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1. Dead battery box on an 8421

   

   Discussion by saeble · August 2012 · Home› Building and Techniques

   Hey Guys, I just recently purchased a new(to me) 8421 Crane. Sadly, the battery box/motor combination is DOA. The battery box is corroded in a few places and I fear the internals of the switch are toast. Does anyone have photos/exploded diagram of the internals of the battery box ? Once I've fixed/eliminated this issue…

2. Lego Technic 42009 Mobile Crane MK II

   

   Discussion by JamesJT · January 2013 · Home› Collecting

   Is is Mk2 version of 8421 or 8053?

   4 results

3. Re: Predictions on Discontinuing Sets and their Secondary Market Value

   

   Comment by FollowsClosely · August 2013 · Home› Buying & Selling Topics

   #8421 will not be hurt by #42009 in any way. They will only help one another. #8421 for the fans and #42009 for the Wealthy fans.

   6 results

4. Re: LEGO 2013 Summer Sets

   

   Comment by Ardalis · December 2012 · Home› Collecting

   Another Mobile crane to sit in the shadow of 8421 by the looks of it. No wow factor on Technic sets sofar :(

5. Re: Lego Technic Massive Collection Forsale

   

   Comment by Marko · November 2011 · Home› Marketplace

   How much for the 8421-crane set, and do you ship worldwide? Tnx [email protected]

   2 results

6. Hello From Maryland!

   

   Discussion by Cyberdragon · August 2017 · Home› Introduce yourself

   I've been playing with LEGOs since I was a little kid when I would get them as gifts. I probably don't have nearly as many sets as a lot of you guys do, and unfortunately don't have much money (or space) for more. I've gotten more into LEGO now since I discovered LDD, and hopefully one day I'll be able to buy more real…

   2 results

7. Re: The One That Got Away: Biggest Non-Purchase Regret

   

   Comment by Eric · April 2011 · Home› Collecting

   I regret missing out on the 8421 Mobile Crane, but back then I was only 12, and it was well out of my $12 price range. :/

   2 results

8. Re: Outrageous Retired Set Prices, Are you willing to pay?

   

   Comment by TonyV5 · April 2011 · Home› Buying & Selling Topics

   One of the worst in the UK is the 8421 Mobile Crane original RRP £89.99 now for sale on Amazon Uk for £699.95 nearly an 800% mark-up!

   2 results

9. Re: Technic in the aftermarket

   

   Comment by ColoradoBricks · August 2013 · Home› Buying & Selling Topics

   #8421 was on my list of older sets to get until #42009 came around, I think it might have lost some appeal in the past 6 months.

   2 results

10. Massive WTB/T thread (WW)

    

    Discussion by SprinkleOtter · September 2016 · Home› Marketplace

    I'm looking to acquire quite a few sets/parts. I am willing to either buy or trade, if a deal can be worked out. I am open deals anywhere- when buying on bricklink it is commonly cheaper for me to buy from overseas, so that might hold true here, as well. I've grouped everything in lists: High priority: #7417 Temple of…

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