Description

Komatsu PC600LC-6 Workshop Manual – 732 Pages of Factory Specs

If you’re tearing into a Komatsu PC600LC-6 – serial numbers 11064 and up – you don’t have time to chase aftermarket guesses. This Workshop Manual is the factory-issued document, 732 pages thick, and it tells you exactly what Komatsu wants you to do. I’ve been turning wrenches since before cab shields had decals, and I can tell you right now: the difference between a rebuild that lasts and one that pukes oil on the customer’s pad is having the genuine OEM torque spec, not some scanned reprint that rounded to the nearest foot-pound. This manual came from Komatsu, not from a third party who never touched a hydraulic line.

Let’s get into what’s actually in it. The table of contents splits into six main sections: General, Structure and Function, Testing and Adjusting, Disassembly and Assembly, Maintenance Standard, and Others. The first thing I check on any excavator manual is the Fuel system coverage – because bleeding air on a common-rail diesel wrong can cost you a pump. Section 20, Testing and Adjusting, has a full sequence: HANDLING EQUIPMENT IN FUEL CIRCUIT, RELEASING REMAINING PRESSURE IN FUEL SYSTEM, MEASURING FUEL PRESSURE, BLEEDING AIR FROM FUEL SYSTEM, CHECK FOR LEAKAGE IN FUEL SYSTEM. That’s five separate procedures just for the fuel side. No generic “tighten to spec” nonsense – it walks you through the pressure release steps so you don’t get a face full of diesel at 10,000 psi.

Engine Valve Clearance – The Factory Way

Every major engine overhaul on the SA6D140E-3 starts with the valve train. This manual includes ADJUSTING VALVE CLEARANCE as a dedicated procedure in the testing section. You get the cold clearance values, the order to turn the engine, the tool requirements – no guesswork. And because it’s OEM, the numbers match what the original Komatsu engineer wrote. I’ve seen aftermarket manuals list a clearance that’s 0.002” off; on a dual-overhead-cam engine that means bent pushrods or burned seats. The 732 pages include a STANDARD VALUE TABLE FOR ENGINE that lists every tolerance Komatsu expects.

7 Systems Covered – Beyond the Engine

This Workshop Manual doesn’t stop at the power plant. Section 10, Structure and Function, breaks down everything: PTO, RADIATOR OIL COOLER, FINAL DRIVE, SWING CIRCLE, TRACK FRAME, HYDRAULIC PUMP, CONTROL VALVE, SWING MOTOR, TRAVEL MOTOR, PPC VALVES, SOLENOID VALVES, BOOM HOLDING VALVE, even the AIR CONDITIONER. For a heavy-equipment mechanic, that means one book replaces a shelf of separate manuals. You want to test the travel deviation? Page calls to the TESTING TRAVEL DEVIATION procedure. Need the hydraulic pressure specs for the control pump circuit? There’s a standard value table in section 20. Every torque value, every clearance, every pressure reading – it’s all straight from Komatsu’s engineering department.

Who Should Use This Manual – And Who Shouldn’t

This is for guys who have already bled a hydraulic system and know the difference between a red shop rag and a brake cleaner. If you’re a home garage enthusiast who’s comfortable with a torque wrench and a multimeter, you can follow this – but only if you respect the safety warnings. The manual starts with a full SAFETY NOTICE section printed on 00-2: wear safety glasses, never work alone without agreeing on the procedure, post UNDER REPAIR signs in the cab. I’ve seen too many DIYers skip the pressure release step on the hydraulic circuit and end up with a broken finger. This manual doesn’t let you skip. For professional shop owners, it’s the insurance policy against liability – when you prove you used the OEM procedure, you cover your ass when a part fails because of wear, not because of a wrong spec.

Source Authenticity – Why OEM Beats Aftermarket

This is the original Komatsu PDF, not a copy of a copy. The file name alone tells you: Komatsu_PC600LC-6_Workshop_Manual_en-35328005433.pdf. That’s the official part number. Compare that with the third-party books that call themselves “compatible” – they often lift specs from a different model year, or they truncate the troubleshooting charts. Here, you get the full TROUBLESHOOTING section with N mode and E mode error codes: N-1 for monitor panel communication, E-5 for drop in engine oil pressure, E-6 for fuel control dial sensor abnormality. The electrical circuit diagrams are actual Komatsu drawings, not redrawn by someone who never saw a PC600LC-6 harness. If you need to check a connector pin number, the CONNECTION TABLE FOR CONNECTOR PIN NUMBERS is in there. No filler.

Does This Manual Include Wiring Diagrams?

Yes. Section 10 has an ACTUAL ELECTRIC WIRING DIAGRAM entry, and the troubleshooting section provides ELECTRICAL CIRCUIT DIAGRAM for the N mode and E mode systems. You get pinouts and harness layouts.

How Many Pages Are Dedicated to Engine Specs?

The engine-specific content is scattered across sections 01, 10, and 20. Section 01 has the SPECIFICATION DRAWINGS with engine dimensions and weight; section 20 includes the STANDARD VALUE TABLE FOR ENGINE covering compression pressure, blow-by pressure, oil pressure, valve clearance, injection timing – all factory calibrated. Tight calculations.

What Tools Do I Need for the Adjustments?

The manual lists a TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING section. You’ll need a digital pressure gauge for hydraulic circuits, a compression tester with the correct adapter for the SA6D140E-3, a dial indicator for valve timing, and a torque wrench that reads in foot-pounds – not Newton-meters if you’re in North America. The factory specifies IMPERIAL units throughout.

Can I Use This Manual for a PC600 (Non-LC) Model?

No. The manual specifically says PC600LC-6 with serial number 11064 and up. The PC600 (without LC) has different track frame and counterweight specs. Using this manual on a non-LC machine will give you wrong travel motor and final drive torque values. Do not swap.

Related Manuals

• Komatsu PC600-6 PC600LC-6 2003 Field Assembly Manual
• Komatsu PC600LC-6 Workshop Manual – 732 Pages of Factory Specs
• Komatsu PC600LC-6 2002 Service Manual – OEM Factory Shop Book

For additional reading on drivetrain fundamentals, see the Manual Transmission article on Wikipedia, and the Manual Transmission engineering resources.

Access the Factory Manual now and get the real Komatsu data on your screen – not a photocopy, not a reprint. You’ll have the exact same document the dealer techs use. No fluff, no reprints, no shortcuts.