Siemens BTC-BR Manual Pagina 57

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Technical Product Manual
Fault analysis and repairs 1318
2 Removing and fitting housing cover
Section 2: Removing and fitting housing cover • Edition 12/2005
TU00-1318-0200302 © Siemens VDO Trading GmbH Section 2 2–35
2.9.5 Speed shaft
2.9.5.1 Replacing speed shaft
Fig. 2-30 Speed shaft
Procedure
Pull the defective speed shaft (1) from the clockwork mechanism.
Insert the speed shaft (48.8 mm long) into the clockwork mechanism
so that the driver pin (2) is located in area (A).
Push the speed shaft in up to the stop.
Because of the pressure spring and the torsion spring in the mechanism, the shaft will
spring back.
2.9.5.2 Checking speed shaft
Procedure
Push the speed shaft (1) down using flat tweezers.
Turn the driver pin (2) about 90 degrees in both directions and let it spring
back to its initial position.
If the driver pin (2) does not spring back to area (A), replace the mechanism
completely.
1 Speed shaft 3 Centring pins
2 Driver pin
3 *
2
3*1
A
* see paragraph 2.10.1
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