BlockTalk Find Your Set

Free tool

LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Simple Mechanisms Set

Checking

9630 Simple Mechanisms Set

219 pieces in 63 part and color combinations.

LEGO counts 277 pieces. This inventory comes from a separate parts catalog and lists 219; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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.

Show

Piece checklist

Light Gray 65 pieces

  • Motor Pulley, 9V Micromotor with axle hole Light Gray Part 2983 Element 298630 ×1
  • Technic Axle Connector Ridged [with + Hole + Orientation] Light Gray Part 6538a ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×6
  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×4
  • Technic Beam 1 x 4 Thin with Stud Connector Light Gray Part 2825 Element 4107133 or 282502 ×2
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×18
  • Technic Cam Light Gray Part 6575 Element 657502 ×2
  • Technic Engine Crankshaft Center Light Gray Part 2854 Element 285402 ×2
  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×2
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×2
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Gray Part 3650c Element 365002 ×2
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×2
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×3
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×10
  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×1
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2

Black 63 pieces

  • Brick Special 2 x 6 x 2 Weight with Sealed Bottom and Dimples on Ends Black Part 73090b Element 6094053 or 73843 ×1
  • Hook, Technic - Large Black Part 70496 Element 70644 ×1
  • Rubber Band Large [Square Cross Section] Black Part 70158 ×8
  • String Cord Thin (0.5mm) 100cm Black Part 56823c100 Element 6179847 or 6123920 ×1
  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Link Black Part 3711a Element 371126 ×24
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×10
  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×1
  • Tyre 30 x 10.5 Offset Tread Black Part 2346 Element 234676 or 234626 ×4
  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×2

Red 44 pieces

  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×4
  • Brick 2 x 4 Red Part 3001 Element 300121 ×2
  • Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×4
  • Storage Bin, Dacta, Small Red Part upn0032 ×1
  • Technic Brick 1 x 10 [9 Pin Holes] Red Part 2730 Element 273021 ×2
  • Technic Brick 1 x 12 [11 Pin Holes] Red Part 3895 Element 389521 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×4
  • Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Red Part 85544 Element 4544145 or 4544143 ×5

Blue 29 pieces

  • Plate 1 x 10 Blue Part 4477 Element 447723 ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×6
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×2
  • Plate 1 x 8 Blue Part 3460 Element 346023 ×2
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×2
  • Plate 6 x 8 Blue Part 3036 Element 303673 or 303623 ×1
  • Technic Plate 1 x 5 with Toothed Ends, 2 Studs and Center Axle Hole Blue Part 2711 Element 4522085 or 4195721 ×2
  • Technic Plate 2 x 4 [3 Holes] Blue Part 3709 Element 370923 ×4
  • Technic Plate 2 x 8 [7 Holes] Blue Part 3738 Element 373823 ×4
  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×2

Yellow 15 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Yellow Part 6553 Element 655324 ×2
  • Technic Gearbox 2 x 4 x 3 1/3 Yellow Part 6588 Element 658824 ×1
  • Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×2
  • Wheel with Split Axle hole Yellow Part 3482 Element 348224 ×10

Trans-Clear 2 pieces

  • Storage / Sorting Tray, Dacta, 45 Compartment for Dacta Small Bin Trans-Clear Part 4107400 ×1
  • Storage Bin Lid, Dacta, 19 x 24 Trans-Clear Part 71082 ×1

Green 1 piece

  • Baseplate 16 x 16 Green Part 3867 Element 4217115 or 609828 ×1

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

Sets inside this set

This set packs other sets whose pieces are listed separately. Check each one:

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy