Komatsuhydraulic excavatorsmall ( - pc90)
Komatsu PC40-5(S/N 8501-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu PC40-5 (S/N 8501-UP) is a compact hydraulic excavator in the roughly 4-ton class, built through the late 1980s and into the mid-1990s as the successor to the PC40-2. It runs a Komatsu 3D95S / 3D95S-W-1 three-cylinder diesel, naturally aspirated and mechanically injected, rated at roughly 28.7 kW (38.5 hp) from about 2.03 L displacement. Operating weight runs close to 3.9 t (8,620 lb) in standard trim, with published figures for this class running up to about 4.3 t (9,500 lb) depending on cab, undercarriage, and track shoe configuration. Komatsu offered it with canopy or enclosed cab and rubber or steel track shoes, digging to about 3.78 m (12 ft 5 in) and reaching roughly 6.22 m (20 ft 5 in) with a general-duty bucket.
Within the 8501-UP serial run, Komatsu carried the base 3D95S-W-1 engine through later -1C, -1D, and -1E arrangement changes, running fuel-system and ancillary updates without altering the PC40-5 model designation itself. This generation carries an open-center, gear-pump hydraulic circuit and a purely mechanical fuel system, with no engine controller and no self-diagnostic fault codes; abnormalities show up only as warning lamps on the analog gauge cluster. The PC40-5 was followed by the PC40-6 and later the Dash-7 generation PC40-7, and the model number itself continued forward in the reduced-tail-swing PC40MR and PC40MRX lines and the current PC40R-8. In the used and parts market, the PC40-5 remains in demand for its small footprint, a simple engine that needs no dealer scan tool to service, and parts commonality with the PC40-6 and PC50UU-1, which keeps rebuild kits and wear items available for owners running these machines well past their original service life.
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 PC40-5(S/N 8501-UP) specifications
Engine
| Engine model | Komatsu 3D95S / 3D95S-W-1 three-cylinder diesel, naturally aspirated, mechanical injection. The factory parts catalog for this serial range shows a running change to the 3D95S-W-1C arrangement partway through the range. A minority of spec aggregators list other engine codes for this model; those are not well corroborated for this exact serial range and likely reflect a mixup with a related model. Confirm the exact arrangement against the block’s engine tag. |
| Gross power | Approximately 28.7 kW (38.5 hp). |
| Displacement | About 2.03 L |
| Cylinders | 3 |
| Emissions tier | None. Pre-emissions-tier, mechanically governed diesel, consistent with 1988-1995 production. |
Weights
| Operating weight (standard configuration) | 3.91 t (8,620 lb). Other published figures for this machine class run up to about 4.3 t (9,500 lb); treat as approximate for this exact serial range. |
| Ground pressure | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
Dimensions
| Transport length | 5.34 m (17 ft 6 in) |
| Transport width | 1.84 m (6 ft 0 in) |
| Transport height | 1.38 m (4 ft 6 in), boom lowered for transport |
| Track shoe width | 400 mm (15.7 in), standard rubber pad |
| Ground clearance | 380 mm (15 in) |
| Tail swing radius | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
| Undercarriage length | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
Performance
| Max dig depth | 3.78 m (12 ft 5 in) |
| Max reach at ground level | 6.22 m (20 ft 5 in) |
| Max dump/digging height | 6.48 m (21 ft 3 in) |
| Travel speed | 4.3 km/h (2.7 mph) |
| Swing speed | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
| Gradeability | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
| Drawbar pull | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
Forces
| Bucket digging force | 25.5 kN (5,733 lbf) tear-out force |
| Stick/arm digging force | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
Service capacities (summary)
| Fuel tank | 55 L (14.5 gal) |
| Hydraulic system/tank | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
| Engine oil | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
| Cooling system | Not documented for this exact serial range. Verify with your dealer or the factory spec sheet. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
PC40-5(S/N 8501-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not documented in accessible service literature for this exact serial range. Engine is the Komatsu 4D95L diesel; confirm exact refill volume against the operation & maintenance manual or with a Komatsu dealer. | Komatsu Genuine engine oil (EO series) or an API CD/CE-rated diesel engine oil. SAE 10W or 10W-30 for cold-weather starting, SAE 30 or 15W-40 for temperate-to-hot climates, per Komatsu's standard temperature-graded oil selection chart. |
| Cooling system | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | Komatsu Genuine permanent-type (ethylene-glycol) antifreeze/coolant, mixed to Komatsu's freeze-protection chart for the expected ambient low. Do not mix with non-genuine coolant types. |
| Fuel tank | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | No. 2-D diesel fuel meeting ASTM D975. Switch to a winter-grade or blended diesel below freezing per Komatsu's cold-weather fuel guidance. |
| Hydraulic system total | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | Komatsu Genuine hydraulic oil (HO series) or an equivalent anti-wear hydraulic oil. Viscosity grade follows ambient temperature — lighter grade for cold climates, heavier grade for hot climates — per Komatsu's standard hydraulic-oil selection chart. |
| Hydraulic tank | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | Same Komatsu Genuine hydraulic oil (HO series) used for the hydraulic system total. |
| Final drive (each) | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | Komatsu Genuine powertrain/gear oil (TO series) or an API GL-4/GL-5 gear oil. SAE 30 in temperate climates, SAE 10W in cold climates, per Komatsu's standard chart. |
| Swing drive | Not documented in accessible sources for this exact serial range — verify with the operation & maintenance manual or a Komatsu dealer. | Same Komatsu Genuine powertrain/gear oil (TO series) specified for the final drives. |
| Grease (all points) | Applied per grease fitting on the standard lubrication interval; no reservoir volume specified. | Komatsu Genuine multi-purpose lithium EP grease (G2-LI series), NLGI #2, for boom/arm/bucket pins, bushings, and the swing circle bearing. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu PC40-5(S/N 8501-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 PC40-5(S/N 8501-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
The 3D95S-W-1 three-cylinder diesel on this machine runs mechanical injection with no ECM, so fluid sampling is the earliest warning system available. Pull engine oil samples at every change to catch bore glazing, injector drift, and coolant intrusion before they become a rebuild. This machine runs an open-center, gear-pump hydraulic circuit shared across travel, swing, and every cylinder function, so a hydraulic sample flags contamination everywhere at once. Track grease consumption at the boom, arm, and bucket pins; a sudden jump signals bushing wear before the joint develops play.
Corrective & Common Repairs
Most corrective work on this machine targets seals and wear items, not the engine block. Final drive and travel motor case seals are a known leak point: fluid puddling under the machine and uneven or slow track travel follow. Swing bearing and bucket/arm/boom pin-and-bushing play is routine on higher-hour units, usually from skipped greasing rather than a design fault. Cold mornings can expose a weak glow plug or relay as hard starting or white smoke. A dead hydraulic function after sitting idle often points to the pump drive coupling, not the pump itself.
Overhaul & Rebuild Points
At this age, most units need undercarriage renewal: track links, rollers, idlers, and sprockets wear out long before the engine does. Engine rebuild work on the 3D95S-W-1 typically centers on the injection pump, injectors, and top-end rather than a full bottom-end replacement. Swing bearing wear shows up as play or a knock under load and calls for a full reseal and bearing renewal. Final drive and travel motor cases are common rebuild candidates once seal leaks progress to gear-oil contamination or internal bearing damage.
Seasonal & Environment Servicing
Cold climates hit the 3D95S-W-1 hardest at start-up: confirm the glow plug preheat lamp cycles correctly and run winter-grade engine and hydraulic oil before temperatures drop. Check coolant freeze protection every fall since this small cooling system holds little reserve. In hot, dusty conditions, clean the radiator and oil cooler fins more often than standard; a clogged core is a known overheating cause on this size machine. On wet or muddy sites, grease the boom, arm, and bucket pins more frequently to purge contaminated grease before it turns abrasive.
PC40-5(S/N 8501-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 20S-98-12230 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 20S-98-12120 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 09637-30661 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 09637-30762 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 20T-98-32230 | Plate? Caution,Air Filter | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
PC40-5(S/N 8501-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine oil pressure lamp (oil can symbol, red) | Engine oil pressure below safe minimum | Low oil level, clogged oil filter, worn oil pump, or oil pressure switch fault | Stop engine immediately, check oil level and top up, inspect for leaks before restarting |
| Charge lamp (battery symbol, red) | Alternator not charging the battery | Loose or broken fan/alternator belt, faulty alternator, or wiring fault | Stop and inspect belt tension and alternator wiring; test alternator output |
| Coolant temperature lamp (thermometer symbol, red) | Engine coolant overheating | Low coolant level, clogged radiator fins, slipping fan belt, or faulty thermostat | Idle engine, let it cool, check coolant level and radiator for blockage before continuing work |
| Air cleaner clog lamp (filter symbol) | Air filter element restricted | Dirty or clogged air filter element from dusty operating conditions | Stop engine, clean or replace the air filter element, reset indicator |
| Preheat (glow) indicator lamp | Glow plug preheat cycle status for cold starting | Normal cold-start aid; if lamp stays on or never lights, points to a glow relay or glow plug circuit fault | Wait for lamp to go out before cranking; if it misbehaves, check glow relay and glow plug wiring |
| Fuel level lamp/gauge (low fuel) | Fuel level in tank approaching empty | Machine run low on diesel during operation | Refuel promptly to avoid drawing air into the fuel system and needing to bleed the fuel lines |
| Hydraulic oil temperature gauge in red zone | Hydraulic oil overheating | Low hydraulic oil level, clogged oil cooler fins, or sustained overload | Reduce load, idle down, check hydraulic oil level and cooler for debris |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
PC40-5(S/N 8501-UP) attachments & work tools
Buckets
General-duty bucket capacity runs about 0.19 m³ (0.25 cu yd), with bucket digging (tear-out) force near 25.5 kN (about 5,700 lbf). Pin-on buckets for this class use a 45mm (1.77 in) pin diameter, 230mm (9.06 in) pin spacing, and 170mm (6.69 in) ear width. Digging buckets for this size range span roughly 300-900mm (12-36 in) wide; wider, shallower ditching/grading buckets run about 1050-1500mm (42-60 in). Standard mounting is pin-on; HD or rock-specific bucket profiles are not commonly cataloged at this size class — most suppliers offer one general-duty digging profile plus a wide ditching/grading option.
Hydraulic hammers
This machine sits in the roughly 2.5-4.5 t (5,500-9,900 lb) excavator class used to size mini hydraulic breakers. Matching breakers fall in the approximate 180-230 kg (400-500 lb) operating-weight class, rated near 25-50 L/min flow at 90-120 bar working pressure, with impact energy around the low-300 J range. Confirm the exact flow and pressure against the pump actually fitted to this serial range before ordering a breaker, since output varies by configuration.
Quick couplers
Mechanical pin-grabber/wedge quick couplers sized to the 45mm pin bore are the typical fitment for this class, letting the operator swap bucket, thumb, or hammer without knocking pins by hand. Powered (hydraulic) couplers with an in-cab switch are also offered as retrofit kits. This machine's vintage platform has no factory quick-coupler provision, so any coupler on this machine is an aftermarket fitment rather than an OEM option.
Thumbs/grapples
Both mechanical (bolt/pin-adjustable) and hydraulic (cylinder-actuated) thumb kits are cataloged for this bucket-pin and weight class, clamping against the bucket to grab brush, rock, and debris. Hydraulic thumbs need a tie-in to an auxiliary hydraulic circuit; mechanical thumbs need no extra plumbing. Grapple-type attachments offered at this size are generally the same thumb-style clamp geometry rather than a full rotating grapple, which is more common on larger machines.
Rippers
No dedicated single-shank ripper attachment is commonly cataloged for this bucket-pin and weight class; standalone ripper attachments are mainly offered starting around 4-5 t and up on major attachment lines. Ripping duty at this machine size is normally handled with a bolt-on ripper tooth or shank fitted to the bucket cutting edge rather than a separate ripper attachment. Verify with an attachment supplier if a standalone unit is actually needed for this weight class.
Hydraulic-kit notes
This machine's era does not carry factory auxiliary (breaker) hydraulics as standard equipment. Running a hammer, hydraulic thumb, or powered coupler needs an aftermarket auxiliary valve and plumbing kit tied into the main pump circuit. Size the kit to the tool's rated flow and pressure — commonly 25-50 L/min at 90-120 bar for hammers in this class — a standard single-auxiliary, medium-pressure circuit. High-flow circuits are not typically needed for hammer or thumb work tools at this machine size.
All PC40-5(S/N 8501-UP) assemblies by section
Every catalogued assembly group for the Komatsu PC40-5(S/N 8501-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
3d95s-W-1c Engine S/N 10467-Up
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Air Cleaner
| 09***61 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***62 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***61 | Plate? Instruction,(Italian-English) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Air Intake Manifold And Connection
| 01***50 | Bolt,(With Corrosion Resistor) | 4 |
| 01***60 | Screw | 2 |
| 09***50 | Liquid Gasket, Lg-7, 150g | 0 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Air Intake Manifold And Connection (With Dust Indicator Outlet)
| 01***50 | Bolt,(With Corrosion Resistor) | 4 |
| 01***60 | Screw | 2 |
| 02***04 | Plug,(Not Shown) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Alternator (35a)
| 60***40 | Alternator A. (35a),(35a) | 1 |
| ND***01 | Bushing,Insulate | 1 |
| ND***00 | Pulley | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Alternator And Mounting
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***45 | Bolt | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***00 | Camshaft Ass'Y | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Crankshaft
| 61***20 | Bolt | 1 |
| 62***00 | Crankshaft Ass'Y | 1 |
| 62***10 | Pulley?Non Hardening,Crank | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Cylinder Block
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 10 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-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 : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Cylinder Head Cover
| 61***20 | Screw | 2 |
| 61***30 | Washer,(B) | 2 |
| 61***42 | Packing,Cylinder Head Cover | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Exhaust Manifold
| 01***25 | Stud | 3 |
| 01***25 | Bolt - Relay Mounting | 6 |
| 62***10 | Manifold,Exhaust | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Feed Pump
| YM***00 | Feed Pump Ass'Y | 1 |
| YM***50 | Gasket,(Square Type) | 1 |
| YM***20 | O-Ring,(Round Type) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Flywheel And Flywheel Housing
| 01***40 | Bolt | 6 |
| 01***35 | Bolt | 1 |
| 01***40 | Bolt,Reamer | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Front Cover And Gear
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
| 01***20 | Bolt,(With Tachometer Outlet) | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Fuel Filter And Piping
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 07***67 | Clamp, Hose | 4 |
| 07***03 | Hose | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Fuel Injection Pump
| 62***20 | Injection Pump Ass'Y | 1 |
| YM***60 | O-Ring,Fuel Injection Pump | 1 |
| YM***70 | Retainer, Spring | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Fuel Injection Pump And Piping
| 01***25 | Stud | 3 |
| 01***06 | Nut | 3 |
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-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 : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : 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 : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Heater Signal? Relay? Timer
| 60***90 | Signal,Heater | 1 |
| 60***20 | Timer,Safety | 1 |
| 60***30 | Relay | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Lubricating Oil Filter
| 20***51 | Plate? Instruction,(English) (For Melroe) | 1 |
| 60***30 | Cartridge | 1 |
| 60***20 | Plate? Caution,(Italian-English) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Lubricating Oil Pump And Suction Pipe
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 6 |
| 61***30 | O-Ring,Suction Tube | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Muffler
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***06 | Nut | 4 |
| 01***16 | Washer,(For Shipping Parts) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Nozzle Holder
| 07***10 | Tube,(See Fig.0421-14) | 2 |
| 07***18 | Tube,Spill | 1 |
| 60***50 | Plug,Glow | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Oil Pan(#10467-16480)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 01***16 | Screw | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Oil Pan(#16481-)
| 01***16 | Bolt, Mount Solenoid Valve | 24 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 62***11 | Pan,Oil | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Piston And Connecting Rod
| 04***12 | Ring, Snap | 6 |
| 62***11 | Piston (L) | 3 |
| 62***21 | Piston (S) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-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 : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Starting Motor
| 60***50 | Starting Motor A.,(2.0kw) | 1 |
| ND***20 | Starter Kit | 1 |
| ND***60 | Bearing,Ball | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Starting Motor And Mounting
| 01***25 | Stud | 1 |
| 01***35 | Screw | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Water Pump And Cooling Fan
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***35 | Screw | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : 3d95s-W-1c Engine S/N 10467-Up : Water Separator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(See Fig.2415) | 1 |
| 60***10 | Cover | 1 |
Control System And Revolving Frame
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Blade Control Lever And Linkage
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Boom Swing Control Lever And Linkage
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Boom Swing Control Lever And Linkage (For I.S.O. Pattern)
| 01***20 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Control Pedal (For Attachment)
| 01***25 | Bolt,Without Revolution Sensor | 1 |
| 01***30 | Bolt,(For Mechanical Governor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Fuel Control Lever And Linkage
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Fuel Control Lever And Linkage (Tbg Spec)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Revolving Frame
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***40 | Bolt | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Revolving Frame (For Attachment)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***40 | Bolt | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Revolving Frame (Tbg Spec)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***40 | Bolt | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***30 | Bolt,(For Mechanical Governor) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Travel Control Lever And Linkage (For I.S.O. Pattern)
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Travel Speed Pedal And Linkage
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 1 |
| 01***10 | Nut,(Without Air Conditioner) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Work Equipment Control Lever
| 01***40 | Bolt,(With Air Conditioner) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Work Equipment Control Lever (For I.S.O. Pattern)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Work Equipment Control Lever (Quick Shift Type)
| 01***30 | Bolt,(For Mechanical Governor) | 1 |
| 01***40 | Bolt,(With Air Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Control System And Revolving Frame : Work Equipment Control Linkage
| 01***06 | Nut? L.H. Thread,L.H. Thread (For Chinese) | 4 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 4 |
| 04***10 | Pin, Cotter | 4 |
Engine Related Parts And Electrical System
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cab)(#8501-9574)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cab)(#9575-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Canopy)(#8501-9542)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Canopy)(#9543-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cold Weather) (For Cab)(#8501-9574)
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***18 | Bolt | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cold Weather) (For Cab)(#9575-)
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***18 | Bolt | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cold Weather) (For Canopy)(#8501-9542)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 1 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Battery (For Cold Weather) (For Canopy)(#9543-)
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Electrical System
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***08 | Screw, Terminal | 5 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Electrical System (Tbg Spec)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***16 | Bolt (With Air Heater & Conditioner) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts(#8501-9295)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 14 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 12 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts(#9296-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 14 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Exhaust Piping
| 01***25 | Bolt,Without Revolution Sensor | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping (For Vandalism Protection)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Fuel Tank And Piping (Tbg Spec)
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Gauge Claster
| 20***10 | Gauge Ass'Y,Cluster | 1 |
| KA***00 | Gauge,Water Temperature | 1 |
| KA***00 | Meter,Service | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Instrument Panel
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***06 | Screw | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Instrument Panel (Tbg Spec)
| 01***20 | Bolt | 1 |
| 01***06 | Screw | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Power Take Off
| 01***40 | Bolt,Reamer | 6 |
| 04***12 | Pin,Spring (See Fig.0201) | 6 |
| 20***00 | Coupling Ass'Y | 1 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Engine Related Parts And Electrical System : Radiator Reservoir Tank
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
| 07***37 | Clamp, Overflow Hose | 2 |
Guard
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Canopy
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 15 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 8 |
| 01***32 | Washer (Op) | 7 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Car Heater (For Cab)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 7 |
| 08***14 | Band,(For Additional Fuel Strainer) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Car Radio (For Cab)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***12 | Screw,(Additional Sun Visor) | 8 |
| 01***13 | Washer,Spring(For Wiper Switch Earth) | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Electrical System (For Cab)
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
| 01***16 | Screw, Mount Parking Lights | 2 |
| 01***10 | Washer,Spring (For Engine Room Lamp) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Floor (1/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 15 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 13 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Floor (1/2) (Tbg Spec)
| 01***20 | Bolt,(Without Maintenance Monitor) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 15 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Floor (2/2)
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 9 |
| 01***65 | Bolt,(Except Japan) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Floor (For Attachment)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 15 |
| 01***80 | Bolt,(For Adjustable Rod) | 3 |
| 01***10 | Nut,(Without Air Conditioner) | 13 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Machinery Compartment (1/2)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Machinery Compartment (2/2)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Machinery Compartment (For Vandalism Protection)
| 01***12 | Bolt,(With Cylinder Cover) | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 2 |
| 04***18 | Pin,Cotter (With Body Positioner) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Cab (1/4)
| 01***30 | Bolt,(For France Noise Suppression) | 9 |
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Cab (1/4) (Tbg Spec)
| 01***30 | Bolt,(For France Noise Suppression) | 9 |
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***12 | Bolt,(With Cylinder Cover) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Cab (2/4)
| 20***20 | Sash Ass'Y | 1 |
| 20***30 | Sash | 1 |
| 20***60 | Glass | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Cab (3/4)
| 01***08 | Screw | 2 |
| 01***08 | Screw | 4 |
| 04***12 | Rivet | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Cab (4/4)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 10 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Seat (For Cab)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 9 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Seat (For Canopy)
| 01***35 | Bolt,(For Position Fixing) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
| 01***50 | Bolt,(With Service Valve R.H.) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Seat (Tbg Spec)
| 01***25 | Bolt,Without Revolution Sensor | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Operator'S Seat (With Oil Suspension)
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Guard : Window Washer
| 01***20 | Bolt,(Without Maintenance Monitor) | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
| 01***10 | Washer,(For 35a Alternator) | 2 |
Mark Plate? Tool And Kit
Komatsu : Pc40-5(S/N 8501-Up) : Mark Plate? Tool And Kit : Marks And Plates (Except Japan)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 8 |
| 09***00 | Plate? Safety,Lock Lever (With Lock Pin) | 1 |
| 09***00 | Plate? Safety,Starting And After Operating | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Mark Plate? Tool And Kit : Marks And Plates (Tbg Spec)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Safety,Swing Lock Lever | 1 |
| 09***00 | Plate? Safety,Starting And After Operating | 1 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Mark Plate? Tool And Kit : Tool (Except Japan)
| 07***50 | Pump, (Bellows Type) | 1 |
| 07***03 | Cartridge - Grease | 1 |
| 07***45 | Nozzle, Grease Pump (Non-Flexible Type) | 1 |
Swing System
Komatsu : Pc40-5(S/N 8501-Up) : Swing System : Sprocket
| 01***30 | Bolt,(Not Used With Emergency Str.) | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
| 20***10 | Sprocket | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Swing System : Swing Circle
| 01***70 | Bolt, Accumulator Mounting Bracket | 40 |
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 3 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Under Carriage : Recoil Spring
| 01***16 | Bolt (With Air Heater & Conditioner) | 4 |
| 01***70 | Bolt, Accumulator Mounting Bracket | 8 |
| 01***27 | Nut | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Frame
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 12 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Frame (Tbg Spec)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***85 | Bolt,(For 2nd Travel Speed) (Op) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 12 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Roller
| 01***30 | Bolt-Hex, Bolt,(With Center Guard) | 40 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 40 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Shoe (Flat Type)
| 20***23 | Track Shoe Ass'Y | 1 |
| 20***30 | Shoe Ass'Y | 74 |
| 20***50 | Pin,Regular | 72 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Shoe (Triple Grouser With Rubber)
| 01***10 | Nut,(Without Air Conditioner) | 592 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 592 |
| 20***60 | Track Shoe Ass'Y | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Under Carriage : Track Shoe (Triple Grouser)
| 20***14 | Track Shoe Ass'Y | 1 |
| 20***15 | Track Shoe Ass'Y | 1 |
| 20***20 | Track Shoe Ass'Y | 1 |
Work Equipment
Komatsu : Pc40-5(S/N 8501-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 | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Arm Cylinder
| 01***11 | Nut,(With Under Mirror) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Blade
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 07***75 | Fitting,Grease (Without Lub. Piping) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Blade (With Cutting Edge)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 14 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Blade Cylinder
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
| 07***95 | Ring,Back-Up? Cylinder Head | 1 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Boom
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Boom Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Boom Swing Bracket
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 1 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Bucket Cylinder
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
| 07***85 | O-Ring,(For Snow Removing) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Bucket? 0.05m3? (Mini 0.08m3) Width 300mm
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Bucket? 0.13m3? (Mini 0.22m3) Width 600mm
| 02***60 | Bolt (Op) | 2 |
| 02***15 | Nut (Op) | 2 |
| 20***10 | Shim Ass'Y | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Electrical System (Boom Side)
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Electrical System (Boom Side) (Tbg Spec)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 08***60 | Bulb? 60w | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping (Arm Cylinder Line) (Hoe Side)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
| 20***80 | Clamp | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping (Blade Cylinder Line) (Attachment Side)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 07***08 | Hose | 1 |
| 07***11 | Hose | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping (Boom Cylinder Line) (Hoe Side)
| 01***35 | Bolt,(For Position Fixing) | 6 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping (Bucket Cylinder Line) (Hoe Side)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 20***90 | Clamp | 8 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping (Swing Cylinder Line)
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping(Arm Cylinder Line)(Hoe Side)(For Attachment
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Hydraulic Piping(Boom Cylinder Line)(Hoe Side)(For Attachmen
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 6 |
| 07***50 | Seal,(Y1620-41a0a-3) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Light Work Bucket? 0.16m3? (Mini 0.26m3) Width 700mm
| 02***60 | Bolt (Op) | 2 |
| 02***15 | Nut (Op) | 2 |
| 20***10 | Shim Ass'Y | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Link
| 01***10 | Bolt,(Noise Suppression Spec.) | 4 |
| 01***10 | Nut,(Without Air Conditioner) | 8 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Long Arm
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***35 | Bolt, Hydraulic Tank Mounting | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment : Swing Cylinder
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***95 | O-Ring,(Y1620-11a0a-12) | 1 |
Work Equipment Control System
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : 3-Spool Control Valve (1/2)
| 01***10 | Bolt | 6 |
| 01***16 | Bolt (Op) | 6 |
| 01***20 | Bolt (Itl) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : 3-Spool Control Valve (2/2)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : 6-Spool Control Valve (1/3)
| 01***10 | Bolt | 12 |
| 01***16 | Bolt (Op) | 12 |
| 01***20 | Bolt (Itl) | 6 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : 6-Spool Control Valve (2/3)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : 6-Spool Control Valve (3/3)
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 3 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 70***70 | Spring | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Arm Cylinder Line) (Chassis Side)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 20***50 | Elbow | 2 |
| 20***60 | Elbow | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Blade Cylinder Line) (Chassis Side)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***36 | Wahser-Spring, Washer,Spring (Without Towing Winch) | 4 |
| 04***64 | Pin,Snap (Welded) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Boom Cylinder Line) (Chassis Side)
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 2 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Bucket Cylinder Line) (Chassis Side)
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 2 |
| 20***60 | Hose | 2 |
| 20***81 | Elbow | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Drain)
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 1 |
| 07***05 | Tube | 1 |
| 07***06 | Tube (1) | 1 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Pump To Valve) (For Attachment) : Unit_01_of_02
| 01***25 | Bolt,Without Revolution Sensor | 6 |
| 01***35 | Bolt,(For Position Fixing) | 12 |
| 01***50 | Bolt,(For Strengthened Cover) | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Pump To Valve) (For Attachment) : Unit_02_of_02
| 01***20 | Bolt,(With Auto Emergency Steering) | 4 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Return)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***11 | Nut,(With Under Mirror) | 2 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Tank To Pump)
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
| 07***13 | Hose | 2 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Chassis Side)
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 1 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 5 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Piping (Travel Motor Line) (Track Side)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Pump (1/2)
| 20***00 | Pump Ass'Y | 1 |
| KB***01 | Plate,With Coupling | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Pump (2/2)
| KB***01 | Seal | 6 |
| KB***01 | Seal,Oil (Kit) | 6 |
| KB***09 | Gear Ass'Y,Center | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Tank
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Hydraulic Tank (For Vandalism Protection)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Pc40-5(S/N 8501-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 : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Swivel Joint
| 01***35 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Washer,Spring?For Additional Rear Lam | 4 |
| 04***25 | Ring, Retaining | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Travel Motor (1/2)
| 01***20 | Bolt, Mount Spool Covers | 6 |
| 06***01 | Bearing,Ball | 1 |
| 06***03 | Bearing,Ball | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Travel Motor (1/2) (Reinforced Type)
| 01***20 | Bolt, Mount Spool Covers | 6 |
| 06***01 | Bearing,Ball | 1 |
| 06***03 | Bearing,Ball | 1 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Travel Motor (2/2)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 04***12 | Ring,Snap (For Ripper) | 3 |
| 04***18 | Ring, Snap | 3 |
Komatsu : Pc40-5(S/N 8501-Up) : Work Equipment Control System : Travel Motor (2/2) (Reinforced Type)
| 04***10 | Ring,Snap | 1 |
| 04***12 | Ring,Snap (For Ripper) | 3 |
| 04***18 | Ring, Snap | 3 |
PC40-5(S/N 8501-UP) serial number reference
The PIN/serial plate on the PC40-5 is riveted to the machine frame at the front, right side in the direction of travel, near the base of the boom foot - low enough to read from ground level. Read the digits stamped after the model designation directly against the number itself (for example 8501, 10467, 12209...); this machine predates Komatsu's 17-character VIN system, so there is no separate 3-character alpha PIN prefix to decode, the plain serial number is the identifying range.
| Prefix | Identifies | Notes |
|---|---|---|
| 8501-UP | PC40-5 mini excavator, standard production (base serial range for the whole family) | Single serial range covers the full PC40-5 production run, roughly 1988 to 1995. Both the US-market and Japan-market parts book editions share this same starting point, so the split is a catalog/market edition, not a separate serial block. Fitted with the Komatsu 3D95S-W-1 three-cylinder diesel, about 28.7 kW (2.03 L). Operating weight near 3.9 t (about 8,600 lb). |
| 10467-UP | Engine running change - 3D95S-W-1C arrangement | Engine running change to the 3D95S-W-1C arrangement inside this same PC40-5 serial range. Confirmed by the factory parts catalog structure for this model, which lists a full engine parts section under this exact machine and serial break. |
| 12209-UP | Engine running change - 3D95S-W-1D arrangement | Later engine arrangement change inside the same PC40-5 8501-UP range. Confirm with dealer - only seen in aftermarket cross-reference parts listings, not an independent factory serial-break source. |
| 13618-UP | Engine running change - 3D95S-W-1E arrangement | Latest documented engine arrangement change inside the PC40-5 8501-UP range. Confirm with dealer - only seen in aftermarket cross-reference parts listings, not an independent factory serial-break source. |
Frequently asked questions
What engine does the Komatsu PC40-5 (S/N 8501-UP) use?
It runs a Komatsu 3D95S / 3D95S-W-1 three-cylinder diesel, naturally aspirated and mechanically injected, rated at roughly 28.7 kW (38.5 hp) from about 2.03 L displacement. Later machines in the 8501-UP range carry running changes to the -1C, -1D, and -1E arrangements of the same engine family. A few aggregators list other engine codes for this model, but they are not well corroborated for this exact serial range, so confirm the arrangement off the block's engine tag before ordering parts.
What is the operating weight of the PC40-5 (S/N 8501-UP)?
Operating weight runs close to 3.9 t (8,620 lb) in standard trim. Published figures for this class run up to about 4.3 t (9,500 lb) depending on cab style, undercarriage, and track shoe configuration, so treat the exact number as approximate and check the machine's own nameplate.
What replaced the Komatsu PC40-5?
The PC40-6 followed it in Komatsu's compact excavator line, with the Dash-7 generation PC40-7 coming after that. The model number itself continued later in the reduced-tail-swing PC40MR and PC40MRX lines and the current PC40R-8.
What PC40-5(S/N 8501-UP) owners discuss
What engine powers the PC40-5(S/N 8501-UP), and does it have any quirks worth knowing?
This is a naturally aspirated, mechanically injected Komatsu diesel from the 3-cylinder family. Sources cite it variously as the 3D94 or the 3D95S-W-1, and the engine tag on the block is the only reliable way to confirm the exact code on a given serial. Some parts catalogs cross-list a 4-cylinder 4D94-1 for later PC40 variants, so don't assume that engine without checking the plate first. No electronic engine controls on this generation: it's a pure mechanical fuel system, so there's no engine ECM or fault codes to chase. Cold starts rely on glow plugs. Weak plugs or a tired glow relay show up as hard starting or white smoke on cold mornings before the engine settles.
How does the hydraulic system behave, and what should I expect running multiple functions at once?
Machines of this vintage typically run a simpler gear-pump, open-center hydraulic circuit rather than the closed-center, load-sensing system Komatsu put on later PC40 variants. Expect some bogging or slowdown combining travel with boom and swing at the same time. That's normal for an open-center system splitting flow across functions, not necessarily a pump problem. If hydraulics go completely dead after the machine has sat idle a few days, check the pump drive coupling before condemning the pump: loosen a pump output line and bump the engine over briefly to confirm the coupling is actually turning the pump. Also rule out a stuck lockout or safety lever before opening up the hydraulic system. Have a dealer verify pump and coupling condition before a full teardown.
What undercarriage and travel motor wear should I expect?
Rubber track spec is commonly listed around 400 mm (15.75 in) width with roughly a 72.5 mm pitch, but real-world steel track dimensions and link pitch on individual machines have been reported to vary from the catalog spec. Measure the old track directly before ordering a replacement rather than trusting the book number alone. The final drive and travel motor are a known wear point: leaking case seals show up as fluid puddling under the motor and gradually progress to slow, uneven, or one-sided track travel. Aftermarket replacement final drive assemblies are commonly stocked for this exact model, which confirms it as a regular service item rather than a rare failure. Have a dealer or qualified tech verify final drive condition before it fails completely and damages the travel gearing.
Are swing bearing and bucket pin/bushing wear common complaints?
Yes. Like most excavators this size, the swing bearing and the boom, arm, and bucket pin-and-bushing joints wear steadily with use and are routine service items, not defects. Replacement swing bearings are cataloged specifically for this model, which confirms it as a normal wear-and-replace part on higher-hour machines. Watch for play or a knocking sound in the bucket linkage as the first sign bushings need attention, and feel for play in the swing circle during rotation. Keep grease intervals current. Most premature bushing wear owners trace back comes down to skipped greasing, not a design flaw. Have a dealer verify swing bearing bolt torque and play before returning a machine with reported swing knock to full service.
What causes no-start or hard-start complaints on this machine?
This generation has no engine ECU, so a no-start isn't an electronic engine fault. It's almost always battery, ground, starter, or glow plug circuit. Typical troubleshooting order: check battery voltage and terminal corrosion first, then check for voltage at the starter solenoid signal wire while cranking. Full voltage at the solenoid with no response points to a bad solenoid or starter motor. Also check for a hydraulic lockout or safety lever switch wired into the start circuit. A machine that won't crank with the lockout lever up is functioning as designed, not broken. For cold-weather no-starts, check for an open circuit or short at the glow plug terminals and confirm the glow relay has power and ground. Have a dealer verify wiring and relay function before replacing the starter outright.
Is overheating a known complaint on hot days?
Owners of this size and era of Komatsu mini-excavator have reported overheating in hot weather, usually traced to a small radiator and oil cooler package that struggles once the fins pack with dirt and debris. Cleaning the radiator and oil cooler screens resolves most cases. Check coolant level and fan belt condition at the same time. If overheating continues after a thorough cleaning, have a dealer check the thermostat and coolant system rather than assuming head gasket or engine damage. Exact cooling package can vary by configuration, so don't assume every unit behaves identically.
What should I check before buying a used PC40-5(S/N 8501-UP)?
Confirm the serial number is a US or domestic unit rather than a grey-market import, since parts sourcing gets harder on grey-market machines. Read the engine tag directly rather than trusting a listing's stated engine code, since sources disagree on the exact engine designation for this model. Check the final drive and travel motor for leaks and uneven track speed, check swing bearing play, and check bucket, arm, and boom pin-and-bushing play for looseness. Run all hydraulic functions together to see how the machine handles combined loads. Some slowdown is normal for this era's hydraulic system, but a dead function is not. Look for fluid puddling under the machine, cracked or weeping hoses (expected on a machine this age), and overall undercarriage condition. Have a qualified tech run a full pre-purchase inspection before you commit, especially on hydraulics and final drives.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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