Description

Komatsu PC350LC-8, PC350HD-8 2011 Workshop Manual

Komatsu PC350LC-8, PC350HD-8 2011 Workshop Manual – you want factory data, not someone’s guess at thread pitch. I’ve seen guys rebuild a final drive with aftermarket specs and wonder why the planetary gears howl. This thing is 1097 pages of Komatsu’s own documentation. Right off the press from August 2011. It covers serial numbers PC350LC-8 A10001 and PC350HD-8 A00001 and up. No reprints. No third-party copy. Just the original OEM shop manual.

If you are working on a Komatsu PC350LC-8 or PC350HD-8, you need the exact torque values for O-ring boss fittings, split flange bolts, and hose nuts. The STANDARD TIGHTENING TORQUE section lays out ft-lb values for every fastener. Miss one and you are chasing hydraulic leaks. The manual also includes electric wire codes by thickness and color – essential when you are tracing a short in the LS-EPC valve harness.

Standard Torque Tables and Why Aftermarket Ones Are Wrong

Aftermarket manuals love to give you one generic torque for all M10 bolts. That is garbage. Komatsu lists separate tables for bolts, nuts, hose nuts, split flange bolts, flared nuts, O-ring boss pipe joints, O-ring boss plugs, and both taper seal and face seal hoses. You want the proper ft-lb for a flared nut on the boom cylinder line? Look in the table on that page (inside the Torque section). I have had junior techs snap a split flange bolt using a generic chart. OEM data is the only way to keep threads intact.

Hydraulic System: The CLSS Section You Need

The CLSS (Closed Center Load Sensing System) section alone is worth the price. It covers the hydraulic circuit diagram, unloader valve, pressure compensation valves, boom regeneration circuit, arm regeneration circuit, merge-divider valve, LS select valve, self pressure reducing valve, travel junction valve, drift prevention valves, and the main relief valve. Every valve function is described with the correct pressure settings. If you are troubleshooting a sluggish swing, you need the swing motor and reverse prevention valve specs. This manual gives you the factory test pressures for the HMV160ADT-2 on the LC and the KMV200ADT-2 on the HD.

Does This Manual Cover the Engine and Power Train?

Yes. The ENGINE AND COOLING SYSTEM section includes engine related parts, radiator, oil cooler, and aftercooler. The POWER TRAIN chapter covers final drives for both PC350LC-8 and PC350HD-8, sprockets, swing machinery, and swing circle. Undercarriage specs for track frame, recoil spring, idler, carrier roller, track roller, track shoe, and triple grouser shoe are listed per model. You get dimension drawings and working ranges in the GENERAL section (page 01-1). The WEIGHT TABLE tells you exactly what you are lifting – critical before you pick up the boom assembly.

8 Sections That Cover Your Job From Diagnosis to Assembly

This manual is split into eight major groups: 01 GENERAL, 10 STRUCTURE FUNCTION AND MAINTENANCE STANDARD, 20 STANDARD VALUE TABLES, 30 TESTING AND ADJUSTING, 40 TROUBLESHOOTING, 50 DISASSEMBLY AND ASSEMBLY, 60 AIR CONDITIONER, and 90 DIAGRAMS AND DRAWINGS. The TESTING AND ADJUSTING section (30-1) walks you through pump flow tests, valve pressure checks, and sensor calibration. The TROUBLESHOOTING section (40-1) uses a symptom-based matrix – plug in the issue and follow the decision tree. No guessing. For a rebuild, the 50 DISASSEMBLY AND ASSEMBLY chapter gives you the order of operations for every major component, including the hydraulic cylinders (boom, arm, bucket).

Torque Specs and Fluid Capacities: Where to Find Them

Fluid capacities are listed in the FUEL, COOLANT, AND LUBRICANTS table inside the GENERAL chapter. It tells you how many quarts of oil for the final drive, how much hydraulic fluid, and the correct viscosity for San Antonio heat. The CONVERSION TABLES at the front let you convert metric to imperial if you are using older tools. But all torque values in the manual are given in both N·m and ft-lb – no conversion needed. I will say it again: use the factory table, not a generic chart.

Source Validity: Why This OEM Manual Beats Any Aftermarket PDF

This is a direct scan of the Komatsu America Corp. publication, copyright 2011. It carries the CEBM007501 part number. The foreword includes a revision page list – so you know exactly which pages have been updated. Aftermarket PDF sellers often reprint from a bad scan and miss half the diagrams. With this, you get the full hydraulic equipment layout drawing, the valve function schematics, and the electrical system diagrams without pixelation. If you need a separate reference for your truck, check the Komatsu PC350LC-8 Shop Manual or the Komatsu PC350LC-8, PC300LC-8, PC300-8, PC350-8 Workshop Manual – 989 Pages for other models. For wheel loaders, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual covers a different family. And if you are working on a car, do not confuse this with generic Manual Transmission guides – that is not what this is. Stick to model-specific OEM docs every time.

FAQ – Common Questions About This Manual

Is this manual specific to the PC350LC-8 and PC350HD-8, or does it cover other models too?

Yes, it is specifically for the PC350LC-8 and PC350HD-8 hydraulic excavators with serial numbers starting at A10001 and A00001. It does not cover the PC300 or other variants – those need their own factory manual.

What is the largest section in this manual?

The HYDRAULIC SYSTEM subsection inside Structure, Function and Maintenance Standard is massive – it covers the dual pump HPV125+125, all valve functions, and the entire CLSS circuit. Probably 200+ pages.

Does it include wiring diagrams?

Yes. Section 90 DIAGRAMS AND DRAWINGS has the full electrical schematics for the engine control, sensors, and electronic control system. The ELECTRIC WIRE CODE table helps decode wire colors.

Can I use this manual for the PC350HD-8 if I have an LC model?

Yes. Both models are covered in the same book. Differences like the travel motor (HMV160ADT-2 vs KMV200ADT-2) are labeled separately. Just pay attention to the model-specific headings.

You need to work on this excavator without stopping to hunt for wrong specs. Access the Factory Manual now and keep it on your tablet or printed on the bench. The time it saves you on one hydraulic repair will pay for itself. Stop relying on forum posts and aftermarket reprints. Get the genuine Komatsu documentation.