The Liebherr LTM 1100-5.2 Mobile Crane is a workhorse for taxi jobs, plant work, and tight-site lifts, so knowing exactly where each component sits saves time and call-outs. The Technical Information & BMK Components Manual for SN 092903 is what your techs reach for when a fault code points to “K15” and they need to find that relay on the actual crane. Component identification matters because every extra 30 minutes hunting for a valve, sensor, or plug is 30 minutes that crane isn’t earning.

What this manual helps you do

• Identify which physical component matches a reference like E1, K3, V12, or X45 from your wiring or hydraulic diagrams.
• Locate sensors, valves, relays, control units, and connectors on the carrier and superstructure using clear layout drawings.
• Trace harness runs and component groups around the chassis, outriggers, upper structure, and boom to plan access and downtime.
• Cross-reference Liebherr naming and BMK IDs with your service manuals, diagnostic laptop, and fault code readouts.
• Pinpoint the right component fast so you can decide whether to repair now, schedule it, or pre-order parts for the next service window.

Who this is for

This BMK / component identification manual is aimed at workshop technicians, field service techs, electrical diagnostic engineers, fleet mechanics, and training instructors. If you need step‑by‑step repairs, torque specs, or orderable part numbers, you’re looking for a service manual or parts catalogue instead.

FAQ

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

A: Yes, these manuals are typically delivered as a readable, zoomable PDF where you can search by component ID or term.

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

A: It covers both carrier and superstructure BMK layouts for the LTM 1100-5.2 in one document.

Q: Does it tie in with other Liebherr documents?

A: Yes, it’s designed to match BMK IDs used in Liebherr wiring diagrams, service manuals, and parts catalogues so everything lines up.

Bottom line: If your main need is component identification and location on the Liebherr LTM 1100-5.2, this BMK manual is exactly what you want; if you’re after repair steps or parts numbers, it’s not the right book.

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
Bluetooth Basic unit – BTB, Bluetooth terminal – BTT…………………………….14
Control elements centre console…………………………………………………………15
Centre 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
►►Pneumatic system:……………………………………………………………………….24
Air compressor and air dryer………………………………………………………………24
Pressure reservoir…………………………………………………………………………….25
Pneumatic valves in the driver cab………………………………………………………26
Brake relay- / overload protection valve……………………………………………….27
Pressure sensors and pressure switches……………………………………………..28
Solenoid valve for auxiliary users………………………………………………………..29
Overflow valve, metering points………………………………………………………….30
Overview disk brake system……………………………………………………………….31
Overview brake pad monitoring…………………………………………………………..32
Brake pad monitoring indicator……………………………………………………………33
ABV – control valve……………………………………………………………………………34
ABV – wheel speed sensors……………………………………………………………….35
►►Drive assembly…………………………………………………………………………….36
Installation with diesel engine D946 A7 stage IV SCR……………………………36
Installation with diesel engine D946 A7 stage IIIA Power Band H
(derivate, without SCR-device)……………………………………………………………37
Overview engine and shift gearbox……………………………………………………..38
►►Diesel engine D946 A7- 04 / D946 A7- 03 Power Band H (Derivate)….39
Engine control unit…………………………………………………………………………….39
Overview injection side………………………………………………………………………40
Fuel pumps………………………………………………………………………………………41
Fuel low pressure sensors…………………………………………………………………42
Liebherr Daisy-Chain diesel injection system………………………………………..43
Injectors LCR-I S2…………………………………………………………………………….44
Copyright by
liebherr
LTM 1100-5.2 092850 (KD-series 1008) UW-02 • BMK – Component overview 2 of 112
Service Department-Technical Documentation LWE
Originator: lweeng1 / Issue: 14.03.2016
* Customer‘s spec.
Note
All stated pressures meet the values of March 2015!
Type plates:……………………………………………………………………………………..44
Overview exhaust side……………………………………………………………………..45
Charge air sensors and preheating……………………………………………………..46
Exhaust gas flap……………………………………………………………………………….47
Exhaust gas turbo charger with wastegate…………………………………………..48
Overview flywheel side and generator…………………………………………………49
Speed sensors…………………………………………………………………………………50
Overview fan side……………………………………………………………………………..51
Coolant, temperature sensor coolant and ambient temperature………………52
Oil circuit………………………………………………………………………………………….53
Terminal resistor CAN-LIDEC (ECU-CAN2)………………………………………….54
Terminal resistor engine-CAN (ECU-CAN2)………………………………………….55
Air flap on air filter unit*……………………………………………………………………..56
►►Diesel engine D946 A7 – 03 Power Band H (Derivate)……………………..56
Air filter unit – vacuum sensor……………………………………………………………..56
External exhaust gas return eAGR………………………………………………………57
Intercooler temperature sensor…………………………………………………………..58
►►Exhaust gas aftertreatment SCR…………………………………………………..59
Overview exhaust gas system…………………………………………………………….59
Urea tank and tank sensor…………………………………………………………………60
Pump module and AdBlue-lines………………………………………………………….61
AdBlue-injector and upstream-sensors………………………………………………..62
Downstream sensors…………………………………………………………………………63
Ambient air- sensor and exhaust gas flap…………………………………………….64
►►Diesel fuel system………………………………………………………………………..65
Prefilter unit and tank………………………………………………………………………..65
►►Cooling system…………………………………………………………………………….66
►►Automated shift gearbox ZF 12 AS 2531 SO (with intarder):…………..67
Clutche and gearbox actuator…………………………………………………………….67
Intarder……………………………………………………………………………………………68
►►Hydraulic:…………………………………………………………………………………….69
Temperature sensor hydraulic oil, hydraulic oil tank……………………………….69
Hydraulic pumps – overview……………………………………………………………….70
►►Drive train:…………………………………………………………………………………..71
Overview, shifting conditions………………………………………………………………71
Distribution gearbox Kessler VG 2700 (two stage)………………………………..72
Switch schematic………………………………………………………………………………73
Transversal differential lock axle 1 (drive 10 x 8)…………………………………..73
Activation axle 1 (in axle 2 at drive 10 x 8),
transversal differential lock axle 2……………………………………………………….74
Long. and transv. differential lock axle 4 and 5……………………………………..75
►►Steering:………………………………………………………………………………………76
Steering from superstructure………………………………………………………………76
Steering gear ZF-SERVOCOM………………………………………………………….77
Oil supply steering circuit 1, deficiency monitoring…………………………………78
Oil supply steering circuit 2………………………………………………………………..79
►►Active rear axle steering:………………………………………………………………80
CAN-valves axle 3, 4 and 5 (HAWE) …………………………………………………..80
Valve block………………………………………………………………………………………81
Valve block, metering connection MP6…………………………………………………82
Angle sensor……………………………………………………………………………………83
Steering- and centering cylinder, safety valves……………………………………..84
►►Support:………………………………………………………………………………………85
Inclination sensor……………………………………………………………………………..85
Support valves – right………………………………………………………………………..86
Support valves – left…………………………………………………………………………..87
Sliding beam sliding beam…………………………………………………………………88
Support cylinder……………………………………………………………………………….89

Sliding beam monitoring with laser length sensor (until 092863)……………..90
Sliding beam monitoring with rope length sensor (from 092864)……………..91
Supporting force sensor – plug connections………………………………………….92
Supporting pressure sensor – plug connections…………………………………….93
►►Axle suspension:………………………………………………………………………….94
Level sensor- axle suspension……………………………………………………………94
Valve block – axle suspension right……………………………………………………..95
Valve block – axle suspension left………………………………………………………..96
►►Special equipment*:……………………………………………………………………..97
Switch over diaphragm reservoir front………………………………………………….97
Switch over diaphragm reservoir rear………………………………………………….98
Ballast depending brake force reduction axle 1 and 2, activation…………….99
Ballast depending brake force reduction axle 3 – 5………………………………100
Eddy currant brake Telma Focal 2200………………………………………………..101
Air condition……………………………………………………………………………………102
Additional heating Thermo PRO 90……………………………………………………103
Additional heating Air Top 2000 ST……………………………………………………104
External power supply……………………………………………………………………..105
Back-up camera……………………………………………………………………………..106
Trailer coupling……………………………………………………………………………….107
Battery charger……………………………………………………………………………….108
Hydraulic emergency control…………………………………………………………….109
►► Index…………………………………………………………………………………………. 110

►►Crane cab:……………………………………………………………………………………….. 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 – activation, temperature sensors………………………………………….. 10
►►Crane electric:………………………………………………………………………………..15
Battery box…………………………………………………………………………………….15
►►Switch cabinet:……………………………………………………………………………….16
Fuses, power supply boards LSB, voltage converter……………………………16
Relays, resistor modules………………………………………………………………….17
Universal in/output module UEA, data logger 2, GSM module……………… 18
Diagnosis plug………………………………………………………………………………..19
Plug plate slewing platform………………………………………………………………20
Plug plate cab…………………………………………………………………………………21
EMERGENCY OPERATION – XNOT – plug………………………………………..22
EMERGENCY OPERATION – resistors…………………………………………….. 23
►►Central greasing device:………………………………………………………………….24
Electric pump, grease cycle monitoring……………………………………………… 24
►►Overview drive assembly:……………………………………………………………….25
Installation view………………………………………………………………………………25
►►Diesel engine D944 A7 – 04 / D944 A7 – 03 Power Band H (Derivate):… 26
Engine control unit…………………………………………………………………………..26
Overview injection side…………………………………………………………………….27
Fuel pumps…………………………………………………………………………………….28
Fuel low pressure sensors……………………………………………………………….29
Liebherr Daisy-Chain diesel injection system………………………………………30
Injectors LCR-I S2…………………………………………………………………………..31
Type plates…………………………………………………………………………………….31
Overview exhaust side……………………………………………………………………32
Charge air sensors and preheating…………………………………………………… 33
Exhaust gas flap……………………………………………………………………………..34
Exhaust gas turbo charger with wastegate………………………………………… 35
Overview flywheel side and generator………………………………………………. 36
Speed sensors……………………………………………………………………………….37
Overview fan side……………………………………………………………………………38
Coolant, temperature sensor coolant………………………………………………… 39
Oil circuit………………………………………………………………………………………..40
Terminal resistor CAN-LIDEC (ECU-CAN2)………………………………………..41
Terminal resistor engine-CAN (ECU-CAN2)………………………………………..42
▪▪Only Power Band H-engines………………………………………………………….43
External exhaust gas return eAGR……………………………………………………. 43
Intercooler temperature sensor…………………………………………………………44
Originator: lweeng1; lweegm0 / Issue: 08.12.2016
Copyright by
Liebherr
LTM 1100-5.2 092850 (KD-series 1008) OW-02 • BMK – Component overview 2 of 94
Service Department-Technical Documentation LWE
Originator: lweeng1; lweegm0 / Issue: 08.12.2016
* Customer‘s spec.
Note:
All stated pressures meet the values of October 2014!
►►Exhaust after treatment SCR:………………………………………………………….45
Overview exhaust gas system…………………………………………………………..45
Urea tank and tank sensor……………………………………………………………….46
Pump module and AdBlue-lines………………………………………………………..47
AdBlue-injector and upstream-sensors/downstream-sensors……………….. 48
Control units NOx-sensors/NH3-sensor…………………………………………….. 49
Ambient air and exhaust gas flap……………………………………………………… 50
►►Air filter unit:………………………………………………………………………………….. 51
Air filter vacuum, air flap in suction air*……………………………………………… 51
►►Fuel system:………………………………………………………………………………….. 52
Fuel tank and tank sensor………………………………………………………………..52
Fuel delivery, fuel prefilter unit…………………………………………………………..53
►►Cooling system:……………………………………………………………………………..54
Cooler – fan drive…………………………………………………………………………….54
Coolant level sensor………………………………………………………………………..55
►►Pneumatic system:………………………………………………………………………….56
Air pressure compressor, cooler air-air……………………………………………… 56
►►Crane hydraulic:……………………………………………………………………………..57
Overview hydraulic components……………………………………………………….57
Overview hydraulic pumps……………………………………………………………….58
Oil cooler and temperature sensor hydraulic oil ………………………………….59
Pressure sensors, overview metering connection plate……………………….. 60
Main control block (LS)…………………………………………………………………….61
Pressure stages / telescoping…………………………………………………………..62
Hoist gear 1……………………………………………………………………………………63
Hoist gear 2*…………………………………………………………………………………..64
Luffing, activation lowering brake………………………………………………………65
Luffing……………………………………………………………………………………………66
Luffing, boom steep…………………………………………………………………………67
Slewing gear – activation………………………………………………………………….68
Slewing gear – slewing angle display………………………………………………… 69
Boom direction……………………………………………………………………………….70
Auxiliary consumer valves………………………………………………………………..71
Locking slewing platform………………………………………………………………….72
Ballasting……………………………………………………………………………………….73
Telescoping cylinder – pretension……………………………………………………… 74
Tilting cab………………………………………………………………………………………75
►►Telescoping boom:………………………………………………………………………….75
▪▪Electric…………………………………………………………………………………………75
Cable drums and length sensors……………………………………………………….75
Cable drums and length sensors……………………………………………………….76
Boom head, boom nose…………………………………………………………………..77
▪▪Telematic………………………………………………………………………………………78
Position sensor……………………………………………………………………………….78
Tele section pinning…………………………………………………………………………79
Gripper pinning, position sensor………………………………………………………..80
Pressure supply unpinning……………………………………………………………….81
Emergency operation tele , gripper pinning…………………………………………82
►►Additional equipment double swing-away jib*:…………………………………83
Activation luffing at hydraulic double swing-away jib…………………………….83
Hydraulic components of the transport device…………………………………….84
Hydraulic components, angle sensor………………………………………………… 85
Hoist limit switch at single and double swing-away jib………………………….86
►►Special equipment*:………………………………………………………………………..87
Additional heating Thermo Pro 90*…………………………………………………… 87
Air condition*………………………………………………………………………………….88
Removable boom and luffing cylinder*………………………………………………. 89
Emergency control crane hydraulic*………………………………………………….. 90
Dolly operation* (dolly for boom transport USA)………………………………….91
►► Index……………………………………………………………………………………………… 92

Liebherr Crane