Greetings. My name is Tyler Perkins and I'm a current student at UTI and I am now going under the Ford Accelerated Credential Training (FACT) and I have access to the new model training of the 2005 focus and found out why there is no key on the crank pully. They started using a friction washer instead and in order for technicians to do any service to it they have to use a dead stop inserted into the block. I can get you the complete list of instructions on how to remove it and install it if you are interested from what I gathered its simple just need to follow the instructions to the letter! And from the looks of it you might need the tool that is inserted into the block and a crank pully holder.
Talk to ya later
Tyler
Talk to ya later
Tyler