Makita GN420C spare parts

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Click a part on the diagram, or find it in the list by its number. Select as many parts as you need and add them to your cart together. All parts are genuine Makita and special order, ordered in once you buy.

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Makita GN420C exploded parts diagram 1 · Hex. Socket Head Bolt M4x10 (922112-8) 2 · Exhaust Cover (345984-8) 3 · Exhaust Valve (345982-2) 4 · Exhaust Plate (345983-0) 5 · Punching Metal (352008-3) 6 · Hex. Socket Head Bolt M4x10 (922112-8) 7 · Silencer (352009-1) 8 · Housing (450729-2) 9 · Driver Guide (310517-8) 10 · Nail Plate (310524-1) 11 · Hex. Socket Head Bolt M4x10 (266167-6) 12 · Adjuster Rod (326246-3) 13 · Adjuster (453806-9) 14 · Adjuster Guide (453807-7) 15 · Compression Spring 2 (234254-9) 16 · Steel Ball 2.3 (216031-1) 17 · Adjuster Block (310519-4) 18 · Rubber Ring 5 (262164-0) 19 · Contact Top (331996-7) 20 · Arm (346613-6) 21 · Hex. Socket Head Bolt M5x20 (266464-0) 22 · Dust Cover Complete (141611-3) 23 · Under Driver Guide Complete (142683-1) 24 · Hex. Socket Head Bolt M5x12 (922212-4) 25 · Compression Spring 8 (234255-7) 26 · Stop Rubber (424138-1) 27 · Cylinder (318902-9) 28 · Cylinder Ring (324973-6) 29 · Hex. Socket Head Bolt M4x16 (922127-5) 30 · Chamber Top (318322-7) 31 · Chamber Seal Ring (424139-9) 32 · Chamber (318320-1) 33 · Spring Pin 3-32 (951078-5) 34 · Retaining Ring (int) R-58 (962254-6) 35 · Piston Ring (324972-8) 36 · Driver Complete (141606-6) 37 · Front Cushion (424137-3) 38 · +pan Head Screw M4x10 (265069-3) 39 · Trigger Lock Plate (345985-6) 40 · Set Screw (cup Point) M3x4 (913904-6) 41 · Fan 60 (241674-0) 42 · O-Ring 60 (213679-0) 43 · Cylinder Head (318321-9) 44 · O Ring 10 (213070-2) 45 · Spark Plug (162269-5) 46 · C Compression Spring 12-18 (233969-5) 47 · Motor Sleeve (454002-2) 48 · Epoxy Washer 2 (261141-9) 49 · Steel Ball 3 (216019-1) 50 · DC Motor (629860-7) 51 · Pan Head Screw M4x8 (652014-1) 52 · C Compression Spring 12-18 (233969-5) 53 · Flat Washer 10 (253024-7) 54 · Retaining Ring R-24 (962103-7) 55 · Top Cap (450730-7) 56 · Sleeve 5 (257672-4) 57 · Flat Washer 5 (941101-4) 58 · Hex. Socket Head Bolt M5x25 (922242-5) 59 · Filter Cover (450733-1) 60 · Filter (162270-0) 61 · Actuater (454202-4) 62 · Stem Adapter (454003-0) 63 · Rubber Sleeve 9 (422044-4) 64 · Shoulder Pin 4 (324976-0) 65 · Handle Set (187560-0) 66 · Tapping Screw 5x25 (266041-8) 67 · Hex. Socket Head Bolt M5x10 (265907-9) 68 · Flat Washer 5 (941102-2) 69 · Hex.Socket Head Shoulder Bolt (266780-0) 70 · Battery Case Set (188598-8) 71 · Terminal (643817-4) 72 · Rubber Ring 40 (424152-7) 73 · Battery Case Set (188598-8) 74 · Set Plate (345749-8) 75 · Hook (324953-2) 76 · Hook Holder (318338-2) 77 · Square Nut M6 (252185-0) 78 · Lead Wire Cover (450740-4) 79 · Compression Spring 5 (234113-7) 80 · Switch Unit (638642-6) 81 · Trigger (450736-5) 82 · Switch Plate Complete (141610-5) 83 · Chamber Lock Bar (324974-4) 84 · Tapping Screw 4x18 (265995-6) 85 · Line Filter (688131-1) 86 · Light Circuit (620160-8) 87 · Spark Unit (620159-3) 88 · Handle Set (187560-0) 89 · Flat Washer 5 (941102-2) 90 · Hex. Socket Head Bolt M5x10 (265907-9) 91 · GN420C Name Plate (814A21-0) 92 · Switch Unit (638642-6) 94 · Pin 4 (268280-6) 95 · Pin 5 (268225-4) 96 · Pusher Holder (453808-5) 97 · Spiral Spring Complete (141609-0) 98 · Pusher (310520-9) 99 · Urethane Ring 3 (262120-0) 100 · Lock Plate (310596-6) 101 · Compression Spring 5 (233037-4) 102 · Square Nut M5-8 (264050-1) 103 · Hex. Socket Head Bolt M5x8 (265480-9) 104 · Magazine (331998-3) 105 · Magazine Cap (453809-3) 106 · Hex. Socket Head Bolt M5x14 (922217-4) 107 · Nail Stopper (346615-2) 108 · O Ring 4 (213009-5) 109 · Spring Pin 3-12 (951057-3) 110 · Compression Spring 6 (234012-3) 111 · Flat Washer 6 (941151-9) 112 · Spring Washer 6 (942151-2) 113 · Thumb Screw M6x29 (265796-2)
  1. 1
    Hex. Socket Head Bolt M4x10 922112-8 Qty used: 2
    $3.95
  2. 2
    Exhaust Cover 345984-8
    $13.87
  3. 3
    Exhaust Valve 345982-2
    $4.82
  4. 4
    Exhaust Plate 345983-0
    $12.24
  5. 5
    Punching Metal 352008-3
    $11.13
  6. 6
    Hex. Socket Head Bolt M4x10 922112-8 Qty used: 2
    $3.95
  7. 7
    Silencer 352009-1
    $50.32
  8. 8
    Housing 450729-2
    $113.38
  9. 9
    Driver Guide 310517-8
    $392.89
  10. 10
    Nail Plate 310524-1
    $20.83
  11. 11
    Hex. Socket Head Bolt M4x10 266167-6 Qty used: 2
    $3.95
  12. 12
    Adjuster Rod 326246-3
    $11.58
  13. 13
    Adjuster 453806-9
    $10.53
  14. 14
    Adjuster Guide 453807-7
    $8.43
  15. 15
    Compression Spring 2 234254-9
    $3.95
  16. 16
    Steel Ball 2.3 216031-1
    $3.95
  17. 17
    Adjuster Block 310519-4
    $16.81
  18. 18
    Rubber Ring 5 262164-0
    $3.95
  19. 19
    Contact Top 331996-7
    $109.14
  20. 20
    Arm 346613-6
    $16.81
  21. 21
    Hex. Socket Head Bolt M5x20 266464-0 Qty used: 4
    $4.20
  22. 22
    Dust Cover Complete 141611-3
    $50.40
  23. 23
    Under Driver Guide Complete 142683-1
    $99.48
  24. 24
    Hex. Socket Head Bolt M5x12 922212-4 Qty used: 2
    $4.48
  25. 25
    Compression Spring 8 234255-7 Qty used: 2
    $3.95
  26. 26
    Stop Rubber 424138-1 Qty used: 2
    $3.95
  27. 27
    Cylinder 318902-9
    $241.35
  28. 28
    Cylinder Ring 324973-6 Qty used: 2
    $14.78
  29. 29
    Hex. Socket Head Bolt M4x16 922127-5 Qty used: 4
    $4.00
  30. 30
    Chamber Top 318322-7
    $21.41
  31. 31
    Chamber Seal Ring 424139-9
    $9.20
  32. 32
    Chamber 318320-1
    $38.13
  33. 33
    Spring Pin 3-32 951078-5 Qty used: 2
    $3.95
  34. 34
    Retaining Ring (int) R-58 962254-6
    $6.96
  35. 35
    Piston Ring 324972-8 Qty used: 2
    $24.43
  36. 36
    Driver Complete 141606-6
    $306.43
  37. 37
    Front Cushion 424137-3
    $13.77
  38. 38
    +pan Head Screw M4x10 265069-3 Qty used: 2
    $3.95
  39. 39
    Trigger Lock Plate 345985-6
    $7.67
  40. 40
    Set Screw (cup Point) M3x4 913904-6
    $3.95
  41. 41
    Fan 60 241674-0
    $27.47
  42. 42
    O-Ring 60 213679-0
    $36.87
  43. 43
    Cylinder Head 318321-9
    $164.59
  44. 44
    O Ring 10 213070-2
    $3.95
  45. 45
    Spark Plug 162269-5
    $19.84
  46. 46
    C Compression Spring 12-18 233969-5
    $3.95
  47. 47
    Motor Sleeve 454002-2
    $4.59
  48. 48
    Epoxy Washer 2 261141-9
    $3.95
  49. 49
    Steel Ball 3 216019-1
    $3.95
  50. 50
    DC Motor 629860-7
    $334.55
  51. 51
    Pan Head Screw M4x8 652014-1
    $5.38
  52. 52
    C Compression Spring 12-18 233969-5
    $3.95
  53. 53
    Flat Washer 10 253024-7
    $5.38
  54. 54
    Retaining Ring R-24 962103-7
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  55. 55
    Top Cap 450730-7
    $25.98
  56. 56
    Sleeve 5 257672-4 Qty used: 4
    $3.95
  57. 57
    Flat Washer 5 941101-4 Qty used: 4
    $3.95
  58. 58
    Hex. Socket Head Bolt M5x25 922242-5 Qty used: 4
    $4.48
  59. 59
    Filter Cover 450733-1
    $7.67
  60. 60
    Filter 162270-0
    $22.91
  61. 61
    Actuater 454202-4
    $16.56
  62. 62
    Stem Adapter 454003-0
    $4.62
  63. 63
    Rubber Sleeve 9 422044-4
    $3.95
  64. 64
    Shoulder Pin 4 324976-0
    $3.95
  65. 65
    Handle Set 187560-0 Includes part 88
    $176.32
  66. 66
    Tapping Screw 5x25 266041-8 Qty used: 6
    $3.95
  67. 67
    Hex. Socket Head Bolt M5x10 265907-9
    $3.95
  68. 68
    Flat Washer 5 941102-2
    $3.95
  69. 69
    Hex.Socket Head Shoulder Bolt 266780-0
    $8.43
  70. 70
    Battery Case Set 188598-8 Includes part 73
    $19.84
  71. 71
    Terminal 643817-4
    $4.20
  72. 72
    Rubber Ring 40 424152-7 Qty used: 2
    $3.95
  73. 73
    Battery Case Set 188598-8 Includes part 70
    $19.84
  74. 74
    Set Plate 345749-8 Qty used: 4
    $3.95
  75. 75
    Hook 324953-2
    $13.87
  76. 76
    Hook Holder 318338-2
    $15.30
  77. 77
    Square Nut M6 252185-0
    $6.14
  78. 78
    Lead Wire Cover 450740-4
    $8.36
  79. 79
    Compression Spring 5 234113-7
    $3.95
  80. 80
    Switch Unit 638642-6
    $32.03
  81. 81
    Trigger 450736-5
    $7.67
  82. 82
    Switch Plate Complete 141610-5
    $26.89
  83. 83
    Chamber Lock Bar 324974-4
    $5.30
  84. 84
    Tapping Screw 4x18 265995-6 Qty used: 2
    $3.95
  85. 85
    Line Filter 688131-1
    $5.05
  86. 86
    Light Circuit 620160-8
    $34.02
  87. 87
    Spark Unit 620159-3
    $274.95
  88. 88
    Handle Set 187560-0 Includes part 65
    $176.32
  89. 89
    Flat Washer 5 941102-2
    $3.95
  90. 90
    Hex. Socket Head Bolt M5x10 265907-9
    $3.95
  91. 91
    GN420C Name Plate 814A21-0
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  92. 92
    Switch Unit 638642-6
    $32.03
  93. 93
    Inc. 37-39,42,43 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  94. 94
    Pin 4 268280-6
    $5.30
  95. 95
    Pin 5 268225-4
    $3.95
  96. 96
    Pusher Holder 453808-5
    $15.78
  97. 97
    Spiral Spring Complete 141609-0
    $44.08
  98. 98
    Pusher 310520-9
    $23.12
  99. 99
    Urethane Ring 3 262120-0
    $3.95
  100. 100
    Lock Plate 310596-6
    $28.31
  101. 101
    Compression Spring 5 233037-4 Qty used: 2
    $3.95
  102. 102
    Square Nut M5-8 264050-1
    $3.95
  103. 103
    Hex. Socket Head Bolt M5x8 265480-9
    $3.95
  104. 104
    Magazine 331998-3
    $134.34
  105. 105
    Magazine Cap 453809-3
    $88.16
  106. 106
    Hex. Socket Head Bolt M5x14 922217-4 Qty used: 2
    $3.95
  107. 107
    Nail Stopper 346615-2
    $3.95
  108. 108
    O Ring 4 213009-5
    $3.95
  109. 109
    Spring Pin 3-12 951057-3
    $4.88
  110. 110
    Compression Spring 6 234012-3
    $3.95
  111. 111
    Flat Washer 6 941151-9
    $3.95
  112. 112
    Spring Washer 6 942151-2
    $3.95
  113. 113
    Thumb Screw M6x29 265796-2
    $3.95
  114. 115
    Inc. 37-39,42,43 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  115. 116
    Pin 4 268280-6 Not shown on diagram
    $5.30
  116. 117
    Pin 5 268225-4 Not shown on diagram
    $3.95
  117. 118
    Pusher Holder 453808-5 Not shown on diagram
    $15.78
  118. 119
    Spiral Spring Complete 141609-0 Not shown on diagram
    $44.08
  119. 120
    Pusher 310520-9 Not shown on diagram
    $23.12
  120. 121
    Urethane Ring 3 262120-0 Not shown on diagram
    $3.95
  121. 122
    Lock Plate 310596-6 Not shown on diagram
    $28.31
  122. 123
    Compression Spring 5 233037-4 Qty used: 2 Not shown on diagram
    $3.95
  123. 124
    Square Nut M5-8 264050-1 Not shown on diagram
    $3.95
  124. 125
    Hex. Socket Head Bolt M5x8 265480-9 Not shown on diagram
    $3.95
  125. 126
    Magazine 331998-3 Not shown on diagram
    $134.34
  126. 127
    Magazine Cap 453809-3 Not shown on diagram
    $88.16
  127. 128
    Hex. Socket Head Bolt M5x14 922217-4 Qty used: 2 Not shown on diagram
    $3.95
  128. 129
    Nail Stopper 346615-2 Not shown on diagram
    $3.95
  129. 130
    O Ring 4 213009-5 Not shown on diagram
    $3.95
  130. 131
    Spring Pin 3-12 951057-3 Not shown on diagram
    $4.88
  131. 132
    Compression Spring 6 234012-3 Not shown on diagram
    $3.95
  132. 133
    Flat Washer 6 941151-9 Not shown on diagram
    $3.95
  133. 134
    Spring Washer 6 942151-2 Not shown on diagram
    $3.95
  134. 135
    Thumb Screw M6x29 265796-2 Not shown on diagram
    $3.95
  135. 1001
    Safety Goggle 195246-2 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  136. 1002
    Hex. Wrench 4 783230-5 Not shown on diagram
    $3.95
  137. 1003
    Plastic Carrying Case 821512-8 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  138. 1004
    GN420CLSE Plastic Case Label 800P22-4 Qty used: 2 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  139. 1005
    DC07SA Battery Charger ***DC07SA Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us
  140. 1006
    Battery BL7010 Set 194355-4 Not shown on diagram
    Discontinued Call or email to check availability Call (03) 5241 9555 Email us

Can't find the part you need? Call (03) 5241 9555 or email sales@toolup.com.au with your model number.

Makita GN420C spare parts: common questions

Where can I buy spare parts for the Makita GN420C?

Toolup Australia sells genuine Makita spare parts for the GN420C. This exploded diagram lists 140 parts, and 131 can be ordered online now. Parts are posted Australia-wide or can be collected from our Geelong store.

How do I find the right part for my Makita GN420C?

Find the part on the exploded diagram and note its number, then select that number in the parts list. Each row shows the genuine Makita part number, price and quantity used.

What if the part I need for my GN420C isn’t available online?

Parts marked Discontinued or Price on request can often still be sourced. Call (03) 5241 9555 or email sales@toolup.com.au with the model number (GN420C) and the diagram number and we’ll check for you.

Can Toolup repair my Makita GN420C?

Yes. Our servicing team repairs Makita tools. Visit our servicing page or call (03) 5241 9555 to book a repair.