Description

Komatsu PC340-6K, PC340LC-6K, PC340NLC-6K Workshop Manual

If you’ve ever wasted a Saturday torquing main bearing caps to an aftermarket spec that turned out to be for a different engine family, you know exactly why I’m writing this. The Komatsu PC340-6K, PC340LC-6K, PC340NLC-6K Workshop Manual is the real deal – original factory print, not a third-party rehash. I’ve been turning wrenches for 28 years, and I’ve seen enough stripped threads and blown seals from bad data to last me two lifetimes. This manual runs 738 pages and covers serial numbers K30001 and up. It’s the same binder that sits on a dealer tech’s bench. No shortcuts, no translations from a language nobody speaks.

What the OEM Manual Covers – Section 10 and Beyond

This workshop manual is organized into standard Komatsu sections. You’ll find the general section (00) with safety and specifications, troubleshooting section (01), then the heavy hitters: section 10 covers the engine – specifically the SA6D114E-1 power plant. Section 20 handles the power train. According to the revision list, pages like 10-1 through 10-153 detail everything from cylinder head removal to fuel injection pump timing. Need charge pressure for the turbo? That’s in the engine section. Don’t expect a one-page cheat sheet – this is the full factory procedure with measured clearances and wear limits.

Torque Specs You Can Trust – Stop Guessing

Every fastener on these machines has a specific torque value, and the manual lists them in foot-pounds (Imperial units, as we work in North America). The aftermarket manuals I’ve seen often copy values from older models or skip the tightening sequence altogether. Page 10-38 in this manual shows the cylinder head bolt tightening pattern and torque. You’ll also find the final torque angle if applicable. I’ve had to re-do head gaskets because a guy used a generic spec – it leaks, then the whole jobsheet goes sideways. This manual eliminates that risk.

Does This Manual Cover the Hydraulic System?

Yes – and it does it the right way. Komatsu splits hydraulic systems across multiple sections (pumps, control valves, cylinders). The book includes pressure test points, relief valve settings, and disassembly procedures for the main pump. If you’re chasing a drift in the boom or weak swing brake, you’ll find the factory diagnostic flow chart. No guessing which port to tap – it’s drawn out in the schematics. Just be prepared to read the notes: Komatsu includes warnings about using the correct special tools, like the pinion gear puller, on certain pages.

3 Reasons to Choose OEM Documentation Over Aftermarket

• The wiring diagrams are original Komatsu – not redrawn by someone who thinks all colors are “red” and “black”.
• Every torque spec and clearance has a revision date. When Komatsu updates a spec, they issue a new page (see the list of revised pages in the front). Aftermarket reprints never include those updates.
• Safety warnings are manufacturer-vetted. For example, the manual tells you to disconnect the battery before working on the ECU – not just “be careful”.

Audience: Who This Workshop Manual Serves

This isn’t a “light reading” book. It’s for the guy or gal who has their excavator torn down in the yard and needs the pin bore diameter before ordering new bushings. Fleet mechanics who manage a mix of Komatsu iron will find the cross-reference of part numbers useful. Home-shop owners who do full undercarriage rebuilds will get the track adjustment procedures and final drive overhaul steps. Beginners should pair it with the Manual Transmission fundamentals if they’re not familiar with powershift transmissions used in some applications – but the basics are all here. For complete drivetrain understanding, also check the Manual Transmission section in a separate publication if needed.

Source Validity – Factory Print, Not a Copy

Every page in this PDF carries the original Komatsu part number (EEBM000804) and revision marks. I’ve seen “factory reprints” that are just scanned copies of copies – the scale is off, the torque values are pixelated, and the fold-out diagrams are impossible to read. This manual came from the Komatsu publication vault. The cover shows “SHOP MANUAL” and the machine models exactly as printed. If you’ve ever compared a genuine manual to a knockoff, you know the difference within ten seconds. This is the genuine article.

Frequently Asked Questions

Does this manual cover the PC340-6K with the SA6D114E-1 engine?

Yes. The engine section (10) covers that engine completely, including overhaul specifications and turbocharger service.

What about the PC340LC-6K and PC340NLC-6K variants – are they the same manual?

This single manual covers all three models. The differences between standard, long-track, and narrow long-track are noted in the specifications and undercarriage sections. Page 00-2-1 lists the serial number breaks.

I have a different Komatsu model – will this help me?

Probably not for the specifics, but the general diagnostic procedures and safety warnings are similar across Komatsu excavators. For your exact machine, look for its own workshop manual. We carry a large collection: Komatsu PC340-6K PC340LC-6K PC340NLC-6K Operation Manual, Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual, and Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual are all factory original.

How do I know the torque values are correct for my machine’s serial number?

Komatsu lists the applicable serial numbers on the title page (K30001 and up for all three models). If a revision changes a torque specification, it’s marked with a revision symbol on that page. Always check the “List of Revised Pages” at the front of the manual to see which pages have been updated. That level of traceability keeps your work safe.

You’ve got a machine that needs a full rebuild, or maybe you’re just swapping a hydraulic pump. Either way, you need the numbers that come from the factory, not some internet forum consensus. Access the Factory Manual and get the full 738-page OEM workshop manual in your hands – or on your tablet – before you turn another bolt.

• Komatsu PC340-6K PC340LC-6K PC340NLC-6K Operation Manual
• Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual
• Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual