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LEGO Technic Mobile Crane MK II (42009)

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LEGO Technic Mobile Crane MK II (42009) -  LEGO - Toys"R"Us
LEGO Technic Mobile Crane MK II (42009) -  LEGO - Toys"R"Us
LEGO Technic Mobile Crane MK II (42009) -  LEGO - Toys"R"Us
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Product Description

Get ready for the biggest, most complex LEGO Technic model ever-- the Mobile Crane MK II (42009)! Drive this 2,350-piece behemoth of a model into position with the cool 8-wheel steering and rotate the superstructure. Then activate the included LEGO Power Functions motor to extend the outriggers, lower the feet and extend or raise the crane arm up to 75cm into the air. Lower the hook with the working winch and get ready to lift the load! This authentic 2-in-1 model also features 10 wheels, 5 axles and a detailed V8 motor with moving pistons. Rebuilds into a container stacker and truck featuring Power Functions motor-powered extending and raising boom.

Additional Info

834073

FB89AC14

673419191890

6025223

9.3 pounds

22.7 x 18.9 x 3.7

How to Get It


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Average Customer Rating:

by PowerReviews
LEGO Technic Mobile Crane MK II (42009)
 
4.9

(based on 51 reviews)

Ratings Distribution

  • 5 Stars

     

    (46)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

98%

of respondents would recommend this to a friend.

Pros

  • Durable (9)
  • Fun (6)
  • Creative (5)
  • Colorful (4)
  • Easy to assemble (3)

Cons

    Best Uses

    • Imaginative play (4)
    • Motor skills development (4)
    • Older children (4)
      • Reviewer Profile:
      • Parent of two or more children (4)
      • Was this a gift?:
      • No (5)

    Most Helpful Positive Review

     

    THE BIGGEST AND BADDEST MOBILE CRANE.

    This crane is the biggest with a record breaking 2,606 pieces. Many say this Lego set has the most pieces recorded on a Technic Lego set. When you hold the giant box, trust...Read complete review

    This crane is the biggest with a record breaking 2,606 pieces. Many say this Lego set has the most pieces recorded on a Technic Lego set. When you hold the giant box, trust me its heavy. You can almost carry anything with this monster crane. So have fun. Oh one more thing, you need a lot of patience, it took me 3 and a half hours just to complete the main truck.

    VS

    Most Helpful Critical Review

     

    Epic model, with an epic flaw

    I'm the odd one out here, seems everyone here is happy with 42009. Really can't say much more thats all ready been said about 42009. In saying that my experience with 42009 has...Read complete review

    I'm the odd one out here, seems everyone here is happy with 42009. Really can't say much more thats all ready been said about 42009. In saying that my experience with 42009 has been somewhat disappointing. Those annoying outriggers, could never quite figure them; I was left unhappy with it. Over looked build, no mistakes that I did, just mistake by that one Lego designer who made 42009. Those out riggers are just flawed , was that unhappy sold it to someone else to deal with the puzzle. Wile I enjoyed the build and like the look of it, I could not keep an model with a design flaw, sad to see it go happy that I no longer have to look at a paper weight. Shame that the outriggers spoil the whole model.

    Reviewed by 51 customers

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    4.0

    A good successor to 8421, but room for improvement

    By mbellis

    from DERBY

    Comments about LEGO Technic Mobile Crane MK II (42009):

    This crane has a lot to live up to, being the successor to 8421 and also a flagship set. Functionality and Play value: - 4-axle steering works well, but the rake is small. This is a common problem with Technic sets. A real crane of this number of wheels or more (e.g. 7 sets in the main body) can turn easily enough at a set of traffic lights but I doubt the 42009 model would make it round the corner at a scale junction. I removed the blue half pins from the front set of wheels and this made an improvement but the wheels are close to binding on other parts. You just know that if the instructions show half pins restricting the steering then it won't be enough. The steering philosophy of Technic sets needs to be improved. Look at 8479 barcode truck the best example. - Engine and differential gear are the usual fare. They work well. There might be room for a gearbox next to the vertical row of 5 z16 cogs. - The stabilisers are more realistic than 8421. More width of extension would be nice but the long axles and sliding cogs are a welcome improvement to the Technic range of mechanisms. My crane did have a problem getting enough torque to the mini-LAs for dropping the feet though. The white clutch gear slipped when that function was engaged. I think an extra instruction step to test the stabilisers from a temporary motor drive (before building the jib unit) might be a good idea. - The raising of the jib works well, though I have doubts about the linear actuator gearing. The design of the LAs has changed, to improve their internal clutch, but has this resulted in complacency of design by using the gear arrangement from excavator 8043 that failed with the old LAs? This is teaching kids bad engineering. We should be explaining to them why the gears should all line up so that all the LAs extend similarly as the jib is raised, without any differential movement between them. Otherwise someone will do that on a real machine and cause an expensive problem! Don't let poor design principles creep into LEGO sets! - The jib extension works OK but the ratio of extension to original length is poor. More extension from the same length should have been possible. As a follow-on to 8421, a further extension should have been included, otherwise Technic crane technology would not move forward. Of course real cranes can have 6 or 7 telescopic extensions with hydraulics, which would not be possible within a reasonable weight for geared Technic models. - The winch function works well but is a bit slow. - According to the jib gearbox, some of the functions need the motor direction to be reversed in order to make a consistent movement of the whole crane e.g. raise, extend and lower the hook. This makes operating the crane a learning process. Pros: - Stabiliser mechanisms are a useful development. - Stabiliser slide support with angled cross blocks is effective. - Red sliding z8 cogs and long axles. - Plenty of racks, 4x steering and doubled-up for stabilisers. - L-motor has plenty of power, but not as much as the 8421 motor. - Well-built chassis spreads the weight and remains stiff. - 2600 parts is a welcome increase in Technic set size. I look forward to Technic sets of 5000 parts! Cons: - I wish the yellow panel parts (6 on the jib) had not needed additional recessed holes. I hope these will not be needed again. Their design pollutes the population of excellent smooth panels that we have enjoyed in other sets. Unfortunately, once the parts are made, the mould will be used until it expires. I am unlikely to buy any set containing the revised panels unless they are really needed. - Stabiliser drop function can have torque issues if not tested before adding the jib. - Mis-use of linear actuator clutches to solve differential issue in jib raising gear trains. 8043 excavator lesson not learnt. - Needs more extension of the jib compared to its original length. I think this is an adequate successor to 8421 but some functions are not quite so good. Steering rake and jib extension ratio should be improved next time. Looks are not quite as good as 8421, partly because the wheel hubs are the other way round. Value for money is good in parts count terms. For the Mk III crane, in a few years' time, I would like to see a mobile crane using the Unimog wheels, with pneumatics for most of the functions. It would be possible to use pneumatics to drive all of them if extensions, rotating air engines and proportional steering techniques were employed; this would certainly add to the Technic range of mechanisms. It would need several compressors. I would like to see the return of a motor like the 8421 motor as it is more powerful (torque x speed) than the Power Functions motors and more suitable for driving high loads quickly. I have seen a real mobile crane with 7 sets of wheels in the main body, 3 steering at the front and 2 at the back, with a 4-wheel trolley carrying the counterweights. Time to start the design now! An additional small crane for lifting counterweights onto the back of the jib would be an opportunity for a realistic additional mechanism to offset the cost.

    Comment on this review

    (0 of 2 customers found this review helpful)

     
    2.0

    Epic model, with an epic flaw

    By Avalon98

    from Strathpine

    Comments about LEGO Technic Mobile Crane MK II (42009):

    I'm the odd one out here, seems everyone here is happy with 42009. Really can't say much more thats all ready been said about 42009. In saying that my experience with 42009 has been somewhat disappointing. Those annoying outriggers, could never quite figure them; I was left unhappy with it. Over looked build, no mistakes that I did, just mistake by that one Lego designer who made 42009. Those out riggers are just flawed , was that unhappy sold it to someone else to deal with the puzzle. Wile I enjoyed the build and like the look of it, I could not keep an model with a design flaw, sad to see it go happy that I no longer have to look at a paper weight. Shame that the outriggers spoil the whole model.

    Comment on this review

     
    5.0

    Magnificent set

    By LegoBuilderDownUnder

    from Sydney

    Comments about LEGO Technic Mobile Crane MK II (42009):

    Now this has to be a true landmark in the world of Lego Technic. The vast array of functions, adaptability and play value stuns one's mind. And all for less than 300 bucks. Compare this to the Cargo Plane, for example, which has less than half the number of pieces but a lot more than half the price. So this thing has great value for a start, aided by the lack of motors, remote controls, IR receivers and the like which make other, smaller sets, more expensive. Let us start with the first part you build - the truck chassis. This is an incredibly dense area and a lot bigger than it looks like in the pictures. It contains more than half of the entire build's components. The cab is well designed (although the doors open ridiculously wide), with all the details you'd expect, like a steering wheel, wing mirrors, and adjustable head rests.The stickers also combine brilliantly with the build. The steering and actual ride is incredibly smooth for the weight of the beast. The differential also works well. The only glitch in this section is the outriggers. They deploy okay, but lowering them is very slow. I know people have said this in other reviews, but I didn't really think it could be that bad, until I tried it. It really is s-l-o-w. By the way, manually pulling the outriggers out is much faster than doing it electronically. The next phase is the superstructure. This can be really complicated - it's easy to miss a cog or put the wrong beam on the wrong connectors. The gearbox is well laid out and easy to use and the whole superstructure turns nicely in it's frame in the chassis - for a full 360 degrees, which is great. The cab here is compact yet recognisable, with joystick, opening door and, again, adjustable headrests. The motor is very well hidden and I like how the battery box is easily accessible and works as a counterweight. The last phase is the boom, which is a very interesting build. It is built for strength and takes longer than you'd think to make. The way both boom sections extend simultaneously thanks to some clever string placement is a nice touch. The string attached to the superstructure attaches to the boom with ease, and the hook on the end is a surprisingly strong build. Just make sure the gear on the boom for extension attaches properly to the gear on the superstructure - you may have to add a half bush in front of it for it to meet the other gear properly. Once you've finished, you notice it is an exceptionally large build, far longer than it appears on the box, and way cooler looking. The power functions for the boom work well, although I wish the boom raising/lowering and the hook mechanism had a bit more grunt. It can't lift as much as you'd expect - maybe a small Technic pullback racer, but that's about it. I tested the boom's strength by holding it upright in it's position while electronically lowering it, hence pulling the chassis up. It just got the front wheels off the ground then burnt out. Possibly not the best idea to try out... Other than the slight lack of power and the slow speed of the lowering of the outriggers, this crane is amazing. It's huge, yet it glides along. It's boom extension is skinny, yet can cope with a lot of stress. The superstructure is extraordinarily complicated, yet the functions work seamlessly. There's 2,606 pieces yet they all combine to create the biggest beast of a mobile crane that Technic has ever launched - the Mark II 42009. Well done Lego and roll on the Mark III.

    Comment on this review

     
    5.0

    HUGE Technic set

    By claydog

    from Anahiem

    Comments about LEGO Technic Mobile Crane MK II (42009):

    This was my bigest lego set ever and i is awsome. Lego blu mi mined out when i got it. Overall this carane is awsome an HUGE. There is two bad things, the outriggers are supper slow and the winch does not pick up that much waight compard to its scale. But it is still awsome. Pros HUGE doors open tall sturty Cons outrigers are super slow winch is not strong

    Comment on this review

     
    5.0

    Awesome Build

    By TonyA

    from amelia

    Comments about LEGO Technic Mobile Crane MK II (42009):

    This set was truly a challenge. That's a good thing! I like the fact that a LEGO set can really challenge me in the building process. The time and effort put in to this build was well spent! THANK YOU LEGO!! You people are the best!! :-)

    Comment on this review

     
    5.0

    Awesome LEGO and Lightning Fast Delivery

    By LEGO builder's mom

    from Topeka, KS

    Verified Buyer

    Pros

    • Creative
    • Fun
    • Sturdy

    Cons

      Best Uses

      • Older Children

      Comments about LEGO Technic Mobile Crane MK II (42009):

      This is an amazing LEGO set! My 11 year old son couldn't wait for it to arrive and start building. It has exceeded his expectations. Instructions are well written although complex. This is a challenging LEGO for the experienced builder.

      • Was this a gift?:
      • No

      Comment on this review

       
      4.0

      Crane

      By Blessing316

      from Barberton

      Comments about LEGO Technic Mobile Crane MK II (42009):

      A few pieces were missing from the project. Overall a very detailed and interesting project. However the motor seem underpowered and it struggles to move features sometimes. I am going to order the XL motor and see if this helps. But I am pleased with my purchase

      Comment on this review

       
      5.0

      awesome build

      By saahmad

      from Karachi

      Comments about LEGO Technic Mobile Crane MK II (42009):

      as an adult fan of lego i found it a challenging build as i had to get it right first time. once finished the size is pretty big for a toy. intend adding motors to make it mobile. i was impressed by the amount of weight the crane could lift. 228 grams. awesome !. the two different shades of yellow pieces were the only negative about the model.

      Comment on this review

       
      5.0

      Holy Cow! Amazing!

      By khach

      from Anchorage

      Comments about LEGO Technic Mobile Crane MK II (42009):

      Get ready for the most incredible LEGO model ever. I built this with my 18 year old son and we spent about 10 hours doing this. The set comes with 3 distinct phases and 6 (YES SIX!) huge instruction booklets. The truck portion has 3 booklets, the crane base has 2 and the crane arm has 1 booklet. The first phase (parts bags labeled with a "1") is the longest and intense. We REALLY suggest sorting all parts as you begin each phase. (for example putting all identical parts in a pile before beginning each phase) The 20 minutes you invest in this will payoff due to the sheer VOLUME of pieces! The thought that went into this model is nothing short of AMAZING. They really put something amazing together here. As you build BE SURE to make certain that all axles and gears spin very freely. With all the transfer of motion from place to place in this model it is important that power moves easily. The 4 way shifting of the power unit on the crane base is nothing short of genius! The use of parts was well thought out and we (both long time builders) were very impressed. The use of the battery pack as a counter balance was great and the use of the string to telescope the the smallest section of the crane arm was a great way to use power efficiently. Be sure to look at the instructions carefully on this one a small mistake early on in the build could make you nuts later on. Test each function as you go. You will love building this model.

      Comment on this review

       
      5.0

      Brilliant

      By Matt4935

      from Ayr

      Comments about LEGO Technic Mobile Crane MK II (42009):

      When I first unboxed this product I was amazed the the sheer amount of pieces. it was my biggest Lego set ever and my first technic set, so I wasnt sure how well i would do building it. I would only recommend this product if youve had years of lego experience, and preferably some technic experience (I made numerous mistakes throughout). I set about building it and it was incredibly complex, but easily worth it. the most incredible part of the set has to be the gearbox which controls all the motorised functions. Its tricky to build but incredibly clever. Overall this set is difficult but amazing.

      Comment on this review

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      5.0 stars

      $219.99 $199.99

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