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Bucket Wheel Excavator

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42055 Bucket Wheel Excavator

3,929 pieces in 168 part and color combinations.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Technic Pins 1,622 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×28
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 18 spares in the box ×724
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×162
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×457
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Dark Bluish Gray Part 11214 Element 6015356 ×60
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 2 spares in the box ×39
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×64
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 5 spares in the box ×19
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×15
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×3
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 5 spares in the box ×34
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×17

Technic Beams 795 pieces

  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×8
  • Technic Beam 1 x 2 Thick Blue Part 43857 Element 6057802 or 4185665 ×4
  • Technic Beam 1 x 11 Thick Dark Bluish Gray Part 32525 Element 4603472 or 4534914 ×59
  • Technic Beam 1 x 11.5 Double Bent Thick Dark Bluish Gray Part 32009 Element 6271155 or 4210668 ×12
  • Technic Beam 1 x 15 Thick Dark Bluish Gray Part 32278 Element 32278199 or 4542576 ×75
  • Technic Beam 1 x 3 Thick Dark Bluish Gray Part 32523 Element 32523199 or 4210751 ×93
  • Technic Beam 1 x 3 Thin Dark Bluish Gray Part 6632 Element 6632199 or 6364452 ×35
  • Technic Beam 1 x 7 Thick Dark Bluish Gray Part 32524 Element 4495931 or 4210752 ×50
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Dark Bluish Gray Part 6629 Element 6279883 or 4210638 ×13
  • Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin Dark Bluish Gray Part 32249 Element 6590060 or 6336745 ×2
  • Technic Beam 3 x 5 L-Shape Thick Dark Bluish Gray Part 32526 Element 4210753 ×53
  • Technic Beam 1 x 13 Thick Light Bluish Gray Part 41239 Element 4522934 or 4156299 ×18
  • Technic Beam 1 x 15 Thick Light Bluish Gray Part 32278 Element 4542577 or 4211770 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×26
  • Technic Beam 1 x 5 Thick Light Bluish Gray Part 32316 Element 4211651 ×101
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Light Bluish Gray Part 11478 Element 6328063 or 6029206 ×6
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Light Bluish Gray Part 32348 Element 6278129 or 4211668 ×9
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Light Bluish Gray Part 32271 Element 6276836 or 4211624 ×9
  • Technic Beam 1 x 9 Thick Light Bluish Gray Part 40490 Element 6102449 or 4211866 ×27
  • Technic Beam 2 x 4 L-Shape Thick Light Bluish Gray Part 32140 Element 6271831 or 4211610 ×38
  • Technic Beam 3 x 3 L-Shape Thin Light Bluish Gray Part 32056 Element 6271815 or 4211574 ×2
  • Technic Beam 3 x 3 T-Shape Thick Light Bluish Gray Part 60484 Element 4552348 or 4535772 ×15
  • Technic Beam Triangle Thin [Type II] Light Bluish Gray Part 99773 Element 6331428 or 6009019 ×8
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Orange Part 60483 Element 6265128 or 6057526 ×3
  • Technic Beam 1 x 4 Thin with Stud Connector Red Part 2825 Element 6392956 or 4227649 ×2
  • Technic Beam 1 x 11 Thick White Part 32525 Element 6028103 or 4296265 ×7
  • Technic Beam 1 x 2 Thin White Part 41677 Element 6371416 or 4163533 ×18
  • Technic Beam 1 x 3 Thick White Part 32523 Element 6632140 or 4208160 ×2
  • Technic Beam 1 x 5 Thick White Part 32316 Element 4249021 or 4140465 ×14
  • Technic Beam 1 x 7 Thick White Part 32524 Element 6564912 or 6318056 ×11
  • Technic Beam 3 x 5 L-Shape Thick White Part 32526 Element 6632144 or 4585040 ×4
  • Technic Beam 1 x 15 Thick Yellow Part 32278 Element 4542579 or 4237445 ×6
  • Technic Beam 1 x 2 Thick Yellow Part 43857 Element 4187122 ×30
  • Technic Beam 1 x 3 Thick Yellow Part 32523 Element 4153707 ×2
  • Technic Beam 1 x 4 Thin Yellow Part 32449 Element 6327559 or 4199345 ×8
  • Technic Beam 1 x 5 Thick Yellow Part 32316 Element 4142133 or 4128590 ×10
  • Technic Beam 1 x 5 Thin Yellow Part 32017 Element 4503425 or 4199343 ×1
  • Technic Beam 1 x 7 Thick Yellow Part 32524 Element 4495934 or 4187082 ×7
  • Technic Beam 1 x 7 Thin Yellow Part 32065 Element 4114672 ×3

Technic Connectors 403 pieces

  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×12
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×31
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×13
  • Technic Axle and Pin Connector Perpendicular Split Black Part 92907 Element 6279021 or 4610371 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Black Part 15100 Element 6073231 ×35
  • Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Black Part 87408 Element 6278412 or 4558692 ×6
  • Technic Axle and Pin Connector Block 4 x 3 x 2 1/2 [Linear Actuator Holder] Dark Bluish Gray Part 61904 Element 6356106 or 4528038 ×2
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×33
  • Technic Pin Connector Hub with 2 Perpendicular Axles Dark Bluish Gray Part 10197 Element 6005331 ×1
  • Technic Pin Connector Round 1L [Beam] Dark Bluish Gray Part 18654 Element 6100030 3 spares in the box ×5
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×3
  • Technic Axle and Pin Connector Angled #3 - 157.5° Light Bluish Gray Part 32016 Element 6261387 or 4211552 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×51
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×15
  • Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Across Part) Light Bluish Gray Part 55615 Element 4296059 ×24
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×12
  • Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×4
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Light Bluish Gray Part 87082 Element 4560175 ×20
  • Technic Pin Connector Perpendicular 2 x 2 Bent Light Bluish Gray Part 44809 Element 4211880 ×2
  • Technic Pin Connector Perpendicular Long Light Bluish Gray Part 32557 Element 4211714 ×2
  • Technic Pin Connector Round [Slotted] Red Part 62462 Element 6173126 or 4526984 ×8
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×7
  • Technic Pin Connector Round [Slotted] White Part 62462 Element 6550164 or 6173116 ×4
  • Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×51
  • Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×35
  • Technic Axle and Pin Connector Angled #6 - 90° Yellow Part 32014 Element 6268925 or 6072968 ×17
  • Technic Axle and Pin Connector Perpendicular Yellow Part 6536 Element 6261367 or 4173666 ×4

Technic Axles 282 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×12
  • Technic Axle 8 Black Part 3707 Element 370726 ×7
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×20
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×9
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×9
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×9
  • Technic Axle 5 with Stop Dark Tan Part 15462 Element 6055631 ×10
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×39
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×11
  • Technic Axle 10 Red Part 3737 Element 6130005 or 4267858 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×42
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×5
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×4
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×17
  • Technic Axle 11 Yellow Part 23948 Element 6130012 ×3
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×67
  • Technic Axle 9 Yellow Part 60485 Element 6130010 ×14

Technic Special 218 pieces

  • Technic Link Tread Wide with Two Pin Holes, Reinforced Black Part 88323 Element 6014648 Also in Dark Bluish Gray ×88
  • Technic Link Tread Wide with Two Pin Holes, Reinforced Dark Bluish Gray Part 88323 Element 4566742 Also in Black ×116
  • Technic Linear Actuator with Dark Bluish Gray Ends [Improved Version] Light Bluish Gray Part 61927b Element 6153715 or 4638507 ×2
  • Technic Changeover Catch - + opening Red Part 6641 Element 6099696 or 4270473 ×4
  • Technic Digger Bucket 4 x 7 Yellow Part 24120 Element 6145856 ×8

Technic Gears 161 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×25
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×2
  • Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×1
  • Technic Tread Sprocket Wheel Small 6 Tooth Black Part 57520 Element 4662228 or 4544527 ×8
  • Technic Turntable Large Type 3 Top, 60 Tooth Black Part 18938 Element 6109283 ×2
  • Technic Turntable Small Base, 28 Tooth Black Part 99010 Element 6326620 or 4652236 ×2
  • Technic Driving Ring 3L Dark Bluish Gray Part 18947 Element 6100931 ×4
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×2
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×5
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×22
  • Technic Gear 20 Tooth Bevel with Pin Hole Light Bluish Gray Part 87407 Element 4558690 ×19
  • Technic Turntable Large Type 3 Base Light Bluish Gray Part 18939 Element 6109285 ×2
  • Technic Turntable Small Top Light Bluish Gray Part 99009 Element 4652235 ×2
  • Technic Worm Gear Light Bluish Gray Part 4716 Element 4211510 ×1
  • Technic Gear 16 Tooth with Clutch on Both Sides Red Part 18946 Element 6100930 ×22
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×12
  • Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×9
  • Technic Gear 24 Tooth Clutch with Dark Bluish Gray Center White Part 76244 Element 6198486 or 6036892 ×3
  • Technic Gear Rack 1/4 Circle 11 x 11, 35 Teeth Yellow Part 24121 Element 6400559 or 6151167 ×14
  • Technic Knob Wheel Yellow Part 32072 Element 6284189 or 4203493 ×2

Bricks Round and Cones 112 pieces

  • Brick Round 1 x 1 Open Stud Dark Bluish Gray Part 3062b Element 4211090 ×40
  • Brick Round 2 x 2 Dome Top, Hollow Stud Dark Bluish Gray Part 30367c Element 4161674 ×16
  • Brick Round 1 x 1 Open Stud Light Bluish Gray Part 3062b Element 4211412 ×40
  • Brick Round 2 x 2 Dome Top, Hollow Stud Light Bluish Gray Part 30367c Element 4211637 ×16

Technic Bushes 92 pieces

  • Technic Bush Red Part 3713 Element 6271820 or 4227155 7 spares in the box ×53
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 6 spares in the box ×39

Technic Beams Special 61 pieces

  • Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×5
  • Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick Light Bluish Gray Part 64178 Element 4540797 ×3
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×53

Wheels and Tyres 59 pieces

  • Tyre 49.53 x 20 Black Part 15413 Element 6518565 or 6055626 ×4
  • Tyre Offset Tread with Center Band 23 x 7 Black Part 61254 Element 4541455 ×1
  • Technic Wedge Belt Wheel [aka Pulley] Dark Bluish Gray Part 4185 Element 6321744 or 4587275 ×32
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×5
  • Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Light Bluish Gray Part 13971 Element 6359807 or 6044729 ×13
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Light Bluish Gray Part 56145 Element 4297210 ×4

Technic Panels 38 pieces

  • Technic Panel 3 x 11 x 1 Dark Blue Part 15458 Element 6531637 or 6151062 ×13
  • Technic Panel 3 x 11 x 1 Dark Bluish Gray Part 15458 Element 6127205 ×8
  • Technic Panel 5 x 11 x 1 Light Bluish Gray Part 64782 Element 6474925 or 4621555 ×4
  • Technic Panel 5 x 11 x 1 White Part 64782 Element 6004135 or 4580019 ×1
  • Technic Panel 5 x 11 x 1 Tapered White Part 18945 Element 6097440 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B White Part 11946 Element 6330084 or 6114580 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A White Part 11947 Element 6343987 or 6114583 ×2
  • Technic Panel 5 x 11 x 1 Tapered Yellow Part 18945 Element 6310998 or 6099546 ×2
  • Technic Panel Curved and Bent 6 x 3 Yellow Part 24116 Element 6268010 or 6133245 ×4

Bricks Sloped 24 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Light Bluish Gray Part 54200 Element 4521921 or 4244372 1 spare in the box ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Clear Part 54200 Element 6245250 or 4244362 2 spares in the box ×22

Plates 12 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×11
  • Plate 4 x 6 White Part 3032 Element 303201 ×1

Technic Steering, Suspension and Engine 12 pieces

  • Technic Steering / CV Joint Axle Dark Bluish Gray Part 92906 Element 4610374 ×5
  • Technic Steering / CV Joint Light Bluish Gray Part 32494 Element 6265690 or 6122217 ×5
  • Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×2

Panels 8 pieces

  • Panel 1 x 1 x 1 Corner White Part 6231 Element 6619293 or 623101 ×8

Tiles Special 8 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Dark Blue Part 2412b Element 6022579 or 4507076 ×8

Bars, Ladders and Fences 6 pieces

  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Black Part 6020 Element 602026 ×4
  • Bar 3L Light Bluish Gray Part 87994 Element 6093527 or 6064033 1 spare in the box ×1
  • Bar 4L (Lightsaber Blade / Wand) Yellow Part 30374 Element 6116606 or 4193511 ×1

Tiles Round and Curved 4 pieces

  • Tile Round 1 x 1 White Part 98138 Element 6564903 or 6284572 1 spare in the box ×4

Bricks Special 2 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Light Bluish Gray Part 87087 Element 4558953 ×2

Electronics 2 pieces

  • Battery Box, Power Functions 4 x 11 x 7 with Orange Switch and Dark Bluish Gray Covers [Complete Assembly] [New Version] Light Bluish Gray Part 16511 Element 6368436 or 6257768 ×1
  • Motor, XL, Power Functions, 6 x 5 x 6, 20cm with Dark Bluish Gray Bottom Light Bluish Gray Part 58121 Element 6102930 or 6073386 ×1

Plates Round Curved and Dishes 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×2

Tiles 2 pieces

  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×2

Plates Wedged 1 piece

  • Wedge Plate 2 x 4 Light Bluish Gray Part 51739 Element 4507056 or 4252368 ×1

Stickers 1 piece

  • Sticker Sheet for Set 42055-1 [No Color/Any Color] Part 27091 Element 6181834 or 6155286 ×1

Technic Bricks 1 piece

  • Technic Brick 1 x 4 [3 Pin Holes] Light Bluish Gray Part 3701 Element 4211441 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 3 x 4 x 3 Trans-Brown Part 84954 Element 6514069 or 6244759 ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

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