Complex sentence: An accessories section was powered off a shaft at the front of the engine at the main bearing, and a prominent oil tank was "wrapped" around the engine at about the 4 o'clock position, as viewed from the front.
Split into simpler sentences: An accessories section was powered off a shaft at the front of the engine at the main bearing. A prominent oil tank was "wrapped" around the engine at about the 4 o'clock position, as viewed from the front.