Description

Liebherr LTM 1090-4.1 Operators Manual – 1232 Pages of Factory Specs

You’re running a 100-ton mobile crane on a tight jobsite. The load is 40 tons at 30 feet radius. The ground is uneven. You need the exact outrigger reaction force and the maximum allowable slope. Guessing kills people. That’s why Liebherr packed 1232 pages into this Liebherr LTM 1090-4.1 Operators Manual. It’s the only document that tells you, in black and white, what the factory expects. Not aftermarket translation. Not a condensed version. The original OEM binder from Ehingen.

Page 2 of the preface states: “This crane has been designed according to the latest developments in technology and current safety regulations.” It then lists the on-board recording device that logs load, boom angle, and every override activation. If you’re not reading this manual, you’re operating blind. Period.

Why This 1232-Page Manual Belongs on the Workbench

Most crane manuals stop at a basic load chart and a few warnings. This one runs through 25 subsections of Consignes de sécurité générales (Section 2.04). That’s your safety checklist for traffic, setup, outrigger placement, working near excavations, multiple-crane lifts, lightning, welding on the load, even air traffic hazards. Each subsection has a figure reference. For example, subsection 2.04.5 shows three figures for choosing the crane location relative to slopes and excavations. You don’t guess the angle – you measure it. The manual gives the allowable ground pressure, the outrigger pad dimensions, and the blocking sequence. That’s the difference between a safe lift and a rollover.

The LICCON control system gets its own chapter (Section 4.02). Ten programs: equipment setup, crane operation, telescoping, control parameters, work area limitation, outrigger setup, engine control, and standby mode. The factory procedure for activating the LICCON and running the “Montage d’équipement” program is on page 87 – you won’t find that in a third-party summary.

Safety Systems: What Section 2.04 Covers in Exact Detail

Section 2.04 is 25 subsections long. Run through the list: traffic rules, startup checks, planning, general safety (emergency exits, ladder rules, operator obligations, site selection, slopes, ground pressure, outrigger blocking, safety verification, load handling, personnel lifting, grounding, lightning, welding on load, external power supply, air traffic hazard, multiple-crane lifts, work near transmitters, hand signals, wind effects, operational interruptions, shutdown, machine reversal, vehicle parking). Each one has a warning level – DANGER, WARNING, CAUTION, NOTICE – as defined on page 3 of the manual. That page shows the exact symbol and word association. You need to know the difference between “AVERTISSEMENT” (possible death or serious injury) and “ATTENTION” (property damage). The manual spells it out.

If you’re lifting personnel (subsection 2.04.11), the manual requires a specific safety cage and a second independent braking system. No generic “use a man basket” advice. The factory says what type, what attachment points, and what inspection criteria.

LICCON Control System: Factory Procedure for Setup and Operation

The LICCON is the brain of the LTM 1090-4.1. Section 4.02 gives you the full menu tree. You get the sequence for starting the LICCON after the engine is running, the screen navigation, and the parameters for each program. The “Limitation de la zone de travail” program (Subsection 4.02.8) lets you restrict the working area by angle and radius – essential when you’re working near power lines or buildings. The manual shows how to enter the limits, what the display shows, and how to override the limitation (with the shunt device, which is recorded in the data logger). That last point is important: any override is logged. The manual explains the legal implications. You don’t get that from a photocopied quick guide.

Torque Specs and Fluid Capacities – Where to Find Them

Section 1.03, “Caractéristiques techniques,” contains the dimensions, axle loads, tire specifications, weight distribution, noise levels, cable data, and lifting heights. The torque values for the wheel lug nuts are given in the chassis section (Section 3.00). The outrigger cylinder torque specs are in the blocking procedure. You have to dig – but they’re there. The manual is not a repair manual; it’s an operators manual. So you get the control procedures, not the disassembly steps. But the tightening torques for the outrigger jacks and the boom pivot pins are included because they affect safety. Check the subsection “Vérification des mesures de sécurité” (2.04.9) – it lists the daily inspection items and the torque check for the outrigger locking bolts.

Who Needs This Manual – Fleet Manager or One-Man Operation?

If you own or operate a Liebherr LTM 1090-4.1, you need this manual. Period. The fleet manager needs it for training, for the safety documentation, and for the data logger access instructions. The owner-operator needs it for the pre-start checks, the outrigger blocking sequence, and the wind speed limits. The manual is in French – the original factory language. The diagrams are universal. The numbers are metric. But the safety symbols are international. If you’re in North America, you’ll work through the French with the help of the diagrams. Or you can use the LIEBHERR LTM 1090-4.1 Technical Data sheet for the specs in English. For deeper diagnostics, pair it with the Liebherr LTM 1090-4.1 2010 Diagnostics Manual – Factory Error Code Guide for the LICCON fault codes. For smaller lifts, the Liebherr RL 44 2010 Operators Manual – Factory Specs for Heavy Equipment covers a similar system.

Source Authenticity: OEM vs Aftermarket

I’ve seen aftermarket crane manuals. They’re missing pages, they have blurry load charts, and they translate “calage” as “wedging” instead of “outrigger blocking.” The Liebherr factory manual is the source. The OCR excerpt from page 2 shows the actual warning language: “DANGER … AVERTISSEMENT … PRUDENCE … ATTENTION.” That’s the exact wording used in the crane cab. If you’re training a new operator, you want them reading the same words that appear on the decals. This manual is a direct scan of the original binder. No condensation, no omission. 1232 pages of substance.

For transmission-related basics, the Manual Transmission page on Wikipedia can help you understand the gearbox theory, but for the ZF transmission in this crane, stick to the factory data. The same applies to the Manual Transmission section of the crane’s drivetrain – the factory manual gives the shift points and the torque converter lockup speeds.

Related Manuals

• LIEBHERR LTM 1090-4.1 Technical Data
• Liebherr LTM 1090-4.1 2010 Diagnostics Manual – Factory Error Code Guide
• Liebherr RL 44 2010 Operators Manual – Factory Specs for Heavy Equipment

FAQ – Liebherr LTM 1090-4.1 Operators Manual

Is this manual in English?

No. It is the original French-language factory manual from Liebherr-Werk Ehingen. The diagrams are universal, and the load charts use metric units. The safety symbols are ISO-standard.

Does this manual include repair procedures?

No. This is an operators manual: setup, controls, safety, and daily operation. For repairs, you need the shop manual.

How many pages is the manual?

1232 pages, covering every section from crane description to LICCON programs and safety procedures.

Can I print this PDF?

Yes. The PDF is fully printable, but check the file size – it’s large. We recommend printing in sections as needed.

You’ve got a 100-ton crane. You’ve got a crew. You’ve got a schedule. Don’t fly blind. Access the Factory Manual and keep it in the cab. The life you save might be your own.