Komatsu PC340NLC-7K Parts Catalog – 723-Page OEM Reference

Description

I’ve seen guys order a part from a generic catalog, get the wrong cushion mount, and have the engine sitting crooked. That costs you a full day. Komatsu PC340NLC-7K Parts Catalog fixes that. It’s 723 pages of OEM part numbers and exploded diagrams straight from Komatsu. Not an aftermarket reprint. Not a PDF someone scanned from a third party. This is the same document the dealer parts counter uses.

Engine Related Parts – SAA6D114E-2A-KU

Section B0 ENGINE RELATED PARTS (030000) covers everything from the engine mounting to the muffler and electric governor. Page 030010 shows the engine mounting hardware with part numbers like 23S-01-11140 for the cushion and 207-01-61150 for the stopper. If you need the air cleaner connection or the damper, it’s all in there. No flipping through vague illustrations. Each part has a callout and a Komatsu number. You can order with confidence – not guess.

Cooling System and Fuel Tank: Factory Diagrams

Section C0 COOLING SYSTEM (060000) and D0 FUEL TANK AND RELATED PARTS (090000) give you the exploded views for the radiator, fan, and fuel tank assembly. The fuel section includes the tank, lines, and mounting brackets. For a machine that’s been sitting in a field for years, these are the pages that save you chasing generic parts that don’t fit. You get the exact gasket, strap, or hose clamp by part number.

Electrical System: Part Numbers You Can Trust

Section E0 ELECTRICAL SYSTEM (120000) is where most aftermarket catalogs fail. They list a generic alternator or starter. This manual gives you the specific Komatsu part for your PC340NLC-7K serial range K40001-UP. Whether it’s the main harness, sensors, or the battery box, you get the correct options and quantities. One call to the parts counter and you’re done.

Why 723 Pages of Specs Matter

You might think a parts catalog is just a list of numbers. But 723 pages means every nut, washer, clip, and bracket is accounted for. The table of contents alone is a map: H0 HYDRAULIC SYSTEM, J0 MAIN/REVOLVING FRAME, K0 OPERATOR’S COMPARTMENT, N0 SWING CIRCLE, R0 UNDER CARRIAGE, T0 WORK EQUIPMENT, and more. That’s 16 major sections. For a excavator that size, you need to know which hydraulic line uses which O-ring. This catalog has it. I’ve used Komatsu factory documentation for over 28 years. There’s no substitute.

Don’t waste money on third-party catalogs that bundle multiple models into one PDF and hope you find the right part. That’s how you end up with a fuel sender that doesn’t match your tank. This catalog is serial-number specific: PC340NLC-7K S/N K40001-UP. The engine section is for SAA6D114E-2A-KU ENGINE S/N 46143493-UP. That level of specificity is what keeps your machine running.

Does This Catalog Cover the Hydraulics?

Yes. Section H0 HYDRAULIC SYSTEM (150000) is a major chunk of the book. You get the pump, control valves, cylinders, and swivel joint with full part breakdowns. For the travel and lower piping, see section P0. The swing circle and undercarriage are separate sections. Everything you need to rebuild a machine from the ground up is here – as long as you pair it with the Komatsu PC340NLC-7K, PC340LC-7K Service Manual – OEM Factory Specs for torque specs and procedures.

Source Authenticity: OEM vs Aftermarket

You want me to be blunt? Aftermarket parts catalogs are often scanned from worn-out dealer copies, with blurry numbers and missing pages. This is a direct digital release – the same PDF Komatsu issued. The page numbers, font, and callouts are factory-original. If you’ve ever tried to read a grainy part number on a third-party manual, you know the frustration. This catalog eliminates that. For background on diesel engine architecture, you can check this Wikipedia article on diesel engines or this Wikipedia article on diesel engines. But for actual repair work, trust the OEM.

For the operator’s guidance, get the Komatsu PC340NLC-7K, PC340LC-7K Operators Manual – OEM Specs. And if you need the full service procedures, the Komatsu PC340NLC-7K, PC340LC-7K 2002 Workshop Manual – OEM Factory Specs is a must-have companion.

Does this manual include torque specifications?

No. This is a Parts Catalog, not a service manual. Torque values are in the Service Manual.

Can I use this to order parts for a PC340LC-7K?

This catalog is specifically for PC340NLC-7K (S/N K40001-UP) with the SAA6D114E-2A-KU engine. The PC340LC-7K may share some parts but check the serial number range. For a machine outside that serial range, you need a different catalog. The key is verifying your machine’s serial number against the engine section. I’ve seen guys buy a parts manual for the wrong series and end up with a $1,200 cylinder that doesn’t fit. The first page of this catalog lists the applicable serial numbers – page 1 of 723. Look at it before you order anything. The table of contents alone covers 16 sections from engine to work equipment. If your machine falls within K40001-UP and the engine is 46143493-UP, this is the one. If not, find the correct manual. There’s no shortcut here.

Stop guessing which part goes where. Access the Factory Manual and get the exact Komatsu part number every time.