Description

Komatsu PW170ES-6K Workshop Manual – 651 Pages OEM Factory Service

You got a Komatsu PW170ES-6K on the lift that’s hemorrhaging hydraulic fluid or the engine won’t hold compression. The aftermarket PDF you found online has torque values that don’t match the factory bolts. I’ve seen guys strip threads on a final drive because they used a generic spec from a forum. That’s where this Komatsu PW170ES-6K Workshop Manual comes in. It’s the OEM shop manual, 651 pages, direct from Komatsu. No reprint, no aftermarket translation – factory diagrams, factory specs, factory tolerances.

Structure and Function: What the Manual Covers

The structure and function section (10) breaks down every major system on the PW170ES-6K. Hydraulic pumps, control valves, travel motors, swing gear, and the engine. You get cross-section drawings that show oil flow paths and component locations. If you’re chasing a pressure drop or a leaking seal, start here. The manual labels each part with a reference number, and the text explains the function. No guessing what that valve does – it’s right there on the page.

Testing and Adjusting – Why It Matters

Section 20 is where you find the actual test procedures. Need to check the pilot pressure? It gives you the port location, the expected pressure range, and the adjustment screw location. If you skip this section and just start swapping parts, you’ll waste time and money. I’ve seen technicians replace a main pump because they didn’t bother testing the relief valve setting first. The manual includes a list of required tools for each test – pressure gauges, flow meters, tachometers. Get the right tool before you start. The Komatsu factory specs are listed in imperial units, so you know exactly what you’re reading.

Skip the aftermarket PDFs.

Disassembly and Assembly: Factory Sequence

Disassembly and assembly procedures are in section 30. The order matters. For example, when removing the final drive, you have to drain the oil first, then remove the sprocket, then the hub. Do it wrong and you’ll damage seals. The manual shows the bolt tightening sequence for the swing gear and the travel motor. Torque values are in foot-pounds. If you don’t have a torque wrench that reads in ft-lbs, get one. Don’t guess. The manual also lists special tools – pullers, bearing splitters, and seal drivers. Use them.

Maintenance Standard: When to Replace Parts

The maintenance standard section (40) is the reference you’ll use most often. It contains wear limits, clearance specs, and torque values for every bolted joint on the machine. Need to know if the hydraulic cylinder rod is within spec? It gives the maximum outer diameter reduction. Wondering if the piston ring gap is acceptable? The manual lists the standard and limit values. This is where you stop guessing and start measuring. Use a micrometer, not your eye. The maintenance standard section also includes the tightening torque for all bolts – from the cylinder head to the track adjuster. If you’re rebuilding the engine, you need page 40-1 for the head bolt torque sequence. The section also covers the hydraulic cylinder rebuild specs – piston seal clearance, gland nut torque, and rod runout limits. For the swing gear, it lists the backlash and tooth contact pattern. For the travel motor, the valve plate flatness tolerance. Every critical measurement is there. You don’t have to guess if a part is reusable – the manual tells you the maximum allowable wear. That’s the difference between a repair that lasts and one that fails in 50 hours.

651 Pages: Why Page Count Matters

This isn’t a condensed operator’s manual. 651 pages means every system is covered in depth. The revision list on page 00-2-1 shows factory updates – pages that were added or replaced. That tells you the manual is kept current. If you’re using a thin aftermarket manual, you’re missing details. The thickness of this manual reflects the complexity of the machine. You get the same information a Komatsu dealer technician uses.

For reference, the companion KOMATSU PW170ES-6K Operation & Maintenance Manual covers daily checks and routine service. If you need the full repair procedures, this workshop manual is the one.

Who Needs This Manual?

If you own or service a Komatsu PW170ES-6K, this manual belongs on your bench. Home garage enthusiasts who maintain their own equipment – you’ll avoid the expensive mistakes that come from guessing. Professional mechanics – you’ll save billable hours by having the correct spec at your fingertips. The manual uses imperial units, so no conversion headaches. It’s written for technicians who speak the language of foot-pounds and thousandths of an inch.

OEM vs. Aftermarket: Why Authenticity Matters

This is a genuine Komatsu publication, not a third-party compilation. The list of revised pages shows factory updates. Aftermarket manuals often omit critical details – like the hydraulic pressure test port locations or the specific tightening sequence for a multi-bolt flange. I’ve had customers bring in engines that failed because they used an aftermarket manual that listed the wrong torque for the main bearing caps. Don’t take that risk. Stick with the OEM source. If you want a more specific version, check out Komatsu PW170ES-6K 2001 Workshop Manual – OEM Specs or Komatsu PW170ES-6K 2001 Workshop Manual – OEM Specs & Procedures.

For background on transmission systems, the Manual Transmission article on Wikipedia explains the basics. And if you need to understand the planetary gear system in the final drive, the Manual Transmission page covers the principles. But for the actual repair procedure, you need the factory manual.

Frequently Asked Questions

Does this manual cover the full hydraulic system?

Yes, the structure and function section (10) covers the hydraulic system in detail.

Are torque specs included for all bolts?

Torque values are in the maintenance standard section 40. You’ll find specs for cylinder head bolts, connecting rod caps, main bearing caps, and all hydraulic fittings. The manual uses foot-pounds. I’ve seen too many engines ruined by assuming a generic torque. Always get the factory number from page 40-1. Don’t rely on memory – look it up. The manual also gives tightening sequences for multi-bolt assemblies. For example, the cylinder head requires a specific pattern and multiple steps. If you skip a step, you risk warping the head. That’s the kind of detail you get from OEM documentation.

Is this manual suitable for a beginner?

If you’re new to heavy equipment, this manual shows you the correct procedures. But you need basic mechanical skills and the right tools. It’s not a ‘how to use a wrench’ guide – it’s a factory reference.

How is the manual organized?

Four main sections: structure, testing, disassembly, and maintenance standards. Each section is numbered and starts with a page number like 10-1. The index is at the front. Pretty straightforward.

Don’t spend another afternoon chasing a spec that doesn’t exist. Access the Factory Manual from AutoRepairManuals and get the OEM data you need to do the job right.