The Liebherr LTC 1050-3.1 Compact Crane spends its life in tight job sites where you can’t afford guesswork when chasing an electrical or hydraulic issue. In a real workshop, the person who grabs the BMK (Bauteilkennzeichnung) manual is usually the tech with the laptop open and the wiring diagram on screen. Component identification matters because you lose hours if you can’t match “K15” on the schematic to the real box on the machine. This Technical Information & BMK Components Manual for SN 056851 is built exactly for that job, not for repairs step‑by‑step.

What this manual helps you do

• Identify which physical component matches a schematic tag like E1, K3, V12, or X45 on the Liebherr LTC 1050-3.1 Compact Crane.
• Locate sensors, valves, relays, junction boxes, and harnesses on both carrier and superstructure using outline and layout diagrams.
• Trace wiring and hydraulic references from fault codes or diagrams to the actual mounting point on the crane.
• Cross-reference Liebherr component IDs with other documents so you know what to look for in service manuals or parts catalogues.
• Pinpoint components during technician training so new staff learn the machine layout without wandering around guessing.

Who this is for

This fits workshop technicians, field service techs, electrical diagnostic engineers, fleet mechanics, and training instructors. If you’re after repair procedures, torque specs, troubleshooting trees, or parts ordering numbers, you need the service manual and parts catalogue instead.

FAQ

Q: Is the PDF clear and searchable for daily workshop use?

A: Yes, this kind of BMK manual is normally provided as a readable PDF with clear diagrams you can zoom and search by component ID.

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

A: This Technical Information & BMK Components Manual covers both carrier and superstructure in one product.

Q: Does it tie in with other Liebherr manuals?

A: Yes, the BMK component identification links directly to IDs used in Liebherr wiring diagrams, hydraulic schematics, service manuals, and parts catalogues.

Bottom line: If you need to know “where is this component on the crane?” this is the right manual. If you need “how do I repair or adjust it?” this is not the one you want.

Table of Contents:

Chassis:…………………………………………………………………………………. 5
View from front, lighting and mirror……………………………………………… 5
View rear, lighting……………………………………………………………………… 6
Side view left, illumination………………………………………………………….. 7
Side view right, illumination……………………………………………………….. 8
Warning signal sensors, external start point, plug combination-box…. 9
Electric:………………………………………………………………………………… 10
Battery, main fuse box…………………………………………………………….. 10
CAN – Terminal resistor……………………………………………………………..11
Switch cabinet chassis:………………………………………………………… 12
Fuses……………………………………………………………………………………. 12
I/O- modules, BTB, control unit…………………………………………………. 13
Relays…………………………………………………………………………………… 14
Resistors, clamp strip……………………………………………………………… 15
Emergency operation- and diagnosis plug, telemetry…………………… 16
Plug connections……………………………………………………………………. 17
► Pneumatic system:……………………………………………………………….. 18
Compressor and dryer…………………………………………………………….. 18
Pressure sensors and valves brake system……………………………….. 19
ABV activation valve……………………………………………………………….. 20
Relay- and overload protection valve………………………………………… 21
Adjustment- and relay valve…………………………………………………….. 21
Air reservoir mounting……………………………………………………………… 22
Valve block aux. consumers…………………………………………………….. 23
Driving with radio remote control* (RemoteDrive)……………………….. 24
► Brake system:………………………………………………………………………. 25
Overview – monitoring brake pad………………………………………………. 25
Brake pad monitoring indicator…………………………………………………. 26
► Drive train:……………………………………………………………………………. 27
Overview, shifting conditions……………………………………………………. 27
► Diesel engine Cummins B6.7 , 236 kW (316 HP):…………………….. 28
Installation overview……………………………………………………………….. 28
Type plate on engine………………………………………………………………. 29
Overview fan side…………………………………………………………………… 30
Overview injection side……………………………………………………………. 31
Overview exhaust side…………………………………………………………….. 32
Top view………………………………………………………………………………… 33
Overview fly-wheel side…………………………………………………………… 34
Heating flange………………………………………………………………………… 34
Engine Control Module ECM …………………………………………………… 35
Fuel scheme ( high- and low pressure)……………………………………… 36
Common-Rail-System …………………………………………………………….. 37
Injectors………………………………………………………………………………… 38
Air-sensors…………………………………………………………………………….. 39
Copyright by
liebherr
LWE – Customer Service – Documentation
Author: lweegm0 / Issue: 17.08.2023
LTC 1050-3.1 from 056800 (KD-series 1001) UW-02 • BMK – Component overview 2 of 90
Speed sensors……………………………………………………………………….. 40
Cooling agent…………………………………………………………………………. 41
Oil circuit……………………………………………………………………………….. 42
Exhaust gas turbo charger……………………………………………………….. 43
Exhaust aftertreatment system:…………………………………………….. 44
Overview……………………………………………………………………………….. 44
Exhaust gas system – module overview…………………………………….. 45
Exhaust gas system – sensor technology…………………………………… 46
AdBlue-pump module……………………………………………………………… 47
AdBlue tank and fuel tank gauge unit ……………………………………….. 48
AdBlue tank and hose heating………………………………………………….. 49
Dosing unit AdBlue…………………………………………………………………. 50
Fuel system:…………………………………………………………………………. 51
Fuel tank and fuel filter……………………………………………………………. 51
Cooling system:……………………………………………………………………. 52
Installation overview cooler………………………………………………………. 52
Air filter system:…………………………………………………………………… 53
Air filter, pressure sensor…………………………………………………………. 53
► Power shift gearbox:…………………………………………………………….. 54
ZF 6 WG 210- Overview………………………………………………………….. 54
ZF 6 WG 210 – Transmitters and sensors…………………………………… 55
► Hydraulic:…………………………………………………………………………….. 57
Hydraulic pumps steering, fan………………………………………………….. 57
Hydraulic pumps crane hydraulic, emergency steering………………… 58
Hydraulic pump on axle 3………………………………………………………… 59
Crane hydraulic “ON”………………………………………………………………. 60
Oil tank………………………………………………………………………………….. 61
► Axles with components:……………………………………………………….. 62
ABV – inductive sensors…………………………………………………………… 62
Transversal differential locks……………………………………………………. 63
► Steering:………………………………………………………………………………. 64
Steering gear, steering circuit control………………………………………… 64
Steering decoupling………………………………………………………………… 65
Steering- and centering cylinder ………………………………………………. 66
► Active rear axle steering……………………………………………………….. 67
Centering cylinder, emergency supply……………………………………….. 67
CAN-Valve (HAWE)………………………………………………………………… 68
Control block and pressure filter……………………………………………….. 69
Control block, flow rate indicator, check valve…………………………….. 70
Monitoring centering circuit………………………………………………………. 71
Angle sensor………………………………………………………………………….. 72
Support valves for sliding beams right……………………………………….. 73
Support valves for sliding beams left…………………………………………. 74
► Support:……………………………………………………………………………….. 75
Inclination sensor …………………………………………………………………… 75
Sliding beam- hydraulic…………………………………………………………… 75
Sliding beam monitoring with rope length sensor………………………… 76
Monitoring support pressure with pressure sensor………………………. 77
► Axle suspension:………………………………………………………………….. 78
Axle suspensions valve, oil supply……………………………………………. 78
Valve block axle suspension right……………………………………………… 79
Valve block axle suspension left……………………………………………….. 80
Axle compensation axle 2………………………………………………………… 81
Level sensor axle suspension…………………………………………………… 82

Special equipment:……………………………………………………………….. 83
Eddy current brake*………………………………………………………………… 83
Back-up camera*……………………………………………………………………. 84
Air-conditioner………………………………………………………………………… 85
Engine preheatingTTP150*……………………………………………………… 86
► Index……………………………………………………………………………………. 87
► Haftungsbegrenzung / Disclaimer………………………………………….. 90

Superstructure general:………………………………………………………..3
Lighting slewing platform…………………………………………………………3
Lighting boom………………………………………………………………………..4
LMB – warning device (EN 13000)…………………………………………….5
Immobiliser*…………………………………………………………………………..6
Central greasing device…………………………………………………………..7
Ballast – overview……………………………………………………………………8
Ballast – electrically ballast monitoring……………………………………….9
Boom direction……………………………………………………………………..10
► Crane cabin:……………………………………………………………………….11
Heating – additional heating Thermo Pro 90…………………………….. 11
Heating – heating air conditioning……………………………………………12
Heating – activation, temperature sensors………………………………..13
Screen washer unit, platform cab, steering angle………………………14
Interior furnishing………………………………………………………………….15
Electric………………………………………………………………………………..16
Door contact switch………………………………………………………………17
Pneumatic – brake valve………………………………………………………..17
Controls crane cab:…………………………………………………………….18
Control elements (chassis operation)………………………………………18
Tachograph (chassis operation)………………………………………………19
Liccon – monitor, pedals, ethernet……………………………………………20
Joystick, LSB-TE1 right ………………………………………………………..21
Joystick, LSB-TE2 left……………………………………………………………22
Operation- and control unit…………………………………………………….23
BTB, remote control module – BTT………………………………………….24
Switch cabinet crane cabin:………………………………………………..25
Basis assembly – fuses, remote diagnosis………………………………..25
Basis assembly – relay, data logger…………………………………………26
► Switch cabinet slewing platform:…………………………………………27
Tilting frame – fuses………………………………………………………………27
Relay, resistor modules………………………………………………………….28
LSB-board, UEA / EA-module, resistors emergency operation……29
EMERGENCY OPERATION – XNOT-plug………………………………..30
► Pneumatic system:……………………………………………………………..31
Locking slewing platform……………………………………………………….31
► Cab arm:…………………………………………………………………………….32
Cab arm lock………………………………………………………………………..32
Monitoring cab arm locking – sensor………………………………………..33
Cab arm locking – sensors……………………………………………………..34
Cab arm luffing – sensors……………………………………………………….35
Hydraulic – activation, telescoping cylinder……………………………….36
Hydraulic – telescoping cylinder………………………………………………37
Hydraulic – luffing cylinder……………………………………………………..38
Copyright by
liebherr
LWE – Customer Service – Documentation
Author: lweegm0 / Issue: 16.06.2020
LTC 1050-3.1 from 056800 (KD-series 1001) OW-02 • BMK – Component overview 2 of 62
* = Customer‘s spec.
Note:
All stated pressures meet the values values of July 2016!
Cab arm height adjustable*:………………………………………………..39
Cab – electric………………………………………………………………………..39
Telescope arm – electric…………………………………………………………39
Cab arm – activation – hydraulic………………………………………………40
Cab arm luffing – hydraulic and sensors…………………………………..41
Emergency lowering cab – hydraulic………………………………………..42
► Crane hydraulic (chassis):…………………………………………………..43
Hydraulic pumps crane hydraulic, emergency steering………………43
Crane hydraulic “ON” ……………………………………………………………44
Crane hydraulic:…………………………………………………………………45
Overview hydraulic components……………………………………………..45
Main control block…………………………………………………………………46
Main control block – hydraulic, pressure sensor………………………..47
Slewing gear – activation, brake………………………………………………48
Temperature sensor, pretension valve……………………………………..49
Luffing cylinder, “boom steep”…………………………………………………50
Main hoist gear…………………………………………………………………….51
Auxiliary hoist gear*………………………………………………………………52
► Telescoping boom:……………………………………………………………..53
Base section………………………………………………………………………..53
Boom head………………………………………………………………………….54
Extension mechanics tele- / gripper pinning……………………………..55
Extension mechanics – gripper position……………………………………56
Tele- / gripper pinning, emergency operation……………………………57
► Special equipment:……………………………………………………………..58
Swing-away jib*……………………………………………………………………58
Back-up camera*, camera winches*………………………………………..59
Emergency control crane hydraulic*………………………………………..60
► Index………………………………………………………………………………….61

Liebherr Crane