For lining up the Flywheels perfectly straightforward equipment is all that is required. The Flywheels should first be roughly lined up in the vice and then trued by placing the two Main-Bearings on their shafts, resting these on V blocks 5-in. from the shaft centres to the base and 2 3/8-in. apart, and then checking with a Dial-gauge on the Mainshafts. The Shafts are allowed a maximum out of truth figure of .001-in.