Description

Komatsu PC240LC-10 2013 Workshop Manual

I’ve seen too many guys throw a torque wrench on a swing motor bolt using a generic spec from a forum. That’s how you snap a fastener or blow a seal. The Komatsu PC240LC-10 2013 Workshop Manual stops that guessing cold. This is the same binder that sits in a dealer service bay – 1835 pages of factory data for the PC240LC-10 excavator with the 6D107E-2 engine. Serial numbers A20001 and up. If you’re working on one of these machines, you need the OEM print, not some aftermarket rehash that skips half the tightening torque tables.

Open the foreword and you get straight to the point: hoisting instructions, wire rope selection, and how to handle electric and hydraulic components without damaging them. Page 40-1 kicks off the troubleshooting section – that’s where you go when the machine acts up. The manual doesn’t dance around symptoms; it gives you the test steps and acceptable readings in imperial units. Pump pressure low? The CLSS hydraulic chapter breaks down the LS valve, PC valve, and the EPC solenoid so you can isolate the fault without swapping parts blind.

1835 Pages of Factory Data – Why Page Count Matters

Aftermarket manuals cut corners. They condense a full hydraulic circuit diagram into a paragraph. Not this. The Komatsu PC240LC-10 Workshop Manual dedicates entire sections to the CLSS system, the main control valve, and the swing motor holding brake. Each valve function – unload, pressure compensation, boom regeneration, arm drift prevention – gets its own explanation with cross-section illustrations. When you’re inside the valve stack, you need to know which shuttle valve feeds the LS signal. That’s on page 10-? It’s in section 10, structure and function. You won’t find that level of detail in a third-party PDF.

Standard Tightening Torque Tables and Fluid Capacities

Torque specs for the 102, 107, and 114 engine series are listed with separate columns for bolts, nuts, hose nuts, split flange bolts, O-ring boss fittings, and taper seal joints. The manual gives values in ft-lbs – not Newton-meters converted by a calculator that rounds up. Face seal joints? Table of tightening torques for flared nuts? All there in the foreword. Lubrication chart in section 01 shows the exact fluid types and capacities for the fuel, coolant, and hydraulic system. If you overfill the tank because a generic manual said 20 gallons and the OEM spec is 18, you get aeration and pump cavitation. That’s a $4,000 mistake you avoid with this manual.

What Is Covered in the Testing and Adjusting Section?

Section 30 (starting page 30-1) covers all the tests you need: hydraulic pressure checks, swing brake release pressure, travel motor drift, and engine speed sensor calibration. Each test lists the required tools – you’ll see stuff like a tachometer, pressure gauge set, and a digital multimeter with specific accuracy. No fluff, no “use whatever gauge you have.” It tells you the port locations and the correct adapter for the test fitting. Follow that procedure, and you get real data, not a guess.

Follow the Hoisting Instructions – Don’t Skip Safety

The manual starts with hoisting instructions for a reason. A PC240LC-10 weighs over 50,000 lbs. If you lift it with the wrong sling angle or a worn wire rope, you’re looking at a drop. The table for selecting wire ropes by breaking strength is in the foreword. Also includes precautions for sling work, mobile crane use, and overhead hoist cranes. I tell every apprentice: read the safety notice before you turn a wrench. The manual has a full safety notice section – important safety notice, general precautions, preparations for work, precautions during work. Treat it like a pre-shift checklist.

CLSS Hydraulic System: What the Manual Reveals

The CLSS (Closed-center Load Sensing System) is the heart of the machine’s hydraulic control. Section 10 explains the basic principle, the structure of the LS valve, the PC valve, and the LS-EPC valve. It shows the hydraulic circuit diagram with all valve names. If you’ve ever had a boom that drifts down or an arm that moves slow, the boom hydraulic drift prevention valve and the arm quick return valve are in that chapter. The troubleshooting section uses that info to guide you to the right component. No guesswork – you go from symptom to schematic to test point.

Need a related manual for another Komatsu machine? Check the Komatsu PC240LC-10 Workshop Manual – 1615 Pages of OEM Specs – though note the page count of this actual manual is 1835 pages, not 1615. Also available: Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual and Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual. For fundamentals on manual transmission systems, see Manual Transmission and Manual Transmission on Wikipedia.

Does this manual cover the air conditioner system?

Yes. Section 80 is dedicated to the air conditioner, including compressor, condenser, and refrigerant line service.

How do I verify the revision level of my manual?

The foreword includes a table of marks and page revision indicators. Affected pages show a dot symbol – ● for replaced, ○ for new, and ( ) for deleted. Check the revision mark column next to each page number. If your manual is from June 2013, it’s the original release. Komatsu recommends contacting your distributor for the latest revision, but the 1835-page edition covers all serial numbers A20001 and up. The CD-ROM file name is CEBM024902_PC240LC-10. For warranty or repair history, cross-reference the page revision marks against the machine’s serial number. That’s the only way to know if a technical bulletin supersedes a procedure.

Don’t trust your machine to a photocopy or a forum screenshot. The OEM data is the only way to hit the right torque, clear the right code, and keep the track frame safe. Access the Factory Manual now – it’s the same 1835-page file Komatsu dealers use.