BTW, your HT75 would be listed under the title "Pole Pruner", but would refer to the trimmer powerhead which drives it for parts and service manual info.
The Stihl Mediacat has been Stihl's part lookup and mechanic's manual dvd for years, which they provided for the dealers that didn't have high speed internet, it is the Holy Grail for chainsaw nuts, having the complete parts lookups, and all of the newer
mechanic's manuals, but the main problem with it was that the program would expire every year......
One chainsaw/computer geek stripped off the expiration part, so the chain letter started. No monies were to change hands, so
the lawyers would back off, hopefully. I would have tried to start a thread here, but these guys here are nuts.....