Used Liebherr 91 Ec for sale (229)

Condition: used, Year of construction: 2009, Liebherr crane 160 HC-L 8/16 including remote control: 160 HC-L 8/16 height: 37.5 m, reach 55 m, serial no. 30349039 Year of manufacture: 2009 Incl. the following crane parts: 1 undercarriage cross 2 base ballast A 7.5 to 12 base ballast B 4.8 to 1 boom 611. 10.7m 1 boom 621 8m 2 booms 622 10.35m 1 boom 631 5.18m 1 boom 641 tip Djdpfevx Eccox Ahnjuu 1 base tower 12.42m 5 tower section 4.14m "Completely repaired, sandblasted and repainted! This crane has been completely overhauled and is in excellent condition. Old paint and rust layers were thoroughly removed by sandblasting before a high-quality new coat of paint was applied. Subject to changes, errors and advance sales! You can find more vehicles on our Sales are made exclusively in accordance with our terms and conditions - see Homepage Important note? Important information: Despite careful checking of all details in our offer, errors may creep in. These are sometimes caused by transmission errors in the systems of the various platform providers. We would therefore like to point out that all information is provided without guarantee and does not represent a legal claim. Legal: This sales advertisement does not represent an offer within the meaning of Section 145 of the German Civil Code (BGB). Rather, it is information for the initiation of a contract. The information provided here is without guarantee and therefore does not represent any guaranteed properties.

Condition: used, Year of construction: 2012, operating hours: 15,000 h, LIEBHERR R 964 C – ONE OWNER – EXCELLENT CONDITION – BACKHOE EXCAVATOR ----VEHICLE HISTORY ONE OWNER GERMAN MACHINE ----VEHICLE FEATURES ----BRAND LIEBHERR ----TYPE TRACKED EXCAVATOR BACKHOE EXCAVATOR ----YEAR OF MANUFACTURE 2012 ----OPERATING HOURS 15,000 h ----POWER 320 kW ----ENGINE LIEBHERR ENGINE ----MAINTENANCE SERVICED EXCLUSIVELY BY LIEBHERR ----AVAILABLE IMMEDIATELY ----EXPORT SALES ONLY WITH DEPOSIT (SECURITY) OF AT LEAST €500–€2,000 ----EXPORT DECLARATION/CUSTOMS—EXW AVAILABLE IN 10 MINUTES (AUTHORIZED EXPORTER); 5-DAY, 30-DAY PLATES AND 17–21 DAYS FOR AUSTRIAN REGISTRATION, EURO 1 VEHICLE RESERVATIONS ONLY VIA EMAIL FUNCTION. VERBAL RESERVATIONS ARE NOT VALID! Duodpfx Ahjw Ua Trjnou A deposit of at least €500/€1,000 is required for sales to the EU and third countries. (For sales to the EU and third countries, a deposit/guarantee of at least €500.00/€1,000.00 will be levied.) Subject to changes, errors, and prior sale! You will find more vehicles on our website. Sales are made exclusively according to our Terms and Conditions — see website. Important Notice: Despite careful verification of all details in our offer, errors may occur. Some originate from transmission errors between the systems of various platform providers. Therefore, please note that all information is provided without guarantee and does not constitute a legal claim. Legal information: This sales advertisement does not constitute an offer as defined by §145 BGB. Instead, it is provided for the initiation of a contract. The information provided here is without guarantee and therefore does not represent warranted characteristics.

Condition: used, mileage: 185,652 km, power: 240 kW (326.31 HP), first registration: 10/2011, fuel type: diesel, overall weight: 36,000 kg, axle configuration: 8x6, fuel: diesel, color: yellow, driver cabin: other, gearing type: other, emission class: none, suspension: other, total length: 10,400 mm, Year of construction: 2011, construction height: 3,900 mm, This used Liebherr LTC 1045-3.1 is a powerful truck with crane superstructure, ideal for commercial applications. The crane was manufactured in 2011 and has a mileage of 185,652 km. Powered by a robust diesel 6x6 drive, the truck delivers 240 kW (326 hp) and a displacement of 7,201 cc, ensuring reliable performance and high efficiency. The vehicle is accident-free and features a yellow paint finish. It comes equipped with a green emissions sticker (Euro 4), allowing operation in urban environments. The crane supports various loading options and is perfectly suited for construction sites or other specialized operations. A Certificate of Conformity (CoC) is available, and all technical data has been determined to the best of our knowledge. Viewings are possible Monday to Friday and on Saturdays. If interested or for further questions, please contact us by phone or email. Registration service and delivery within Germany are available at an additional cost. Dsdpfxexvfa Sj Ahneuu Sale to commercial customers only (agriculture, freelancers, small and large businesses) or for export. Subject to prior sale and errors excepted.

Condition: used, Year of construction: 2017, operating hours: 8,340 h, Beautiful machine - Well equipped - No play in the joints - No oil leaks! VIN: VATZ1265CZB044737 Year of manufacture: 2017 Original operating hours: 8,350 hours Liebherr dealer maintained Special factory paint RAL 1027 curry yellow 4-cylinder inline engine, water-cooled with turbocharging, 103 hp Hydrostatic travel drive with 2 speed ranges – max. 32 km/h * Standard Z-bar linkage * Ride control / boom suspension * Hydraulic quick coupler with installation kit * Liebherr factory-installed central lubrication system * 3rd hydraulic control circuit for high-tip / grab bucket / or 4-in-1 bucket * Steel lamp brackets instead of plastic * Rear tow hitch * "Comfort" suspended driver’s seat * Comfort radio * 2 LED work lights at rear of cab roof * 2 LED work lights at front of cab roof * Adjustable steering column * Rotating beacon / warning strobe on the center of the cab roof * Crane / lashing eyes at rear and front frame * Fire extinguisher * Road approval 32 km/h Tires 17.5 x 25 L3, front axle: 2 tires, 95% tread, like new!! Tires 17.5 x 25 L3, rear axle: 2 tires, 95% tread, like new!!! Permissible total weight approx. 10,500 kg Operating weight approx. 8,500 kg Offer includes quick coupler and 1.6 cbm standard bucket – Price: €46,900 net (export), plus 19% VAT for domestic sales Djdpfxsyqn Hls Ahnjuu Optional attachments at additional cost: · Folding bucket 2 cubic meters from €3,550 · High-tip bucket · Screening / mixing bucket, manufacturer "Wolf" · 5-ton pallet fork from €2,190 Prices net plus VAT or for export Sale only to businesses or for export. Sale in as-is condition. No guarantee or warranty. The indicated operating hours or kilometer readings are taken from the hour or odometer counter; we do not guarantee their accuracy! Subject to prior sale. The vehicle description does not represent a binding offer and the details provided should not be regarded as warranted characteristics. The description and information serve only for general identification of the vehicle and do not constitute a legal warranty. Information is not guaranteed to be complete. Any details/descriptions and images are non-binding and do not represent assured properties. Only the stipulations in the order confirmation and invoice are binding. The seller assumes no liability or warranty. The advertisement may contain typing or data transmission errors. The seller has not inspected the machine. Equipment needs to be checked separately if necessary. We gladly accept your vehicle as a trade-in. For further questions, please contact us. For our international customers, we can prepare all customs and export documents for smooth transfer abroad.

Condition: new, fuel type: diesel, color: yellow, gearing type: mechanical, suspension: other, , new Liebherr bucket handle for Liebherr A904C-LI-1003 New price approx. €6,000.00 net FOR US, THE CONDITION AND THE GUT FEELING ARE DECISIVE, THE PRICE COMES SECOND. If you have any further questions, please do not hesitate to contact Mr. Faller on the number. //*EXCHANGE, TRADE-IN OR LOAN FOR YOUR VEHICLE, AS WELL AS FINANCING POSSIBLE! All information without guarantee* You can find further offers on our homepage: The description and data provided do not represent a guarantee and are not binding. The purchase contract that is concluded in the car dealership when purchasing the vehicle is binding. Errors and prior sale reserved! Duodpfx Ael Tpanshneu

Condition: used, Year of construction: 2012, Equipment: all wheel drive, Liebherr Wheel Loader L 524 Z 2 plus 1 Very nice machine!!! Mostly original paint. Good equipment. No particulate filter? No AdBlue. VIN: VATZ0659-031705 Z – Lifting device Year of manufacture: 2012 – last year of production without a particulate filter Delivery: 08.11.2012 – therefore, one of the last models without a particulate filter! All servicing carried out by Liebherr. Last registered service: 25.01.2004 at 9900 hours. Recorded operating hours: 10307. Liebherr 4-cylinder in-line engine, water-cooled with turbocharging and charge air cooling, 118 hp. Hydrostatic drive with 3 travel ranges: Travel range 1: 0 – 6.0 km/h Travel range A1-2: 0 – 16.0 km/h Travel range A1-3: 0 – 34.0 (40) km/h * Ride damping for the lifting device – lifting device damping * Hydraulic additional control circuit for high-dump bucket, grab bucket, silage block cutter, sweeper, etc. * Central lubrication system * Air conditioning * Pre-separator for engine intake air * Comfort driver's seat with pneumatic suspension * 4 x work lights on the front of the cab roof * 2 x work lights at the rear * Rear window heating * Battery disconnect switch * Rotating beacon (flashing light on the rear of the cab roof) * Road approval possible Duodozb S Inopfx Ahnju Machine width: 2500 mm * Front tire: 17.5 x 25 L3 - 35% * Rear tire: 17.5 x 25 L3 - 35% Offer with quick coupler and 2.0 cubic meter bucket for the price of €46,900.00 net + VAT, ex warehouse Gemmingen. Additional equipment available at an extra charge: * High-dump bucket from 2.5, from €4,950.00 * Bucket with retaining bar for quick coupler, 3.0 cubic meters, €3,660.00 * 4-in-1 bucket, 2 cubic meters, on request. * Pallet fork, 5 tons, from €2,190.00 If desired, also available with a used scale! Pfreudt WK 70 * If desired, with a printer for the scale. Sale only to commercial businesses or for export. Sale as is, where is. No guarantee or warranty. The indicated mileage or operating hours are read from the odometer or hour meter; we do not guarantee the accuracy of this information! Subject to prior sale. The vehicle description does not constitute a binding offer, and the information provided is not to be regarded as guaranteed properties. The description and the information contained therein serve only to generally identify the vehicle and do not constitute a guarantee in the legal sense. The information does not claim to be complete. The information/descriptions and images provided are non-binding and do not constitute guaranteed properties. Only the specifications in the order confirmation and invoice apply. The seller assumes no liability/warranty. The advertisement may contain typographical and data transmission errors. The seller has not inspected the machine. Equipment must be checked separately if necessary. We will also gladly accept your vehicle as part of the payment. For further questions, please do not hesitate to contact us. For our customers from abroad, we will prepare all customs and export documents for a smooth transfer abroad.

Condition: used, Year of construction: 2018, operating hours: 8,800 h, Equipment: all wheel drive, Liebherr L 546 Z 2plus1 Serviced by Liebherr - all services performed - Up to 8165 hours as of April 23, 2025 Original paint Chassis No. VATZ1560CZB049144 Year of manufacture: 2018 Operating hours: approx. 8800 4-cylinder inline engine 120 KW/163 HP, water-cooled with turbocharging, Emission level 4 Operating weight approx. 15000 kg Machine width: 2500mm Dujdpfx Ahozb S Ihonou Hydrostatic drive with 3-speed gearbox * 3rd hydraulic circuit for attachments such as high-dump bucket, grab bucket, etc. * Ride vibration damper BSS - boom damping * Central lubrication system, factory-installed by Liebherr * Fluff screen in front of the cooler package prevents contamination * Cooler with coarse mesh for easier cleaning * Reversing fan for cleaning the cooler package - reverse operation * Automatic engine shutdown after 5 minutes of idling * Climbing aid in front of the windshield for easier cleaning of the windshield * Air filter with pre-separator "TopAir" for pre-cleaning the intake air * Premium display with touchscreen * Driver's seat "Comfort" with pneumatic suspension, seat heating and headrest * Air conditioning * Adjustable steering column * Right armrest * Opening window on the left in the driver's door * Foldable exterior mirrors * Radio with hands-free system * Cooler box in the cab * Audible reversing warning device (beeper) * Reversing camera * 4 work lights on the rear roof of the cab, LED * 4 work lights on the front roof of the cab, LED * Protective grille for headlights * Piston rod protection for tilting cylinder * Automatic bucket return * Fire extinguisher on the fender Reversing camera defective! Tires 20.5 x 25 BKT Earthmax L3, front 2 x 30% Tires 20.5 x 25 BKT Earthmax L3, rear 2 x 30% Net price with permanently mounted earth bucket approx. 2.8 cubic meters 63,900.-- € net + VAT. - --- Available equipment at an extra charge: * Hydraulic quick coupler 3,550.00 € * Grab bucket 3 cubic meters 3,980.00 € * Volume bucket 5 cubic meters 3,990.00 € * High-dump bucket from 3-5.5 cubic meters from 3,950.00 € * Pallet fork 5 or 8 tons from 2,190.00 € Can also be supplied with a scale: Pfreundt WK50 3,900 € Can also be supplied with Pfreudt printer All prices net export - domestic plus 19% VAT. We can gladly offer you the transport to your location. Sale only to commercial customers or for export. Sale in the current condition as the machine is. No guarantee or warranty. The indicated mileage or operating hours are read from the odometer or hour meter, we do not guarantee the accuracy! Subject to prior sale. The vehicle description does not constitute a binding offer and the information given is not to be regarded as guaranteed characteristics. The description and the information given therein serve only for the general identification of the vehicle and do not constitute a guarantee in the legal sense. The information does not claim to be complete. The information/descriptions and images given are non-binding and do not constitute guaranteed characteristics. Only the specifications in the order confirmation and invoice apply. The seller assumes no liability/warranty. The advertisement may contain typing and data transmission errors.

Condition: used, Year of construction: 2006, operating hours: 14,683 h, Equipment: all wheel drive, Adjustable boom, twin tyres, used vehicle Duodpfeyg T Erox Ahnju Vehicle No. 3285, Liebherr A 316 Litronic mobile excavator, Year: 2006, Operating hours: 14,683, adjustable boom, air conditioning, tyres: 10.00-20, twin tyres with spacer rings, hydraulic connections for attachments, dozer blade 2,550 mm, Liebherr SW 48 quick coupler, 1 x bucket 1 metre, 1 x hydraulic bucket 2 metres, 4-cylinder Deutz diesel with 86 kW, refuelling pump, 20 KMH, total weight: 17,500 kg, registered as a self-propelled working machine, for inquiries please, errors and prior sale excepted.

Condition: used, color: other, Year of construction: 2020, operating hours: 850 h, Serial number: 58157 Machines for Sale! Duedpfxsxxxhuo Ahneu Browse our website for a variety of machines ready for purchase. We have more options than what you see online, so feel free to call or email us anytime.  All our machines are fully maintained and checked for reliability. Need pictures? Just contact us, and we'll share them promptly.   We're here to assist you in Dutch, English, French, German, Spanish and Russian. Discover our wide range of reliable machines. 

Condition: used, color: other, Year of construction: 2020, operating hours: 1,291 h, Serial number: 57987 Machines for Sale! Browse our website for a variety of machines ready for purchase. We have more options than what you see online, so feel free to call or email us anytime.  Duodpou Dmq Asfx Ahnou All our machines are fully maintained and checked for reliability. Need pictures? Just contact us, and we'll share them promptly.   We're here to assist you in Dutch, English, French, German, Spanish and Russian. Discover our wide range of reliable machines. 

Condition: used, color: other, Year of construction: 2019, operating hours: 1,400 h, Power internal combustion engine: 61 HP (45 kW) GVW: 5.180 kg Make of engine: Yanmar Lifting capacity: 2.950 kg CE mark: yes Serial number: 57768 Machines for Sale! Browse our website for a variety of machines ready for purchase. We have more options than what you see online, so feel free to call or email us anytime. All our machines are fully maintained and checked for reliability. Need pictures? Just contact us, and we'll share them promptly.   We're here to assist you in Dutch, English, French, German, Spanish and Russian. Dujdpfx Ahezbk Utoneu Discover our wide range of reliable machines. 

Condition: used, Year of construction: 2012, Liebherr Crane 42 K.1, slewing crane, used, 50.742 Dodpfxey Thg Se Ahneuu Used slewing crane, Liebherr 42 K.1, manufactured in 2012. This crane is suitable for construction sites, high-rise construction, and general lifting operations. Includes frequency converter control, a universal power-sensitive distributor, and cable set. Manufacturer: Liebherr Model: 42 K.1 Machine type: Slewing crane Serial number: 50.742 Year of manufacture: 2012 Outreach: 36.0 m Hook height: 21.0 m Foldable, quick-assembly crane Frequency converter control included Universal power-sensitive distributor included Cable set included Power supply: Three-phase / universal power Application area: Construction site, high-rise construction, assembly work Condition: used

Condition: excellent (used), functionality: limited functionality, Year of construction: 2000, For sale: High-quality Liebherr concrete mixing plant in excellent condition – including BIBKO wastewater treatment system A used, excellently maintained concrete mixing plant from the renowned manufacturer Liebherr is for sale. The plant impresses with its low operating hours, complete technical documentation, and original delivery condition – all components come from the manufacturer itself. Important addition Also included in the offer is a wastewater treatment system from BIBKO Umwelttechnik & Beratung GmbH. This allows for environmentally friendly and economical reuse of residual and wash water, which not only reduces operating costs but also meets the ecological requirements of modern production processes. Main technical data Type: Ringtellermischer R 1.0 Practical mixing capacity: 1.0 m³ solid concrete per batch Efficient filling: A 6m³ truck mixer is filled in only 6 batches Theoretical mixing capacity: 50 m³/h Practical mixing capacity: 40 m³/h Aggregate storage Star storage: 1,200 m³ total capacity Active storage: 65 m³ Number of aggregate components: 5 Dujdpjwlwruefx Ahnju Cement silos 2× cement silo at 40 t each with overfill protection 1× two-piece cement silo at 80 t with overfill protection Condition of the plant Commissioning: 2000 Out of operation: since 2006 Operating hours: approx. 3,500 (estimated) Condition: Very good – minimal use, excellently maintained Previous owner: First owner Originality: All components original from Liebherr Documentation: Fully available (electrical diagrams, foundation plans, structural analysis, etc.) The solid and well-thought-out construction of the plant enables easy disassembly and reassembly thanks to the predominantly bolted design. The control cabinets are connected to each other via plug connections – for details, please refer to the attached PDF documents. Additional service upon request: We are happy to support you in realizing your project with experienced partner companies for: Dismantling and reassembly Electrical commissioning (industrial electronics technician) Organization of transport with reliable forwarding agents This way, your new plant can be quickly and professionally put into operation at a new location. Interested? We look forward to your inquiry and are always available to answer any questions you may have!

Condition: used, Year of construction: 2011, operating hours: 17,000 h, Equipment: ABS, all wheel drive, Liebherr L 576 2plus2 Year of manufacture 2011 17,000 hours Scale Central lubrication system Air conditioning GERMAN MACHINE, first owner Weight approx. 27.5 tons Bucket approx. 4.5 cubic meters Tel: We are happy to take care of your financing or leasing. EU sale: net upon presentation of company documents and tax/VAT number. VAT deposit 2,000 € We speak English. We speak Srpsko-Hrvatski. Our services for you: - Customs license plates - Export documents and EUR1 - Worldwide transport - Accommodation options - Transfer from Munich Airport or Passau train station Duedoyiifdepfx Ahnju Tel:

Condition: used, Year of construction: 2012, Liebherr Crane 42 K.1, Underslung Crane, Used, 50,465 Used underslung crane, Liebherr 42 K.1, manufactured in 2012. This crane is suitable for construction sites, high-rise construction, and general lifting operations. Includes frequency converter control, a universal power-sensitive distributor, and cable set. Manufacturer: Liebherr Model: 42 K.1 Machine Type: Underslung Crane Serial Number: 50,465 Year of Manufacture: 2012 Outreach: 36.0 m Hook Height: 21.0 m Foldable quick-assembly crane Frequency converter control included Universal power-sensitive distributor included Cable set included Power Supply: Three-phase / Universal Power Application: Construction site, high-rise construction, assembly work Dodpfxey Thgfj Ahneuu Condition: Used Location: Berlin

Condition: used, Year of construction: 1981, max. wheel diameter 36 mm gear width 36 mm Dsdpfxey S Ec Ie Ahnouu max. module 10 total power requirement 12 kW weight of the machine ca. 11,2 t

Condition: used, Year of construction: 2016, operating hours: 17,628 h, Weighing system, quick coupler, bucket, fork, Very well-maintained machine, good tires, Previously used by a German company (concrete plant) Dodpfx Ajyuym Eohneuu

Condition: used, gearing type: automatic, fuel type: diesel, empty load weight: 11,000 kg, tire size: 9.0-20 / 6mm, axle configuration: 4x4, suspension: steel, total length: 7,000 mm, total width: 25,500 mm, total height: 3,000 mm, front tire size: 9.0-20 / 6mm, driver cabin: day cab, wheelbase: 2,400 mm,

Condition: used, Year of construction: 2015, operating hours: 15,583 h, Equipment: ABS, LIEBHERR LH 22 M LITRONIC Imported / Accident-FREE IN VERY GOOD CONDITION! ? YEAR OF PRODUCTION: 2015 ? BETRIEBSSTD. 15 583 Std TEL: * KUBA - POLSKI, ENGLISH, DEUTSCH, ITALIANO * SEBASTIAN - POLSKI, DEUTSCH, ITALIANO, ????? * LASZLO - MAGYAR * COSTEL - ROMÂN? (Romana facem toate formalitatile pt export inclusiv nr) Duodpfx Aeycbb Hjhnju RADEK - ?????

Condition: used, Year of construction: 2008, Equipment: ABS, LIEBHERR PELLE A316 Imported / Accident-FREE IN VERY GOOD CONDITION! Duodpfx Ahoum Ihyjneu ? YEAR OF PRODUCTION: 2008 ? BETRIEBSSTD. 18 887 Std TEL: * KUBA - POLSKI, ENGLISH, DEUTSCH, ITALIANO * SEBASTIAN - POLSKI, DEUTSCH, ITALIANO, ????? * LASZLO - MAGYAR * COSTEL - ROMÂN? (Romana facem toate formalitatile pt export inclusiv nr) RADEK - ?????

Condition: used, Year of construction: 2020, operating hours: 5,000 h, * Liebherr R920 Compact LC tracked excavator * Year of manufacture: 2020 * 4,990 operating hours * 22,400 kg * 110 kW * OQ65 fully hydraulic quick coupler * Variable-geometry boom * Blade * Central lubrication system * Refueling pump * Air conditioning Dedpfszbwn Hex Ahnouu * 3 m undercarriage width * 75 cm track pads * 180° camera * Undercarriage in very good condition * Maintained according to service schedule

Condition: used, mileage: 1 km, power: 1 kW (1.36 HP), first registration: 07/2012, fuel type: diesel, overall weight: 21,000 kg, axle configuration: > 3 axles, next inspection (TÜV): 06/2028, color: green, gearing type: mechanical, emission class: euro5, Year of construction: 2012, Equipment: ABS, air conditioning, Internal vehicle number: G300402_Concrete German vehicle Located at our yard in Kaufungen - Kassel, available immediately More information at * Luis Lucena (German, English, Spanish, French) * Viktoria Sologubova (Polish, Russian, Ukrainian, English) Liebherr concrete mixer 10 m³ Year of manufacture: 2012 Djdpfxoxy Umco Ahnjuu Gross vehicle weight: 32,000 kg Unladen weight: 6,530 kg Errors excepted We are happy to take your used vehicle in part exchange. Financing available directly through us. GOLEC COMMERCIAL VEHICLES GMBH We speak: German, English, Spanish, Polish, Ukrainian, Russian, Bulgarian. ----.

Condition: excellent (used), functionality: fully functional, fuel type: diesel, operation weight: 24,600 kg, Year of construction: 2016, operating hours: 11,622 h, LIEBHERR LH24M, operating hours: 11,622. Weight: 24,600 kg. Engine: LIEBHERR 105W. Industrial boom: 6.10 m. Industrial stick: 4.50 m. Hydraulic cabin. Solid tires. Four outriggers. Cabin grill. CE certificate. In very good condition. Dodpfx Aoy U Huwjhnouu

Condition: used, Year of construction: 1990, machine/vehicle number: 211462, Total weight: 10,500 kg, operating hours: 10,900 h, with loading bucket Dodjy Rvpvjpfx Ahnsuu

Condition: used, Year of construction: 2001, machine/vehicle number: 630-8394, Power 210 kW, with additional boom, Type: LO4651B, Serial No. 3001335, Operating hours: 9,050 h, Note: The long front is equipped with both a long and a short arm boom; NOTE: The long front excavator is located at a construction yard on Wankelstraße, 41352 Korschenbroich, Germany! Dsdpfx Ahsy Rvlwjnsuu