A new lubrication system was needed that required a new pipe configuration running through holes drilled in the aft and forward prop shaft bearing bosses, and new tapped holes for the outboard AC seal.
Outboard seal - drilled and tapped 24 x M20 holes equi-spaced on a 710mm PCD.
Aft Bearing boss – drilled 4 x 20mm diameter holes x 1030 mm deep drilled through the boss.
Forward bearing boss – drilled 4 x 20mm diameter holes x 400 mm deep drilled through the boss.
Connections from the stern-tube pipe runs to the three tanks, one for the inboard seal, a main header tank and a void space header tank.
