Small Engines (Lawn Mowers, etc.): changing front tires, craftsman model, cotter pin

Question
how do you take the front tires off of the craftsman model 536-270302?  It has a flat and I want to take it to a repair shop.  

Answer
remove front cap  should be black  over axle.  there will be a cotter pin   or c clip  ....  remove it,  and pull tire and wheel off of axle.
i have had some people get tire sealer which is yellow in color, removing valve stem  core placing it in tire and airing up?????   may want to try.  i believe it called tire goop.