Description

Komatsu PC200, PC200LC, PC210, PC220, PC240 1988 Workshop Manual

Let me tell you something about buying a used excavator manual off some random website: you get a PDF that says “tighten to spec” but never tells you the spec. Then you’re guessing on a main bearing cap and you either strip the threads or send a rod through the block. I’ve seen it. This Komatsu PC200, PC200LC, PC210, PC220, PC240 1988 Workshop Manual is the real factory print – 765 pages of what Komatsu wrote for their own techs. No aftermarket interpretation. If you’re cracking open a 3E-series engine or chasing a pressure drop in the swing circuit, this is the book you want on the bench.

Engine Testing and Adjusting: Why Factory Specs Matter

Section 12 of the manual – that’s “Testing and Adjusting” for the engine – is where most guys screw up. Komatsu gives you the compression pressure range, injector timing marks, and governor adjustments. Page 13-1 kicks off disassembly, but you need to hit the testing section first. I’ve watched a tech yank a cylinder head without checking valve clearance first. Cost him a bent pushrod and two days. That section tells you exactly how to measure and set clearances. The manual doesn’t assume you know; it shows you the sequence.

Section 13 covers disassembly and assembly with torque sequences for the cylinder head and main bearing cap. If you skip the tightening order on the head, you’ll warp it. Trust me, I’ve torqued more head bolts than most people have had hot meals. This is the real procedure.

What Torque Values Are Listed in This Komatsu Manual?

Every major fastener in the engine, power train, and hydraulic system has a torque spec. The manual lists them in N·m, but I convert to ft-lb on the fly. For example, the swing motor mounting bolts – you’ll find that in the hydraulics section’s maintenance standard (64-1). There is no “good enough.” There’s only the number Komatsu stamped in the book. Page 62 shows you the test procedures for the main relief valve, including the pressure setting and the adjustment screw locknut torque. You don’t guess on that; the machine relies on it.

Hydraulic System Coverage: Structure, Function, and Maintenance

Sections 61 through 64 – that’s structure and function, testing and adjusting, disassembly and assembly, and maintenance standard for the whole hydraulic system. If you’re replacing a boom cylinder seal on a PC220, you need the disassembly sequence from 63-1. The manual walks you through removing the piston, replacing the wear ring, and reassembling with the correct preload. I’ve seen guys blow a seal because they used the wrong size O-ring. The factory manual lists the part numbers and cross-sections. You can’t get that from a generic diagram.

7 Systems Covered in This 765-Page Workshop Manual

This is not a single-system book. It covers: General information (01), Engine (10), Power Train (20), Undercarriage (30), Hydraulic System (60), Electric and Electronic System (80), and Others (90). Each major section has sub-sections for structure/function, testing, disassembly, and maintenance standards. That’s 7 distinct systems with factory data. The power train section alone – 21-1 through 24-1 – gives you the torque converter, transmission, final drive, and steering clutches. If you work on track-type equipment, you need the undercarriage section (31-1) for track tension adjustment and sprocket removal.

Source Authenticity: OEM vs. Aftermarket Documentation

Let’s talk about why you want this manual and not a third-party reprint. Aftermarket manuals often omit the revision notes. This Komatsu manual includes a “List of Revised Pages” starting on page 00-2-1 that marks every update by revision number and date. If you’re working on a PC200-3 with serial number above 21464, you need the revised pages. Aftermarket sheets usually ignore those updates. The manual also includes a page noting corrections to the applicability of pages 11-1 and following – something a photocopy would lose. Paying a little more for the OEM file saves you a blown engine.

Related manuals you might need: Komatsu PC200 PC200LC Workshop Manual (if you need a separate model-specific one), KOMATSU PC200 PC210 Hydraulic Excavator Parts Catalog for part numbers, and Komatsu PC200 PC220-7 Service Manual for newer series. For general theory on Manual Transmission and Manual Transmission, check external resources – but this manual has the actual OEM testing procedures.

Does this manual cover the PC200LC and PC240 versions?

Yes. The title includes PC200, PC200LC, PC210, PC220, PC240. The front page lists PC200,200LC-3, PC210,210LC-3K, PC220,220LC-3, PC240,240LC,240NLC-3, and PC240,240LC,240NLC-3K. All variants are covered in the same 765-page document.

What torque specs are provided for the cylinder head?

Torque values are in the engine disassembly section. The manual lists the tightening sequence and final torque in N·m. You’ll need to convert to ft-lb if your wrench reads that way. Page 13-1 shows the procedure.

Is this manual complete or missing pages?

It’s the complete factory PDF with all 765 pages. The list of revised pages (00-2-1 onward) shows every update. No missing sections from the original printed book.

Can I use this manual for a PC200-3 with serial number 20001?

Yes. The manual covers PC200-3 from serial number 20001 and up. Also includes PC210-3, PC220-3, PC240-3 with their respective starting serial numbers. Check the front page for exact ranges.

If you’re rebuilding a Komatsu excavator from the late 80s, you already know the aftermarket books are a gamble. This is the factory book. 765 pages of what the engineers wrote. Access the Factory Manual and have the real specs on your laptop or tablet while you work. No more guessing on relief pressures or bearing clearances.