Ignition of a T444E engine

Good afternoon friends I have a problem I have an International Antral Bus Model97 with T444E engine. A week ago that the bus costs me that it starts in the Ma {anas I give it on the ignition and the mptor is heard as slow as if you had the low battery but they are new as it grabs the engine strength and turns faster and it is re -lleded until it starts once the bus starts can pass the bus all day off that if you return in the afternoon and light it on it. You go out and the next day in the morning is my thing, someone could help me see where I can start checking thanks.

Hello Luismuñoz, for what it seems, that the batteries lacks strength to be stopped, feels that even if they are new, they are not well loaded, review cleaning the terminals, dough points and the alternator take. You may have some dough derivation that during the night you get the load. If you wear speaking, put it during the night to see