Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 7-23
Amendment Nr. 23
Date: Jan. 29. 2015
A4011121_B23.doc
Doc. No. A40-11-121
7.4.11 Drive Shaft System
System description:
See section 3.4.11
Check of Freewheel Clutch
Rotate propeller: Check smooth rotation in normal running direction and heavy friction in opposite direction.
Check tight fit of screw connections of freewheel clutch on engine flange.
NOTE:
Prior to function check, remove locking screw in freewheel clutch if installed for assembly or
disassembly of drive shaft unit.
Check of Drive Shaft
For inspection of the drive shaft remove propeller gear and drive shaft assy.
Check condition of composite shaft (e. g. chafing, cracks) and steel ends (e. g. corrosion, wear, abrasion of
surface treatment). Check connection between composite shaft and steel ends.
Check of Cardanic Rubber Disc Joints
Check condition (cracks and embrittlement of rubber) and tight screw connections of cardanic rubber disc
joints on freewheel clutch and on forward drive shaft. To inspect rubber discs for cracks and embrittlement,
apply a torsional load on the discs and observe rubber surface.
Removal of Drive Shaft:
The propeller shaft can be removed together with front gear and the propeller in one step:
Remove the propeller dome: lift off left and right leg room coverings in the cockpit, loosen clamping screw
at the guide block of the propeller dome, pull out locking screw with dome spring, disconnect flexible
hoses, disconnect the antenna connection to transponder/GPS, withdraw the dome to the front.
Remove cover of gearbox, fastened by tape and spring.
Disconnect the control cable of the propeller brake on the connector.
Disconnect the electrical connection (carbon brush)
Loosen fastening screws on the front gear supports (shockmounts), loosen balancing spring on top of the
front gear.
Pull out front gear with propeller shaft.
Disconnect the drive shaft on the gear (3x M10)
CAUTION:
The freewheel clutch remains on the engine. Removal by loosening of the attachment screws on
the engine flange.
Installation of Drive Shaft:
In the reverse sequence as removal. For tightening torques observe section 6.8. Care for screw lock with
Loctite 243.
CAUTION:
Clean the serration and check the condition of the surface coating. No signs of corrosion should
be detectable in and around the serration, and the colour of the tooth profiles should be the same
(see section 6.5.1).
