Komatsu PC300-8M0 Parts Book PDF – PC300SE-8M0 / PC300LCSE-8M0 Serial J40001 and Up

Description

The Komatsu PC300-8M0 Parts Book PDF is the illustrated parts catalog for the PC300SE-8M0 and PC300LCSE-8M0 excavators, issued for machines from serial number J40001 and up and for the SAA6D114E-3 engine from engine number 26867493 and up. Every figure in the book is a numbered exploded drawing tied to a parts table, so each component in the drawing can be traced to its index number, part number, description, quantity and the serial number range it applies to. This is the reference you use when you need to identify exactly which part sits where on a PC300-8M0 before ordering, replacing or reassembling it.

File Details

• Document type: Parts Book (illustrated parts catalog)
• Brand: Komatsu
• Machine models: PC300-8M0, PC300SE-8M0, PC300LCSE-8M0
• Serial number coverage: J40001 and up
• Engine: SAA6D114E-3, engine number 26867493 and up
• Language: English
• Format: PDF
• Length: 400 pages of exploded views, parts tables and an alphabetical part number index

Chapters Covered

• Engine – exhaust muffler, exhaust muffler drain, exhaust connection, heat shield
• Engine – rocker arm housing and rocker arm, tappet, camshaft, lifting arrangement and bolts
• Engine – vibration damper, crank pulley, front cover, front gear train cover, accessory drive pulley
• Engine – cylinder block, cylinder block cover, breather hose, cabin heater plug, oil level gauge, engine oil pan, engine oil level sensor
• Engine – crankshaft, piston and connecting rod, flywheel, flywheel housing, flywheel mounting
• Engine – water pump and mounting, water outlet connector, coolant inlet connector, thermostat, coolant heater plug
• Engine – engine oil pump, engine oil filter, engine oil filter and engine oil cooler, engine oil cooler
• Engine – fuel filter piping, fuel supply pump and mounting, fuel supply pump support, fuel injector, fuel injection piping, fuel piping, fuel filter, fuel filter cartridge, prefilter, fuel transfer pump, fuel inlet fitting, fuel system accessory
• Engine – cooling fan, cooling fan drive pulley and mounting, cooling fan belt, cooling fan belt tensioner
• Engine – alternator (60 AMP) and mounting, starting motor mounting, starting motor (7.5KW), starting motor (11KW)
• Engine – turbocharger and related parts, wiring harness, electric controller piping, engine controller, engine control module, caution plates, repair service parts
• Engine Related Parts – engine mounting, air cleaner, damper
• Cooling System – radiator and oil cooler, shroud, aftercooler and condenser, radiator piping, sub-tank, related brackets, seals and clips
• Fuel Tank and Related Parts – fuel tank, fuel supply piping, fuel prefilter piping, fuel supply piping clamp
• Electrical System – battery, electric wiring harness (main, working lamp), additional working lamp, horn, travel alarm, rearview camera
• Hydraulic System – hydraulic tank
• Hydraulic System – control valve (7-spool) main body, related parts and valve bracket
• Hydraulic System – piston pump and inner parts
• Hydraulic System – suction piping, delivery piping with inline filter, oil cooler piping, return piping, drain piping
• Hydraulic System – boom piping with bracket and clamp, arm and bucket piping, travel piping, swing piping, LS piping
• Hydraulic System – solenoid valve and related parts, pressure switch block and slow return valve
• Machine Cab – cab body and window, front window, front lower window, roof window, door and door lock, open lock and door catch, wiper and room lamp, rubber antenna, speaker and window washer, roof cover and air intake, pressure valve and grip, KOMTRAX film antenna, monitor and cover, monitor cover, washer hose mounting, luggage plate and cigarette light, air duct, fresh air filter, partition and recirculation air, sub plate and relay, AC controller and KOMTRAX controller, main wiring harness clamp, rear cover
• Machine Cab – floor frame and base, travel control lever, footrest L.H and R.H, floor wiring harness and clamps, ground points, window washer hose, work equipment control lever L.H and R.H, PPC valve for travel, PPC valve for work equipment L.H and R.H, PPC valve mountings, console L.H and R.H, armrest L.H and R.H, AC unit inner parts, AC motor, air conditioner unit and piping, PPC piping for travel valve and work equipment, piping mounting, P.T block, floor seal, KOMATSU mark
• Guard – engine hood, machine cab frame, side cover L.H and R.H, machine cab partition, machine cab cover, battery case, handrail, rearview mirror L.H and R.H, rear under view mirror, counterweight (6372 KG) and mounting, under cover for fuel refill pump
• Swing Circle and Related Parts – swing circle, swing motor, swing machinery
• Travel System and Related Parts – travel piping, travel motor L.H and R.H, carrier L.H and R.H, cover
• Under Carriage – front idler and idler cushion (rustproof spring LV 1), track roller single flange, carrier roller, track shoe assembly (800MM grease sealed type), triple shoe grouser (with holes, 800MM), track frame with under cover, track frame under cover, track roller guard (STD, LC, full length)
• Work Equipment – boom (boom and top pin, arm cylinder piping, lubrication piping, bucket cylinder piping, cylinder pin and working lamp, attachment plug)
• Work Equipment – boom cylinder L.H and R.H
• Work Equipment – arm cylinder
• Work Equipment – shipping parts
• Work Equipment – arm (3.2M), arm bucket cylinder (3.2M), arm bucket link (3.2M), arm pin bucket cylinder hose (3.2M)
• Work Equipment – arm (2.2M), arm bucket cylinder (2.2M), arm bucket link (2.2M), arm pin bucket cylinder hose (2.2M)
• Work Equipment – bucket 1.2M3 horizontal pin type with adjusting, horizontal pin type with adjusting tiger tooth bucket
• Marks and Plates – marks and plates KI, lubrication interval, caution plate (English), KOMATSU logo and additional logo, coolant decal, KOMTRAX plate, decal arm, ROPS plate (English), service instruction (air cleaner), caution plate (1-accumulator)
• Accessory – spare parts, cap and overall, general tool set
• Miscellaneous – fuel refill pump, additional track frame step, blind parts (boom), engine drain hose
• Services Kit – service kit parts (1/2) and (2/2), including seal kits for hydraulic boom, arm and bucket cylinders and the shoe bolt and nut service kit

Read as a whole, the Komatsu PC300-8M0 parts book gives a complete, figure-by-figure breakdown of the machine. Rather than describing how to diagnose a fault, it answers the identification question that follows every diagnosis: which part, in which position, in which quantity, and for which serial number range. Each figure carries numbered balloons that correspond directly to the rows of the accompanying table, so a technician can work from the drawing to the exact part number without guesswork, and then check the quantity column to know how many are needed for a full replacement. The book is organised from the engine outward – engine assembly and its accessories first, then engine related parts, cooling, fuel, electrical and hydraulic systems, then the cab and its controls, the guards and counterweight, swing and travel systems, undercarriage, and finally the work equipment, plates and service kits. The rear of the document carries an alphabetical part number index that maps every listed part number back to its figure number and index number, which is the fastest route when you already know the part number and need to confirm where it fits and what else sits around it.

Engine and Powertrain Coverage in Detail

The engine section of this PC300-8M0 parts book is unusually deep for a machine-level catalog. It covers the exhaust side from muffler and muffler drain through exhaust connection and heat shield, the top end with rocker arm housing, rocker arm and tappet, the camshaft and front cover group including front gear train cover and accessory drive pulley, the cylinder block and its cover, breather hose and cabin heater plug, and the bottom end with crankshaft, piston and connecting rod, engine oil pan, oil level gauge and oil level sensor. Front-end accessories are listed individually – water pump and water pump mounting, water outlet connector, coolant inlet connector, thermostat and coolant heater plug – as are the lubrication group with engine oil pump, engine oil filter, and engine oil filter together with engine oil cooler. The fuel side is broken down into fuel filter piping, fuel supply pump and its mounting and support, fuel injector, fuel injection piping, fuel piping, fuel filter and fuel filter cartridge, prefilter, fuel transfer pump, fuel inlet fitting and fuel system accessories. Cooling fan drive components, the 60 AMP alternator and its mounting, both starting motor ratings and the turbocharger complete the engine picture.

Hydraulics, Undercarriage and Work Equipment

For the hydraulic circuit, the catalog presents the hydraulic tank, the 7-spool control valve with its related parts and valve bracket, the piston pump with its inner parts, and then each piping run in turn: suction, delivery with inline filter, oil cooler, return, drain, boom, arm and bucket, travel, swing and LS. Solenoid valve assemblies, hose and clamp details, and the pressure switch block with slow return valve are all separated into their own figures. Undercarriage coverage addresses the front idler and idler cushion with rustproof spring LV 1, track roller single flange, carrier roller, the 800MM grease sealed track shoe assembly and the triple shoe grouser with holes, the track frame with under cover, and track roller guards in standard, LC and full length configurations. Work equipment is covered in both arm lengths offered – 3.2M and 2.2M – along with the boom cylinder L.H and R.H, arm cylinder, bucket cylinder, bucket link, bucket cylinder hose and pin details, and the bucket options including the 1.2M3 horizontal pin type with adjusting and the tiger tooth bucket version.

Serial Number Ranges Are Marked Throughout

Where a part changed during production, the tables carry serial number notes rather than assuming one part fits all. You will see entries tied to J40001-UP, to defined windows such as J40001-J40014 or J40001-J40017, to J40015-UP, to J40018-UP and to engine number 26867493-UP. That detail is what makes this PC300SE-8M0 and PC300LCSE-8M0 parts book reliable on a mixed fleet, because two visually identical machines from different build ranges can carry different components in the same position.

Get the Part Number Right the First Time

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Ordering the wrong component on a 30-tonne excavator costs more than the part – it costs the downtime of stripping the same assembly twice. This Komatsu PC300-8M0 parts book removes that risk by tying every part to a drawing, a position number, a description and a quantity, and by flagging the serial number ranges where a substitution applies. Use it to identify a single seal or O-ring, to rebuild a hydraulic cylinder from its seal kit breakdown, to check how many bolts or washers a joint takes, or to build a complete parts list before a planned service on a PC300SE-8M0 or PC300LCSE-8M0. The file is delivered as an instant PDF download with no shipping and no waiting, and it opens on a laptop, tablet or phone in the workshop or the office. Print the figure and table you are working from and keep it beside the machine while you work.