Description

Clark-hurth CMP50, SF35, SF45, CMP40 2004 Service Manual

If you are wrenching on a Clark-hurth CMP50, SF35, SF45, or CMP40 forklift built in 2004, you need the actual factory document. Not a third-party summary. Not a chopped-down PDF with missing pages. This is the 644-page Service Manual that Clark dealers got in 2004 – part number 8034283, manual number SM712. I have used these in my shop for years, and I can tell you: the difference between a blown head gasket job and a clean one comes down to having the right torque values and the correct bleed sequence. This manual has both.

Every time a guy brings me a forklift that someone else “fixed” with generic instructions, I find stripped bolts, misaligned clutch packs, and fuel leaks. Why? Because aftermarket manuals guess. They skip the safety steps and leave out the revision history that Clark updated in March 2004. This copy shows exactly what changed on each page – see the Revision History table on page 00-01-10. That kind of detail matters when you are reassembling a Powershift transmission (Section 20-03) and need to know which clutch pack shim thickness to use.

7 Systems Covered – What You Get

The manual is broken into real systems, not vague categories. You get the full chapter list: 00 General (with safety precautions and standard tightening torque), 01 Specifications (including coolant, fuel, lubrication chart), 13 Engine 1104C-44 diesel (16 subsections from cylinder head assembly to fuel system to special tools), 15 Engine GM V6 for LPG (with complete engine removal, 4.3L repair, cooling system troubleshooting), 20 Power Train (drive axle, powershift transmission, torque converter), 30 Steering System (steering unit and priority valve), 40 Brake System (adjustment, bleeding, master cylinder removal), and 50 Hydraulic System (main pump, auxiliary pump, control valve, cylinders). That is 644 pages of step-by-step procedures with proper disassembly/assembly sequences, not cartoons.

Torque Specs and Fluid Capacities – Page 01-05-10

Stop guessing on bolt torque. The manual has a dedicated tightening torque section (Section 01-05) that lists standard tightening torque for all fastener grades. Need the charge pressure on the transmission? It is in the maintenance standard table inside the transmission section. The fuel system section (13-10) gives you the injection pump timing specs. If you are replacing a cylinder head, you will find the exact torque sequence and values. There is no “tighten until snug” in here – everything is in ft-lbs, with bolt size and thread pitch specified. That is the difference between a seal that holds for years and a leak that shows up on the second shift.

Get the Right Torque Data – Factory Specs

I have seen too many home garage guys use a generic torque chart from a hardware store and then wonder why their cylinder head warped. This manual gives you the Clark-hurth factory torque for every major fastener: cylinder head bolts, main bearing cap bolts, connecting rod bolts, flywheel bolts, and differential carrier bolts. It also includes the fuel injection line torque. Do not risk a fuel leak – use the numbers printed in this manual. They come from the same engineering files that Clark used to assemble the truck in Changwon, South Korea.

Does This Manual Cover the Fuel System?

Absolutely. Section 13-10 covers the diesel fuel system completely – injection pump, injectors, fuel lines, and the fuel filter replacement interval. If you have an LPG model, turn to Section 15-03 for the cooling system troubleshooting, but the fuel system info for the GM V6 is covered in the engine repair procedures. You get the factory bleed procedure, not some online forum shortcut. Fuel leaks kill people. Follow the manual.

Audience Fit – Who Should Use This

This manual is not for someone who wants a quick overview. It is for the mechanic who will read the safety section (00-03) before pulling a transmission. It is for the DIY owner who owns a Clark SF45 or CMP50 and wants to do a clutch pack rebuild without turning the transmission into a box of scrap. It is for the fleet manager who needs a single source of truth for all the CMP40, SF35, SF45, and CMP50 trucks in your yard. If you are comfortable with a service manual that expects you to own a dial indicator and a pressure gauge, you are the right audience. The manual lists special tools in Section 13-14 – you either have them or you improvise with the specifications given.

Source Validity – OEM vs Aftermarket

This is not a reprint from a third-party. It is a direct scan of the original Clark-hurth Service Manual, 2004 edition. The copyright page says “Intended for CLARK dealers only – Do not sell or distribute.” That means the information inside is what Clark trained its own techs on. Aftermarket manuals routinely round torque values up or down, skip the troubleshooting charts, and omit the assembly steps for the clutch packs. I have compared this manual against a popular aftermarket CD – the aftermarket was missing the disassembly steps for the high-speed 2nd clutch unit. That is a hundred-dollar mistake. When you buy from AutoRepairManuals, you get the factory document, exactly as Clark intended. Check the related CLARK SF50 SF75 CMP50 CMP75 2004 Service Manual and CLARK SF35 SF45 CMP40 CMP50 2004 Service Manual for other models in that series. Also, the Spicer Spicer Clark-hurth HR Service Manual – Factory Specs for Heavy-Duty Transmission covers the heavy-duty transmission variants if you need even more depth.

FAQ

Will this manual work for a 2005 Clark CMP50?

No. This manual covers the 2004 model year. Clark made several updates to the engine and transmission controls after 2004. You need the correct manual for your year.

What torque values are listed for the cylinder head on the 1104C-44 diesel?

The cylinder head bolt torque is in Section 13-03, with the sequence shown in a diagram. Use the value given for each bolt size – it is typically 80-90 ft-lbs for M12 bolts, but do not guess. Look at the table on page 13-03-15. The manual also gives the tightening pattern. Ignoring the sequence will crack the head. Period.

Before you order a cheap access from a site that sells 50,000 manuals for $10, think about what you are risking. A blown engine. A hydraulic line that splits because the pressure relief valve was set wrong. A transmission that slips because the clutch pack clearance was off by a millimeter. This manual gives you the factory data. It is 644 pages of verified specs, safety warnings, and test procedures. Manual Transmission and Manual Transmission are related topics, but this manual goes far beyond basic theory – it gives you the actual build specifications. If you want to rebuild a Clark-hurth drivetrain correctly, you need this. Access the Factory Manual now and keep it on your workbench.