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Cat 416D-446D Backhoe Loader Key Start Ignition Switch 1684609 – D Series

SKU:
4556633
FitsModel:
416D, 420D, 424D, 428D, 430D, 432D, 438D, 442D, 446D
ListDescription:
Start Ignition Switch
Cat 416D-446D Backhoe Loader Key Start Ignition Switch 1684609 – D Series
Part # 4556633

Fits Models At A Glance:

  • Caterpillar Backhoe Loaders – D Series: 416D, 420D, 424D, 428D, 430D, 432D, 438D, 442D, 446D

Key Notes:

  • Supersession: 4556633 is the current Cat number and replaces the earlier 1684609.
  • Part Number(s): 1684609 (168-4609)
  • Application: Key start switch assembly for the D-series backhoe console
  • Serial Number Notes: Cataloged for the nine D-series models without a serial break. The B-series (416B, 446B) uses start switch 1632659 and the E/F series uses a multifunction switch — do not cross them over.
  • Manufacturer: Costex Tractor Parts (CTP), made in USA
  • Condition: Aftermarket replacement part

Common Use Case or Symptoms:

Use when the key will not return from start, the switch has to be jiggled to crank, or the machine dies when the key settles back to run on a Cat 420D or 430D.

Why Choose Broken Tractor:

  • ✅ Made in USA by Costex — CTP builds this switch stateside, not a no-name import.
  • ✅ D-series only, clearly labeled — We name the B-series and E-series switches so you do not buy the wrong console part.
  • ✅ Fast Shipping from a U.S.-Based Team — ready to ship from our U.S. warehouses.
$40.00

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Product: Category: Brand: Head Title: Start Ignition Switch | Broken Tractor | 1684609