Clark-hurth CMP 15-30 2000 Service Manual – OEM Repair Data

Description

If you have ever tried to rebuild a Clark-hurth mast cylinder using a third-party manual that lists the wrong snap ring depth, you know the feeling. That sinking moment when the hydraulic fluid leaks past a seal you seated per the aftermarket instructions — and now you are pulling the cylinder apart again on a Saturday. I have been turning wrenches in San Antonio for twenty-eight years, and I have seen it all. That is why for these Clark-hurth CMP 15, CMP 18, CMP 20, CMP 25, CMP 30 2000 Service Manual is the only thing I will let my junior techs touch when we have a CMP in the bay.

Engine Overhaul: 4G63/4G64 Gasoline and 4TNE88/4TNE92 Diesel

You get two complete engine chapters. The 4G63/4G64 section includes compression test procedures, timing belt replacement sequence, and cylinder head torque values. The 4TNE88/4TNE92 diesel chapter gives you the cross-sectional views of the block, special tool list, and the torque specs for the cylinder head bolts. Page 1 of the manual shows the revision date — October 2000, third revision. That means Clark-hurth updated the torque values from earlier editions. Do not trust an old photocopy from 1998.

Transmission TA18 & TA12: Rebuild Data

The TA18 and TA12 transmissions are covered in their own repair section. You get the clutch pack clearance specs, the exact shim thicknesses, and the hydraulic pressure test ports. Need the charge pressure? Look in the transmission manual section — the data is cross-referenced to the main hydraulic circuit. If you are pulling the transmission on a CMP 25, the manual shows you the correct lifting points and the sequence for removing the torque converter housing. No more guessing the bolt torque on the bellhousing.

Braking/Inching: Factory Specs and Adjustments

The braking/inching chapter (Group 23) goes into the service brake assembly, brake valve priority sensing, and the inching control valve. The manual diagrams the mechanical linkage between the inching pedal and the service brake pedal. For the parking brake adjustment, it tells you the cable tension spec in inches of travel. The priority sensing port pressure is listed right there — no need to call Clark-hurth tech support on a Friday afternoon. Page 2 of the manual explains how each page ID works: group-section-page. Once you understand that numbering, you can jump straight to the braking specs without flipping through 468 pages blind.

Hydraulic Circuit: Pump and Control Valve Overhaul

Hydraulic section covers the main pump, control valve, and cylinder repairs. It tells you the exact O-ring sizes for the spool end caps. The mast lift cylinders have a specific tightening sequence — the manual lists it in foot-pounds, not in Newton-meters. If you are replacing the packing on a CMP 20 mast, the manual gives you the step-by-step for removing the cylinder without damaging the chrome rod. It also includes the priority valve disassembly for when the steering loses power under load.

3 Reasons to Choose OEM Documentation

I have seen aftermarket manuals that claim to cover the CMP 15 through CMP 30 and then skip half the diesel engine section. This is the original Clark-hurth factory manual from 2000. The TOC lists every sub-section — from “Enduits d’etancheite” (sealants) to “Couple de serrage” (torque specifications). The manual is 468 pages, not a 200-page condensed version. It includes the periodic maintenance schedules, the special tools list with part numbers, and the wiring diagrams for the electrical system. You want to fix the starter circuit? Go to the electrical section. It shows the full schematic and the starter rebuild steps.

Does This Manual Cover the CMP 25 Diesel?

Yes. The diesel engine chapter covers both the 4TNE88 and 4TNE92. The CMP 20 and CMP 25 often came with the 4TNE92. The manual gives you the injector timing specs, the glow plug circuit test, and the cooling system capacities in quarts. You also get the fuel system — both LPG and diesel fuel circuits are covered. The LPG section includes the vaporizer adjustment and the solenoid valve test procedure.

FAQs about the Clark-hurth CMP Service Manual

Will this manual work for an older CMP 15 built before 2000?

Possibly. The 2000 edition is the third revision, so it supersedes earlier prints. Some part numbers may differ for very early models, but the overhaul procedures for the engines and transmissions remained largely the same. Check your serial number against the manual’s coverage table. If in doubt, the manual also references SM 5184, which is the core document for these CMP models.

Are the torque specs in foot-pounds?

Yes. The manual lists all critical torque values in foot-pounds (lbf·ft). For example, the cylinder head bolts on the 4G63 engine are specified at 55–60 lbf·ft in the sequence diagram. Do not use metric-only conversion tables — stick with what the factory printed.

I have seen guys ruin a head gasket because they used a generic spec from an online forum. If you are serious about keeping a CMP 15, CMP 18, CMP 20, CMP 25, or CMP 30 running, get the genuine factory document. The manual covers the mast chains, counterweight removal, steering cylinder rebuild, and the complete electrical troubleshooting tree. Access the Factory Manual from AutoRepairManuals and keep it on your shop tablet. You will save yourself the headache of chasing wrong specs.

Related manuals you might need: Spicer Clark-Hurth HR Transmission Service Manual, Clark-hurth 55A SERIES II Service Manual – 136 Pages of Factory Specs, and Clark-hurth SM-715, TMX12-25, EPX16-20s 2007 Service Manual – 502 Page OEM Facto. For background on manual vs. automatic transmissions, see Manual Transmission and Manual Transmission.