Spiral bevel gears fulfil the same purpose but have a better load carrying capacity.
The intake and exhaust cam shafts for each cylinder block are driven by worm gears, and are connected by shafts to the lower cam drive worm gear shafts.
The countershaft gear is integral with the countershaft. The countershaft, through bevel gears, drives the two accessory shafts, which in turn drive the fans. The magneto governor and drive gear are also driven off the end of the countershaft.
assembly is oiled by the engine’s lubrication system.