T146821 socket (w/ 2 gussets) Fits John DeereOne New Aftermarket Replacement Blade Pivot Socket (with 2 Gussets) for John Deere Crawler Dozers This aftermarket replacement blade pivot socket with two weld on gussets is a key component of the dozer blade pivot assembly on John Deere (JD) crawler dozers. The socket houses the trunnion ball at the center blade pivot point, and the two included gussets weld onto the socket to reinforce and extend service life. OEM part number T146821 was superseded