Flywheel
1 – mounting surface to the crankshaft flange; 2 – clutch mounting surface; 3 – supporting surface of the driven clutch disc
The flywheel surfaces mating with the crankshaft and the driven clutch disc must be free of scratches, burrs and be completely flat.
If there are scratches on the working surface 3 of the flywheel under the driven clutch disk, grind this surface, removing a metal layer no more than 1 mm thick. Then grind surface 2, maintaining a size of 0.5±0.1 mm and ensuring parallelism of surfaces 2 and 3 relative to surface 1. The tolerance for non-parallelism is 0.1 mm.
Install the flywheel on the mandrel, centering it on the mounting hole with an emphasis on surface 1, check the runout of planes 3 and 2. At the extreme points, the indicator should not show runouts exceeding 0.1 mm.
The original source is published on the website (VazBook)