Thumbturn does not extend bolt

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Answer
After installing a classroom deadbolt, there is potential for the thumbturn to project the bolt only, get stuck in one position, or move both directions but not move the bolt.  These are caused fro...
The spring in the hinge case or end case assembly lifts the crossbar and both lever arms.  If broken, the crossbar and lever arms will drop down. The weight of the crossbar and levers will automati...
The 09-900 mortise cylinder thumbturn has three handing options: right hand, left hand, and non-handed.  Handing of the cylinder is done by a check ball and spring placed in the housing a...
Also applies to the 09-900 XL12-196 mortise cylinder coin turn.