The Liebherr LTM 1090-4.1 Mobile Crane earns its keep on tight schedules, so knowing exactly where each component sits saves real money in workshop time. The Technical Information & BMK Components Manual for SN 061975 is what your techs reach for when a wiring diagram says “K15” and they need to find it on the machine fast. This kind of BMK component identification manual gives you the map between drawings, fault codes, and the actual parts on the carrier and superstructure. That’s what keeps downtime predictable instead of chaotic.
What this manual helps you do
- Identify each Liebherr component by its BMK reference (E…, K…, V…, X…) and know what Liebherr calls it.
- Locate electrical, hydraulic, and mechanical components on the LTM 1090-4.1 using layout and outline diagrams.
- Trace a schematic reference from wiring or hydraulic diagrams to its physical position on the crane.
- Cross-reference fault codes or test points to the correct component on carrier or superstructure.
- Pinpoint components when planning repairs, routing harnesses, or training new techs on machine layout.
Who this is for
This suits workshop technicians, field service techs, fleet mechanics, electrical diagnostic engineers, and training instructors. If you need repair procedures, test values, or part numbers, you actually want a service manual or parts catalogue instead, not this BMK.
FAQ
Q: Is the PDF clear and searchable enough for day-to-day workshop use?
A: Yes, these BMK PDFs are usually clean, zoomable diagrams that you can search by component ID or term.
Q: Does it cover both the carrier and the superstructure?
A: Yes, this product combines BMK component identification for both the lower carrier and upper crane superstructure.
Q: Does it tie into other Liebherr manuals I already have?
A: Yes, the BMK reference designators are meant to match Liebherr wiring diagrams, hydraulic schematics, and parts catalogues.
Bottom line: If your question is “Where is this component and what does Liebherr call it?” this is exactly the right manual. If your question is “How do I fix or order it?”, you’ll need other books alongside this one.
📘 Show Index
Table of Contents:
Carrier — Table of Contents
- Chassis_1090-4.1_ab_061794
- Vehicle:
- View from front, lighting and mirrors
- View from rear, lighting
- Support control unit, side marker lights, right
- Support control unit, side marker lights, left
- Cab:
- Interior lighting, doors
- Ventilation and heat exchangers
- Operating elements
- Centre console – main switch, batteries, fuses, transformer
- Centre console – I/O modules and diagnostic connector
- Centre console – instrumentation module, Intarder ECU
- Centre console – relays
- Centre console – fuses
- Pressurized air system:
- Pressure sensors and valves in brake system
- Compressor and dryer
- Auxiliary load valve block
- Four channel ABV drive unit
- Diesel engine D 846 TI A7, 370 kW/503 PS (Common Rail)
- Left side view of engine
- Right side view of engine
- View of engine from flywheel side
- Top view of engine
- Injectors
- Fuel pumps
- Fuel Service Center FSC
- Rail pressure sensor
- Pressure limiting valve in fuel system
- Banjo bolts for limiting pressure in fuel system
- Speed sensor
- Charge air sensor
- Oil pressure sensor
- Water-cooled external exhaust gas return
- flame starting device
- Coolant level and temperature
- Engine control unit, air filter pressure
- Diesel fuel system
- Fuel prefilter and fuel tank
- Automatic shift transmission ZF 12 AS 2302 with Intarder:
- Clutch and transmission actuators
- Intarder
- Hydraulic pumps:
- Pumps, fan drive and cooling system
- Power train:
- Overview
- Transfer gearbox VG 2600 – contact switch and speed sensor
- Transfer gearbox – road/off-road switchover
- Contact switch on axle 1 and 2
- Contact switch on axle 3 and 4
- Wheel rotation sensors
- Retarder Telma Focal F 2200*
- Steering:
- Steering pumps and steering from superstructure
- Steering gear
- Fault monitoring, pressure/ emergency supply
- Active rear axle steering:
- Angle sensor
- I / O modules and resistor modules in the support operating units
- Hydraulic pumps rear axle steering axles 3, 4
- Bosch CAN valves, axles 3 and 4
- Valve block axle 3 and 4
- Support:
- Supporting valves left
- Supporting valves right
- Inclination sensor
- Supporting force display pressure sensor
- Axle suspension:
- Axles suspension feedback
- Filling and draining valves, left
- Filling and draining valves, right
- Special equipment:
- Battery charger
- External power supply 230V
- Navigation equipment*/ Navigation equipment* with reversing camera*
- Auxiliary heating
- Index Chassis
- Symbole
- – Engine oil
- – Fuel
- Fine filter…
- Fuel tank…
- Manual delivery pump…
- Suction filter…
- – Pumps
- Centring circuit…
- Emergency steering pump…
- Steering circuit 1…
- Steering circuit 2…
- A
- A1…
- A5…
- A9…
- A10…
- A11…
- A12…
- A13…
- A14…
- A15…
- A60…
- A61…
- A62…
- A68_B1…
- A68_Y1…
- A68_Y2…
- A69…
- A71…
- A77*…
- A100…
- A103…
- A103_4…
- A103_7…
- A104…
- A112…
- A130…
- A131…
- A145…
- A150_E…
- A150_M1…
- A150_M2…
- A151_E…
- A151_M1…
- A151_M2…
- A700…
- A700_X1…
- A700_X2…
- AF0…
- AF1…
- AF2…
- AF3…
- AF4…
- AF5…
- AF6…
- AF7…
- AF8…
- AF9…
- AF24…
- AF24_F1…
- AF24_F2…
- B
- B5…
- B6…
- B7…
- B8…
- B9…
- B11*…
- B12*…
- B13*…
- B14*…
- B28…
- B29…
- B30…
- B31…
- B39…
- B50…
- B51…
- B52…
- B70…
- B100…
- B141…
- B142…
- B143…
- B144…
- B701…
- B702…
- B703…
- B704…
- B707…
- B708…
- B711…
- B713…
- E
- E1…
- E2…
- E3…
- E4…
- E5…
- E6…
- E11…
- E12…
- E20…
- E21…
- E22…
- E25…
- E26…
- E27…
- E28…
- E40…
- E41…
- E50…
- E51…
- E60…
- E61…
- E62…
- E63…
- E64…
- E75…
- E80…
- E81…
- E82…
- E83…
- E84…
- E95…
- Engine oil
- E100…
- E101…
- E102…
- E103…
- E128_E1…
- E128_E2…
- E128_E3…
- E128_E4…
- E128_E5/E6…
- E128_E7…
- E128_E8…
- E129_E1…
- E129_E2…
- E129_E3…
- E129_E4…
- E129_E5/E6…
- E129_E7…
- E129_E8…
- E200…
- E204…
- E230…
- E231…
- E232…
- F
- G
- H
- K
- K40…
- K41*…
- K49…
- K56…
- K76*…
- K77*…
- K78*…
- K79*…
- L
- M
- M2…
- M9…
- M10…
- M11…
- M12…
- M19…
- M20…
- M21…
- M700…
- MP 1…
- MP 2…
- MP 5…
- MP 7…
- MP 8…
- MP11…
- MP16…
- MP19/20…
- N
- P
- R
- S
- S1…
- S4…
- S5…
- S12…
- S13…
- S14…
- S15…
- S16…
- S17…
- S18…
- S19…
- S22…
- S23…
- S30…
- S31…
- S33…
- S41…
- S42…
- S43…
- S44…
- S50…
- S51…
- S60…
- S61…
- S62…
- S63…
- S64…
- S65…
- S89…
- S90…
- S114…
- S116…
- S118…
- S119…
- S159*…
- S191…
- U
- X
- X29…
- X44…
- X45…
- X56…
- X64…
- X65…
- X90…
- X91…
- X92…
- X93…
- Y
- Y5…
- Y9a…
- Y9b…
- Y10…
- Y11…
- Y12…
- Y13…
- Y16…
- Y17…
- Y18…
- Y19…
- Y20…
- Y24…
- Y25…
- Y40…
- Y41…
- Y41 to Y44…
- Y42…
- Y43…
- Y44…
- Y49…
- Y50…
- Y51*…
- Y52…
- Y53…
- Y64…
- Y65…
- Y66…
- Y80a…
- Y80b…
- Y81a…
- Y81b…
- Y82a…
- Y82b…
- Y83a…
- Y83b…
- Y84a…
- Y84b…
- Y85a…
- Y85b…
- Y86a…
- Y86b…
- Y87a…
- Y87b…
- Y102a…
- Y102b…
- Y107…
- Y108…
- Y109…
- Y220…
- Y221…
- Y222…
- Y225…
- Y226…
- Y231…
- Y232…
- Y702…
- Y703…
- Y711…
- Y712…
- Y713…
- Y714…
- Y715…
- Y716…
Superstructure — Table of Contents
- Superstructure_1090-4.1_ab_061794
- Cab instruments:
- Liccon monitor, pedals
- Left master switch
- Right master switch
- Roof console
- Crane cab:
- Wiper system, radio system
- Heating, auxiliary heater
- Auxiliary heating
- Switch box:
- Slewing frame – fuses
- Slewing frame – relays
- CAN and LSB subscribers
- EMERGENCY OPERATION without LICCON system – X emerg. connector
- EMERGENCY OPERATION without LICCON system – Operation
- EMERGENCY OPERATION without LICCON system – Resistors
- Terminals, voltage converters
- Electric slewing platform:
- Diesel engine D 934 S TI A6, 145 kW/197 PS (PLD)
- Right side view of engine
- Plug-in pumps
- Fuel temperature sensor
- Fuel preliminary filter unit
- Left side view of engine
- Coolant temperature
- Top view of engine
- Frontal view of engine
- Speed sensor
- Oil pressure sensor
- Right installation view
- Radiator fan drive, air filter pressure
- Engine control unit LH ECU UP/CR
- Charge air and coolant temperature sensor
- Charge air pressure sensor
- Ventilation flap in intake air (optional)
- Cooling water level sensor
- Fuel tank and tank sensor
- Pressurized air system:
- Air dryer, cab platform
- Turntable locking mechanism, boom direction
- Hydraulic turntable:
- Hydraulic pump overview
- Hydraulic component overview
- Measuring connection plate overview
- Main control block with one hoist gear
- Main control block with hoist gear 2
- Main control block-pressure staging valves and pressure sensor
- Temperature sensor hydraulic oil
- Winch 1 and 2 – incremental sensor
- Winch 1 and 2 – brake actuation
- Auxiliary load
- Slewing gear – actuation, slewing angle indicator
- Slewing gear – brake
- Luffing gear
- Ballasting
- Turntable, general:
- Lighting turntable
- Central lubrication system
- Telescopic boom:
- Cable drums, angle and length sensors
- Boom head
- Tele pinning
- Tong pinning
- Hydraulic folding jib:
- Actuation
- Right angle sensor and limit switch 59
- Hydraulic components
- Special equipment:
- Dolly (trailer for boom transport, USA)
- Air conditioning system
- Index Superstructure
- Symbole
- – Engine oil
- Dipstick..
- Filter..
- Pump..
- – Fuel
- Delivery pump..
- Fine filter..
- Manual pump..
- Preliminary filter unit..
- – Pumps
- Pump 1..
- Pump 2..
- Pump 3..
- Pump 4..
- A
- A1..
- A2..
- A14..
- A15..
- A50..
- A417..
- A750..
- A750_X1..
- A750_X2..
- AF1..
- AF2..
- AF3..
- AF4..
- AF5..
- AF6..
- AF7..
- AF8..
- AF9..
- AF11..
- AF25..
- B
- B1..
- B2..
- B4..
- B6..
- B7..
- B17*..
- B19..
- B25..
- B26..
- B27..
- B28..
- B29..
- B30..
- B37..
- B38..
- B55..
- B62..
- B701..
- B703..
- B707..
- B708..
- B709..
- B710..
- B711..
- B712..
- B713..
- E
- E6..
- E7..
- E8*..
- E11..
- E12..
- E17..
- E18..
- E60..
- E96..
- Engine oil
- dipstick..
- filter..
- pump..
- E700X272..
- EP0..
- EP1..
- EP2..
- F
- F61..
- F62..
- F63..
- Fuel
- delivery pump..
- fine filter..
- preliminary filter unit..
- G
- H
- H21..
- H80..
- H95..
- H101..
- H102..
- H105..
- H106..
- H423..
- H616..
- H619..
- H633..
- H634..
- H660..
- K
- K1..
- K2..
- K11..
- K12..
- K13..
- K14..
- K15..
- K16..
- K17..
- K18..
- K19..
- K20..
- K21..
- K22..
- K23..
- K24..
- K25..
- K26..
- K27..
- K28..
- K29..
- K30..
- K31..
- K32..
- K33..
- K34..
- K35..
- K36..
- K37..
- K38..
- K39..
- K40..
- K41..
- K42..
- K51..
- K52..
- K53..
- K54..
- K55..
- K56..
- K57..
- K58..
- K59..
- K61..
- K62..
- K651..
- K652..
- M
- M2..
- M3..
- M4..
- M6..
- M7..
- M9..
- M13..
- M23..
- Manual
- M750..
- MP 1..
- MP 2..
- MP 3..
- MP 4..
- MP 5..
- MP 6..
- MP 7..
- MP 8..
- MP 9..
- MP 10..
- N
- P
- P2..
- P3..
- P12..
- P655..
- P656..
- R
- R4..
- R9..
- R50..
- R51..
- R52..
- R53..
- R59..
- S
- S1..
- S26..
- S27..
- S28..
- S29..
- S30..
- S32..
- S34..
- S35..
- S49..
- S50..
- S69..
- S72..
- S73..
- S77..
- S78..
- S81..
- S83..
- S84*..
- S89..
- S90..
- S103..
- S104..
- S301..
- S320..
- S321..
- S322..
- S323..
- S324..
- S325..
- S326..
- S327..
- S328..
- S401..
- S413..
- S420..
- S421..
- S424..
- S425..
- S427..
- S428..
- S602..
- S604..
- S606..
- S608..
- S610..
- S612..
- S614..
- S618..
- S624..
- S626..
- S628..
- S632..
- S636..
- S638..
- S640..
- S642..
- S644..
- S646..
- S648..
- S650..
- S652..
- S654..
- S901..
- S902..
- S903..
- S904..
- S905..
- S908..
- S912..
- S913..
- S914..
- S915..
- S918..
- S919..
- S930..
- S931..
- S940..
- T
- X
- X1..
- X2..
- X3..
- X4..
- X5..
- X6..
- X7..
- X8..
- X9..
- X10..
- X11..
- X12..
- X13..
- X14..
- X15..
- X16..
- X17..
- X18..
- X19..
- X20..
- X21..
- X22..
- X23..
- X24..
- X25..
- X26..
- X27..
- X28..
- X29..
- X30..
- X31..
- X32..
- X33..
- X34..
- X35..
- X36..
- X37..
- X38..
- X39..
- X40..
- X49..
- X50..
- X51..
- X52..
- X53..
- X54..
- X55..
- X56..
- X57..
- X107..
- X108..
- X205S31..
- X268..
- X269..
- X298..
- X417..
- X501..
- X519..
- X5B11..
- X5B12..
- XMLSB2..
- XNOT..
- Y
- Y1a..
- Y1b..
- Y3..
- Y4a..
- Y4b..
- Y5..
- Y6a..
- Y6b..
- Y10..
- Y11..
- Y12..
- Y17a..
- Y17b..
- Y18..
- Y19a..
- Y19b..
- Y20..
- Y21..
- Y22..
- Y23..
- Y27..
- Y28..
- Y31..
- Y32..
- Y38..
- Y40..
- Y49..
- Y56..
- Y58..
- Y66..
- Y67..
- Y69..
- Y80a..
- Y80b..
- Y82..
- Y85a..
- Y85b..
- Y103a..
- Y103b..
- Y109..
- Y137..
- Y139..
- Y141..
- Y142..
- Y711..
- Y712..
- Y713..
- Y714..
Liebherr Crane
