Description

Komatsu PC200-5, PC200LC-5, PC220-5, PC220LC-5 1992 Workshop Manual

You’ve got a Komatsu excavator on the lift – PC200-5, PC200LC-5, PC220-5, or PC220LC-5. Maybe the engine’s running rough, or the hydraulics are drifting. Without the right specs, you’re burning billable hours and risking a comeback. That’s where this Workshop Manual comes in. Not some third-party compilation with rounded-off torque numbers. This is the actual factory document from 1992, 662 pages thick, printed in Japan. I’ve been torquing head bolts since before some of you were born, and I’ve seen what happens when a tech relies on a generic online guide. Loose bolts, blown seals, wasted time. This manual stops that.

Every system in this machine breaks down in the order you’d actually work on it. Starts with ENGINE RELATED PARTS AND ENGINE MOUNT, then moves through the FUEL TANK AND PIPING, the hydraulic circuit, and the swing machinery. If you’re dealing with a no-start or low power, you’ll find the FUEL system diagnostics on page 20-1. Speaking of fuel, the Valve clearance adjustment procedure is right there too – with the factory feeler gauge spec, not some aftermarket suggestion.

Structure and Function: Engine and Hydraulic Systems

You need to understand how the components fit together before you start wrenching. The STRUCTURE AND FUNCTION section (starts page 10-1) covers everything from the RADIATOR OIL COOLER AND AFTER-COOLER to the OLSS (OPEN CENTER LOAD SENSING SYSTEM). It shows the hydraulic circuit diagram, the pump layout, and the CONTROL VALVE assembly. If you’ve ever had to trace a pressure drop in the travel circuit, the TRAVEL MOTOR section gives you the exploded view and the seal part numbers. No guessing which O-ring goes where – it’s all right there.

What Torque Values Are Listed?

Torque specs are what separate a repair from a disaster. This manual lists the factory tightening sequence and torque for the cylinder head bolts, main bearing caps, and the hydraulic fittings. For the FUEL INJECTION TIMING adjustment, you get the dial indicator setup and the static timing mark alignment – down to the degree. The TESTING AND ADJUSTING chapter includes a TABLE OF JUDGEMENT STANDARD VALUE that tells you the acceptable compression pressure range and the valve clearance hot and cold. I’ve seen techs snap injector lines because they used a generic torque. Don’t be that guy.

3 Reasons to Choose OEM Documentation

First, the wiring diagrams. The ELECTRICAL WIRING DIAGRAM section (page 30-1 in disassembly) shows connector pinouts and wire colors as they left the factory. Aftermarket manuals often change colors to match their own convention – that gets you a short circuit and a controller replacement. Second, the troubleshooting charts. The TROUBLESHOOTING OF ENGINE THROTTLE CONTROLLER SYSTEM (E MODE) has step-by-step fault codes (E-1 through E-12) with specific tests. Third, the PEMC SYSTEM and EMACC explanations are only in this OEM version. Third-party summaries leave out the safety lock valve logic and the governor motor linkage adjustment.

Get the Right Valve Clearance Specs

Adjusting valve clearance on the S6D95L or SA6D95L engine? The procedure is on page 20-1. You’ll need a feeler gauge set (metric), a socket set, and a torque wrench that reads in ft-lbs. The manual tells you to rotate the crankshaft to the correct compression stroke position for each cylinder. Don’t try to do it by sound – you’ll end up with a burnt valve. The factory spec for intake and exhaust are listed separately, with the allowable tolerance. I’ve used this manual on a PC220-5 that had a ticking noise – turned out the previous mechanic had set the clearance too tight. One adjustment and it ran quiet.

Troubleshooting the Engine Throttle Controller System

When the self-diagnostic display shows error codes like E-2 (short circuit in governor motor) or E-5 (abnormality in governor potentiometer), this manual walks you through the test points. It gives the STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM with voltage and resistance readings at each connector. The CONNECTION TABLE FOR CONNECTOR tells you which pins to probe. If you’re working on a machine that won’t start and the monitor panel is dark, the manual has a dedicated flow chart for E-1. I’ve seen technicians replace the entire throttle controller only to find out it was a corroded battery relay wire. The manual would have caught that in 10 minutes.

Who Should Own This Manual

If you’re a DIY mechanic with a Komatsu excavator on your property – maybe a PC200LC-5 you bought at auction – this manual pays for itself the first time you adjust the injection timing instead of paying a dealer $300 an hour. If you run a small shop, having the OEM specs for the PC220-5 means you can take on repairs you’d otherwise turn away. Beginners: don’t skip the safety warnings. The manual has a PRECAUTIONS WHEN CARRYING OUT MAINTENANCE list that covers releasing remaining pressure in the hydraulic circuit and bleeding air from the system. Follow it. I’ve seen a tech blow a fitting off because he didn’t depressurize first. Not pretty.

For related machines, check the Komatsu PC200-5, PC220-5 1993 Workshop Manual | OEM Factory Specs – 473 Pages for a later model year, or the Komatsu PC200, PC200LC, PC220, PC200-5 Workshop Manual | 662 Pages for a broader coverage. If you work on smaller loaders, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual might be useful too. For other types of equipment, see the Manual Transmission resources available on this site. And if you’re comparing transmission systems, the Manual Transmission page covers fundamentals.

FAQ

Does this manual cover the S6D95L engine?

Yes. The PC200-5 models use the S6D95L; the PC220-5 models use the SA6D95L. Both are covered in the engine sections and the 95 Series Engine Shop Manual is referenced for additional detail.

What about the electrical wiring diagrams?

The manual includes full ELECTRICAL WIRING DIAGRAM and ELECTRICAL CIRCUIT DIAGRAM sections, with connector positions and pin assignments for the pump controller and engine throttle controller.

Is it a paper copy or digital access?

It’s a digital PDF of the original factory printed manual. You get all 662 pages as scanned, searchable images.

How do I know my serial number is included?

The manual covers PC200-5 serial 45001 and up, PC200-5 MIGHTY 58019 and up, PC200LC-5 45001 and up, PC200LC-5 MIGHTY 58019 and up, PC220-5 35001 and up, PC220LC-5 35001 and up. If your machine falls in those ranges, this manual matches.

If you want to stop guessing and get the real factory specs for your Komatsu PC200-5, PC200LC-5, PC220-5, or PC220LC-5, Access the Factory Manual and put it on your shop tablet. Your torque wrench will thank you.