The water pump is on the left side so this must be the Buda engine. You can see it on the lower left of the first picture. The diagram on dozer identifies the grease fitting on top as the fan belt tensioner. The long screw ends up right on the fan belt pulley, but when I loosen it it doesn't seem to do anything. The grease fittings on the bottom are for the fan and the water pump. The picture on the right is a top view. The empty pulley on top is one of the water pump pulleys. The one in the middle goes to the generator and the empty pulley below.