On our RTV 400 the front blade is easy to take off and put on.
Lower the blade on a flat surface until the chain is slack.
Remove the 20mm long pin that runs across under the lower edge of the bumper bracket.
Unscrew the large bolt with the bar across the top. This is a clamp that holds the blade bracket to the flat plate on the front of the mounting bracket. Lift the top lip of the blade bracket up and away from the top edge of the bumper bracket. Back away from the blade.
Unhook the wire harness.
Different years and models may be a little different.