Products › Replacement Knife without Knifehead 40' - Double Drive Image 1 of 1 Replacement Knife without Knifehead 40' - Double Drive $1,216.00 Part #JD2029RKCompatible with: John Deere 640D, 640FD Add To Cart Added! Part #JD2029RKCompatible with: John Deere 640D, 640FD You Might Also Like Skid Shoe Kit 22' x 1/4" $672.00 Other SH250 Stub Guard for Agco Case-IH Challenger Gehl Hesston JD MF NH $17.50 New Holland 973 16ft Replacement Knife without Knifehead $491.00 New Holland 960 15ft Kit with Rollers OEM Knifehead $2,425.00 Skid Shoe - Left End $157.00