Description

Komatsu PC240-6K Parts Catalog – 986 Pages of Factory Part Numbers

Some guys think a parts catalog is just a list of numbers you can Google. That gets you aftermarket junk that doesn’t fit, or you end up with a bolt that’s two threads short. I spent 28 years torquing head bolts and chasing down the right part for equipment that’s down. You need the Komatsu PC240-6K Parts Catalog – the actual OEM book, 986 pages, straight from the factory that built the machine. No guessing, no generic cross‑reference that leaves you holding a wrong seal on a Friday afternoon.

ENGINE RELATED PARTS – Turbocharger Clamp to Damper

This manual opens with the engine room. You’ll find exploded views for the turbocharger clamp (part 20Y-01-K1270 for the left-hand side), engine mounts split by serial number breaks (K30001‑K31999 vs. K32000‑), and the wiring harness for the engine itself. Section headings like “FUEL CONTROL” and “DAMPER” tell you exactly where to look. If you need the clamp for a K30001‑K31999 machine, page 030010 gives you the part number, the bolt (01010-51020 or 01010-51012 depending on serial range), and the washer. No hunting through a generic database.

Cooling System – Radiator, Piping, Fan Guard Variants

Cooling failures kill engines faster than anything else. This catalog covers the rigid‑type radiator, piping grouped by serial, and the fan guard – including the version for machines with air conditioning. Each assembly is drawn with a reference number that points to the exact Komatsu part. If you’re rebuilding a cooling stack on a K32000‑ machine, you get the fan and fan guard page specific to that range. That kind of precision saves a second trip to the dealer.

Fuel System – Tanks and Lines with Water Separator

The fuel tank section is broken into three serial ranges: K30001‑K31999, K32001‑K34000, and K34001‑. That matters because brackets, sending units, and tank shape changed. The fuel lines are listed “WITH WATER SEPARATOR” – the separator itself is a separate item. If you’re replacing the fuel line on a K32001 machine and you grab the line for the earlier range, you’ll be fighting a 10‑degree bend that doesn’t match. This catalog kills that headache.

Electrical System – Wiring Diagrams and Battery Options

Wiring is where aftermarket manuals fall apart. This OEM book dedicates four full pages just to the wiring harness (WIRING 1/4 through 4/4), split by serial. You get the dry battery, large‑capacity battery, work lamps (boom, rear, engine room), and the horn. Each lamp variant – standard, less, additional – has its own part number. If you’re rewiring a PC240-6K that’s been butchered by a previous owner, page references like WIRING 2/4 for K32000‑ let you trace the harness back to the connector pins.

Hydraulic System – Main Valve Actuators and Pump Breakdown

Hydraulics on these machines are not simple. The catalog lists the main valve connecting parts, valve brackets, sensors, and then an eye‑glazing number of actuator sub‑sections: “MAIN VALVE 1 ACTUATOR 1/11” through “MAIN VALVE 2 ACTUATOR 14/14.” That level of granularity means you can find the actuator seal kit for the third spool on a K30001 machine without flipping through 50 pages. The main pump section (HPV 95 95 BARO) is broken into 10 sub‑parts. If you need the piston slipper kit for the #2 pump, the exploded view tells you the exact Komatsu part number.

Who Needs This Catalog?

If you own a Komatsu PC240-6K, or you’re a shop that rebuilds these excavators, this book is your parts bible. DIY owners who do their own maintenance – track tension, hydraulic filter changes, engine rebuilds – will save the cost of the manual on the first mistaken part they don’t buy. Professional mechanics can stop wasting billable hours chasing cross‑references that are wrong. And shops that stock parts for Komatsu equipment can use it to verify inventory accuracy. For example, when a customer brings in a PC240-6K with a blown damper (K32000‑ range), you pull the 030160 page and order 20Y-01-x. Not a universal “torsional damper” that might work.

Why OEM Beats Aftermarket

I’ve seen aftermarket parts catalogs that reprint Komatsu numbers with typos. One digit off and you’re installing a turbocharger clamp that’s too small. This document is a scan of the original Komatsu book, not a re‑typed PDF. The page headers carry the serial range. The part numbers are unchanged. The diagrams retain the factory reference numbers. If you are ordering a fuel line or a wiring harness, this document is your insurance against buying the wrong part. Pair it with this Wikipedia article on diesel engines to understand the underlying systems, but for part numbers, stick with OEM. For more Komatsu equipment, check the FAI 67-80DT Hydraulic Steering Piston Parts List or the Komatsu WH609-1 WH613-1 Parts Catalog | 347 Pages OEM. And if you work on smaller excavators, the Komatsu PC14R Parts Catalog – Order Correct Parts Fast is just as thorough.

Stop searching through forums and aftermarket catalogs that show a generic drawing. Get the actual factory breakdown for your PC240-6K – engine, fuel, cooling, wiring, and hydraulics – all 986 pages of it. Access the Factory Manual and start ordering the right part the first time.