Description

Komatsu PC180LC-3K, PC180LLC-3K, PC180NLC-3K Parts Catalog

You ever order a hydraulic line for a PC180LC-3K only to have the fitting be off by a quarter inch? That’s what happens when you rely on a generic aftermarket parts list. I’ve seen it cost a shop a full day of downtime and twice the shipping. This Komatsu PC180LC-3K, PC180LLC-3K, PC180NLC-3K Parts Catalog is the original factory book – 352 pages of exploded diagrams, OEM part numbers, and the exact ordering codes that keep your parts counter from guessing. No reprints, no scanned copies someone cleaned up in Photoshop. This is the real binding.

Page 1 lays out the serial number ranges for each variant – PC180LC-3K K10001 and up, PC180LLC-3K K10001 and up, PC180NLC-3K K10001 and up. If you don’t match your machine’s serial number to the right page group, you’re ordering blind. This catalog gives you the exact figure number and part number breakdown per assembly. That’s the difference between a part that drops in and one that needs a grinder.

Why the Serial Number Matters

Every Komatsu excavator gets updates during production. A 2012 PC180LC-3K might use a different final drive seal than a 2015 unit. The OEM catalog marks every change with the serial number cut-in. Page 3 of the foreword tells you to give the model No. and serial number plate location – usually on the engine hood or near the operator seat. I’ve watched techs skip this step and end up with a pump that needed a different yoke. Don’t be that guy.

3 Codes That Save You From Ordering the Wrong Part

This catalog uses a set of column abbreviations that most aftermarket copies strip out. “Qty” tells you how many per machine. “Ex-part” is the quantity per assembly – important when you’re rebuilding a track frame and need four bolts, not one. The Description Qty Codes include KIT (part is part of a service kit), OP (optional – not on standard machines), US (undersize), OS (oversize), and STD (standard). If you order a standard piston ring when your engine has been bored oversize, you’re pulling the head again. These codes are printed on every page.

Undersize and Oversize Parts: When to Use Them

Engines and hydraulic pumps wear. Komatsu offers undersize and oversize bearings, pistons, and seals. The catalog flags them with US and OS in the part number column. If you mic a journal and find it’s 0.010″ undersize, you need the matching US part. The catalog doesn’t assume you know – it lists both STD and OS/US options side by side. Page after page of that information saves you from having to measure twice and then call a dealer. If you’re rebuilding a swing motor on a PC180NLC-3K, this is the kind of detail that keeps the job on schedule.

How to Read the Parts Book: Foreword Instructions

Page 3 explains the substitution symbols – a part that can be replaced by another in the list vs. a part that is not supplied independently. That little arrow symbol tells you if you can order the complete assembly instead of a internal seal. The foreword also covers ordering procedures: give the part number, catalog name, quantity, model No., serial number, and destination. Following that sequence means your order lands in the right bin. I’ve had countermen tell me they could fill my order in two minutes because I gave them the 6-digit part code from this catalog. Try that with a generic PDF.

Does This Parts Catalog Cover All Three Models?

Yes – the same book covers the PC180LC-3K, PC180LLC-3K, and PC180NLC-3K. Each model gets its own figure numbers within the 352 pages. The LL variant is the long-track version, the NLC is a narrow-gauge machine. Undercarriage parts differ, and the catalog breaks them out separately. You don’t need to buy three books. One catalog, one set of exploded diagrams, all the part numbers. For the service side, grab the Komatsu PC180-3 Series Workshop Manual to get the removal and installation procedures. That pair covers you from diagnosis to parts ordering.

If you’re also working on older hydraulic systems, the FAI 67-80DT Hydraulic Steering Piston Parts List might be useful for reference. For another Komatsu machine, check the Komatsu WH609-1 WH613-1 Parts Catalog | 347 Pages OEM.

Diesel engine fundamentals are the same across most heavy equipment. To understand how your Komatsu engine works under load, read this Wikipedia article on diesel engines. For a deeper look at fuel injection timing, this Wikipedia article on diesel engines covers the basics.

FAQ

Can I use this parts catalog to order seals and gaskets for a PC180LLC-3K undercarriage?

Yes. The catalog lists every seal, bushing, and roller with OEM part numbers and quantity per machine. Look up the final drive section by figure number.

What if the part I need is listed as “OP” (optional)?

OP means the part was not included on standard machines. You’ll need to special-order it through your Komatsu dealer. The catalog gives you the exact part number so you can request it. No guesswork – just quote the number from the book.

My shop keeps this catalog on the workbench next to the laptop. If you’re ordering parts for any of these three Komatsu excavators, you need the OEM data – not some repackaged aftermarket list. Access the Factory Manual and start pulling the right parts your next rebuild.