Description

Komatsu PC1100-6, PC1100SP-6, PC1100LC-6 2002 Workshop Manual

I’m Mike Callahan. Twenty-eight years turning wrenches, and I’ve seen more aftermarket manuals that read like someone’s cousin guessed the torque values. This 839-page OEM Komatsu PC1100-6, PC1100SP-6, PC1100LC-6 2002 Workshop Manual is the real deal – the same binder that sits on a dealer tech’s bench. If you’re holding a machine that weighs north of 100 tons, you don’t wing the valve clearance or the hydraulic pressures. You pull the factory spec.

Pop the hood on a PC1100-6 and you’re dealing with an SAA6D170-2 engine plus a three-pump hydraulic setup. This manual breaks it down into six sections: General, Structure and Function, Testing and Adjusting, Disassembly and Assembly, Maintenance Standard, and Others. The Testing and Adjusting chapter alone runs from page 20-1 onward and includes standard value tables for engine, chassis, and electrical parts. Need the fuel injection timing procedure? It’s in there. Valve adjustment? Page 20 covers Adjusting Valve Clearance with the exact sequence. No guesswork.

Fuel, Coolant, and Lubricants – What the Manual Tells You

Section 01 has a dedicated subsection called FUEL, COOLANT AND LUBRICANTS. That’s where you’ll find the approved fluids and capacities for the PC1100-6, PC1100SP-6, and PC1100LC-6 models. This matters because using the wrong hydraulic oil in these machines eats seals fast. The manual lists the flash point, viscosity grade, and API service class straight from Komatsu’s engineering. I’ve had guys use off-brand coolant and destroy an aftercooler. The spec is in Section 01 – use it.

Valve Clearance Adjustment – Why OEM Specs Matter

Section 20 lists a procedure called Adjusting Valve Clearance. Most aftermarket manuals say something like “adjust to spec” – they don’t tell you the engine must be cold, the firing order sequence, or the exact feeler gauge thickness in thousandths of an inch. This manual does. It also shows the rocker arm arrangement and the valve train layout from the Structure and Function chapter (Section 10). When you’re torquing head bolts on a 170-series diesel, a 10 ft-lb error can pull threads. Don’t risk it.

3 Reasons You Want OEM Documentation Over Chilton-Style Reprints

First, the wiring diagrams. The Electrical Circuit Diagram in Section 10 shows every pin, every connector location, and the wire color codes for the PC1100-6’s machine control system. Second, the torque tables. Every fastener from the swing circle to the PTO lubrication system has a value in ft-lb with a tolerance. Third, the troubleshooting flowcharts. The manual has a full Troubleshooting of Engine Controller & APS Controller System (E Mode) with judgment tables and connector pin numbers. KOMATSU PC1100-6 Field Assembly Instruction gives you the assembly order, but this workshop manual gives you the why and the how much torque.

Does This Manual Cover the Hydraulic System?

Yes, and it’s thorough. Section 10 includes the hydraulic circuit diagram, pump breakdown (No.1, No.2, No.3 pumps), control valves (L.H.5-spool, R.H.4-spool, swing 4-spool), travel motor, swing motor, and the straight-travel valve. The testing section (20) tells you how to measure piston pump control pressure and servo piston stroke. If you’re chasing a drift issue, there’s a specific test: Testing Locations Causing Hydraulic Drift of Work Equipment. It’s not a generic “check for leaks” – it tells you which spool valve to suspect first.

Source Authenticity – Why This Isn’t a Third-Party Knockoff

This file is a direct scan of the original Komatsu publication SEBM014207, printed in Japan in 2002. The OCR excerpt shows the revision marks and page numbering that factory manuals use. Compare that to a $9.95 access from some site that re-typeset the text and lost the torque values. I’ve seen reprints where the torque table for the hydraulic pump mounting bolts was off by 15 ft-lb. That’s a blown gasket and a downtime bill. This manual carries Komatsu’s copyright and part number. It’s the same document a dealer uses. Need proof? Check the Komatsu PC1100-6 PC1100SP-6 PC1100LC-6 2002 Workshop Manual 885 Pages listing – same structure, same page range. The 839-page count matches the binder exactly.

Audience Fit – Who Should Buy This Manual

If you own a PC1100-6, PC1100SP-6, or PC1100LC-6 excavator and you do your own repairs, this is non-negotiable. DIY mechanics who work on heavy equipment need the factory procedure for bleeding air from the hydraulic circuit, releasing remaining pressure, and testing the solenoid valve output. Shop owners – hand this to your lead technician instead of letting them guess. The manual includes a Standard Value Table for Electrical Parts that lists resistance and voltage values for sensors. Without that, you’re throwing parts at an E-1 code. Komatsu PC1100-6 Workshop Manual 1998 | 753 Pages OEM covers earlier builds, but the 2002 edition includes updates to the fuel system and the Manual Transmission? Actually, this machine uses a power train with a torque converter, not a manual transmission, but the wiring section references the Manual Transmission control logic for the PTO – just a note to read the diagram carefully.

How is the manual delivered – digital access or printed?

Digital access. You get a searchable PDF that opens on any device. No shipping, no waiting. The file is split into bookmarked chapters so you can jump from “Measuring Blow-by Pressure” to “Bleeding Air” in two clicks.

Does the manual include part numbers for ordering replacements?

No. This is a workshop manual – it covers service procedures, tolerances, and adjustments. For parts lookup you need the Komatsu parts catalog. However, the manual does reference the standard value tables for wearing parts like sprocket wear measurement and swing circle bearing clearance. That helps you decide whether a component is serviceable or needs replacement.

Bottom line: you’re not going to find a more reliable source for the PC1100-6 series. I’ve used this manual to rebuild a final drive, set the PPC valve output pressure, and fix a communication abnormality in the N mode system. Every time the machine started and ran without leaks. That’s what OEM documentation gets you. Access the Factory Manual and stop relying on internet forum torque specs.