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LEGO · LEGO · No. 8421-1

Mobile Crane

Unknown Technic

The manufacturer has approved the data, but no images.

Parts
1,885
Difficulty
Challenging (4 of 5)
Released
2005
Grid
Standard grid

Source: Rebrickable. Data from Rebrickable (rebrickable.com)

Parts list (1,885 pieces, without spare parts)

SelectDescriptionColorCount
Technic Pin with Friction Ridges Lengthwise and Center Slots
2780
Black 234
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots
6558
Black 158
Technic Axle Pin with Friction Ridges Lengthwise
43093
Blue 106
Technic Axle 3
4519
Light Bluish Gray 55
Technic Bush
3713
Light Bluish Gray 52
Technic Axle 5
32073
Light Bluish Gray 40
Technic Axle 4
3705
Black 34
Technic Axle and Pin Connector Perpendicular
6536
Yellow 34
Technic Beam 2 x 4 L-Shape Thick
32140
Dark Bluish Gray 32
Technic Axle 7
44294
Light Bluish Gray 30
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
32123b
Light Bluish Gray 30
Technic Beam 1 x 7 Thick
32524
Light Bluish Gray 29
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
32054
Yellow 29
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole
32184
Black 28
Technic Axle Connector Ridged [with x Hole x Orientation]
6538b
Light Bluish Gray 27
Technic Axle 2 Notched
32062
Red 24
Technic Beam 1 x 5 Thick
32316
Light Bluish Gray 24
Technic Pin 1/2 without Friction Ridges
4274
Light Bluish Gray 20
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes
42003
Light Bluish Gray 19
Technic Beam 1 x 15 Thick
32278
Light Bluish Gray 19
Technic Axle and Pin Connector Perpendicular
6536
Light Bluish Gray 18
Technic Beam 1 x 5 Thick
32316
Yellow 18
Technic Axle and Pin Connector Perpendicular
6536
Black 17
Technic Beam 1 x 4 Thin
32449
Light Bluish Gray 17
Technic Bush
3713
Black 17
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
32054
Light Bluish Gray 17
Plate 1 x 4
3710
Yellow 16
Technic Brick 1 x 16 [15 Pin Holes]
3703
Yellow 16
Technic Axle 5.5 with Stop [Flat Short End]
32209
Dark Bluish Gray 15
Technic Axle Connector Ridged [with x Hole x Orientation]
6538b
Black 15
Technic Beam 1 x 3 Thin
6632
Light Bluish Gray 15
Technic Beam 1 x 13 Thick
41239
Black 14
Technic Beam 3 x 3 L-Shape Thin
32056
Blue 14
Technic Beam Triangle Thin [Type I]
2905
Black 14
Technic Pin Connector Hub Perpendicular 3L with 4 Pins
48989
Light Bluish Gray 14
Tile 1 x 8 with Groove
4162
Yellow 14
Plate 1 x 2
3023
Yellow 13
Technic Pin Long without Friction Ridges - Single Slot
32556a
Light Bluish Gray 13
Technic Axle and Pin Connector Angled #1
32013
Yellow 12
Technic Beam 1 x 2 Thin
41677
Red 12
Technic Beam 1 x 3 Thick
32523
Dark Bluish Gray 12
Technic Pin 3/4
32002
Dark Bluish Gray 12
Technic Beam 1 x 9 Thick
40490
Dark Bluish Gray 11
Technic Beam 3 x 5 L-Shape Thick
32526
Light Bluish Gray 11
Technic Gear 8 Tooth
3647
Light Bluish Gray 11
Plate 1 x 6
3666
Yellow 10
Technic Beam 1 x 7 Thick
32524
Yellow 10
Technic Gear Rack 1 x 4
3743
Light Bluish Gray 9
Plate 1 x 8
3460
Dark Bluish Gray 8
Technic Axle and Pin Connector Angled #1
32013
Light Bluish Gray 8
Technic Axle and Pin Connector Perpendicular
6536
Dark Bluish Gray 8
Technic Beam 1 x 11.5 Double Bent Thick
32009
Dark Bluish Gray 8
Technic Beam 1 x 15 Thick
32278
Yellow 8
Technic Beam 3 x 5 L-Shape Thick
32526
Black 8
Technic Gear 16 Tooth with Round Holes [Old Style]
4019
Light Bluish Gray 8
Tyre 62.4 x 20
32019
Black 8
Wheel 43.2 x 18 with Extended Axle Stem
32020
Light Bluish Gray 8
Technic Axle 8
3707
Black 7
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole
32184
Light Bluish Gray 7
Technic Beam 1 x 13 Thick
41239
Yellow 7
Technic Beam 1 x 3 Thick
32523
Yellow 7
Plate 1 x 3
3623
Yellow 6
Plate 1 x 8
3460
Yellow 6
Plate Round 1 x 1 with Solid Stud
6141
Trans-Clear 6
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)
3794a
Light Bluish Gray 6
Technic Axle Connector with Axle Hole
32039
Yellow 6
Technic Beam 1 x 11 Thick
32525
Light Bluish Gray 6
Technic Beam 1 x 15 Thick
32278
Black 6
Technic Beam 1 x 2 Thin
41677
Dark Bluish Gray 6
Technic Beam 2 x 4 L-Shape Thick
32140
Yellow 6
Technic Beam 3 x 5 L-Shape Thick
32526
Blue 6
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin
32250
Black 6
Technic Engine Connecting Rod
2852
Light Bluish Gray 6
Technic Engine Cylinder with Side Slots
2850a
Light Bluish Gray 6
Technic Engine Piston Round
2851
Yellow 6
Technic Slope Long 1 x 6 with 3 Pin Holes
2744
Yellow 6
Technic Axle 10
3737
Black 5
Technic Axle 6
3706
Black 5
Technic Axle and Pin Connector Angled #2 - 180°
32034
Black 5
Technic Brick 1 x 14 [13 Pin Holes]
32018
Yellow 5
Technic Gear 12 Tooth Bevel
6589
Light Bluish Gray 5
Technic Gear 12 Tooth Double Bevel
32270
Light Bluish Gray 5
Technic Gear 16 Tooth with Clutch [Toothed]
6542a
Dark Bluish Gray 5
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening]
32269
Light Bluish Gray 5
Brick 2 x 6
2456
Yellow 4
Brick Sloped Inverted 45° 2 x 1
3665
Dark Bluish Gray 4
Brick Wedged, Angled 4 x 2 Left
41768
Yellow 4
Brick Wedged, Angled 4 x 2 Right
41767
Yellow 4
Plate Round 1 x 1 with Solid Stud
6141
Trans-Neon Orange 4
Technic Beam 1 x 2 Thin
41677
Light Bluish Gray 4
Technic Beam 1 x 4 Thin
32449
Yellow 4
Technic Beam 1 x 9 Thick
40490
Yellow 4
Technic Beam 3 x 0.5 Liftarm with Boss and Pin / Crank
33299a
Black 4
Technic Beam 3 x 5 L-Shape Thick
32526
Yellow 4
Technic Beam 5 x 7 L-Shape with Quarter Ellipse Thin
32251
Black 4
Technic Brick 1 x 4 [3 Pin Holes]
3701
Yellow 4
Technic Brick 1 x 6 [5 Pin Holes]
3894
Yellow 4
Technic Brick 1 x 8 [7 Pin Holes]
3702
Yellow 4
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
32123b
Yellow 4
Technic Knob Wheel
32072
Yellow 4
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
32054
Black 4
Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole
32124
Black 4
Tile 1 x 2 with Groove
3069b
Yellow 4
Brick Round 2 x 2 with Axle Hole
3941
Trans-Neon Orange 3
Plate 2 x 2
3022
Yellow 3
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)
4032a
Black 3
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]
2654
Black 3
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes
42003
Yellow 3
Technic Beam 1 x 11 Thick
32525
Yellow 3
Technic Beam 1 x 9 Bent (6 - 4) Thick
6629
Black 3
Technic Beam 1 x 9 Bent (6 - 4) Thick
6629
Yellow 3
Technic Beam 1 x 9 Bent (7 - 3) Thick
32271
Yellow 3
Technic Beam 2 x 4 L-Shape Thick
32140
Blue 3
Technic Pin Double with Axle Hole
32138
Light Bluish Gray 3
Technic Wedge Belt Wheel [aka Pulley]
4185
Light Bluish Gray 3
Grille 1 x 4 [Two Pins]
30622
Yellow 2
Large Figure Skeletal, Limb 1 x 3 x 7 Beam with Axle Holes (Bohrok)
41672
Black 2
Plate 1 x 10
4477
Black 2
Plate 1 x 2
3023
Dark Bluish Gray 2
Plate 1 x 3
3623
Dark Bluish Gray 2
Plate 2 x 2 Corner
2420
Yellow 2
Plate Round 1 x 1 with Solid Stud
6141
Trans-Red 2
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)
3794a
Yellow 2
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]
2444
Black 2
Pneumatic Cylinder Bracket
53178
Yellow 2
Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm)
47225
Yellow 2
String with End Studs 31L Overall
14226c31
Black 2
Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle)
6553
Black 2
Technic Axle 12
3708
Black 2
Technic Axle Connector with Axle Hole
32039
Black 2
Technic Axle Pin without Friction Ridges Lengthwise
3749
Tan 2
Technic Axle and Pin Connector Angled #2 - 180°
32034
Light Bluish Gray 2
Technic Axle and Pin Connector Angled #3 - 157.5°
32016
Black 2
Technic Axle and Pin Connector Angled #5 - 112.5°
32015
Black 2
Technic Axle and Pin Connector Perpendicular Double
32291
Black 2
Technic Axle and Pin Connector Perpendicular Double Split
41678
Yellow 2
Technic Beam 1 x 11.5 Double Bent Thick
32009
Black 2
Technic Beam 1 x 13 Thick
41239
Light Bluish Gray 2
Technic Beam 1 x 2 Thick
43857
Black 2
Technic Beam 1 x 2 Thick
43857
Blue 2
Technic Beam 1 x 2 Thick
43857
Yellow 2
Technic Beam 1 x 2 Thin
41677
Black 2
Technic Beam 1 x 3 Thick
32523
Light Bluish Gray 2
Technic Beam 1 x 3 Thin
6632
Yellow 2
Technic Beam 1 x 5 Thin
32017
Light Bluish Gray 2
Technic Beam 1 x 7 Bent (4 - 4) Thick
32348
Light Bluish Gray 2
Technic Beam 1 x 9 Thick
40490
Black 2
Technic Beam 2 x 4 L-Shape Thick
32140
Black 2
Technic Brick 1 x 1 with Pin Hole
6541
Yellow 2
Technic Brick 1 x 14 [13 Pin Holes]
32018
Black 2
Technic Brick 1 x 16 [15 Pin Holes]
3703
Dark Bluish Gray 2
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]
32064b
Yellow 2
Technic Engine Crankshaft
2853
Light Bluish Gray 2
Technic Engine Crankshaft Center
2854
Dark Bluish Gray 2
Technic Gear 24 Tooth Clutch with Dark Bluish Gray Center
76244
White 2
Technic Pin Connector Block 1 x 5 x 3
32333
Light Bluish Gray 2
Technic Pin Connector Plate with One Hole (Single on Bottom)
32529
Black 2
Technic Pin Connector Round [No Slot]
75535
Black 2
Technic Wedge Belt Wheel [aka Pulley]
4185
Black 2
Tile 1 x 4 with Groove
2431
Yellow 2
Wheel Spoked 2 x 2 with Pin Hole
30155
Black 2
Battery Box, 9V 4 x 14 x 4 with Dark Bluish Gray Base [Complete Assembly]
2847c03
Yellow 1
Hook, Technic - Large
70496
Black 1
Hose, Pneumatic 4mm D. 16L
5102c16
Black 1
Hose, Pneumatic 4mm D. 16L
5102c16
Blue 1
Motor, RC Race Buggy
42908
Black 1
Plate 1 x 6
3666
Black 1
Plate 1 x 6
3666
Light Bluish Gray 1
Plate 2 x 3
3021
Yellow 1
Plate 2 x 8
3034
Yellow 1
Plate 4 x 6
3032
Dark Bluish Gray 1
Plate 4 x 8
3035
Dark Bluish Gray 1
Plate Special 2 x 2 with 2 Pin Holes
2817
Yellow 1
Pneumatic Pump New Style with Black Top
2797c02
Yellow 1
Pneumatic Switch with Pin Holes
47223a
Dark Bluish Gray 1
Pneumatic T-Piece (T Bar) [New Style]
4697b
Light Bluish Gray 1
Sticker Sheet for Set 8421-1
53535
[No Color/Any Color] 1
String Cord Medium Thickness 250cm
14728c250
Black 1
Technic Axle 3 with Stud
6587
Dark Bluish Gray 1
Technic Axle 32
50450
Black 1
Technic Axle and Pin Connector Angled #1
32013
Black 1
Technic Beam 1 x 11.5 Double Bent Thick
32009
Yellow 1
Technic Beam 1 x 2 Thick
43857
Light Bluish Gray 1
Technic Beam 1 x 5 Thick
32316
Black 1
Technic Beam 1 x 7 Thin
32065
Black 1
Technic Beam 1 x 7 Thin
32065
Yellow 1
Technic Beam 1 x 9 Thick
40490
Light Bluish Gray 1
Technic Changeover Catch - + opening
6641
Red 1
Technic Driving Ring 2L, 4 Ridges
6539
Red 1
Technic Gear 20 Tooth Bevel
32198
Light Bluish Gray 1
Technic Gear 24 Tooth Crown with Reinforcements [New Style]
3650c
Light Bluish Gray 1
Technic Gear 24 Tooth [New Style with Single Axle Hole]
3648b
Light Bluish Gray 1
Technic Gear 36 Tooth Double Bevel
32498
Black 1
Technic Gear Differential, 24 -16 Tooth with Clutch on Both Sides
6573
Dark Bluish Gray 1
Technic Pin Double with Axle Hole
32138
Black 1
Technic Steering Wheel Small (3 Studs Diameter)
2819
Light Bluish Gray 1
Technic Turntable Large Type 2, 24/56 Tooth with Black Outside Gear Section [Complete Assembly]
50163
Dark Bluish Gray 1
Technic Worm Gear
4716
Black 1
Technic Worm Gear
4716
Light Bluish Gray 1
Tile 1 x 4 with Groove
2431
Black 1
Wire with Brick 2 x 2 x 2/3 Pair, 20L
5306bc020
Black 1
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
32123b
Light Bluish Gray 4 Spare
Technic Bush
3713
Light Bluish Gray 3 Spare
Technic Pin 1/2 without Friction Ridges
4274
Light Bluish Gray 3 Spare
Technic Pin 3/4
32002
Dark Bluish Gray 3 Spare
Plate Round 1 x 1 with Solid Stud
6141
Trans-Clear 2 Spare
Plate Round 1 x 1 with Solid Stud
6141
Trans-Neon Orange 2 Spare
Plate Round 1 x 1 with Solid Stud
6141
Trans-Red 1 Spare
Pneumatic T-Piece (T Bar) [New Style]
4697b
Light Bluish Gray 1 Spare
Technic Beam 1 x 15 Thick
32278
Light Bluish Gray 1 Spare
Technic Bush
3713
Black 1 Spare
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
32123b
Yellow 1 Spare

Part images: LDraw library (ldraw.org), license CC BY 4.0. Part data: Rebrickable.

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