Komatsu PC1250-7-W1 Parts Book SN 20001-Up – Illustrated Parts Catalog PDF

Description

Komatsu PC1250-7-W1 Parts Book SN 20001-Up

This illustrated parts book is the reference catalog for the Komatsu PC1250-7-W1 hydraulic excavator, covering machines from serial number 20001-Up in Overseas Version configuration. Every figure groups the components for a specific assembly alongside the matching part numbers, so a mechanic, parts counter operator or rebuilder can identify the exact part needed without guesswork. The engine section belongs to the SAA6D170E-3E-8, engine serial number 310001-Up, which runs through the same document under its own chapter header.

The content is organised by machine system rather than by part number. That means the reader starts from a system chapter – fuel, cooling, electrical, hydraulic, undercarriage, work equipment – and drills into the specific sub-assembly illustration, then reads the part number from the table on the facing page. This is the practical layout a workshop actually uses when a machine is torn down and something needs replacing.

File Details

• Manual type: Illustrated Parts Book / Parts Catalog
• Brand: Komatsu
• Machine model: PC1250-7-W1
• Machine serial coverage: 20001-Up (Overseas Version)
• Engine model: SAA6D170E-3E-8
• Engine serial coverage: 310001-Up
• Language: English (figure callouts include Japanese annotations)
• Page count: Approximately 970 pages
• File format: PDF

Chapters Covered

The document opens with a master index of chapter sections and part-number page references, then works systematically through the whole machine:

• SAA6D170E-3E-8 engine (S/N 310001-Up) – cylinder head, front hanger, rocker arm housing cover, head cover related parts, air intake manifold, heater switch, air cleaner mounting, air cleaner piping (tropical specification), exhaust manifold, turbocharger (S500) mounting and inner parts, heat shield, muffler bracket, thermostat housing and blind plug, cylinder block, cylinder block blind covers and sensors (VHMS specification), front cover and mounting, idler gear, camfollower covers and breathers, oil filler, oil pan and suction tube variants, oil level gauge variants, flywheel housing, flywheel, engine mounting (standard and KP-1A specification), crankshaft, damper, piston, crank pulley variants, rocker arm and housing, camshaft, rear power take off, oil pump, oil filter, oil cooler and mounting, fuel injection pump mounting and inner parts, fuel injection pump repair kits, injection bracket and piping, fuel injection pump drive, fuel filter and water separator variants, fuel injector, fuel return, fuel control valve variants and their inner parts, wiring support, water pump, air vent, tension pulley variants, corrosion resistor, alternator mounting and inner parts (50A and 90A), alternator drive, starting motor mounting (11KW, standard and sea water-resistant specification), starting motor inner parts across serial splits, wiring, air compressor mounting, air compressor inner parts, air compressor gasket kit, cylinder head gasket kit, cylinder block gasket kit, water pump gasket kit, name plate and caution plate sets, muffler drain piping, muffler, pre-cleaner, spare parts, after cooler, ejector tube unit, fan belt, exhaust pipe, air connection hose, service indicator and fuel filter for extremely bad fuel specification
• Engine related parts
• Cooling system – radiator and oil cooler, tropical weather specification, guard variants, lubrication piping, mount and cushion parts, fan mount and guard for air-conditioned and non-air-conditioned machines, tropical fan mount, after cooler shroud and fan mount serial splits, air piping, wind-braker serial splits, lubrication and reserve tank, mount and lubrication piping, radiator wind-braker, air piping, after cooler wind-braker, P.T.O. oil cooler and starter cooler
• Fuel tank and related parts – standard tank, sandy and dusty terrain specification, quick charger specification, fuel lines across water separator / cold weather A / additional fuel filter / by-pass / clamp variants
• Electrical system – battery (wet and dry, C200), starting harness, main harness for standard, loader, high cab and loader variants, main harness clip layouts for left deck, main beam and right deck, battery case wiring, working lamp and circuit breaker wiring, VHMS sensor harness and bracket serial splits, VHMS less parts, VHMS additional parts, VHMS controller parts, auto grease timer wiring, beacon, VHMS amplifier, VHMS sensor, VHMS wiring harness, VHMS controller, flash light and travel alarm
• Air system – air piping across grease pump configurations, air tank (standard, EU, cold weather A and auto grease variants), horn valve, air valve, air tank drain, mounting parts, auto grease (grease pump, reel and main lines, boom cylinder lines, boom lines, boom main lines, arm lines, arm lines for semi-long arm, pressure switch and plate)
• Hydraulic system – hydraulic tank (standard and sandy and dusty terrain specification), return filter, relief valve serial splits, partition, main valve No.1, No.2 and No.3 valve assemblies with joint parts and loader / long arm variants, valve stand, No.3 valve and line filter, main pump joint parts for No.1, No.2 and No.3 pumps (including cold weather specification), gear pump joint parts, suction lines, tank line variants, delivery lines for No.1 and No.3 pumps with serial splits, delivery lines to No.1, No.2 and No.3 valves, piping and valve branch serial splits, oil cooler lines (tank line, revolving frame side, tropical specification, hose), return lines for No.1 valve (standard and tropical), No.2 valve, No.3 valve, after cooler motor piping serial splits and VHMS variant, swing suction (standard and tropical), drain lines, pump drain piping, boom lines (boom front piping and No.1 valve, No.2 valve, No.3 valve, boom lines tube and front bracket), arm lines (No.1, No.2 and No.3 valves), bucket lines, valve service port plug, bottom dump bucket line for loader, boom foot bracket, travel lines, straight travel piping, swing lines, O.L.S.S. lines (pump-valve and main pump with cold weather variant), solenoid valve on hydraulic tank and revolving frame sides, solenoid valve line, shuttle valve, PPC lines joint across joint-deck, hose-deck, loader, high cab and long arm variants, PPC pump lines (pump delivery serial splits, cold weather, PPC accumulator, pilot delivery and PPC lock solenoid), PPC travel line, PPC straight travel lines, PPC arm lines, PPC boom and bucket lines, PPC swing lines, PPC heavy lift lines for standard and loader
• Main / revolving frame and related parts – revolving frame, loader specification, high cab loader specification, cold weather A specification, auto grease specification, loader cold weather serial split, boom foot pin, boom cylinder pin, boom foot pin (auto grease)
• Operator’s compartment and control system – operator’s seat (suspension type), seat belt (78mm and 48mm wide), rear cover variants for air conditioner, 12V power source, big wind air conditioner and circuit breaker, luggage box net, operator’s cab across quarry specification, pull-up window, cold weather A specification, front window, front lower window, roof window, door, door lock, open lock, wiper and room lamp serial splits, radio wiring, work lamp and step lamp, accessories, bolt, wiring, monitor system, cover, duct, front guard, floor mat, lower wiper, window washer (standard and high cab), top guard Level2, air conditioner (receiver tank, compressor, hose joint and high cab variant, heater hose and high cab variant, lower tank piping, duct and drain hose, duct with drain hose and blower for big wind), fire extinguisher, first aid box, floor frame across serial splits and loader / high cab variants, travel control, foot rests, base, electrical, big wind air conditioner electrical, loader electrical, floor frame clip, rear frame and big wind rear frame, lever and valve L.H. and R.H. across standard, loader and EU variants, console upper L.H. across air conditioner, big wind air conditioner with radio and loader variants, console lower L.H., console under L.H. serial splits, console R.H., air conditioner and foot cover (standard and big wind), PPC (1/2 and 2/2 with high cab loader variants), PPC clamp, P/T block and seal, 12V converter, VHMS controller and VHMS controller less, switch box serial splits and auto grease, air conditioner duct serial splits, lever knob serial splits, floor mount, model selection switch, cover, cab cover variants for low cab, low wiper, front guard, high cab and cab mount
• Guard – hood (standard, EU, tropical weather serial splits, tropical and sandy and dusty terrain, perforate), frame (standard and with additional fuel filter), left side cover (rear side, EU, tropical), left side cover (front side, EU, blade for EU), right side cover duct (standard, EU, tropical), partition cover assemblies and machine cab variants including tropical weather and with additional fuel filter, cover machine cab, right side case (standard and auto grease), handrail (standard and step), rear view mirror L.H. and R.H., counter weight (17400 KG) with serial splits and EU variant, weight mounting, under cover (revolving frame) deck R.H., deck L.H. and center with cold weather variant
• Swing circle and related parts – swing circle, swing machinery front and rear with serial splits, tropical weather and cold weather A variants, swing motor front and rear, swivel joint
• Travel and lower piping – travel piping (center frame side, motor side)
• Under carriage – track shoe double grouser with hole in 700mm and 1000mm widths, center frame (standard and with under cover), track frame L.H. and R.H., front idler L.H. and R.H. with cold weather variants, idler cushion L.H. and R.H. serial splits, track roller L.H. and R.H. with cold weather variants, carrier roller L.H. and R.H. with cold weather variants, track roller full guard L.H. and R.H., roller guard L.H. and R.H., final roller guard L.H. and R.H., final drive shaft and hub L.H. and R.H. with cold weather variants, final drive first and second carrier L.H. and R.H., final drive third carrier and sprocket L.H. and R.H. with cold weather variants, track frame travel piping motor side L.H. and R.H., track frame under cover, travel piping cover, travel motor guard, step track frame side for 700mm and 1000mm wide shoes
• Work equipment – boom 9.1M for backhoe (standard and auto grease variants), boom pin, lubrication, working lamp, arm cylinder lines, bucket cylinder lines (boom bottom side, boom center side, boom top side), arm and bucket lines hose, blind parts, boom cylinder, boom cylinder lines, arm cylinder, arm 3.4M (standard, quarry, auto grease and quarry auto grease variants), arm 4.5M (standard and quarry), arm less, arm 5.7M, arm 5.4M (auto grease and quarry auto grease), arm lubrication across 3.4M, 4.5M and 5.7M, bucket cylinder hose for 3.4M / 4.5M and 5.7M arms, block for 5.7M arm, bucket cylinder for backhoe across 3.4M / 4.5M and 5.7M arm and loader, bucket link for backhoe (standard, 5.7M arm, limestone specification), work equipment for loader – boom, boom lubrication, working lamp, piping (arm cylinder lines 1/2 and 2/2, bucket cylinder lines 1/2 and 2/2), arm, arm lubrication, bucket cylinder line and cover serial splits, pin, hose (arm cylinder piping), boom cylinder, arm cylinder, bucket cylinder, cover, bottom dump cylinder lines (bottom dump cylinder and piping), bottom dump bucket lines (boom side and arm side), buckets across 5.0M3 x 2050mm horizontal pin, 4.0M3 x 1710mm horizontal pin, bucket less, 3.4M3 x 1591mm horizontal pin, 6.5M3 front bucket horizontal pin for bottom dump, 6.5M3 front bucket vertical pin for bottom dump, 5.0M3 x 2040mm vertical pin for limestone, 5.7M3 front bucket vertical pin for bottom dump, 6.5M3 x 2255mm horizontal pin Type H, 6.5M3 side shroud for bottom dump, side shroud for backhoe bucket Type H, 6.5M3 rear bucket for bottom dump, 5.7M3 rear bucket for bottom dump, side cutter for backhoe bucket
• Marks and plates – English pictorial for EU, English pictorial, English lettering, Spanish pictorial for EU, Russian pictorial, Chinese pictorial, English pictorial for EU serial split, Spanish pictorial for EU serial split, Italian pictorial for EU serial split, Indonesian pictorial serial split, Sweden pictorial serial split, Spanish lettering type, plates for EU serial splits, lifting capacity plate, caution plate battery caution for USA and Puerto Rico, caution plate battery caution Spanish, shift pattern ISO marks for Indonesian, Spanish, German, English, Russian, French, Italian, Chinese and Sweden, shift pattern ISO marks for loader variants, handling mark plate serial split, lifting point decal serial split, boom mark plate (standard and loader), caution plate for LV2 guard front full guard and front full guard with top guard, plate air cleaner double element across Spanish, Chinese, English, English tropical, Sweden, Indonesian, French, Russian, German and Italian, plate by-pass line across English, Chinese, Russian and Sweden serial split, plate 12V power source
• Accessory – spare parts (standard, tropical weather 50A, tropical weather 90A, 50A, 90A, for pre fuel 90A, 50A with water separator and additional fuel filter, 90A with water separator and additional fuel filter, 90A with water separator and additional fuel filter tropical weather serial split), cap and overall, tool
• Miscellaneous – coolant pre heater, grease pump, left side step (standard, high cab and handrail variants), right side step (standard and auto grease), electrical engine heater, flushing and blind parts (flushing parts, upper blind parts, lower blind parts, travel motor blind parts, swivel blind parts)
• Service kit and component parts – air cleaner assembly serial split, swing machinery assembly supply only, final drive shaft and hub supply only, final drive first and second carrier supply only, final drive third carrier and sprocket supply only, shoe bolt and nut service kit, track link supply parts for 96 set, precleaner inner part serial split, rubber antenna, operator’s seat assembly suspension, main pump No.1 across 14 sub-figures, No.2 across 9 sub-figures, No.3 across 16 sub-figures, hydraulic gear pump across 3 sub-figures, boom cylinder for backhoe, boom cylinder for loader, arm cylinder for backhoe, arm cylinder for loader, bucket cylinder for backhoe across 3.4M / 4.5M arm and 5.7M arm, bucket cylinder for loader, bottom dump cylinder for loader, swivel joint, swing motor across 2 sub-figures, fan drive motor, travel motor across case and rear cover / cylinder block and piston assembly sub-figures, main valve for 4-spool No.2 serial splits, 4-spool No.3 and 5-spool No.1, PPC valve for travel and work equipment, safety valve, check valve, grease pump assembly and sub-assembly and grease gun and hose reel, line filter for pump delivery line, oil filter, lubrication filter for power take off serial split, solenoid valve inner parts, pilot relief valve, breather for hydraulic tank, compressor assembly for air conditioner, unit assembly for air conditioner (standard and big wind), cooling unit assembly for air conditioner, blower assembly for air conditioner (standard and big wind), duct for air conditioner big wind, distributor assembly for air conditioner big wind, blower assembly for air conditioner, pre-heater (heater assembly)

What this catalog gives a technician is a serial-number-aware parts identification chain. Where the machine changed mid-production, the book shows both options with the serial break printed directly on the part line – so a machine with serial 20001 does not get the same oil pan, oil level gauge, starting motor, final drive or swing machinery listing as a later unit, and the book keeps those apart. The same applies inside the engine: cylinder head gasket kit contents differ across 310001-310046, 310047-311134 and 311135-Up, and the fuel injection pump inner parts and fuel control valve are split into a standard set and a #310911-Up set for extremely bad fuel specification. Every illustration is grouped the way the machine is actually assembled, so a boom rebuild, a swing motor seal replacement or an undercarriage roller change can all be worked straight from the page.

How to Use This Illustrated Parts Book

Every section follows the same two-page pattern: an exploded or isometric illustration showing the assembly broken down into every component in fitment order, followed by a tabulated parts list giving item number, part number, description, quantity and serial-number option. That layout makes it possible to read an assembly from the outside inward, confirm which of two or three optional configurations applies to a particular machine serial, and then order the item by number. Where a kit exists – gasket kits, seal kits, shoe bolt and nut service kits, repair kits for the fuel injection pump – the kit is listed with its contents and the individual part numbers underneath.

Who This Parts Book Is For

This is a working document for the people who actually turn wrenches on a PC1250-7-W1 – field service technicians, shop rebuilders, independent parts suppliers and owner-operators who want to identify a part themselves rather than describe it over the phone. It is equally useful for planning a repair: pricing out an engine cylinder head job, ordering final drive internals for a serial-matched track frame, checking whether a boom cylinder line uses the standard or loader specification routing, or confirming which of the many oil pan and suction tube options belongs to the machine on the bench. Part numbers, quantity counts and serial break points appear exactly as printed so the identification can be handed straight to a parts counter.

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This Komatsu PC1250-7-W1 parts book for serial number 20001-Up puts the entire illustrated parts catalog in one searchable file – engine, hydraulics, undercarriage, work equipment, cab and everything in between. Having the correct part numbers and the correct serial break on hand is what turns a stalled repair into a scheduled one, and it is what stops the wrong part being ordered, shipped and returned. With an instant PDF download there is no shipping, no waiting on a disc, and no restriction on what device it opens on – a workshop desktop, a laptop in the service truck, or a tablet beside the machine. Print the pages for the assemblies being worked on, keep the rest of the file on file, and every future parts enquiry for this PC1250-7-W1 becomes a number rather than a guess.