View 6 Photos View 0 Videos Used John Deere Backhoe Boom for 310D, 55MM/55MM/50MM/50MM Pin Holes, Part # AT146290 $3,750 USD Good used Backhoe Boom Fits to Deere 310D Backhoe Loaders. Pin Hole Diameters are listed from Where it attaches to the Stick to where it attaches to the Frame. 55mm, 55mm, 50mm, and 50mm ConditionUsedStock NumberAT146290 MLS Number11735695CategoryBoom Attachments Last Updated3/24/2026 LocationUnion Gap, WA, US Sold ByDukes Equipment & Parts (844) 334-___ SHOWNUMBERCall Seller Email Seller Save More Info