The Liebherr LTM 1110-5.1 Mobile Crane is a serious all‑terrain machine, and when it’s down on a remote site, every minute costs money. The BMK / Technical Information manual is what techs grab when they’re trying to match what they see on the crane to what’s on the schematics. Component identification is what lets you walk up to the carrier or superstructure, multimeter in hand, and know you’re on the right valve block, relay, or sensor the first time. The BMK for SN 043343 is aimed squarely at that job.

What this manual helps you do

• Identify which physical component matches a schematic tag like K15, E1, or X45 on the LTM 1110-5.1.
• Locate electrical boxes, sensors, valves, and controllers on both carrier and superstructure using outline and layout views.
• Trace reference designators from wiring or hydraulic diagrams to their actual mounting points on the crane.
• Cross-reference Liebherr component IDs to where they appear in other technical documents for the same machine.
• Pinpoint components during fault-finding so you’re not guessing which box or valve bank to open in the field.

Who this is for

This BMK / component identification manual is for workshop technicians, field service techs, electrical diagnostic engineers, fleet mechanics, and training instructors. If you need repair procedures, torque specs, or parts ordering numbers, you’re looking for a service manual or parts catalogue instead, not this.

FAQ

Q: Are the diagrams clear and searchable in the PDF?

A: Yes, these BMK PDFs are usually clean scans or native files with readable component labels and can typically be searched by ID or text.

Q: Does this cover just the upper or the whole crane?

A: This manual covers component identification for both carrier and superstructure in one package.

Q: Does it tie in with other Liebherr documents?

A: Yes, the BMK is meant to be used alongside Liebherr wiring diagrams, hydraulic schematics, service manuals, and parts catalogues by sharing the same reference designators.

Bottom line: If your main need is component identification and location on the Liebherr LTM 1110-5.1, this is the right manual. If you want step‑by‑step repairs or part numbers, this is not what you need.

Table of Contents:

► Chassis:………………………………………………………………………………………..5
Lighting front and mirrors…………………………………………………………………….5
Lighting rear………………………………………………………………………………………6
Side marker lights right………………………………………………………………………..7
Side marker lights left………………………………………………………………………….8
Sockets, warning signal sensor…………………………………………………………….9
► Driver cab:……………………………………………………………………………………10
Doors and windows, interior lighting…………………………………………………….10
Ventilation and heat exchanger………………………………………………………….. 11
Screen wiper and washer………………………………………………………………….. 11
Ventilation and heat exchanger…………………………………………………………..12
Control elements………………………………………………………………………………13
Remote control module BTT……………………………………………………………….14
Basic unit BTB………………………………………………………………………………….14
Control elements centre console…………………………………………………………15
Center console – I/O modules, BTB……………………………………………………..16
Centre console – batteries, battery main switch,
Fuses battery box……………………………………………………………………………..17
Centre console – fuses………………………………………………………………………18
Centre console – relay……………………………………………………………………….19
Centre console – voltage converter……………………………………………………..20
Centre console – control unit intarder, components………………………………..21
Centre console – fan, component carrier, emergency STOP……………………22
Centre console – diagnosis plug………………………………………………………….23
Telemetry FMS-interface……………………………………………………………………24
► Pneumatic system:……………………………………………………………………….25
Air compressor and air dryer………………………………………………………………25
Pressure reservoir…………………………………………………………………………….26
Pneumatic valves in the driver cab………………………………………………………27
Brake relay- / overload protection valve……………………………………………….28
Pressure sensors and pressure switches……………………………………………..29
Solenoid valve for auxiliary users………………………………………………………..30
Filter and overflow valve, measuring points compressed air circuits………..31
Overview disk brake system……………………………………………………………….32
Overview brake pad monitoring…………………………………………………………..33
Brake pad monitoring indicator……………………………………………………………34
ABV – regulating valves……………………………………………………………………..35
ABV- Hill start assist………………………………………………………………………….36
ABV – wheel speed sensors……………………………………………………………….37
► Drive assembly…………………………………………………………………………….38
Installation with diesel engine D946 A7- 05…………………………………………..38
Installation with Diesel engine D946 A7 – 03/ D946 A7 – 04…………………….39
Drive assembly…………………………………………………………………………………40
Copyright by
liebherr
LTM 1110-5.1 043250 (KD-series 1000) UW-02 • BMK – Component overview 2 of 120
LWE – Customer Service – Documentation
Author: lweeng1 / Issue: 17.01.2020
* Customer‘s spec.
Note
All stated pressures meet the values of May 2019!
► Diesel engine D946 A7-03 / D946 A7-04 / D946 A7-05……………………..41
Engine control unit…………………………………………………………………………….41
Overview injection side………………………………………………………………………42
Fuel pumps………………………………………………………………………………………43
Fuel low pressure sensors…………………………………………………………………44
Liebherr Daisy-Chain diesel injection system………………………………………..45
Injectors LCR-I S2…………………………………………………………………………….46
Type plates:……………………………………………………………………………………..46
Overview exhaust side………………………………………………………………………47
Charge air sensors and -preheating…………………………………………………….48
Exhaust gas flap……………………………………………………………………………….49
Exhaust gas turbo charger with wastegate…………………………………………..50
Overview flywheel side and generator…………………………………………………51
Speed sensors…………………………………………………………………………………52
Overview fan side……………………………………………………………………………..53
Oil circuit………………………………………………………………………………………….55
Terminal resistor CAN-LIDEC (ECU-CAN2)………………………………………….56
Terminal resistor engine-CAN (ECU-CAN2)………………………………………….57
Intercooler temperature sensor…………………………………………………………..59
► Exhaust gas system……………………………………………………………………..60
Exhaust after treatment SCRonly………………………………………………………..60
Overview…………………………………………………………………………………………60
AdBlue-injector and upstream-sensors………………………………………………..61
Downstream sensors…………………………………………………………………………62
Exhaust after treatment SCRF……………………………………………………………63
Overview…………………………………………………………………………………………63
AdBlue-injector and upstream-sensors………………………………………………..64
Downstream sensors…………………………………………………………………………65
Exhaust after treatment SCRonly / SCRF…………………………………………….66
Urea tank and tank sensor…………………………………………………………………66
Pump module and AdBlue-lines………………………………………………………….67
► Air filter system……………………………………………………………………………68
Air pressure sensor…………………………………………………………………………..68
Air filter unit with air flap…………………………………………………………………….69
► Diesel fuel system………………………………………………………………………..70
Prefilter unit and tank………………………………………………………………………..70
► Cooling system…………………………………………………………………………….71
► ZF shift gearbox Traxon 12 TX 2611 SO:………………………………………..72
Gearbox control………………………………………………………………………………..72
Intarder……………………………………………………………………………………………73
► Hydraulic:…………………………………………………………………………………….74
Temperature sensor hydraulic oil, hydraulic oil tank……………………………….74
Hydraulic pumps – overview……………………………………………………………….75
Pressure supply hydraulic………………………………………………………………….76
► Drive train:…………………………………………………………………………………..77
Overview, shifting conditions………………………………………………………………77
Distribution gearbox Kessler VG 2700 (two stage)………………………………..78
Road/off-road switchover……………………………………………………………………79
Switch over travel drive / crane drive (PTO)………………………………………….80
Crane drive………………………………………………………………………………………81
Crane drive – angle gear box………………………………………………………………82
Transversal differential lock axle 1 (drive 10 x 8)…………………………………..83
Longitudinal differential lock distribution gear………………………………………..83
Activation axle 1 (in axle 2 at drive 10 x 8), transversal differential lock axle 2….. 84
Long. and transv. differential lock axle 4 and 5……………………………………..85
► Steering:………………………………………………………………………………………86
Steering from superstructure………………………………………………………………86
Steering gear ZF-SERVOCOM………………………………………………………….87
Oil supply steering circuit 1, deficiency monitoring…………………………………88
Oil supply steering circuit 2………………………………………………………………..89

► Active rear axle steering:………………………………………………………………90
CAN-valves axle 3, 4 and 5 (HAWE) …………………………………………………..90
Valve block………………………………………………………………………………………91
Valve block ……………………………………………………………………………………..92
Oil filter……………………………………………………………………………………………93
Angle sensor……………………………………………………………………………………94
Steering- and centering cylinder, safety valves……………………………………..95
► Support:………………………………………………………………………………………96
Inclination sensor……………………………………………………………………………..96
Support valves – right………………………………………………………………………..97
Support valves – left…………………………………………………………………………..98
VarioBase – sliding beam monitoring……………………………………………………99
VarioBase – monitoring…………………………………………………………………….100
Extension cylinder sliding beam………………………………………………………..101
Support cylinder……………………………………………………………………………..101
► Axle suspension:………………………………………………………………………..102
Level sensor- axle suspension………………………………………………………….102
Valve block – axle suspension right……………………………………………………103
Valve block – axle suspension left………………………………………………………104
► Special equipment*:……………………………………………………………………105
Switch over diaphragm reservoir right………………………………………………..105
Switch over diaphragm reservoir left………………………………………………….106
Ballast depending brake force reduction axle 1 and 2, activation…………..107
Ballast depending brake force reduction axle 3 – 5………………………………108
Eddy currant brake Telma Focal 2200………………………………………………..109
Air-conditioner……………………………………………………………………………….. 110
Additional heating Thermo Pro 90………………………………………………………111
Additional heating Air Top 2000 ST…………………………………………………… 112
External power supply…………………………………………………………………….. 113
Back-up camera…………………………………………………………………………….. 114
Trailer coupling………………………………………………………………………………. 115
Battery charger………………………………………………………………………………. 116
Hydraulic emergency control……………………………………………………………. 117

► Crane cabin:…………………………………………………………………………………….. 3
▪ Control stand …………………………………………………………………………………3
LICCON-monitor, pedals……………………………………………………………………3
Active joystick (AMS1), keyboard unit (LSB TE1) right………………………….. 4
Active joystick (AMS2), keyboard unit (LSB TE2) left…………………………….5
BKE (operation and control unit)………………………………………………………… 6
▪ Cab installation……………………………………………………………………………….8
Wiper motor, washer pump………………………………………………………………..9
Heating – temperature sensors………………………………………………………….10
Heating Thermo Pro 90……………………………………………………………………12
▪ Crane electric:………………………………………………………………………………15
Flood light………………………………………………………………………………………15
Sensor…………………………………………………………………………………………..16
► Switch cabinet:……………………………………………………………………………….17
Fuses, power supply boards LSB, voltage converter……………………………17
Relays, resistor modules………………………………………………………………….18
Universal in- / output module UEA, data logger 2, remote diagnosis……… 19
Diagnosis plug………………………………………………………………………………..20
Plug plate slewing platform………………………………………………………………21
Plug plate cab…………………………………………………………………………………22
Emergency operation – XNOT-plug…………………………………………………… 23
EMERGENCY OPERATION – resistors…………………………………………….. 24
► Central greasing device:………………………………………………………………….25
Electric pump, grease cycle monitoring……………………………………………… 25
► Crane drive:…………………………………………………………………………………… 26
▪ Mechanical shaft…………………………………………………………………………..26
▪ Angle gear box……………………………………………………………………………..27
▪ Distribution gearbox……………………………………………………………………..28
► Crane hydraulic:……………………………………………………………………………..29
Overview hydraulic components right……………………………………………….. 29
Overview hydraulic components left………………………………………………….. 30
Overview hydraulic pumps……………………………………………………………….31
Oil cooler and temperature sensor hydraulic oil ………………………………….32
Main control block (LS)…………………………………………………………………….33
Pressure stages for telescoping………………………………………………………..34
Actuation slewing gear brake, luffing…………………………………………………. 35
Oil filter………………………………………………………………………………………….36
Overview metering connector plate…………………………………………………… 37
Slewing gear – activation………………………………………………………………….38
Slewing gear – slewing angle display………………………………………………… 39
Boom direction……………………………………………………………………………….40
Auxiliary consumer valves………………………………………………………………..41
Locking slewing platform………………………………………………………………….42
Hoist gear 1 and 2 winch speed sensor / connections hoist gear 2……….. 43
Hoist gear I…………………………………………………………………………………….44
Hoist gear 2*…………………………………………………………………………………..45
Luffing……………………………………………………………………………………………46
Copyright by
liebherr
LTM 1110-5.1 from 043250 (KD-series 1000) OW-02 • BMK – Component overview 2 of 70
LWE – Customer Service – Documentation
Author: lweeng1 / Issue: 02.10.2020
* Customer‘s spec.
Note:
All stated pressures according to state of January 2018!
Luffing, boom steep…………………………………………………………………………47
Ballasting right………………………………………………………………………………..48
Ballasting left………………………………………………………………………………….49
Ballast recognition…………………………………………………………………………..50
Telescoping cylinder – pretension……………………………………………………… 51
Tilting cab………………………………………………………………………………………52
► Telescoping boom:………………………………………………………………………….52
▪ Electric…………………………………………………………………………………………52
Cable drums and length sensors……………………………………………………….52
Cable drums and length sensors……………………………………………………….53
Boom head, boom nose…………………………………………………………………..54
▪ Telematic………………………………………………………………………………………55
Position sensor……………………………………………………………………………….55
Tele section pinning…………………………………………………………………………56
Gripper pinning, position sensor………………………………………………………..57
Emergency operation tele , gripper pinning…………………………………………58
Emergency operation tele , gripper pinning…………………………………………59
► Additional equipment double swing-away jib*:…………………………………60
Activation luffing at hydraulic double swing away jib…………………………….60
Hydraulic components of the transport device…………………………………….61
Hydraulic components, angle sensor………………………………………………… 62
Hoist limit switch at single and double swing-away jib………………………….63
Air condition*………………………………………………………………………………….64
Removable boom*…………………………………………………………………………..65
Emergency control crane hydraulic*………………………………………………….. 66
Dolly operation* (dolly for boom transport USA)………………………………….67
► Index……………………………………………………………………………………………… 68

Liebherr Crane