PINPOINT TEST V : Manual Door Lock Cylinder Inoperative
- V1 CHECK THE LOCK CYLINDER OPERATION AFTER LUBRICATION
- Spray a lock lubricant such as Penetrating and Lock Lubricant (US); Penetrating Fluid (Canada) into the lock cylinder opening for a couple seconds.
- Operate the door lock cylinder with the key.
Does the door lock and unlock using the door lock cylinder?
Yes The concern was caused by an insufficiently lubricated lock cylinder. Spray a Multi-Purpose Grease into the lock cylinder for a couple seconds to provide long term lubrication. No GO to V2. - V2 CHECK THE DOOR LOCK CYLINDER
- Remove the door lock cylinder. Refer to Door Lock Cylinder .
- Operate the door lock cylinder with the key.
Does the door lock cylinder rotate freely to both lock and unlock positions?
Yes GO to V3. No INSTALL a new door lock cylinder. REFER to Door Lock Cylinder . - V3 CHECK THE DOOR LOCK CYLINDER LINKAGE
- Operate the door lock cylinder while observing the linkage.
Is the door lock cylinder rod and lever bent or binding?
Yes REPAIR as necessary. No INSTALL a new door latch. REFER to Front Door Latch .