Description

Komatsu PC170LC-10 Workshop Manual – Factory Specs for Your Heavy Equipment

Look, you’re working on a Komatsu PC170LC-10 hydraulic excavator with serial number 30001 and up. If you’re trying to fix it without the OEM workshop manual, you’re gambling with expensive components — and your time. I’ve been in this trade 28 years. I know what happens when you guess a torque spec on a final drive or misread a fuel system diagram. You get leaks, you get failures, and you get a machine that’s down longer than it should be. This manual is the one Komatsu shipped to dealers. It’s not some aftermarket rewrite. It’s a Workshop Manual with 1450 pages of factory engineering. Every spec, every procedure came from the people who built the machine.

Engine and Cooling System: What the Manual Covers

The Engine and cooling system section under Structure and function (section 10) walks through the VFT, EGR system piping, EGR valve, EGR cooler, KCCV ventilator, KDOC muffler, and the cooling system itself. You get circuit diagrams for the EGR system and layout drawings for the KCCV. The testing and adjusting section (section 30) gives you procedures for engine speed, boost pressure, exhaust gas color, valve clearance, compression pressure, blowby pressure, oil pressure, fuel pressure, and fuel discharge/return/leakage. That’s the kind of coverage you need when a customer’s machine won’t start or runs rough.

Fuel System Procedures – Bleeding and Leak Testing

Fuel system work on a diesel excavator can turn into a headache fast if you skip steps. This manual includes a dedicated procedure for bleeding air from the fuel system, testing fuel circuit for leakage, fuel discharge and return checks. Page numbers aren’t everything, but the foreword section specifically covers handling equipment of fuel system devices. The standard torque table in section 00 (page 00-48) lists values for fuel line connections. You won’t find those in a generic repair guide. For related Komatsu fuel system procedures, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual”>WA65-5 WA70-5 WA80-5 2005 Workshop Manual covers similar diesel fuel systems for wheel loaders.

Electrical System Diagnostics with KOMTRAX

Electrical problems on a PC170LC-10 can lock you out of starting or throw false codes. The manual’s electrical system chapter includes the machine monitor system, KOMTRAX system, sensor locations, and the electrical control system. Testing and adjusting covers special functions of the machine monitor and KOMTRAX terminal start-up procedure. Handling of electrical equipment is explained in the foreword, including how to read electric wire codes. If you’re new to Komatsu electrical diagnostics, check the Manual Transmission”>Manual Transmission resource for understanding driveline controls, but the manual itself has everything for the excavator’s electronics.

How the Hydraulic System Testing Sections Save You Time

The hydraulic system occupies the biggest chunk of the manual. Section 10 covers component layout, valve control, CLSS, main pump, control valve, swing motor, travel motor, PPC valve, solenoid valve, accumulator. Section 30 lists procedures for releasing remaining pressure from hydraulic circuit, testing control circuit oil pressure, adjusting work equipment/swing/travel circuits, pump PC and LS control, solenoid valve outlet pressure, PPC valve outlet pressure, and isolating hydraulic drift. Following the OEM sequence keeps you from tearing apart components that aren’t faulty. The Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual”>WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual might be useful if you also work on backhoe-loaders, but this excavator manual has the hydraulic data you need.

Standard Torque Table – Why You Need Factory Values

Section 00 includes a standard tightening torque table. This is not a generic bolt torque chart from a hardware store. It’s the Komatsu-specified values for fasteners on this model. Using the wrong torque on a cylinder head or swing motor mount can shear bolts or cause leaks. The conversion table is also provided so you can work in imperial or metric. Don’t guess. Use the factory table. For more on drivetrain torque specs, the Komatsu PW95R-2 Workshop Manual – 520 Pages of Factory Specs”>PW95R-2 Workshop Manual – 520 Pages of Factory Specs covers another Komatsu model but same rigorous standards.

Testing and Adjusting – Real Procedures for Real Machines

Section 30 alone has over forty specific procedures. Tools needed are listed, including sketches of special tools. Procedures for testing travel deviation, adjusting swing circle bearing clearance, checking cab tipping stopper, and adjusting mirrors. Each step comes from the factory floor. If you’re working on a manual transmission, the Manual Transmission”>Manual Transmission page has general theory, but for the PC170LC-10 final drive and swing machinery, this workshop manual is the only source you should trust.

Who needs this manual? Any shop or owner that maintains a PC170LC-10. Beginners get step-by-step sequence with safety warnings. Pros get the exact specs they need without wasted time.

One sentence summary: OEM data beats aftermarket every time. Access the Factory Manual.

Source Validity – Factory OEM vs Aftermarket

This is the real Komatsu shop manual, not a third-party reprint. The PDF is a direct scan of the original dealer publication. You get the same content Komatsu technicians use. Aftermarket manuals often compress information or omit critical notes. Here, the table of contents lists every subsystem: engine, power train, undercarriage, hydraulic, work equipment, cab, and electrical. Every page is from Komatsu.

Does the manual include wiring diagrams for the electrical system?

Yes, pages 00-31 to 00-39 cover handling of electrical equipment and how to read electric wire codes. The electrical system chapter in section 10 details the control system, machine monitor, KOMTRAX, and sensors. Testing and adjusting procedures in section 30 include special functions of the machine monitor and KOMTRAX terminal start-up. Actual wiring diagrams? The manual does include circuit diagrams for specific systems like the EGR system circuit diagram and hydraulic solenoid valve control. You’ll find the electrical schematics embedded in the testing sections. It’s not a separate wiring book, but the information is there for troubleshooting.

Can I use this manual for PC170LC-10 models before serial number 30001?

This edition covers serial numbers 30001 and up only.

If you’re tired of chasing specs from forum posts or outdated manuals, get the Komatsu PC170LC-10 workshop manual and work with factory data.