Description

Clark-hurth SM-715, TMX12-25, EPX16-20s 2007 Service Manual

If you’re working on a Clark-hurth lift truck and you don’t have this 502-page factory service manual, you’re guessing. And guessing on a hydraulic system or a drive axle overhaul costs you time and money. I’ve been turning wrenches since before some of you were born, and the difference between getting a job done right and having to redo it because of a wrong torque value or a misread wiring diagram is the difference between a shop that makes money and one that doesn’t. This is the OEM document from Clark-hurth, not some third-party rewrite. It covers the SM-715, TMX12-25, and EPX16-20s models from 2007.

Wiring, Switches, and Instruments – Factory Diagrams Mean No Guesswork

Group 13 in this manual is where you’ll find the real meat. Schematic electric circuit diagrams, general electrical service tips, wiring and cables, switches and sensors, and the instrument panel. I’ve seen techs spend half a day chasing a ghost in the harness because they were using a generic schematic. The factory diagrams in this manual show each pin, each wire color, and each connector location. Page 13-1-1 starts the schematics. If you’ve ever swapped a sensor on a TMX12-25 without verifying the circuit, you know what I’m talking about.

Drive Axle Overhaul: Group 20 – Don’t Skip the Fluid Check

Drive axle work on these trucks requires precision. Group 20 gives you the specifications, the fluid check and change procedure, troubleshooting steps, removal and installation, then the full overhaul. The overhaul section for the SM-715 runs from page 20-5-1 through 20-5-18. Torque specs for the axle bolts? Right there. Bearing preload? Listed. If you skip the fluid change step on page 20-2-1, you’re asking for contamination to wreck the new bearings. I’ve had to tell junior techs more than once: follow the sequence, don’t shortcut the check.

Brake System: Specifications and Bleeding Procedure

Group 23 covers the brakes from specs to overhaul. That includes the brake fluid check, fill, and bleed procedure on page 23-2-1, plus the pedal and master cylinder removal, replacement, and adjustment. The parking brake adjustment section at 23-5-1 is critical – I’ve seen units fail safety inspections because that step was skipped. The overhaul section (23-6-1) shows you how to rebuild the calipers. Page 73 holds the charge pressure specs for the hydraulic system, which ties into brake function. Aftermarket manuals often omit those pressure check steps.

Motor Controls and ZAPI Handset Programming – Factory Settings You Can Trust

Group 19 is where the electronics guys live. Description, use of the ZAPI handset for programming and adjustments, control troubleshooting, and the TMX factory control settings. The sequence of operation walks you through connecting the battery, closing the key switch, system checks, traction system, pump control, and accessories. If the control unit locks you out, you need the factory settings on page 19-4-1. I’ve dealt with aftermarket code sheets that were flat wrong – the OEM settings here are verified. For older models, see the Clark-hurth 55A SERIES II Service Manual – 136 Pages of Factory Specs.

Source Validity: OEM vs Aftermarket – Why This Manual Wins

This is not some reprint or compilation. It’s the original Clark-hurth service manual, 502 pages, printed November 2007, with a full revision history. Every page has a revision mark so you know which updates have been applied. The safety section (Group SA) covers lifting, jacking, blocking, and towing – procedures that aftermarket manuals often gloss over. I’ve seen technicians use a condensed aftermarket guide and install a steering axle backward because the diagram was mirrored. That doesn’t happen when you have the factory document. For the CMP series, check the Clark CMP 50/60/70/75S Service Manual SM 5186. For transmission work, the Spicer Clark-Hurth HR Transmission Service Manual is a good companion.

Hydraulic System: Pressure Checks and Pump Overhaul

Groups 29 and 30 dive into the main hydraulic system. Group 29 has specifications, fluids and filters, troubleshooting, pressure checks and adjustments, and the main hydraulic pump overhaul. Group 30 gives you the hydraulic system schematic and the control valve removal and overhaul. If you’re rebuilding the pump on an EPX16-20s, you need the clearances on page 29-5-1. I keep a copy of this manual on my bench because aftermarket hydraulic schematics often label ports wrong. For background on fundamental drivetrain concepts, reference Manual Transmission or Manual Transmission – but for these trucks, rely on the factory data.

FAQ

Does this manual cover all three models?

Yes, SM-715, TMX12-25, and EPX16-20s.

What about wiring diagrams?

Group 13 has schematic electric circuit diagrams for each model. The manual includes color codes and connector pinouts. I’ve used it to trace a failed sensor on a TMX12-25. Without the factory diagram, you’d be guessing which wire goes where. The wiring section alone spans over 50 pages in this manual.

If you’re serious about keeping these lift trucks running without chasing your tail, get the factory documentation. Access the Factory Manual.