Mobile Crane (8421-1) is a Technic LEGO set released in 2005 with 1,885 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Technic sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 201 unique part types.
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Building instructions
2 official booklets — read on BrickID
BYGGEVEJLEDNING, 8421/1 IN BYGGEVEJLEDNING, 8421/2
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Parts in this set
201 parts · page 1 of 5 · updating…
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![Battery Box, 9V 4 x 14 x 4 with Dark Bluish Gray Base [Complete Assembly]](https://cdn.rebrickable.com/media/parts/ldraw/14/74650c01.png)
Battery Box, 9V 4 x 14 x 4 with Dark Bluish Gray Base [Complete Assembly]2847c03 · ×1 · Yellow -
Brick 2 x 62456 · ×4 · Yellow -
Brick Round 2 x 2 with Axle Hole3941 · ×3 · Trans-Neon Orange -
![Grille 1 x 4 [Two Pins]](https://cdn.rebrickable.com/media/parts/elements/4153120.jpg)
Grille 1 x 4 [Two Pins]30622 · ×2 · Yellow -
Hook, Technic - Large70496 · ×1 · Black -
Hose, Pneumatic 4mm D. 16L5102c16 · ×1 · Black -
Hose, Pneumatic 4mm D. 16L5102c16 · ×1 · Blue -
Large Figure Skeletal, Limb 1 x 3 x 7 Beam with Axle Holes (Bohrok)41672 · ×2 · Black -
Motor, RC Race Buggy42908 · ×1 · Black -
Plate 1 x 104477 · ×2 · Black -
Plate 1 x 23023 · ×2 · Dark Bluish Gray -
Plate 1 x 23023 · ×13 · Yellow -
Plate 1 x 33623 · ×6 · Yellow -
Plate 1 x 33623 · ×2 · Dark Bluish Gray -
Plate 1 x 43710 · ×16 · Yellow -
Plate 1 x 63666 · ×1 · Light Bluish Gray -
Plate 1 x 63666 · ×1 · Black -
Plate 1 x 63666 · ×10 · Yellow -
Plate 1 x 83460 · ×6 · Yellow -
Plate 1 x 83460 · ×8 · Dark Bluish Gray -
Plate 2 x 23022 · ×3 · Yellow -
Plate 2 x 2 Corner2420 · ×2 · Yellow -
Plate 2 x 33021 · ×1 · Yellow -
Plate 2 x 83034 · ×1 · Yellow -
Plate 4 x 63032 · ×1 · Dark Bluish Gray -
Plate 4 x 83035 · ×1 · Dark Bluish Gray -
Plate Round 1 x 1 with Solid Stud6141 · ×4 · Trans-Neon Orange -
Plate Round 1 x 1 with Solid Stud6141 · ×2 · Trans-Red -
Plate Round 1 x 1 with Solid Stud6141 · ×6 · Trans-Clear -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×3 · Black -
![Plate Round 2 x 2 with Rounded Bottom [Boat Stud]](https://cdn.rebrickable.com/media/parts/elements/265426.jpg)
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]2654 · ×3 · Black -
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)3794a · ×6 · Light Bluish Gray -
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)3794a · ×2 · Yellow -
![Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]](https://cdn.rebrickable.com/media/parts/elements/244426.jpg)
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]2444 · ×2 · Black -
Plate Special 2 x 2 with 2 Pin Holes2817 · ×1 · Yellow -
Pneumatic Cylinder Bracket53178 · ×2 · Yellow -
Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm)47225 · ×2 · Yellow -
Pneumatic Pump New Style with Black Top2797c02 · ×1 · Yellow -
Pneumatic Switch with Pin Holes47223a · ×1 · Dark Bluish Gray -
![Pneumatic T-Piece (T Bar) [New Style]](https://cdn.rebrickable.com/media/parts/elements/4211508.jpg)
Pneumatic T-Piece (T Bar) [New Style]4697b · ×1 · Light Bluish Gray -
Slope Inverted 45° 2 x 13665 · ×4 · Dark Bluish Gray -
Sticker Sheet for Set 8421-153535 · ×1 · [No Color/Any Color] -
String Cord Medium Thickness 250cm14728c250 · ×1 · Black -
String with End Studs 31L Overall14226c31 · ×2 · Black -
Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle)6553 · ×2 · Black -
Technic Axle 103737 · ×5 · Black -
Technic Axle 123708 · ×2 · Black -
Technic Axle 2 Notched32062 · ×24 · Red