Its a bit of both the main manufacturers linde , toyota ,crown , Jungheinrich have there own service engineers in certain markets ,NACCO and others mainly Asian go through interdependent dealers. The leasing side is normally done as a separate contract
with the leasing company and the customer with the service side being looked after by the manufacture or dealer. Some leasing companies will have the name of the dealer or manufacture on the top of the rental agreement but at the bottom it will state that the agreement will be between the leasing company and the customer