Line) (For Kuc)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Actuator Line (Swing Motor Line) (For Kuc)
| 21***11 | Plate? A,A | 1 |
| 21***21 | Plate? B,B | 1 |
| 21***31 | Plate? C,C | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Actuator Line (Travel Motor And Blade Cylinder Line) (For Kuc)
| 08***36 | Tie, Cable | 3 |
| 20***70 | Sheet | 1 |
| 21***11 | Plate? A,A | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Attachment Line (Chassis Side) (2 Att) (For Kuc)
| 01***65 | Capscrew | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Delivery Line(#10951-)
| 01***50 | Bolt,(Spark Arrester Spec.) | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 07***15 | Clamp,(10m) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Drain Line
| 21***90 | Hose | 1 |
| 21***60 | Hose | 1 |
| 22***21 | Hose | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Hydraulic Tank (For Kuc)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***23 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Main Pump And Related Parts(#10951-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Return Line(#10951-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 07***59 | Clamp,See Fig. K4010-05a0 | 4 |
| 07***35 | Clamp | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Hydraulic System : Suction Line
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 07***55 | Clamp, Hose | 4 |
| 21***21 | Hose | 1 |
Main/Revolving Frame And Related Parts
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Main/Revolving Frame And Related Parts : Boom Swing Bracket (For Kuc)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***30 | Bolt,R.H | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Main/Revolving Frame And Related Parts : Boom Swing Cylinder And Foot Pin (For Kuc)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 04***12 | Lock,(With Rain Cap) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Main/Revolving Frame And Related Parts : Revolving Frame (For Kuc)
| 01***12 | Bolt - M8 - 1.25 X 12 | 1 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Main/Revolving Frame And Related Parts : Revolving Frame Lubrication Piping
| 07***00 | Fitting, Grease - Upper Hinge Pin | 3 |
| 08***36 | Band,(For 2nd Travel Speed) (Op) | 3 |
| 20***40 | Tube | 1 |
Marks And Plates
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Marks And Plates : Marks And Plates (For Additional Counter Weight) (Pc27mrx)
| 01***16 | Washer,(For 35a Alternator) | 2 |
| 21***60 | Screw | 2 |
| 22***10 | Plate | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Marks And Plates : Marks And Plates (For Cab) (English) (For Kuc)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 8 |
| 09***01 | Plate? Safety,Warning Before Ope.And Mainte | 1 |
| 09***01 | Plate? Safety,Hot Oil Hazard? Hydraulic. Tank Cap | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Marks And Plates : Marks And Plates (For Canopy) (English) (For Kuc)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 8 |
| 09***01 | Plate? Safety,Warning Before Ope.And Mainte | 2 |
| 09***01 | Plate? Safety,Hot Oil Hazard? Hydraulic. Tank Cap | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Marks And Plates : Plate (Iso Pattern Operating Plate) (English)
| 09***00 | Plate? Safety,Operating Pattern Table (Jis) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Marks And Plates : Plate (Lifting Capacity) (For Kuc)
| 22***30 | Plate,Std Arm | 1 |
| 22***40 | Plate,Long Arm | 1 |
Operator'S Compartment And Control System
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Attachment Control Pedal (2-Way)
| 01***70 | Bolt | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Blade Control Linkage And Cable (For Kuc)
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 1 |
| 04***10 | Pin, Cotter | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Boom Swing Pedal Linkage (For Kuc)
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***30 | Bolt,Stopper | 2 |
| 01***16 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Car Heater (For Kuc)
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 1 |
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***25 | Bolt - Relay Mounting | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : E.P.C. Valve And Related Parts (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Frame (Floor) (For Cab)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 9 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Frame (For Canopy) (For Attachment)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Frame (Pedal) (For Cab)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***08 | Washer | 1 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Mat (Cab Spec.)
| 22***22 | Mat,Floor | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Mat (Cab Spec.) (For Attachment)
| 22***20 | Mat,Floor | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Mat (Canopy Spec.) (For Attachment) (For Kuc)
| 22***30 | Mat,Floor | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Floor Mat (Canopy Spec.) (For Kuc)
| 22***40 | Mat,Floor | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Hand Rail (Tops)
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***90 | Capscrew | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Main Control Piping (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Main Control Related Parts (For Kuc)
| 01***16 | Bolt - Box Mounting | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***35 | Bolt,(For Fix Position) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Main Valve And Related Parts (For Kuc)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 13 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 17 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Main Valve Bracket (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 5 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (1/13) (Cab) (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 1 |
| 01***12 | Screw | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (10/13) (Radio) (For Kuc)
| 01***10 | Screw | 4 |
| 01***08 | Washer | 4 |
| 17***20 | Washer | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (11/13) (Window Washer) (For Kuc)
| 01***12 | Screw (2) | 2 |
| 20***20 | Nozzle Ass'Y | 1 |
| 20***70 | Hose | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (12/13) (Lamp) (For Kuc)
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
| 01***05 | Washer,(Without Window Washer) | 2 |
| 08***00 | Lamp,Room | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (13/13) (Handle) (For Kuc)
| 01***32 | Washer, (Without Emergency Steering) | 2 |
| 11***30 | Bolt | 2 |
| 20***21 | Grip | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (2/13) (Door 1/2) (For Kuc)
| 01***10 | Bolt,(With Auto Emergency Steering) | 12 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 7 |
| 01***25 | Bolt,(Without Gps Antenna Bracket) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (3/13) (Door 2/2) (For Kuc)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***08 | Screw - Clip Mounting | 5 |
| 01***10 | Bolt | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (4/13) (Pull Up) (For Kuc)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***12 | Screw,(Not Shown) (For Std Cab) | 2 |
| 01***16 | Screw | 5 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (5/13) (Window) (For Kuc)
| 01***12 | Screw | 6 |
| 20***60 | Trim,Front | 1 |
| 20***50 | Packing? 2.0mm | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (6/13) (Inside Cover) (For Kuc)
| 01***20 | Screw | 8 |
| 01***10 | Screw | 3 |
| 01***10 | Bolt | 8 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (7/13) (Door Catch) (For Kuc)
| 01***16 | Bolt - Box Mounting | 12 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***12 | Screw | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (8/13) (Hammer) (For Kuc)
| 01***20 | Screw | 2 |
| 21***40 | Hammer | 1 |
| (2***0) | Cab Ass'Y | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (9/13) (Wiring) (For Kuc)
| 01***14 | Screw | 1 |
| 22***50 | Clip | 1 |
| 22***70 | Duct | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Cab Related Parts) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 8 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat (Fixed Type) (For Kuc)
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***35 | Bolt,(For Fix Position) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat (Suspension Type) (For Kuc)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***35 | Bolt,(For Fix Position) | 2 |
| 01***40 | Bolt (Op) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (L.H. Control Lever And P.P.C.Line) (For Kuc)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (L.H. Panel Box) (For Cab) (For Kuc)
| 01***12 | Bolt - Front Cover Mounting | 1 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (L.H. Panel Box) (For Canopy) (For Kuc)
| 01***12 | Bolt - Front Cover Mounting | 1 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (Main Bracket And L.H. Stand Bracket) (For Cab) (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(Without Air Con.) | 2 |
| 01***25 | Bolt | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (Main Bracket And L.H. Stand Bracket) (For Canopy) (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***20 | Bolt,(Without Air Con.) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (Mounting And Cover) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (R.H. Control Lever And P.P.C.Line) (For Kuc)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (R.H. Panel Box) (For Kuc)
| 01***05 | Nut,(For Air Conditioner Less), Nut | 4 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 4 |
| 01***23 | Washer,(Without Air Con.) | 6 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (R.H. Stand Bracket? Blade And Accelerator Control Lever) (For Kuc)
| 01***16 | Bolt - Box Mounting | 2 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 1 |
| 01***25 | Bolt | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Operator'S Seat Stand (Work Equipment Lock Lever) (For Kuc)
| 01***12 | Bolt - Front Cover Mounting | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***03 | Nut, L. H. Thread | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Seat Belt (3 Inches)
| 20***12 | Seat Belt Ass'Y | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Tops Canopy
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 7 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Travel Alarm Switch (For Kuc)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***20 | Bolt | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Travel Lever And Linkage (1/3) (For Kuc)
| 01***50 | Bolt | 4 |
| 01***20 | Screw,(Australia Spec.) | 2 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Travel Lever And Linkage (2/3) (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***05 | Nut,L.H. (For Trimming Dozer) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Travel Lever And Linkage (3/3) (For Kuc)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 01***60 | Flat Washer - M20 (Hardened) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Travel Pedal
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 4 |
| 22***10 | Pedal,L.H | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Operator'S Compartment And Control System : Window Washer (For Cab)
| 01***16 | Screw | 2 |
| 08***08 | Grommet,(Without Beacon Lamp) | 1 |
| 20***10 | Band | 5 |
Service Kit And Component Parts
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Arm Cylinder (Inner Parts)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***24 | Nut,Bearing | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Blade Cylinder (Inner Parts)
| 01***24 | Nut,Bearing | 1 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***75 | O-Ring,Cylinder Head | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Boom Cylinder (Inner Parts)
| 01***24 | Nut,Bearing | 1 |
| 07***70 | O-Ring (Kit) | 2 |
| 07***75 | O-Ring,Cylinder Head | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Boom Swing Cylinder (Inner Parts)
| 01***22 | Nut,(North America Spec.) | 1 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***75 | O-Ring,Cylinder Head | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Bucket Cylinder (Inner Parts)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***19 | Nut | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : E.P.C. Valve (Inner Parts)
| 22***01 | Valve Ass'Y | 1 |
| UC***73 | O-Ring | 1 |
| UC***04 | O-Ring | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Pump (1/5)(#10951-)
| 70***12 | Pump Ass'Y | 1 |
| 70***12 | Pump Sub Ass'Y | 1 |
| (****0) | Holder | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Pump (2/5)(#10951-)
| (****0) | Piston Sub Ass'Y | 7 |
| (****0) | Spring | 1 |
| (****0) | Plate,Valve | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Pump (3/5)(#10951-)
| 70***10 | Valve Ass'Y | 1 |
| (****0) | Spool | 1 |
| (****0) | Spacer | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Pump (5/5)(#10951-)
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***30 | Screw | 3 |
| 01***45 | Bolt | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Pump (5/6)
| (****0) | Cover | 1 |
| (****0) | Gear Pump Ass'Y | 1 |
| (****0) | Gear,Drive | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (1/15)
| 04***15 | Bolt,Eye | 2 |
| 72***20 | Cover,Valve | 1 |
| 72***50 | Cover,Valve | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (10/15)
| 01***30 | Screw | 4 |
| 01***40 | Screw | 4 |
| 07***07 | O-Ring - (K10) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (11/15)
| 01***35 | Screw | 6 |
| 07***06 | O-Ring,(Not Shown) | 1 |
| 07***10 | O-Ring | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (12/15)
| 01***35 | Bolt | 5 |
| 01***23 | Washer,(With Auto Emergency Steering) | 5 |
| 07***23 | O-Ring,(F4350-65a0 -16 ) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (13/15)
| 70***10 | O-Ring (Kit) | 1 |
| 70***20 | Ring, Back-Up | 1 |
| 70***90 | O-Ring,Suction | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (14/15)
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 70***10 | O-Ring (Kit) | 1 |
| 72***01 | Valve Ass'Y,Relief | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (15/15)
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 2 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 5 |
| 70***40 | O-Ring | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (2/15)
| 01***30 | Bolt - M8 X 30lg | 4 |
| 01***23 | Washer,(For Shipping) | 8 |
| 07***04 | O-Ring | 20 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (3/15)
| (7***1) | Control Valve | 1 |
| (7***0) | Control Valve | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (4/15)
| 07***04 | O-Ring | 1 |
| 07***23 | O-Ring; Was 07002-10823, O-Ring,(Not Shown) | 1 |
| 70***30 | Ball | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (5/15)
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 07***11 | Plug,(For Shipping) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (6/15)
| 01***10 | Screw | 11 |
| 01***12 | Bolt | 3 |
| 01***16 | Screw | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (7/15)
| (7***1) | Control Valve | 1 |
| (7***0) | Control Valve | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (8/15)
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 2 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Main Valve (8-Valve) (9/15)
| 01***07 | Nut | 2 |
| 07***06 | O-Ring,(Not Shown) | 2 |
| 07***06 | Ring,Back-Up | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Ppc Valve (For Kuc)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***20 | O-Ring,(0202-007) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Swing Motor (1/2)
| 04***18 | Ring, Snap | 1 |
| 07***23 | O-Ring,(F4350-65a0 -16 ) | 3 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Swing Motor (2/2)
| 07***16 | O-Ring | 1 |
| 07***16 | Ring, Back-Up | 1 |
| 07***34 | O-Ring, O-Ring,Drain Plug? R.H. Half Tank | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Swivel Joint (Inner Parts)
| 01***16 | Bolt (Op) | 4 |
| 04***18 | Ring,Snap (With Emergency Steering) | 1 |
| 70***60 | Swivel Joint Ass'Y | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Travel Motor (1/2) (Inner Parts)
| 04***20 | Spring Pin | 3 |
| 04***12 | Ring, Snap (4) | 3 |
| 04***15 | Ring,Snap | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Service Kit And Component Parts : Travel Motor (2/2) (Inner Parts)
| 01***25 | Bolt,See Fig. K4010-65a0 | 7 |
| 04***12 | Pin,Spring (See Fig.0201) | 1 |
| 04***12 | Ring,Split, Ring-Snap | 1 |
Swing Circle And Related Parts
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Swing Circle And Related Parts : Swing Circle
| 01***60 | Bolt,For Weight Adjusting Bolt | 31 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 21***00 | Circle,Swing | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Swing Circle And Related Parts : Swing Machinery (Inner Parts)
| 01***80 | Capscrew | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 7 |
| 04***18 | Ring, Snap | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Swing Circle And Related Parts : Swing Machinery And Related Parts
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Swing Circle And Related Parts : Swivel Joint And Related Parts
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Travel And Lower Piping
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Travel And Lower Piping : Final Drive
| 01***30 | Bolt,(Not Used When Towing Winch) | 16 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 16 |
| 07***11 | O-Ring,(Tm8202-009) | 6 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Travel And Lower Piping : Lower Piping
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 04***10 | Clip,(See Fig.0311a Or 0321) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Travel And Lower Piping : Sprocket
| 01***30 | Bolt,(Not Used When Towing Winch) | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
| 21***10 | Sprocket | 2 |
Under Carriage
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Carrier Roller
| 01***85 | Bolt - Flange Mounting | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***12 | Ring, Snap (4) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Front Idler
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***45 | Capscrew - M10 X 1.25 | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Idler Cushion (For Rubber Shoe)
| 01***26 | Nut | 2 |
| 04***40 | Pin,Cotter (Kit) | 2 |
| 20***11 | Rod | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Idler Cushion (For Steel Shoe)
| 01***26 | Nut | 2 |
| 04***40 | Pin,Cotter (Kit) | 2 |
| 20***11 | Rod | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Rubber Shoe (Road Liner) (Width 300mm)
| 20***80 | Pin? Regular,Regular | 78 |
| 20***90 | Pin? Master,Master | 2 |
| 20***10 | Bushing | 80 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Frame (For Kuc)
| 22***10 | Track Frame | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Frame Cover
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***20 | Capscrew | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Guard (For Road Liner)
| 01***30 | Bolt - M14 X 30lg | 12 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 12 |
| 21***10 | Guard,R.H | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Guard (For Steel Shoe)
| 01***11 | Nut (Welded) | 12 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 12 |
| 20***11 | Bolt | 12 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Roller
| 01***30 | Bolt - M14 X 30lg | 16 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 16 |
| 07***21 | O-Ring,Water Piping | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Shoe (Double Grouser With Hole)
| 20***10 | Track Shoe Ass'Y | 1 |
| 20***10 | Shoe Ass'Y,Regular | 78 |
| 20***20 | Shoe Ass'Y,Master | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Under Carriage : Track Shoe (Rubber Shoe)
| 21***10 | Shoe,Rubber | 2 |
Work Equipment
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Arm (Long Arm) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Arm (Std) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Arm Cylinder (For Kuc)
| (7***0) | Cylinder Group,(Natural Yellow) | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Attachment Line (Attachment Side) (For Long Arm) (For Kuc)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***45 | Screw | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Attachment Line (Attachment Side) (For Std Arm) (For Kuc)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***45 | Screw | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Blade
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 04***06 | Lock,Plate | 2 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Blade (Strengthen Type)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 02***45 | Bolt | 11 |
| 02***13 | Nut,(Pl) | 11 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Blade Lift Cylinder And Cover
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Boom (Boom And Hose) (For Kuc)
| 01***45 | Screw | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Boom (Mounting Pin) (For Kuc)
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 04***12 | Lock,(With Rain Cap) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Boom (Tube) (For Kuc)
| 01***55 | Screw | 1 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***25 | Bolt - Relay Mounting | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Boom (Working Lamp) (For Kuc)
| 01***12 | Bolt - M8 - 1.25 X 12 | 1 |
| 01***45 | Bolt, Mounting Cranking Motor | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Boom Cylinder And Guard (Cab Spec.) (For Kuc)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 20***10 | Guide | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket 0.025m3 (Mini 0.033m3) 320mm Wide (For Kuc)
| 20***60 | Adapter (Welded) | 3 |
| 20***70 | Tooth | 3 |
| 20***81 | Pin | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket 0.035m3 (Mini 0.044m3) 420mm Wide (For Kuc)--------------------------------------------------
| 20***60 | Adapter (Welded) | 3 |
| 20***70 | Tooth | 3 |
| 20***81 | Pin | 3 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket 0.05m3 (Mini 0.08m3) 500mm Wide (For Kuc)
| 20***51 | Lip (Welded) | 1 |
| 20***60 | Adapter (Welded) | 4 |
| 20***70 | Tooth | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket 0.06m3 (Mini 0.09m3) 600mm Wide (For Kuc)
| 20***60 | Adapter (Welded) | 4 |
| 20***70 | Tooth | 4 |
| 20***81 | Pin | 4 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket Cylinder (For Kuc)
| 70***50 | Cylinder Group | 1 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket Link (For Kuc)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 04***12 | Lock,(With Rain Cap) | 2 |
Komatsu : Pc27mrx-1a(S/N 10001-Up) : Work Equipment : Bucket Pin
| 01***85 | Bolt,(Used With Pin Puller) | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
| 14***21 | O-Ring (Kit) | 2 |
Frequently asked questions
What engine does the Komatsu PC27MRX-1A(S/N 10001-UP) use?
It is powered by a Komatsu 3D82AE-3, a naturally aspirated 3-cylinder mechanical diesel rated around 19 kW (25.5-25.7 hp), with no electronic engine controls (no ECM).
What is the operating weight of the Komatsu PC27MRX-1A(S/N 10001-UP)?
Approximately 2,996 kg (6,605 lb) for this serial range. Configuration -- canopy vs. cab, blade, and shoe width -- can shift that figure within the roughly 2.9-3.3 t band typical of this size class, so treat it as representative rather than exact for a given unit.
What replaced the Komatsu PC27MRX-1A(S/N 10001-UP)?
It was succeeded by the PC27MR line: PC27MR-1, then PC27MR-2 (documented circa 2004-2008), then PC27MR-3. These later generations carried the same basic 3-cylinder engine architecture forward with updated emissions compliance and cab refinements.
What PC27MRX-1A(S/N 10001-UP) owners discuss
What do real owners and techs say about long-term reliability of the PC27MRX-1A?
Owner reports on the same MRX-1 platform point to strong durability. One PC30MRX-1, built on the same chassis and hydraulic architecture and covered by the same shop manual family (PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1), ran close to 4,000 hours with smooth control response and no overheating complaints. Expect the same reputation from the PC27MRX-1A: solid if maintenance stays current, with wear items like tracks, rollers, and final drives needing periodic replacement rather than major failures.
Why do the tracks crawl while the boom and bucket still work fine?
This is the classic symptom of a rotary (center swivel) manifold seal bypassing pressure. Techs report it causes most of these complaints on the PC27 platform: oil leaks past the worn seal at the swivel joint instead of reaching the travel motors, so upper functions stay strong while track speed drops. Worn sprockets, damaged track rollers, and low system pressure are the other usual causes. Check the swivel joint seals first before condemning a travel motor.
Are there hydraulic power limits owners run into?
Lift and breakout are adequate for the class, but owners note the front end gets light and lift power feels marginal once a hydraulic thumb is added without extra counterweight. Plan on a counterweight kit if you will pick material with a thumb regularly.
What are the known quirks of this engine?
The PC27MRX-1A runs a Yanmar-built 3-cylinder diesel, Komatsu-badged 3D82AE-3, with mechanical injection and no electronic engine controller. This generation predates ECM diesels, so there is no fault-code display for the engine, only analog gauges. Cold starts need the glow plug preheat cycle to finish before cranking. Fuel contamination from water or dirt is the most common cause of stuck injection pump plungers and injector trouble on this engine, which is why rebuild kits for the 3D82AE stay in steady demand. Keep the water separator drained and run clean fuel.
What electrical issues come up most?
The pilot (safety) lockout lever switch and its wiring are the first thing to check when no hydraulic function responds at all: inspect the switch, connector pins, ground path, and fuses or relays before assuming a pump or valve failure. This generation uses simple sender-based gauges for coolant temp, oil pressure, and charge rather than digital diagnostics, so a warning lamp that will not clear is often a bad sender or ground, not necessarily the system it monitors. Because the lockout lever is a safety device that disables hydraulic control when raised, have your dealer verify correct switch and wiring function after any repair.
What wear patterns show up in the undercarriage?
Rubber tracks on this machine run 300 mm (12 in) wide, standard for this weight class, and track, roller, and sprocket wear is the main recurring undercarriage cost. Keep tension correct: a sagging or over-tight track accelerates roller and idler wear. The travel (final drive) motor is a wear item that eventually needs rebuild or replacement, and the steady aftermarket supply of final drive motors for this exact model reflects how often it gets swapped on higher-hour machines.
What should I check before buying a used PC27MRX-1A(S/N 10001-UP)?
Bring a mechanic or experienced operator if you are not confident judging wear; the difference between a bargain machine and an expensive one is not always visible. Check remaining track percentage, boom and arm bushing and pin play, and cab or canopy structure for rattles or cracks. Run every hydraulic function under load and look for leaks at the swivel joint, travel motors, and cylinder rod seals. Confirm the engine starts cleanly after the glow plug cycle without excess smoke. Test that the safety lockout lever fully locks out and restores hydraulic control, and match the serial number against the 10001-up range before assuming parts interchange with earlier or later production. Have your dealer verify the lockout lever and hydraulic lockout circuit before putting the machine back to work.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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