Description

Komatsu 95-2 2002 Workshop Manual – Factory Specs for the 4D95LC-2 Engine

If you’ve got a Komatsu 95-2 2002 Workshop Manual-era engine on the stand and you’re flipping through a generic repair book, you’re asking for a comeback. I’ve seen guys torque head bolts to spec from some third-party PDF and wonder why the oil pan leaks. This isn’t that. This is the real factory book – 180 pages of what Komatsu wanted you to know. No aftermarket reprints, no faded copies. Every page matches the original printed shop manual from 2002.

Section 01 starts with general specs – weight table, overall drawing, engine performance curve. That tells you what you’re working with before you touch a wrench. If you need the exact fuel injection pump calibration data, it’s in section 12. The troubleshooting charts run from S-1 (poor starting) through S-16 (excessive vibration). I’ve used those charts on more than one job where the junior tech swore the pump was bad – turned out to be a blocked fuel filter. The manual walks you through it step by step, not with some vague “check fuel system” nonsense.

What’s Inside This 180-Page Workshop Manual

The table of contents is laid out like a real shop manual: Foreword with safety, hoisting instructions, coating materials, and – this is critical – a standard tightening torque table. Section 11 covers structure and function – intake/exhaust, engine body (cylinder head, block, timing gear, valve system), lubrication, fuel system, cooling, electrical. Section 12 is testing and adjusting: valve clearance, compression pressure, fuel injection pressure, injection timing, fuel cut solenoid. Then there’s the troubleshooting section with 16 symptom categories. Section 13 is the big one – disassembly and assembly, 26 steps for the 4D95LC-2. Each step lists special tools. You won’t have to guess what to remove next.

Torque Specs and the Standard Tightening Torque Table

Torque is not optional. This manual gives you the factory standard tightening torque in the foreword (look for page 00-8 in your PDF). Then, in the disassembly section, you get specific torque values for cylinder head bolts, main caps, flywheel, and more. If you’re working on the cylinder head, the manual tells you the sequence and the angle. Skip the torque step and you are buying a new head gasket. Period. The manual also includes a conversion table at the front, so if your torque wrench reads in lb-ft, you can convert from Nm without a separate calculator.

Does This Manual Cover the 4D95LC-2 Engine?

Yes – this is the 95-2 series, which includes the 4D95LC-2. Section 13 specifically lists overall disassembly of the 4D95LC-2. You get the full breakdown: alternator, fan pulley, starting motor, injection nozzle, fuel injection pump, cylinder head, pistons, crankshaft, the works. The assembly section follows the reverse order with valve clearance adjustment right after installing the cylinder head. If you’re rebuilding a 4D95LC-2, this is the only book you need.

Testing and Adjusting: Valve Clearance and Injection Timing

Section 12 is where you spend most of your time. It starts with adjusting valve clearance – cold engine, feeler gauge, the sequence matters. Then measuring compression pressure – the manual lists acceptable values. Fuel injection pressure adjustment needs a tester; the spec is given. Timing adjustment requires aligning marks – the manual shows you exactly where. There’s a dedicated tool list at the end of the section. Don’t skip that – you’ll waste time hunting for the right puller. The troubleshooting charts are organized by symptom: engine doesn’t start, lacks power, exhaust smoke color, oil consumption. Each one has a decision tree. I’ve used S-6 (engine lacks output) to diagnose a clogged air cleaner in twenty minutes.

Why OEM Documentation Beats Aftermarket Reprints

I’ve seen aftermarket manuals that swap steps, omit torque values, or redraw wiring diagrams wrong. This is Komatsu’s original print – same page numbers, same marks for revised pages, same safety notices. The “LIST OF REVISED PAGES” at the front tells you exactly which pages were updated. You’re not guessing whether the torque spec for the cylinder head is still valid. If the page has a mark, you know it was revised. That kind of traceability doesn’t exist with a scanned reprint from a third-party site. This is the real deal.

If you’re working on a Manual Transmission that’s coupled to this engine, the manual covers the flywheel and flywheel housing, including PTO shaft removal. The gear case cover and idler gear sections will help you understand the drive layout. For a deeper dive into the transmission side, check the Manual Transmission section on our site, but for the engine itself, this manual is all you need.

Is this manual for the entire 95-2 series engine or just one variant?

It covers the full 95-2 series, including the 4D95LC-2.

What torque values are listed?

The manual includes a standard tightening torque table in the foreword, plus specific torque values throughout the disassembly section. For example, cylinder head mounting bolts have their own procedure. You won’t find generic values—these are factory specs for Komatsu. The conversion table helps if you work in imperial. Do not skip the torque step; it’s what separates a running engine from a leaky paperweight.

Related manuals that pair well with this engine book: Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual (if you’re working on a wheel loader with this engine), Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual (for a skid steer variant), and Komatsu PW95R-2 Workshop Manual – 520 Pages of Factory Specs (for the excavator version). Access the Factory Manual and keep it on your bench.