Description

Komatsu PC95R-2 2001 Workshop Manual – Factory Data You Can Trust

You have a Komatsu PC95R-2 sitting in the bay, waiting on a torque spec or a control valve setting, and the aftermarket PDF you found shows a generic diagram that doesn’t match the serial break. That’s hours of your time wasted. This is the Komatsu PC95R-2 2001 Workshop Manual – the same binder Komatsu factory techs pulled from. 315 pages, January 2001 copyright, serial numbers 21D5200001 and up. Every table, every hydraulic line, every electrical connection is OEM-verified. Not a reprint, not a third-party interpretation.

Standard Tightening Torque: Why OEM Specs Matter

Page 1 of the Foreward section lists the Standard Tightening Torque table. That table alone separates a job that holds from one that leaks. Aftermarket manuals often copy a range like “70-80 ft-lbs” and call it done. Komatsu gives you exact values for every bolt grade and thread size on this machine. The manual also includes coating materials and electric wire codes – two things every shop manual should have but rarely does from other sources. If you are torquing head bolts or valve covers on this engine, you use those numbers or you risk pulling threads.

Hydraulic Section: 9-Spool and 10-Spool Control Valves

Section 10 (Structure and Function) breaks down the entire hydraulic system. You get schematics for the standard 9-spool control valve and the optional 10-spool valve used with the 2-piece boom. The manual explains the LS valve, PC valve, and how the swing motor relief valve is set from the factory. When a customer complains about slow swing or drift, you go straight to the Testing and Adjustments section – pages for measuring inner oil leakage in the swing motor and adjusting the PC valve. No guesswork on which pilot pressure is correct.

Testing and Adjustments: The 20-Section You Will Live In

Section 20 is where you spend most of your time on a worn machine. It starts with normal technical data and a list of special tools required. Then it walks you through adjusting valve clearance, measuring compression pressure, and timing the fuel injection. For hydraulics, it includes checking and regulating pressure in the main circuits, adjusting the PPC valves clearance, and setting the overload sensor switch. Each procedure references specific tools by part number – no “use a suitable socket” nonsense. If you have to bleed air from the circuits or release residual pressure before opening a line, the manual tells you the exact sequence. That is safety, not just convenience.

Disassembly and Assembly: 30 Chapters of Installed Procedures

Section 30 covers removal and installation of every major component: starter motor, alternator, injection pump, cylinder head, swivel joint, final drive, track shoes, and the entire engine-pump group. Each job includes a removal sequence and a separate installation sequence – they are not the same reversed. For example, the cylinder head removal starts with draining coolant and removing the exhaust pipe-muffler (page numbers embedded in the PDF bookmarks). The manual also contains disassembly and assembly subsections for the swing machinery, idler assembly, and recoil spring. Do not attempt to pull a valve body or final drive without the spec table in front of you.

Three Electrical Diagrams You Can Actually Read

The manual dedicates three full pages to electrical diagrams (1/3, 2/3, 3/3). These are factory drawings, not redrawn by a third party. They show wire colors, connector pinouts, and component locations. If you need to trace a solenoid valve group (ST1 or OP1) or check the overload sensor switch circuit, those diagrams are the only reliable source. Aftermarket wiring sketches often combine circuits into one sheet and leave out ground paths. This manual doesn’t.

Who Should Use This Manual

If you own a PC95R-2 and you are pulling a pump or resealing a cylinder, you need this manual on the bench. DIY home mechanics who have rebuilt smaller equipment but never touched a hydraulic excavator will find the torque tables and bleeding procedures critical. Professional shops – especially those bidding on jobs with tight labor times – save hours by not hunting for specs. The manual also covers PPC valves for blade, boom swing, and 2-piece boom, plus the travel PPC valve. That is detail you won’t find in a generic repair guide.

Source Authenticity: OEM vs. Aftermarket

This is a scanned copy of the original Komatsu publication (WEBM002700), not a web-scraped compilation. The Foreward states: “This material is proprietary to Komatsu America International Company.” That is the legal guarantee that the content came from the manufacturer. Aftermarket manuals often skip the weight table, the hoisting instructions, and the coating materials section – all included here. The Komatsu PC95R-2 2001 Workshop Manual is the only document a factory-trained technician would trust for a safety-critical job like recoil spring disassembly or swing circle axial clearance measurement.

Frequently Asked Questions

Does this manual cover removal and installation of the injection pump?

Yes. Section 30 includes a dedicated subsection for injection pump removal and installation. It follows the standard pattern: remove air cleaner hose, disconnect fuel lines, mark timing, remove pump, and then reverse for installation with specific torque values.

What torque values are listed for the cylinder head bolts?

The Standard Tightening Torque table in the Foreward gives fastener torque by class and thread size. For exact head bolt values, you must refer to the engine-specific data in Section 20. The manual does not list a single blanket number – it gives ranges based on the bolt grade.

How are the hydraulic diagrams organized – single page or multi-page?

Section 10 contains two separate hydraulic diagrams: one for standard boom configuration and one for the 2-piece boom option. Each diagram is a full-page schematic showing pump output, control valve spools, motor relief valves, and swivel joint passages. They are not combined into one confusing drawing.

Is this manual usable by someone with limited hydraulic excavator experience?

Yes, but only if you follow the steps exactly and do not skip the safety warnings. The manual writes each procedure assuming you have basic mechanical skills. You must have the special tools listed in Section 20 to perform pressure tests accurately. Skipping those tools or substituting generic gauges can lead to incorrect settings and component damage.

When you are up against a deadline on that PC95R-2, the difference between a good repair and a comeback is having the right spec in your hand. This is that spec. Access the Factory Manual and keep it on your workbench – not a tablet copy buried in a folder.

Related Manuals

• KOMATSU PC95R-2 Hydraulic Excavator Shop Manual”>KOMATSU PC95R-2 Hydraulic Excavator Shop Manual
• Komatsu PC95R-2 Hydraulic Excavator Operation & Maintenance Manual”>Komatsu PC95R-2 Hydraulic Excavator Operation & Maintenance Manual
• Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual”>Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual

For basic background on hydromechanical systems, see Manual Transmission”>this overview. And for further reading on diesel engine timing, refer to Manual Transmission”>these transmission fundamentals.