Expansion of ESP with the X25DT without special tools possible???

Hello dear diesel screwdriver. Must be annoying again because of the topic ESP. I want to expand the ESP soon on the scrap from nem X25DT. Can I remove the pump wheel from the chain without special tools? I am not quite the hardcore diesel screwdriver! Bridge and injection lines out is clear, then the two or three screws must be removed from the engine block. Does the chains have to be completely removed at all? Is anything else still problematic during the removal? And where can I get the 6 matching protective caps f for the pump? Unfortunately I found nothing suitable in the search. MfG, Carlos.