Komatsu PC300LC-7L Excavator Parts Catalog PDF – Serial A85001 & Up

Description

Komatsu PC300LC-7L Parts Catalog — Serial A85001 and Up

This is the complete illustrated parts catalog for the Komatsu PC300LC-7L hydraulic excavator, covering machines from serial number A85001 onward. Whether you are ordering a replacement part, verifying a component number before a rebuild, or identifying what changed between production runs, this PDF gives you the exploded-view diagrams and part number tables you need — organized the same way the dealer parts system is.

The catalog spans every major system on the machine: engine, cooling, fuel, electrical, hydraulics, swing circle, travel, undercarriage, work equipment, operator compartment, and the main frame. Each section breaks assemblies down into their individual components with reference numbers keyed to clear line drawings. If you maintain, repair, or restore a PC300LC-7L, this is the reference that tells you exactly which part goes where.

File Details

• Manual Type: Illustrated Parts Catalog
• Brand: Komatsu
• Model: PC300LC-7L
• Serial Number Range: A85001 and up
• Language: English
• File Format: PDF
• Page Count: Approximately 596 pages

Chapters Covered

The catalog follows Komatsu’s standard parts numbering structure, so each assembly is easy to locate whether you are browsing the PDF or cross-referencing a part number:

• Engine (A-000) — Cylinder head, rocker lever, valve cover, crankcase breather, turbocharger and oil piping, air intake, exhaust manifold and connection, cylinder block, front gear cover, oil pan, vibration damper, piston and connecting rod, flywheel housing, crankshaft, camshaft, lubricating oil pump, oil filter and cooler, fuel pump piping, fuel injector and piping, fuel filter, injection pump, water pump, thermostat, fan drive, alternator, starting motor, sensors, gasket sets, and complete engine assembly
• Engine Related Parts (B-000) — Engine mounting, air cleaner connection and filter elements, muffler, fuel control electric governor, speed sensor, electrical wiring harness, heat shield, cooling fan, main pump connecting parts, damper disk and tubes, pre-fuel filter, engine drain hose, and preventive maintenance clinic parts
• Cooling System (C-000) — Radiator with air conditioner, aftercooler and condenser, radiator piping and sub tank, aftercooler piping, and radiator fan guard
• Fuel Tank and Related Parts (D-000) — Fuel tank, fuel lines, water separator, and pre-fuel filter configurations
• Electrical System (E-000) — Batteries, wiring harness and clips, starting harness, main harness, engine clips, battery case side, front work lamp, junction connectors, additional work lamps, rear work lamp, beacon, horn, and travel alarm
• Hydraulic System (H-000) — Hydraulic tank, main valve and all valve spools, pressure compensation valves, suction and safety valves, relief valves, LS divider valve, pump merge divider, self pressure reducing valve, back pressure valve, boom and arm drift prevention valves, main pump front and rear cases, cylinder blocks, PC valves, LS valve, pressure sensing pilot valve, suction line, delivery line with inline filter, oil cooler line, return lines, drain lines, boom lines and hoses, arm and bucket lines, arm lock valve, attachment lines, travel lines, swing lines, LS lines, EPC valve, solenoid valves, accumulator, selector valve, PPC main lines, and pressure switches
• Main/Revolving Frame and Related Parts (J-000) — Revolving frame covers and gaskets, boom foot pin, and related mounting hardware
• Operator Compartment and Control System (K-000) — Operator seat and seat belt, seat rear covers, cab assembly and windows, cab door and locks, wiper and lamps, radio and speakers, monitor system, floor frame and mounts, PPC valves for travel and work equipment, multi-pattern valve, model selection switch, air conditioner duct, hoses, condenser, compressor, and blower assembly
• Guard (M-000) — Hood, machine cab frame, left and right side doors, partitions for engine room and radiator, upper cover, battery case, hand rail, rear view mirrors, counterweight, and under covers for the revolving frame including side cover and tool box
• Swing Circle and Related Parts (N-000) — Swing circle, swing machinery, swing motor complete assembly, drive shaft and cylinder block, relief valve, and swivel joint connecting parts
• Travel and Lower Piping (P-000) — Travel piping, travel motor motor case, motor and brake, cross over relief valve, and final drive
• Under Carriage (R-000) — Front idler, idler cushion, track roller, carrier roller, track shoe assemblies in 600 mm, 700 mm, 800 mm, and 850 mm widths, track link assembly, track frame, center guard, and full roller guard
• Work Equipment (T-000) — Boom 6.5 M STD, boom arm cylinder line, boom lubricating line, boom bucket cylinder line, boom cylinder pin and working lamp, boom lines for additional piping, boom clamps, boom cylinder, arm cylinder, bucket cylinder for 3.2 M and 4.0 M arms and 2.6 M arm, arms in 2.6 M, 3.2 M, and 4.0 M lengths, arm pins, bucket link, and spacers
• Marks and Plates (U-000) — Decals and plates, logo plate, Power Plus plate, load rating plates, top guard plates, air cleaner plate, accumulator plate, power source plate, and multi-pattern decals
• Accessory (V-000) — Spare parts kit including filters, belts, gaskets, O-rings, and fittings

This Komatsu PC300LC-7L parts catalog is not a service manual — it is the illustrated parts reference that lets you identify and order the exact component you need. Each assembly is shown as an exploded-view diagram with numbered callouts linked to a table listing the Komatsu part number, description, and quantity required. That structure makes it straightforward to drill down from a major assembly to an individual bolt, seal, or sensor without guessing.

How This Catalog Helps You

Ordering the wrong part is expensive and slow. This PDF eliminates that problem by showing you exactly how each assembly is put together and which part number belongs at each position. The diagrams are line drawings with reference numbers — the same format used in Komatsu’s parts system — so you can match what you see on the machine to what is shown in the catalog.

For anyone rebuilding a hydraulic valve, resealing a cylinder, replacing undercarriage components, or tracking down an electrical connector, the exploded views make the job faster. You can verify a part number before calling the dealer, confirm that a superseded number is correct for your serial range, or simply understand how a component is assembled before you take it apart.

Who This PDF Is For

This parts catalog is written for equipment owners, fleet maintenance managers, independent repair shops, and parts counter staff who work on the Komatsu PC300LC-7L. If you need to identify a part visually, confirm a number for a machine in the A85001-and-up serial range, or build a parts list for a repair job, this is the reference that gets it done.

Because it covers the full machine — from the engine through the hydraulic system, swing circle, travel motors, undercarriage, and work equipment — you do not need separate documents for different systems. One PDF covers the whole machine.

Get Instant Access

The Komatsu PC300LC-7L Parts Catalog is delivered as a PDF download immediately after payment. There is no shipping, no waiting, and no physical book to keep track of. You can open it on a laptop in the shop, a tablet on the job site, or a phone at the parts counter. Print the pages you need for a specific job, or keep the entire catalog on your device for quick reference.

IMAGES PREVIEW

Every diagram and part number is right there — ready when you need to order a part, plan a repair, or verify a component. Download your copy today and have the complete Komatsu PC300LC-7L parts reference at your fingertips.