F3R motor lagoon

Hello everyone, I would like your help, because I have a problem with my lagoon: it turns out that it has been time for belt change, (distribution and axusiliary services and I find that I can not remove the crankshaft pulley, for not knowing how the engine, some could solve the problem, first of all thanks for the help of greetings.

Look if the pulley is armed no stagn problem because you take out the part that arms and make marks of yours before crossing it without taking out the central bolt but everything goes to shit, if it is not armed, you need special tools and there is no other way.