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Manual operations
FK 3-1 / FK 3-06 motor-wound spring
operating mechanism
21.5.2003
© ALSTOM
48.020.181E/2
21/26
Discharge spring
• Turn tie rod 71.08 of closing spring discharging device 71.15 counter-
clockwise to discharge the closing spring. Crank flywheel 70.30 will turn
counterclockwise.
• Continue turning tie rod 71.08 until closing spring discharging device
71.15 is free and can be withdrawn.
71.08 Tie rod 71.15 Closing spring discharging de-
vice
Operating state of
spring operating
mechanism after
manual discharge of
closing spring
Positions of position indicators
The spring operating mechanism now has no stored energy. The indicators
stand as shown below.
Spring position indicator shows closing
spring discharged
Circuit breaker position indicator
shows OPEN, trip spring dis-
charged
Set return stop
• Tighten clamp shackle screw 71.13 to 5Nm ±10%.
• The return stop will not function properly if the clamp shackle screw is
not tightened to the specified torque.
• If the closing spring is being charged with the hand crank under these
conditions and the hand crank is let go before the end position is
reached, it will turn backwards at high speed. Injury may result.
WARNING
• After performing manipulations on the return stop, tighten the
clamp shackle mounting screw to a torque of 5 Nm ±10%.
71.15
71.08
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