Description

Komatsu 6D170-2 2000 Technical Manual – Factory OEM Shop PDF

If you’ve ever been halfway through a rebuild and realized the torque chart in some third-party PDF doesn’t match the bolt grade you’re holding, you know the frustration. That’s why I don’t touch a Komatsu 6D170-2 without the Komatsu 6D170-2 2000 Technical Manual. This is the factory document — 353 pages, printed in Japan in 2000, and still the only source I trust for disassembly, specs, and repair on this diesel engine. No aftermarket interpretation, no skipped steps.

7 Major Sections Cover the Engine Hardpoints

The manual is laid out in seven numbered sections, starting with 01 General (page 01-1) for overall specs like mass and performance curves, then moving through 11 Construction and Operation (page 11-1) covering intake/exhaust, lubrication, fuel, cooling, and electrical systems. Section 12 (page 12-1) is where you find check and adjust procedures — calibration data and troubleshooting. Section 13 (page 13-1) goes deep into disassembly and assembly, with a list of special tools. Section 14 (page 14-1) gives maintenance standards for every component — turbocharger, cylinder head, valves, bearings, camshaft, oil pump, water pump. Section 15 (page 15-1) covers repair and replacement of these parts. That’s seven sections, 353 pages, no filler.

Torque Specs: Why the Factory Manual Matters

You don’t guess head bolt torque on a 6D170-2. The preface contains a dedicated table of normative tightening torques. That table isn’t a suggestion — it’s the value Komatsu stamped on the assembly line. I’ve seen aftermarket manuals that list the same torque for cast iron and aluminum heads, which is a shortcut that’ll cost you a gasket job or worse. This manual breaks out torque values by thread size and grade. Page 00-3 lists the safety notes, but the torque data is in the front matter. If you’re rebuilding the engine, you need those numbers.

What Does Section 12 Cover – Check and Adjust?

Section 12 is where you go when the engine runs rough or won’t start. It includes calibration data for the fuel system, output parameter checks for the electrical system, and the entire troubleshooting section (labeled S). You get step-by-step voltage tests for the alternator, injector timing checks, and compression test procedures. No vague flowcharts — actual pressure and resistance values. For background on the fundamentals of a Manual Transmission, that’s another topic, but when you’re inside this engine, Section 12 is your diagnostic backbone.

Disassembly and Assembly: Section 13

Section 13 starts with a list of special tools — part numbers included — then walks you through disassembly, cleaning of the cylinder block and crankshaft, measuring every clearance, and reassembly. The manual tells you to measure the cylinder liner bore, piston pin clearance, and main bearing oil clearance before you even think about putting it back together. Page 13-1 kicks off the section. I’ve watched techs skip the measurement step and end up with a knock on startup. Don’t be that guy.

Source Authenticity: OEM vs Aftermarket

This is a direct scan of the original Komatsu factory manual, published in 2000. The document revision list on page 00-2-1 tracks every corrected page — that’s how you know it’s been maintained. Aftermarket manuals often omit the revision history and reprint outdated diagrams. I’ve seen wiring colors swapped because a third-party editor assumed a common standard. In the Manual Transmission world, that kind of error can lock you out of gear selection. For this engine, the OEM wiring symbols and torque tables are intact. No copy, no generic data.

Does this manual cover the fuel injection pump calibration?

Yes, Section 12 includes calibration data for the fuel system.

Can I use this manual for the 6D170-1 or 6D170-2A?

This manual is specific to the 6D170-2 as of 2000. While some components may carry over to earlier or later variants, the torque values, clearances, and wiring diagrams are for the 6D170-2 only. If you need a different year, check out KOMATSU 6D170-2 2002 Workshop Manual or Komatsu 6D170-2 2005 Workshop Manual – 341 Pages of Factory Specs. For a related machine, see Demag Komatsu H285 S Technical Manual – Shop PDF 498 Pages.

You get 353 pages of factory data, from the preface safety notes through Section 15’s replacement procedures. Access the Factory Manual and get the genuine specs for your 6D170-2. That’s the only way I’d trust a rebuild.