View 4 Photos View 0 Videos Caterpillar 420E Boom Newly Listed $8,000 USD Good used Boom AS from a Cat 420E backhoe. Will fit models 420F, 432E, 434E ConditionUsed MLS Number14116560CategoryBoom Attachments Last Updated1/29/2026 LocationUnion Gap, WA, US Sold ByDukes Equipment & Parts (844) 334-___ SHOWNUMBERCall Seller Email Seller Save More Info