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As @ElephantBreath said, if the cylinder is gritty and rough to turn the key, graphite is recommended for lubricating it, but flush out with something that's not going to set, or collect more muck in the future.
So I shouldn't undo the torx screws and the gearboxes come out with the strip?
Exactly. If you remove a short M4 machine screw from the handle area or next to a hook, put it back in.
If your mechanism has screws holding the gearboxes onto the face plate, leave them in place and remove the complete strip as one. If after cleaning and lube, it's still poor, remove the centre gearbox and see if its the centre or hook gearboxes. If its the centre, you can get replacements for some, but not all.Here's an
Top. Avocet mechanisms with the gearbox rivitted on.
Middle. ERA mechanism with gearbox screwed on
Bottom. ERA gearbox.
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user69121
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Cheers guys, will try this tomorrow
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Well I have had a new fireproof door and frame fitted, there seem to be the most pointless locking points. The catches come out when the door is closed, and open on opening that handle. There is no lift the handle to double or dead lock.
Will photograph and see what you guy think.
Polygon
lynx
Cheers, that all makes sense. So I shouldn't undo the torx screws and the gearboxes come out with the strip?
Might wait until it's not blowing a hoolie until attempting that.