The John Deere 7R 310 rear hitch: Standard: Category 3N/3 with Quik-Coupler; Optional: Category 3/3N with hook ends, Category 4N/3 with Quik-Coupler; Category 4N/3 with hook ends.
The John Deere 7R 310 rear hitch: Standard: Category 3N/3 with Quik-Coupler; Optional: Category 3/3N with hook ends, Category 4N/3 with Quik-Coupler; Category 4N/3 with hook ends.