Description

Clark-hurth C500 1983 Repair Manual – Factory Overhaul Guide

If you’re rebuilding a Clark-hurth C500 industrial truck in your shop, you need the 1983 factory manual. I’ve seen guys try to work through a top-end job with a third-party CD that had wrong camshaft timing and no valve lifter installation data. That’s how you end up with a bent pushrod and a customer screaming about downtime. This manual is the original OEM print from Clark-hurth, 640 pages thick, and it does not let you guess.

Every time I pull a cylinder head on a C500, I go straight to GROUP 00 SECTION 3 (Gas). The CYLINDER HEAD OVERHAUL section lists bolt torque sequence and the step-by-step for removing the valve train without breaking a guide. For the diesel model—the Clark (Waukesha) D155D—GROUP 00 SECTION 4 gives you the fuel injection pump timing procedure and the exact clearance for new camshaft installation. That’s the difference between a runner and a parts core.

Cylinder Head Overhaul: Gas vs Diesel

You can’t treat the gas and diesel engines the same. The manual dedicates separate subsections for each. For the gas engine, the cylinder head reassembly procedure includes the gear timing marks—page 3 has the foreword, but the gear timing is in the lower engine overhaul section after disassembly. For the diesel, you get the INSTALLATION OF NEW VALVE LIFTERS ALONG WITH NEW CAMSHAFT procedure. That alone saves you from having to call around for the lifter preload spec. I keep a copy of this manual in the toolbox because I trust the factory timing gear backlash data more than any aftermarket source.

Fuel Injection Test & Maintenance (Diesel)

Fuel system work on the D155D can get expensive fast if you pull the injection pump without marking the timing. GROUP 00 SECTION 4 includes FUEL INJECTION TEST & MAINTENANCE – it shows you how to bench-test the injectors, check pop pressure, and re-time the pump to the engine. No generic chart will tell you the correct backlash for the timing gears on that engine. This manual does. And if you’re working on the LPG variants, the manual covers the IMPCO lock-off valve and vaporizer-regulator in Group 02 sections 5–8. Don’t trust an eBay PDF that claims to cover it; this is the real dealer-only document.

Transmission Rebuild: Hydratork and Manual

I’ve pulled apart more Hydratork H-200 transmissions than I can count. The 1-speed and 2-speed forward/reverse models have specific clutch pack clearances and seal specs that are not published anywhere else. The manual gives you the selector pack reassembly steps and the fluid seal specifications. For a manual transmission, look at the R200 1-speed section—the PARKING BRAKE DISASSEMBLY AND REASSEMBLY is in there. If you’re rebuilding a Manual Transmission, this is the source document. The same applies to the Manual Transmission models covered in the R200T section. The book also includes the Sun Tester procedure for checking transmission oil pressure—something your parts store can’t tell you.

Why OEM Documentation Over Aftermarket

Aftermarket repair guides often merge different model years into one ambiguous procedure. This 1983 manual is specific to the C500. It includes the original Clark-hurth foreword that states: “Look alike parts from other supplies never work as well as the original parts.” That’s the same attitude I take with repair data. The safety messages are printed in the front, and each group has its own torque specs. You get the BASIC ENGINE DATA tables for both gas and diesel, plus the fluid capacities. No reprint, no generic compilation—just the factory binder reproduced as a digital file.

3 Systems That Could Save Your Engine

The manual covers the exhaust emission system for the Perkins diesel variant as well. If you’re retrofitting low-emission equipment, Section I of the emission system chapter gives the field installation steps. The Zenith carburetor sections (2267 LW 10, LX 9, and the 68 series) are fully detailed. I’ve used the Bendix-Zenith carburetor rebuild data to fix a lean condition that stumped three other guys. The manual also includes the Delco-Remy starter and alternator overhaul sections (GROUP 11 and 12).

One more thing: the HYDRAULIC PUMP OVERHAUL sections cover both vane and gear pumps, including the Parker Hannifin unit and the Vickers CM11 valve disassembly. The tilt lock valve troubleshooting procedure saved me two hours on a lift that wouldn’t tilt back. I don’t waste time with guesswork when the factory tells me exactly which o-ring goes where.

FAQ

Does this manual cover the diesel engine?

Yes, section 4 covers the Clark D155D.

What about the LPG system?

Group 02 sections 5 through 8 cover the IMPCO LPG lock-off valve, vaporizer-regulator, and carburetor. The manual includes disassembly and reassembly procedures, torque specs, and adjustment data. You’ll also find the Bendix-Zenith carburetor overhaul in Section II through IV. The LPG system is complex; the manual shows the exact routing of hoses and the lock-off valve testing procedure. Always use the factory specs for the vaporizer adjustment because aftermarket guides often skip the pressure settings.

If you’re serious about keeping that C500 running without repeat repairs, Access the Factory Manual. It’s the only source I trust for torque sequences, valve lifter installation, and fuel injection timing. I’ve torqued more head bolts than most people have had hot meals, and I won’t use anything else.