You can install them if your front wheels are contacting the loader frame. Otherwise no need.Sorry, I am talking about the steering stops that attach to the front axle and limit how far the front wheels can turn. They came installed on my Kubota B3350SU. The steering stops are listed as an option on the Kubota LX4020.
I don't know all of the design / shape diffences, but the 3520 & 4020 model's front axle is 4" wider than the '10' series were. *the new 2620 may have the previous front axle, I'm not positive though.Found the pictures. This was on my 2610, not sure if the axle is the same in the 4020.
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