Description

Bomag MPH 122-2 2011 Training Manual

You’ve got a Bomag MPH 122-2 on your bay, serial number 101 590 06 or 07, and you’re staring at a partial aftermarket PDF that says “tighten to spec” but doesn’t give a number. That’s not a manual, that’s a paperweight. This 2011 Training Manual is the real deal — 658 pages of factory-authorized procedure, straight from Bomag GmbH, printed in Germany. I’ve been wrenching for 28 years and I’ve seen what happens when a tech guesses on a rotor pump charge pressure switch or misreads a wiring diagram on page 58. Expensive smoke. This manual stops that.

Section 1.4 on page 26 gives you the exact tightening torques for every fastener on the MPH 122-2 — not a generic range, but the actual ft-lbs Bomag expects. No conversion tables from Nm unless you need them. If you’re rebuilding the TCD 2015 V6 diesel engine (chapter 9), you want those numbers bolted into your head before you touch a ratchet. The same goes for the hydraulic and electrical systems: the manual lays out disassembly, assembly, and installation for every component, plus the required tool lists. Safety regulations are called out on page 9, and they’re not suggestions — they’re part of the repair sequence.

Tightening Torques – Page 26 Factory Specs

Page 26 is where you live if you do any bolt-on work. Bomag lists torque values for the stabilizer/recycler rotor mounts, hydraulic flanges, and engine fasteners. I’ve torqued a lot of bolts, and I’ll tell you straight: the difference between 45 ft-lbs and 55 ft-lbs on a rotor housing can mean a leak that costs you a shift. This manual gives you the number. It also includes the note about using only genuine Bomag spare parts — that’s not a sales pitch, it’s because aftermarket bearings and seals don’t match the interference fit tolerances. You’ll find that warning repeated in the spare parts catalogue reference BOMAG MPH 122-2 2013 Parts Catalog if you need to cross-reference part numbers.

Wiring Diagrams – Understanding Page 58

Chapter 5 starts on page 57 with understanding wiring diagrams, and page 58 breaks down circuit symbols. If you’ve ever chased a ghost fault in the ESX control unit (section 6.21), you know the value of a factory electrical schematic. Aftermarket diagrams often omit the identification of switch blocks on page 71 or the pin assignments for the EMR3 engine control unit (page 204). This manual includes all of that — batteries, jump-start procedure, magnetic sensors, pressure switches, and the entire diagnostics concept starting on page 117. The wiring diagram alone is worth the price.

7 Systems Covered – From Engine to Electrics

The table of contents shows seven major systems: General (safety, torques, repair instructions), Bomag Stabilizer/Recycler mechanicals, Technical Data, Maintenance (fuels, lubricants, intervals), Wiring Diagrams, Electrics (sensors, control units, fuses), and Electronic Control (training, diagnostics). Each section is dense with procedures — not philosophy. For example, section 8.8 lists the EMR3 fault codes, and section 9.3 covers the lubrication oil circuit for the TCD 2015. If you need to diagnose a flashing code on the engine ECU, you go to page 210 and follow the flashing code table. No guesswork.

Are Aftermarket Manuals Good Enough?

Aftermarket manuals reuse generic torque tables and skip the serial-number-specific wiring differences. For the MPH 122-2, serial numbers 101 590 06 and 07 have different hydraulic configurations. The OEM factory manual gives you the exact pinouts and pressure switch locations for your machine. If you rely on a third-party PDF, you risk cross-threading a charge pressure sensor or miswiring the travel control transducer. I’ve seen it happen. That’s why this site sells only OEM-original documentation — like the related Bomag BC 670 RB Training Manual – Factory Specs & Repair Docs and Bomag BW 24 R 2001 Training Manual – Factory Specs & Repair — all factory prints, no reprints or copies.

You’ll also find references to external resources for understanding basic transmissions, but this manual has its own transmission section and the Manual Transmission diagrams inside. Another external source Manual Transmission covers general theory, but for the Bomag you stick with the factory book. The manual even warns that repair instructions are not subject to an updating service — you get the bulletins as they released them.

ESX Override: When the Control Unit Locks You Out

Section 6.21 describes the override function for the ESX-control. If the electronic control unit (ECU) throws a fault and locks out the stabilizer rotor, you need the specific override procedure to get the machine moving for diagnosis. The manual gives you the steps — not a workaround, but the factory-authorized method. This is the kind of detail that separates a real training manual from a quick-reference card.

Do I have to use genuine Bomag parts, or can I use aftermarket?

Yes. The manual states use only genuine BOMAG spare parts. For every repair, refer to the spare parts catalogue.

What diagnostics tools does this manual cover?

Section 8.5 covers diagnosis with SERDIA (the Bomag diagnostic software), section 8.6 covers CAN-bus diagnostics, and section 8.7 lists the diagnostics interface. The EMR3 fault code list on page 220 is 70 pages of codes with troubleshooting steps. You’ll also find the flashing code procedure on page 212 for engine control unit errors. For the ESX control, the override procedure on page 120 lets you bypass certain faults temporarily to move the machine — but only after confirming the safety regulations on page 9. This manual treats diagnostics as a sequence, not a guessing game.

If you maintain or repair a Bomag MPH 122-2, you need the factory training manual. 658 pages of torque specs, wiring schematics, disassembly sequences, and fault code tables — all from Bomag’s 2011 release. Access the Factory Manual now and put the right procedure on your bench.