Austro Engine E4 Series - Examine the Two-Mass Flywheel

E4 Series
Maintenance Manual
Reciprocating
Engine
E4.08.04
Rev. 29
Page 231
85-Maintenance Procedures
01-Jul-2020
D. Examine the Two-Mass Flywheel
Overview
The flywheel structure consists of two discs (masses):
 Primary mass (E4A-73-300-201) – the bigger disc with the starter ring and pick up ring.
 Secondary mass (E4A-73-300-202) – the smaller disc.
The discs are connected together with springs at the inner of the primary disc.
Starter ring and pick-up ring are installed outer of the primary mass contour.
The pick-up ring has a clearance of two teeth which is necessary for the engine speed
measuring. Refer to Fig. 85 - 49.
Fig. 85 - 47 Two-Mass Flywheel (front side)
Secondary mass
Primary mass