Description

Komatsu PC150-6K, PC150LC-6K 1997 Workshop Manual

I have turned wrenches on these excavators since the late 90s. The biggest mistake I see is someone buying a cheap aftermarket reprint and trusting it for head bolt torque or fuel timing. That gets expensive fast. If you own a PC150-6K or PC150LC-6K, this Komatsu PC150-6K, PC150LC-6K 1997 Workshop Manual is what the dealer techs used when these machines were still under warranty. 617 pages of factory procedure, no condensed garbage. Everything from the fuel system to the valve clearances is in here with the exact numbers Komatsu stamped on the line.

That manual in your PDF reader is the same one I keep on my tablet in the shop. When a customer brings in a PC150 that won’t idle right or a PC150LC with a hydraulic drift, I pull up page 20-XX and start with the judgment table. Not guesswork. Factory test specs.

Engine and Fuel System: What the Manual Covers

Section 01 – GENERAL gives you the factory fill specs for fuel, coolant, and lubricants. Don’t guess the hydraulic oil grade. Section 10 – STRUCTURE AND FUNCTION breaks down the engine related parts, the radiator and oil cooler, and the full power train. I’ve seen guys swap a fuel injection pump and never check the timing because some third-party manual left it out. This book includes the fuel control dial adjustment procedure and the governor motor lever stroke test. If you are fighting a low-power complaint, the troubleshooting charts in Section 20 walk through E-10 (lack of output) with the exact electrical tests for the fuel control system.

Valve Adjustments and Hydraulic Pressure Testing

The valve clearance specs are buried in the maintenance standard section (40), but you also get the PPC valve output pressure measurements and the TVC valve servo piston input pressure test in Section 20. Need to know the LS differential? The manual has a table of judgment standard values and the procedure for testing and adjusting LS valve output pressure. I have used that exact table to sort out a sluggish swing on a PC150LC-6K that three other shops misdiagnosed. The hydraulic circuit diagram alone is worth the price – it shows the CLSS, the center swivel joint, and every control valve port.

Electrical Troubleshooting: Service Codes and Wiring Diagrams

This is where aftermarket copies fall apart. The factory manual includes the full electrical wiring diagram for the machine monitor system, the engine control system, and the electronic control system. The troubleshooting section has a service code table covering E218 (communication abnormality) through E317/E318 (motor drive system faults). It also explains the action the controller takes when an abnormality occurs – that is critical for avoiding a failed component during diagnosis. I have used the connector pin connection table to track down a no-start condition that turned out to be a bad battery relay circuit. If you are working on the electrical system, you need the factory schematic, not a redrawn version.

617 Pages of Factory Specs and Procedures

The manual is divided into six main sections: 01 General, 10 Structure and Function, 20 Testing and Adjusting, 30 Disassembly and Assembly, 40 Maintenance Standard. Each one is packed with dimensional drawings, torque tables, and cross-section views. The weight table alone tells you the exact machine weight for transport. The fuel and coolant specs are in Section 01. The standard value table for electrical parts in Section 20 lists every sensor and actuator resistance. You do not get that from a third-party reprint – they often skip the tables because the OCR messes up the numbers. This is a clean OEM scan from the original 1997 print.

OEM vs Aftermarket: Why Original Matters

I have had techs show me aftermarket manuals that say “refer to factory data” for half the procedures. That is useless. This copy gives you the actual pages – the same ones Komatsu issued in November 1997. The disassembly section (30) shows you the order to pull the final drive, the swing circle, and the track frame. No paraphrased steps. If you have ever tried to replace a boom holding valve without the correct bleed procedure, you know why the original text matters. The PPC accumulator release procedure is spelled out step by step. Safety lock valve testing is in there. Buy the factory manual once and stop buying bad copies.

For those working on similar models, check the Komatsu PC150-6K PC150LC-6K 2001 Service Manual for later serial numbers. Other related manuals include the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual and the Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual. And if you need broader theory on gear trains, see Manual Transmission and Manual Transmission for background knowledge on power flow.

Does this manual include specifications for the Komatsu PC150-6K and PC150LC-6K?

Yes. The manual covers both models with serial numbers K30001 and up. Section 01 has the full specifications including engine horsepower, operating weight, and dimensions.

Are the wiring diagrams included clear enough for a beginner?

The electrical wiring diagram is a full fold-out style schematic in the PDF. Each connector is labeled with pin numbers. The troubleshooting section explains how to read the diagrams and use the judgment tables. If you have basic multimeter skills, you can follow it. I have walked green techs through E-8 (engine does not start) using these diagrams.

What torque specs are listed?

Every fastener torque is listed in the disassembly and assembly section (30) and the maintenance standard section (40). Head bolts, final drive nuts, swing circle bolts – all with Nm values. No missing values. If it says “tighten to specification”, the spec is right there.

Can I print the PDF to use in the shop?

Yes. The PDF is high resolution and searchable. Print the pages you need or keep it on a tablet. I keep mine on a ruggedized case and flip to the hydraulic circuit diagram when I am under the cab. No second guessing.

This manual is the same one Komatsu issued to their distributors. It is not a reprint, not a condensed version, and not a third-party compilation. You get the genuine 1997 factory document. Access the Factory Manual and put the right specs on your next repair.