Hi @rabond ,
Here’s the [http://tim.id.au/laptops/lenovo/thinkpad%20600%20600e.pdf|hardware maintenance manual] for the laptop.
Go to p.83-84 to view the necessary pre-requisite steps and then the procedure to remove the CPU card and the fan.
Hopefully this may help you to remove the fan
If the fan requires replacing, on p.109 Item #27 you will find the part number for the fan. Search online using the part number ''only'' will give results for suppliers of the part.