Komatsu PC350LC-8, PC350LCD-8, PC350NLC-8, PC350NLCD-8 Workshop Manual – 1038 Pages of Factory Specs

You’ve got a PC350LC-8 on the pad, and the customer wants it back tomorrow. The swing motor is lagging, the hydraulics are noisy, or maybe the DPF light is on. You could waste a morning flipping through aftermarket garbage that gives you generic bolt torques and wiring diagrams that don’t match the harness you’re staring at. Or you could pull up the real thing – the 1038-page Komatsu PC350LC-8, PC350LCD-8, PC350NLC-8, PC350NLCD-8 Workshop Manual – and get the factory spec the first time. I’ve been turning wrenches for 28 years. I know the difference between a manual that saves your ass and one that costs you a comeback.

1038 Pages of Factory-Direct Procedures

This isn’t a condensed version or a third-party rewrite. Komatsu Engineering wrote this book. It covers every system on the PC350LC-8, PC350LCD-8, PC350NLC-8, and PC350NLCD-8 starting from serial numbers K50001 and up. The table of contents alone runs twelve sections, each with its own Form Number. You get the full structure – index and foreword, specification with dimension drawings and weight tables, then the meat: engine and cooling system, power train, undercarriage, hydraulic system split into three parts, work equipment, cab, electrical system, and even the auto grease system. The page count isn’t padding. Every page has a wire code, a clearance limit, or a torque value you’ll use.

What Torque Values Are Listed in the Manual?

The front section has a standard tightening torque table. That’s the table I beat into every junior tech who comes to my shop – use it or redo the job. But the manual goes deeper. In the Testing and Adjusting section (Part 1) you get procedures for measuring engine oil pressure, adjusting valve clearance, and checking track shoe tension. Page 73 (if you’re using the printed binder) holds the charge pressure specs for the hydraulic pump PC control circuit. Don’t guess. The manual tells you exactly what pressure to expect and which port to tap.

Engine and Cooling System: Know Your Komatsu

Section 10 – Structure, Function and Maintenance Standard breaks the engine down into related parts, then walks through radiator, oil cooler, and aftercooler. The Diesel Particulate Filter gets its own subsection: component parts, system description, and regeneration procedure. If you’ve ever had a Komatsu DPF that won’t regenerate and the aftertreatment system is throwing codes, this section explains the regeneration logic without the dealer markup. The electrical system section covers the engine control, monitor system, and all the sensors – including the KOMTRAX terminal. That alone is worth the price if you’re trying to troubleshoot a no-start.

Get the Hydraulic System Right – Part 1, 2, and 3

The hydraulics on these machines are complex. The manual doesn’t treat them as one blob. Part 1 covers the equipment layout, tank and filter, and pump. Part 2 dives into the control valve, CLSS, merge-divider valve, attachment circuit selector valve, and the hydraulic drift prevention valve. Part 3 gives you the PPC valve, solenoid valve, travel motor, swing motor, and cylinder. Each component has an exploded view and a functional description. You need to rebuild a swing motor? The procedure is in there, with the shim adjustments and torque sequences for the gear housing. I’ve used these pages to rebuild three travel motors – zero comebacks.

Does This Manual Cover the Diesel Particulate Filter?

Yes. Section 10 includes a full sub-section on the DPF. It lists component parts, describes the system, and explains regeneration modes. If you’re chasing passive regeneration failures or active regeneration lockouts, this is where you’ll find the factory diagnostic tree. The manual also includes troubleshooting by failure code in Section 40 – that’s three parts of code-based diagnostics plus electrical troubleshooting. Pair this with the wiring diagrams in the electrical system chapter, and you can isolate a sensor fault in under an hour.

One note about source validity. This is an OEM document, not a aftermarket copy. The original file name is Komatsu_PC350LC-8-PC350LCD-8-PC350NLC-8-PC350NLCD-8_Workshop_Manual_en-35328004896.pdf. You’re getting the same manual a Komatsu dealer technician uses. Aftermarket manuals often omit the standard value tables in Section 20 – the specs for engine compression pressure, blow-by limits, and chassis clearance values. This manual has them. If you’re comparing this to something from a third-party publisher, stop. They didn’t get the Komatsu engineering data. We did.

Who is this for? If you own a PC350LC-8, PC350LCD-8, PC350NLC-8, or PC350NLCD-8 and you do your own maintenance, this manual will pay for itself the first time you avoid a dealer service call. Home garage enthusiasts who work on heavy equipment will appreciate the tool lists – the Testing and Adjusting section starts with a list of required tools, including special Komatsu service tools. If you’re a shop owner, put this on the shop tablet so your techs stop guessing and start torquing to spec. I’ve trained four techs using this manual. It works.

Looking for related manuals? Check the Komatsu PC350LC-8 PC350HD-8 2011 Workshop Manual for a slightly later variant, or the Komatsu PC350LC-8, PC300LC-8, PC300-8, PC350-8 Workshop Manual – 989 Pages if you need cross-model coverage. For smaller equipment, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual covers wheel loaders with similar hydraulic principles.

If you’re coming from the automotive world and need a primer on drivetrain fundamentals, the Manual Transmission article on Wikipedia explains basic gear reduction – helpful context for the final drive and sprocket sections. But for the Komatsu itself, this manual gives you the factory method for removing and installing the final drive assembly, including the shim adjustments and bearing preload. The Manual Transmission knowledge won’t hurt, but the workshop manual is what you need in your hand when the idler is wobbling.

Which serial numbers does this manual cover?

PC350LC-8 K50001 and up, PC350LCD-8 K50001 and up, PC350NLC-8 K50001 and up, PC350NLCD-8 K50001 and up.

How do I use the standard torque table?

The table is in the foreword section – it lists tightening torque for bolts by diameter and grade. But you also need the specific torque values listed in each component section, like the swing motor gear housing bolts or the track roller mounting bolts. The manual gives you both the generic table and application-specific torques. Never trust a generic chart alone; the manual’s procedure for each joint overrides the general table when the engineer specifies a different value. I’ve seen guys snap bolts because they used the table instead of the procedure. Use the section-by-section torque callouts.

Download the Factory Manual. Stop chasing aftermarket data that leaves you guessing. You’ll get the full 1038-page PDF, every diagram, every spec, every procedure that Komatsu wrote. No reprints, no condensed versions. Open it on your tablet or print the pages you need. Your Komatsu deserves the factory treatment.