V/D
S
ERIES
M
ECHANICAL ASSEMBLIES
Revision: 2.1 3-29
The end positions of the locking cylinders are queried by reed contacts
(Ring Close: cylinder Z2, and Ring Open: cylinder Z1) and the information
is passed to the controller.
Maintenance tasks
Replacing the scissor mechanism
Always replace the entire scissor mechanism!
For safety reasons, the scissor mechanism must only be
replaced as a complete unit.
The scissor mechanism is available from Systec as a complete
spare part.
Necessary tools 10 mm spanner
¼" socket set with short extension, with 8 mm and 10 mm
socket
3 mm Allen key
Have available When necessary, chain and cable spray for greasing the
scissor joints (Systec item no. 11921)
Removing the scissor mechanism:
• Remove the pneumatic supply hoses.
• Disconnect the reed contacts.
• Manually withdraw the locking shoe.
• Position the spanner on the long nuts and loosen the grub screws with
the Allen key.
• Unscrew the long nuts from the ring.
• Close the ring and push the locking shoe upwards.
• Unscrew the scissor plate with 8 mm socket.
• Withdraw the locking shoe and open the ring.
• Tilt the scissor plate slightly at the bottom and pull it off the frame.
Install the scissor mechanism in reverse order.
• Hand-tighten the long nuts and tighten the grub screws.
• Check the throttle no-return valves (cylinder Z1: 1 turn open,
cylinder Z2: 1 turn open).
• The scissor plate is greased in the factory. Regrease, if necessary.
• The position of the reed switch is factory-set: Check and adjust, if
necessary (see “Setting the reed contacts of the scissor mechanism”).
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