The flywheel friction clutch is factory adjusted. It is subject to wear during operation as
the result of overload-induced slip, and will therefore require tuning. This is effected by
tightening each bolt (A) one quarter-turn to obtain a uniformly increase compression of
the springs. Avoid tightening to the point where the bolts lock completely, otherwise the
clutch cannot operate and the drive shaft will fail as soon as any overloading occurs.