Description

Komatsu PC290LC-10 2013 Workshop Manual

I’ve seen too many jobs go sideways because a tech relied on a third-party manual and guessed a torque spec. You loosen a head bolt on a 6D107E-2 engine with the wrong sequence, and you’re pulling the cylinder head again. That’s billable hours you don’t get back. This Komatsu PC290LC-10 2013 Workshop Manual is the factory print – 1845 pages, July 2013, straight from Komatsu America Corp. If you’re working on serial numbers A25001 and up, this is the only document you need.

Standard Tightening Torque: Where the Manual Earns Its Keep

Every nut, bolt, flange, and O-ring boss in this book has a factory-specified torque value. The section on “Standard Tightening Torque” covers bolts and nuts, hose nuts, split flange bolts, flared nuts, O-ring boss piping joints, and plugs. If you’ve ever had a hydraulic connection weep because you guessed the ft-lbs on a taper seal joint, you know why this matters. For the 102, 107, and 114 engine series, there are separate tables for bolts, eye joints, and taper screws. Don’t rely on a generic chart from a web forum – use the exact values Komatsu tested. Page 73 lists the tightening torques for split flanged bolts you’ll need when reinstalling the main pump lines.

Engine and Cooling System: Structure and Function

The “Structure and Function” section (chapter 10) breaks down the engine related parts, radiator, oil cooler, after cooler, and fuel cooler. It’s not a schematic dump – it explains how the cooling circuit works and what the pressure differentials should be. If you’re diagnosing an overheating machine, you need to understand the flow paths. The manual also covers the “Coating Materials” appendix, which tells you which sealants to apply on which gasket surfaces. Wrong sealant on the oil cooler lines leads to leaks. Period.

7 Major Sections: What You Get

The TOC is laid out in numbered chapters: 01 General (specs, dimensions, lubrication chart), 10 Structure and Function, 20 Standard Value Tables, 30 Testing and Adjusting, 40 Troubleshooting, 50 Disassembly and Assembly, 60 Maintenance Standard, 80 Air Conditioning, and 90 Diagrams and Schematics. That’s nine sections, but the heavy lifting is in the middle five. The “Testing and Adjusting” chapter (30) gives you the pump flow test procedures and pressure compensation valve settings. If you’ve ever fought a LS valve that won’t stroke, you’ll appreciate the step-by-step in that chapter.

Does This Manual Cover the CLSS Hydraulic System?

Yes, and with more detail than you’ll find in any aftermarket PDF. The manual dedicates a full subsection to the CLSS (Closed-Loop Load Sensing System) – structure, basic principle, main pump operation, LS valve, PC valve, LS(PC)-EPC valve. It even covers the boom regeneration circuit and the arm hydraulic drift prevention valve. If you’re troubleshooting a slow boom or a machine that drifts down overnight, you need the factory hydraulic diagram and the shuttle valve locations. The “Diagrams and Schematics” chapter (90) has the full circuit maps with wire codes and color codes. That alone saves you hours of tracing lines with a multimeter.

Who Needs This Manual on Their Bench?

Anyone working on a PC290LC-10 – whether you’re a shop owner with a fleet of Komatsu excavators or a DIY operator who wants to avoid dealer labor rates. The manual assumes you have basic tools (wrenches, torque wrench, hydraulic gauges) but it doesn’t hand-hold. It lists required tools in each procedure. For example, when disconnecting the travel motor, you’ll need a sling and a crane – the “Hoisting Instructions” section covers wire rope selection and crane precautions. Safety warnings are bold and placed before each procedure. I’ve seen burned techs skip the lock-out tag-out for the swing holding brake. This manual reminds you every time.

You also get the “Electric Wire Code” tables – classification by thickness, color, and code. When you’re chasing a short in the travel PPC shuttle valve circuit, you’ll reference the wire code to confirm continuity. The manual doesn’t obsolete electrical diagnostics; it gives you the OEM wiring diagrams with component locations. That’s the difference between a quick fix and a rewire that burns the harness.

Frequently Asked Questions

Does this manual include the 6D107E-2 engine specs?

Yes. The engine is specified on the cover page, and the Structure and Function chapter covers the engine related parts and cooling system. Standard torque tables include separate values for the 102, 107, and 114 engine series – the 6D107E-2 is in the 107 series.

Can I use this for a PC290LC-10 with serial number below A25001?

Komatsu produced this manual for A25001 and up. Earlier serial numbers may have different hydraulic control valve configurations or engine revisions. You risk mismatched torque values and wiring pinouts.

Aftermarket manuals skip the “Precautions for Operations” section. This one doesn’t. It spells out when to use counterbalance valves and how to safely depressurize the hydraulic tank before removal. Missing that step can spray 300°F oil across your bay. I don’t care how many years you’ve been turning wrenches – you need the factory procedure. Komatsu PC290LC-10, PC290NLC-10 Technical Manual | OEM Specs is the companion service manual for deeper component rebuilds. If you also work on loaders, check 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 wheeled machines. For general transmission theory, see Manual Transmission and Manual Transmission on Wikipedia – but only after you’ve got the Komatsu wiring diagrams open.

Get the factory data. Stop wasting time with aftermarket PDFs that skip the LS by-pass plug procedure. Access the Factory Manual and keep it on your tablet next to the torque wrench.