Description

Komatsu PW170-5K 1995 Workshop Manual

If you are wrenching on a Komatsu PW170-5K 1995 Workshop Manual machine, you already know what happens when you guess a torque spec. Something cracks, leaks, or worse – a joint fails under load. I have seen it more times than I care to count. This is not a reprint of some aftermarket scrap. This is the actual OEM shop manual Komatsu printed in Belgium in 1995, 410 pages thick, covering serial number K20001 and up. It tells you exactly how the engineers intended the machine to be taken apart and put back together. No shortcuts, no fluff – just the factory data you need to keep the PW170-5K running.

The manual is split into four main sections: Structure and Function, Testing and Adjusting, Disassembly and Assembly, and Maintenance Standard. Each section is numbered and cross-referenced with revision marks so you know which pages were updated. I have used factory manuals for twenty-eight years, and I can tell you – the difference between a Komatsu OEM document and a third-party PDF is the difference between a calibrated torque wrench and a pipe wrench. You get the real thing here.

Structure and Function: What the Manual Covers

Section 10 (starting at page 10-1) covers the hydraulic system layout, the control valve function, and the swing mechanism. If you need to understand how the pilot pressure interacts with the main spools, this is where you look. The manual includes exploded diagrams with part numbers, not vague sketches. It also warns you about specific safety interlocks – for example, the parking brake release sequence. Missing that step can cause the machine to roll on a slope. I have seen a junior tech skip that and get a nasty surprise. Do not be that guy.

Why Factory Testing Procedures Matter

Section 20, Testing and Adjusting, starts at page 20-1. This is where most backyard mechanics get into trouble. They fire up the machine, listen for noises, and start turning screws. The factory procedure tells you to check charge pressure at the test port before adjusting anything. Those numbers are not suggestions – they are the result of years of engineering. If you do not have the correct pressure, the transmission will slip or the pump will cavitate. The manual gives you the exact flow rates and pressures in imperial units. I have used this section to diagnose a bad relief valve in under an hour. Without it, you would be swapping pumps and praying.

Disassembly and Assembly: Common Mistakes

Section 30 (page 30-1) is where you will find the step-by-step sequence for pulling the final drive, the travel motor, and the swing gearbox. The manual lists the special tools required – for example, the puller for the sun gear bearing. I have seen guys try to use a three-jaw puller on that and break the carrier. The manual also gives the tightening sequence for the drive flange bolts. Overtorque one and you warp the flange. Undertorque and it walks loose. The factory spec is in the manual. Use it. Also, the manual covers the 1006-6T engine, but for detailed engine work you will need the separate 1000 Series Engine Shop Manual. If you need more coverage on similar Komatsu excavators, check out the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual or the Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual for wheeled models. For the PW95R-2, the Komatsu PW95R-2 Workshop Manual – 520 Pages of Factory Specs is another solid resource.

Maintenance Standard: Know Your Limits

Section 40, Maintenance Standard, gives you the wear limits for every component – track bushing ID, sprocket tooth thickness, hydraulic cylinder rod diameter, and so on. This is the data that keeps you from putting a worn part back in and having it fail again in a week. The manual lists the inspection intervals and the acceptable tolerances. I have a habit of writing the limit values on the inside of the access panel with a Sharpie – that way I do not have to flip pages every time. But you need the book to get the numbers in the first place. The 1995 edition is still valid for any PW170-5K up to the current serial range. Komatsu did not change the core specs on these machines until the -6 series came out.

3 Reasons to Choose OEM Documentation

First, the wiring diagrams are not generic. The manual shows the exact wire colors, connector pinouts, and diode locations for the PW170-5K. I have seen aftermarket diagrams with the wrong pin numbers – that can fry a controller. Second, the torque values are factory-tested. The manual gives you the bolt grade and the tightening angle for wet vs dry threads. Third, the safety warnings are embedded in the steps. The manual tells you to relieve hydraulic pressure before disconnecting hoses. That is not a suggestion – it is a requirement. If you want to learn more about how a Manual Transmission works, you can look that up, but this manual is specifically for the Komatsu powertrain. For a broader understanding of how transmissions function, the Manual Transmission page on Wikipedia is a decent primer, but it will not help you set the clutch clearance on a PW170-5K.

FAQ – Common Questions About This Manual

Does this manual cover the 1006-6T engine?

Yes, it does. The manual states that the PW170-5K mounts the 1006-6T engine. However, for detailed engine overhaul procedures, Komatsu directs you to the separate 1000 Series Engine Shop Manual. This one covers the engine in the context of the machine – mounting, vibration dampers, and cooling system.

What serial numbers does this manual apply to?

K20001 and up. That is printed on the cover page. If your machine is older than that, some components may differ.

Are the torque specs given in imperial units?

Yes, the manual uses lb-ft and lb-in. Komatsu factory manuals for North America always include imperial values. You will find final drive bolt torque specifications in Section 30.

Is this a digital access or a physical book?

This is a digital PDF of the original 1995 printed manual. You get all 410 pages as a searchable document. No reprints, no third-party edits – just the scan of the factory book.

Look, I have been in this trade long enough to know that a good manual pays for itself the first time you avoid a misdiagnosis. The Komatsu PW170-5K is a reliable machine, but only if you treat it with the specs it was built to. Stop guessing. Access the Factory Manual and get the right data on your bench.