I'm happy to use service as a verb - although in slang term it can relate to people as well as animals here - so use with caution!

It would be normal to service a car or a lawn mower.

I'm not sure about "to factor". In maths it would be to factorise. In estate management in Scotland a factor is an estate manager. It's used in finance as a way of reducing debt - is it used as a verb there?