Brennan Diesel is a service company capable of providing all of your Caterpillar Engine, Generator, and Marine Gear needs. Having extensive knowledge and hands on experience in the various fields of Marine Propulsion, Power Generation, and Truck Engine application. With this great knowledge and experience from as far back as the Caterpillar D17000 V-8 5.75 bore engines up through the D397’S-D399’S-D343/1693-3300-3400 Series to the current 3500 Series, and the latest "C” family of engines including all of the past {PEEC} and current HEUI engines assures a first time correct diagnosis and repair. No problem and repair too small or large.