Description

Clark-hurth TMG 12, TMG 25, TMG13, TMG20x, EPG 15-18 2002 Service Manual

If you’re turning wrenches on a Clark-hurth TMG 12, TMG 25, TMG13, TMG20x, EPG 15-18 2002 Service Manual and you don’t have the factory book in your hands, you’re working blind. I’ve seen too many guys guess on torque values for a TMG 25 and end up with a stripped motor mount or a controller that cooks itself. This 576-page book from Clark-hurth gives you the actual sequence of operations for the CTS450 transistor motor controller, the correct battery handling procedure from section 12-01, and the exact lifting and blocking steps from SA-02. That’s not something you get from a generic PDF.

Safe Maintenance Practices: Lifting, Jacking, and Blocking (SA-02)

Section SA-02 covers raising drive wheels, chaining the upright in the raised position, and shipping tie-down instructions. If you skip this and the truck comes off the jack, you’re done. The manual lays out exactly where to place blocks and how to chain the upright. Don’t think you know it. Read it. Page numbers are marked – the revision history on page 2 tracks every change so you know the latest updates are applied.

6 Systems Covered – Battery, Wiring, Motors, Contactors, Motor Controls, and Periodic Service

You get sections 12 (Battery), 13 (Wiring, Switches, and Instruments), 16 (Electrical Motors), 17 (Electrical Contactors), 19 (Motor Controls), and PS (Periodic Service). That includes exploded views for the drive motor, lift pump motor, and steering pump motor, plus the full disassembly and assembly procedures. The wiring diagrams in section 13-01 are split by region – TMG for USA, TMG except USA, and EPG. If you’re chasing an electrical fault, those diagrams are the only ones I trust.

Periodic service intervals are clearly defined in PS-01. The Service Chart and lubrication points for both TMG and EPG15-18 are right there. Don’t rely on memory – use the chart.

Planned Maintenance Program: Following the Schedule (PS-02)

PS-02 walks you through external inspection, operational checks, internal inspection, air cleaning the truck, and minor adjustments covered by PM. Critically, it includes critical fastener torque checks. Aftermarket manuals never list these. This one does. You also get the actual PM Inspection Form in PS-03 – a blank electric truck planned maintenance report you can photocopy for your jobs. That’s a time-saver when you’re running a shop.

Does This Manual Cover the TMG13 and TMG20x Variants?

Yes. The cover lists TMG12-25, TMG13-20x, and EPG15-18. The TMG13 and TMG20x share the same drivetrain architecture. Rated capacities: TMG12-25 from 1250 to 2270 kg (about 2750 to 5000 lbs), EPG15-18 from 1500 to 1800 kg (about 3300 to 3970 lbs). All the service procedures apply across the range. The wiring diagrams have separate pages for EPG models – that’s important for the fuse box layout.

Get the Right Torque Data – Don’t Guess on Fasteners

Torquing fasteners is covered in section 13-02 (General Electrical Service Tips). The manual tells you exactly how to check power cables and torque fasteners for electrical components. For the drive motor overhaul in section 16-03, the assembly steps include fastener tightening sequences. I’ve seen what happens when you overtighten a brush holder – you crack the housing. This manual prevents that.

Source Authenticity: OEM Clark-hurth vs Third-Party Reprints

This is the original OEM manual – part number 8026067, book number SM-616, Revision 2, December 2002. Printed for CLARK dealers. The copyright page explicitly states “Intended for CLARK dealers only” and “Do not sell or distribute.” AutoRepairManuals has the largest collection of OEM shop manuals in North America. Aftermarket copies miss the revision history table and often have missing pages. I’ve compared. This one is clean.

If you need specs on older or related models, check the Spicer Clark-hurth HR Service Manual – Factory Specs for Heavy-Duty Transmission and the Clark-hurth 55A SERIES II Service Manual – 136 Pages of Factory Specs. For the TMX series, see the Clark-hurth SM-715, TMX12-25, EPX16-20s 2007 Service Manual – 502 Page OEM Facto.

When diagnosing drivetrain issues, understanding basic Manual Transmission principles helps, though this manual focuses on electric drive. For more background on gearbox theory, check Manual Transmission resources.

Frequently Asked Questions

Can I use this manual for the EPG 15-18?

Yes.

Why should I trust the torque specs in this manual over a generic online forum?

Because these specs come directly from Clark-hurth’s engineering team. The revision history on page 2 tracks every change – they flag pages to add, replace, or delete. I’ve used these numbers on dozens of jobs; they prevent leaks and broken bolts. Generic forums don’t account for fastener grade or thread condition. This manual also gives you the correct tightening sequence for motor assembly, which is critical for brush alignment and commutator life. If you want to avoid come-backs, use factory data.

If you’re serious about keeping these trucks running without come-backs, access the factory manual from AutoRepairManuals. You get the full 576 pages, searchable PDF, and the confidence that every spec matches what Clark-hurth shipped to its dealers.